Company lists · Data refreshed September 2026
Top 25 Energy efficiency consulting firms based in the United States
RevenueBase identified 2,339 company matches for energy efficiency consulting firms associated with the United States as of September 2026 and tracks 32,555 professional contacts across them, including 14,308 with verified work emails and 14,156 with mobile numbers. New York is the largest hub.
This list covers company matches for energy efficiency consulting firms associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 2, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest energy efficiency consulting firms based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,475 contacts → | ||||
Exact match “Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 2 | 838 contacts → | ||||
Exact match “Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 3 | 806 contacts → | ||||
Exact match “Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 4 | 724 contacts → | ||||
Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 5 | 685 contacts → | ||||
Exact match “Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 6 | 484 contacts → | ||||
Exact match “NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 7 | 451 contacts → | ||||
Exact match “SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 8 | 382 contacts → | ||||
Exact match “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 9 | 370 contacts → | ||||
Exact match “P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 10 | 354 contacts → | ||||
Exact match “Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 11 | 290 contacts → | ||||
Exact match “At Cascade Energy, we believe in better.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 12 | 254 contacts → | ||||
Exact match “CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 13 | 233 contacts → | ||||
Exact match “Lime Energy is building a new energy future.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 14 | 231 contacts → | ||||
Exact match “At Mantis Innovation, our experts provide data-driven, consultative services designed to optimize your facility, sustainability, and energy management strategies, while ultimately…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 15 | 212 contacts → | ||||
Exact match “Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 16 | 211 contacts → | ||||
Exact match “PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 17 | 197 contacts → | ||||
Exact match “EMC manages and scales turnkey energy efficiency solutions for Fortune 500 clients across their North American portfolios.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 18 | 187 contacts → | ||||
Exact match “At Cenergistic, energy conservation starts with people.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 19 | 170 contacts → | ||||
Exact match “Headquartered in Harrisburg, Pennsylvania, McClure Company is one of the mid-Atlantic's largest, fully integrated mechanical construction, engineering, maintenance and energy…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 20 | 157 contacts → | ||||
Exact match “Energy Network has four areas of expertise, each of which is focused on reducing operational expenses and at the same time augment our clients’ sustainability objectives.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 21 | 151 contacts → | ||||
Exact match “RISE is a pioneer in the delivery of turnkey energy-efficiency services for residential, commercial and industrial facilities.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 22 | 134 contacts → | ||||
Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 23 | 124 contacts → | ||||
Exact match “Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 24 | 115 contacts → | ||||
Exact match “We make sustainable happen.” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
| 25 | 102 contacts → | ||||
Exact match “Qualus is a leading pure-play power services firm and innovator at the forefront of the energy transition and transformation, with differentiated capabilities across grid…” Recorded in the RevenueBase company graph · Sep 2, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “energy efficiency consulting firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 2,339 energy efficiency consulting firms based in the United States
See the full list, filter by size, metro and specialty, and access 14,308 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Energy efficiency consulting firms based in the United States at a glance
As of Sep 2, 2026Companies by employee count
How this list was built
The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Company records associated with the United States whose business descriptions match “energy efficiency consulting firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
- RevenueBase SmartSearch
- Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
- Public preview
- The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
- Match quality
- RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every displayed company carries at least one verified work email. RevenueBase tracks 14,308 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 2, 2026. Lists refresh periodically as the graph is re-checked.
- Record context
- Company records and descriptions can change. Check the company's website for its current services and locations.
Energy efficiency consulting firms by metro
- Energy efficiency consulting firms in New York91
- Energy efficiency consulting firms in Houston69
- Energy efficiency consulting firms in Chicago38
- Energy efficiency consulting firms in Atlanta37
- Energy efficiency consulting firms in Austin37
- Energy efficiency consulting firms in Denver36
- Energy efficiency consulting firms in Dallas33
- Energy efficiency consulting firms in Portland30
Frequently asked
What is RevenueBase SmartSearch?
RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy efficiency consulting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many energy efficiency consulting firms are there based in the United States?
RevenueBase identified 2,339 company matches for energy efficiency consulting firms associated with the United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.
What is the largest company on this list?
Ameresco tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most energy efficiency consulting firms?
New York leads with 91 company records, followed by Houston (69) and Chicago (38).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 14,308 professional contacts with verified work emails tracked across these 2,339 companies; direct dials are available where recorded.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 2, 2026.
Ready to reach these companies? Verified emails and direct dials for all 2,339 energy efficiency consulting firms based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Energy efficiency consulting firms by geography
- Energy efficiency consulting firms based in France
- Energy efficiency consulting firms based in Spain
- Energy efficiency consulting firms based in Germany
- Energy efficiency consulting firms based in Italy
- Energy efficiency consulting firms based in the United Kingdom
- Energy efficiency consulting firms based in Brazil
- Energy efficiency consulting firms based in the Netherlands
- Energy efficiency consulting firms based in Canada
- Energy efficiency consulting firms based in Australia
- Energy efficiency consulting firms based in Switzerland
- Energy efficiency consulting firms based in Belgium
- Energy efficiency consulting firms based in Sweden
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Energy efficiency consulting firms based in France
- Energy efficiency consulting firms based in Spain
- Energy efficiency consulting firms based in Germany
- Energy efficiency consulting firms based in Italy
- Energy efficiency consulting firms based in the United Kingdom
- Energy efficiency consulting firms based in Brazil
Company intelligence · public preview
Top 25 energy efficiency consulting firms based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 2,339 matching company records for energy efficiency consulting firms based in the United States, with 32,555 tracked contacts and 14,308 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 2, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 energy efficiency consulting firms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Amerescoameresco.comHQ: HQ not recorded; location: Framingham, MA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Framingham, MA, United States | 1,001-5,000 | Exact match | 1,475 contacts → |
“Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  Willdanwilldan.comHQ: HQ not recorded; location: Anaheim, CA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Anaheim, CA, United States | 1,001-5,000 | Exact match | 838 contacts → |
“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Syska Hennessy Groupsyska.comHQ: HQ not recorded; location: Jacksonville, FL, United StatesReported employees: 501-1,000 | HQ not recorded; location: Jacksonville, FL, United States | 501-1,000 | Exact match | 806 contacts → |
“Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Resource Innovationsresource-innovations.comHQ: HQ not recorded; location: Chandler, AZ, United StatesReported employees: 501-1,000 | HQ not recorded; location: Chandler, AZ, United States | 501-1,000 | Exact match | 724 contacts → |
“Resource Innovations (RI) is an energy transformation firm.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Albireo Energyalbireoenergy.comHQ: HQ not recorded; location: New York, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: New York, United States | 1,001-5,000 | Exact match | 685 contacts → |
“Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Noresconoresco.comHQ: HQ not recorded; location: Westminster, CO, United StatesReported employees: 201-500 | HQ not recorded; location: Westminster, CO, United States | 201-500 | Exact match | 484 contacts → |
“NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Sitelogiqsitelogiq.comHQ: HQ not recorded; location: Minneapolis, MN, United StatesReported employees: 501-1,000 | HQ not recorded; location: Minneapolis, MN, United States | 501-1,000 | Exact match | 451 contacts → |
“SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  TRIOtrioadvisory.comHQ: HQ not recorded; location: Mclean, VA, United StatesReported employees: 201-500 | HQ not recorded; location: Mclean, VA, United States | 201-500 | Exact match | 382 contacts → |
“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  P2sp2sinc.comHQ: HQ not recorded; location: Irvine, CA, United StatesReported employees: 201-500 | HQ not recorded; location: Irvine, CA, United States | 201-500 | Exact match | 370 contacts → |
“P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Wendel Companieswendelcompanies.comHQ: HQ not recorded; location: Middletown, CT, United StatesReported employees: 201-500 | HQ not recorded; location: Middletown, CT, United States | 201-500 | Exact match | 354 contacts → |
“Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Cascade Energycascadeenergy.comHQ: HQ not recorded; location: Burlington, VT, United StatesReported employees: 201-500 | HQ not recorded; location: Burlington, VT, United States | 201-500 | Exact match | 290 contacts → |
“At Cascade Energy, we believe in better.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  CMC Energy Servicescmcenergy.comHQ: HQ not recorded; location: Yalesville, CT, United StatesReported employees: 201-500 | HQ not recorded; location: Yalesville, CT, United States | 201-500 | Exact match | 254 contacts → |
“CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Lime Energylime-energy.comHQ: HQ not recorded; location: Newark, NJ, United StatesReported employees: 201-500 | HQ not recorded; location: Newark, NJ, United States | 201-500 | Exact match | 233 contacts → |
“Lime Energy is building a new energy future.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Mantis Innovationmantisinnovation.comHQ: HQ not recorded; location: Waco, TX, United StatesReported employees: 201-500 | HQ not recorded; location: Waco, TX, United States | 201-500 | Exact match | 231 contacts → |
“At Mantis Innovation, our experts provide data-driven, consultative services designed to optimize your facility, sustainability, and energy management strategies, while ultimately…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  Dalkia Energy Solutionsdalkiasolutions.comHQ: HQ not recorded; location: Beverly, MA, United StatesReported employees: 201-500 | HQ not recorded; location: Beverly, MA, United States | 201-500 | Exact match | 212 contacts → |
“Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  PEGpegenv.comHQ: HQ not recorded; location: Fairfax, VA, United StatesReported employees: 201-500 | HQ not recorded; location: Fairfax, VA, United States | 201-500 | Exact match | 211 contacts → |
“PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Energy Management Collaborative EMCemcllc.comHQ: HQ not recorded; location: Minneapolis, MN, United StatesReported employees: 201-500 | HQ not recorded; location: Minneapolis, MN, United States | 201-500 | Exact match | 197 contacts → |
“EMC manages and scales turnkey energy efficiency solutions for Fortune 500 clients across their North American portfolios.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Cenergisticcenergistic.comHQ: HQ not recorded; location: Dallas, TX, United StatesReported employees: 201-500 | HQ not recorded; location: Dallas, TX, United States | 201-500 | Exact match | 187 contacts → |
“At Cenergistic, energy conservation starts with people.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Mcclure Companymcclureco.comHQ: HQ not recorded; location: Wilkes-Barre, PA, United StatesReported employees: 201-500 | HQ not recorded; location: Wilkes-Barre, PA, United States | 201-500 | Exact match | 170 contacts → |
“Headquartered in Harrisburg, Pennsylvania, McClure Company is one of the mid-Atlantic's largest, fully integrated mechanical construction, engineering, maintenance and energy…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Energy Networkenergynetwork.netHQ: HQ not recorded; location: Elkhorn, NE, United StatesReported employees: 201-500 | HQ not recorded; location: Elkhorn, NE, United States | 201-500 | Exact match | 157 contacts → |
“Energy Network has four areas of expertise, each of which is focused on reducing operational expenses and at the same time augment our clients’ sustainability objectives.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  RISEriseengineering.comHQ: HQ not recorded; location: Cranston, RI, United StatesReported employees: 201-500 | HQ not recorded; location: Cranston, RI, United States | 201-500 | Exact match | 151 contacts → |
“RISE is a pioneer in the delivery of turnkey energy-efficiency services for residential, commercial and industrial facilities.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Four Seasons Environmental, INCfseinc.netHQ: HQ not recorded; location: Monroe, OH, United StatesReported employees: 201-500 | HQ not recorded; location: Monroe, OH, United States | 201-500 | Exact match | 134 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 |  Synergy Companiessynergycompanies.comHQ: HQ not recorded; location: Fresno, CA, United StatesReported employees: 501-1,000 | HQ not recorded; location: Fresno, CA, United States | 501-1,000 | Exact match | 124 contacts → |
“Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Envocoreenvocore.comHQ: HQ not recorded; location: Gambrills, MD, United StatesReported employees: 201-500 | HQ not recorded; location: Gambrills, MD, United States | 201-500 | Exact match | 115 contacts → |
“We make sustainable happen.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Adm, A Qualus Companyqualuscorp.comHQ: HQ not recorded; location: Reno, NV, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Reno, NV, United States | 1,001-5,000 | Exact match | 102 contacts → |
“Qualus is a leading pure-play power services firm and innovator at the forefront of the energy transition and transformation, with differentiated capabilities across grid…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 2,339 company matches
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Energy efficiency consulting firms: dataset insights
September 2, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
2,332 records in the displayed employee bands.
7 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 2, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Energy efficiency consulting firms by metro
- Energy efficiency consulting firms in New York91
- Energy efficiency consulting firms in Houston69
- Energy efficiency consulting firms in Chicago38
- Energy efficiency consulting firms in Atlanta37
- Energy efficiency consulting firms in Austin37
- Energy efficiency consulting firms in Denver36
- Energy efficiency consulting firms in Dallas33
- Energy efficiency consulting firms in Portland30
Questions about this company list
What does Exact match mean for energy efficiency consulting firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many energy efficiency consulting firms did RevenueBase find based in the United States?
The saved snapshot records 2,339 matching company records, 32,555 tracked contacts and 14,308 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 2, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Energy efficiency consulting firms by geography
- Energy efficiency consulting firms based in France
- Energy efficiency consulting firms based in Spain
- Energy efficiency consulting firms based in Germany
- Energy efficiency consulting firms based in Italy
- Energy efficiency consulting firms based in the United Kingdom
- Energy efficiency consulting firms based in Brazil
- Energy efficiency consulting firms based in the Netherlands
- Energy efficiency consulting firms based in Canada
- Energy efficiency consulting firms based in Australia
- Energy efficiency consulting firms based in Switzerland
- Energy efficiency consulting firms based in Belgium
- Energy efficiency consulting firms based in Sweden
Cite this list
RevenueBase Data Team. Top 25 energy efficiency consulting firms based in the United States. Snapshot: September 2, 2026. https://revenuebase.ai/companies/energy-efficiency-consulting-firms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Energy efficiency consulting firms based in France
- Energy efficiency consulting firms based in Spain
- Energy efficiency consulting firms based in Germany
- Energy efficiency consulting firms based in Italy
- Energy efficiency consulting firms based in the United Kingdom
- Energy efficiency consulting firms based in Brazil
Company intelligence · public preview
Top 25 energy efficiency consulting firms based in the United States
RevenueBase records 2,339 matching company records for energy efficiency consulting firms based in the United States, with 32,555 tracked contacts and 14,308 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 2, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 energy efficiency consulting firms based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Amerescoameresco.com HQ: HQ not recorded; location: Framingham, MA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Framingham, MA, United States | 1,001-5,000 | Exact match | 1,475 contacts → |
“Ameresco, Inc.(NYSE:AMRC) is a leading energy infrastructure solutions provider dedicated to helping customers reduce costs, enhance resilience, and decarbonize to net zero in the…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Willdanwilldan.com HQ: HQ not recorded; location: Anaheim, CA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Anaheim, CA, United States | 1,001-5,000 | Exact match | 838 contacts → |
“Willdan (NASDAQ: WLDN) provides professional consulting and technical services to utilities, public agencies and private industry throughout the United States.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Syska Hennessy Groupsyska.com HQ: HQ not recorded; location: Jacksonville, FL, United StatesReported employees: 501-1,000 | HQ not recorded; location: Jacksonville, FL, United States | 501-1,000 | Exact match | 806 contacts → |
“Consult Engineer Commission At Syska Hennessy Group, we create exceptional environments.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Resource Innovationsresource-innovations.com HQ: HQ not recorded; location: Chandler, AZ, United StatesReported employees: 501-1,000 | HQ not recorded; location: Chandler, AZ, United States | 501-1,000 | Exact match | 724 contacts → |
“Resource Innovations (RI) is an energy transformation firm.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Albireo Energyalbireoenergy.com HQ: HQ not recorded; location: New York, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: New York, United States | 1,001-5,000 | Exact match | 685 contacts → |
“Albireo Energy is a leading independent building controls and energy services provider recognized by customers for creating intelligent, high-performance buildings.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Noresconoresco.com HQ: HQ not recorded; location: Westminster, CO, United StatesReported employees: 201-500 | HQ not recorded; location: Westminster, CO, United States | 201-500 | Exact match | 484 contacts → |
“NORESCO, a part of Carrier Global Corporation, helps customers modernize aging building systems and upgrade energy and water infrastructure to meet evolving demands.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Sitelogiqsitelogiq.com HQ: HQ not recorded; location: Minneapolis, MN, United StatesReported employees: 501-1,000 | HQ not recorded; location: Minneapolis, MN, United States | 501-1,000 | Exact match | 451 contacts → |
“SitelogIQ provides design, engineering, and construction management services that help organizations nationwide modernize their facilities and infrastructure.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | TRIOtrioadvisory.com HQ: HQ not recorded; location: Mclean, VA, United StatesReported employees: 201-500 | HQ not recorded; location: Mclean, VA, United States | 201-500 | Exact match | 382 contacts → |
“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | P2sp2sinc.com HQ: HQ not recorded; location: Irvine, CA, United StatesReported employees: 201-500 | HQ not recorded; location: Irvine, CA, United States | 201-500 | Exact match | 370 contacts → |
“P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Wendel Companieswendelcompanies.com HQ: HQ not recorded; location: Middletown, CT, United StatesReported employees: 201-500 | HQ not recorded; location: Middletown, CT, United States | 201-500 | Exact match | 354 contacts → |
“Wendel is an Architecture, Engineering, Energy Efficiency, and Construction Management Firm that delivers customized solutions and turnkey projects in innovative ways.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Cascade Energycascadeenergy.com HQ: HQ not recorded; location: Burlington, VT, United StatesReported employees: 201-500 | HQ not recorded; location: Burlington, VT, United States | 201-500 | Exact match | 290 contacts → |
“At Cascade Energy, we believe in better.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | CMC Energy Servicescmcenergy.com HQ: HQ not recorded; location: Yalesville, CT, United StatesReported employees: 201-500 | HQ not recorded; location: Yalesville, CT, United States | 201-500 | Exact match | 254 contacts → |
“CMC Energy Services is a woman-owned full-service energy efficiency company with nearly 50 years of experience delivering value-based energy conservation services.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Lime Energylime-energy.com HQ: HQ not recorded; location: Newark, NJ, United StatesReported employees: 201-500 | HQ not recorded; location: Newark, NJ, United States | 201-500 | Exact match | 233 contacts → |
“Lime Energy is building a new energy future.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Mantis Innovationmantisinnovation.com HQ: HQ not recorded; location: Waco, TX, United StatesReported employees: 201-500 | HQ not recorded; location: Waco, TX, United States | 201-500 | Exact match | 231 contacts → |
“At Mantis Innovation, our experts provide data-driven, consultative services designed to optimize your facility, sustainability, and energy management strategies, while ultimately…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | Dalkia Energy Solutionsdalkiasolutions.com HQ: HQ not recorded; location: Beverly, MA, United StatesReported employees: 201-500 | HQ not recorded; location: Beverly, MA, United States | 201-500 | Exact match | 212 contacts → |
“Dalkia Energy Solutions, a subsidiary of the EDF (Électricité de France) Group, is a national leader in energy efficiency and sustainability for commercial, industrial, and…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | PEGpegenv.com HQ: HQ not recorded; location: Fairfax, VA, United StatesReported employees: 201-500 | HQ not recorded; location: Fairfax, VA, United States | 201-500 | Exact match | 211 contacts → |
“PEG presents a comprehensive capacity for the evaluation and understanding of a broad base of energy and environmental sustainability related programs, policies and initiatives.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Energy Management Collaborative EMCemcllc.com HQ: HQ not recorded; location: Minneapolis, MN, United StatesReported employees: 201-500 | HQ not recorded; location: Minneapolis, MN, United States | 201-500 | Exact match | 197 contacts → |
“EMC manages and scales turnkey energy efficiency solutions for Fortune 500 clients across their North American portfolios.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Cenergisticcenergistic.com HQ: HQ not recorded; location: Dallas, TX, United StatesReported employees: 201-500 | HQ not recorded; location: Dallas, TX, United States | 201-500 | Exact match | 187 contacts → |
“At Cenergistic, energy conservation starts with people.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Mcclure Companymcclureco.com HQ: HQ not recorded; location: Wilkes-Barre, PA, United StatesReported employees: 201-500 | HQ not recorded; location: Wilkes-Barre, PA, United States | 201-500 | Exact match | 170 contacts → |
“Headquartered in Harrisburg, Pennsylvania, McClure Company is one of the mid-Atlantic's largest, fully integrated mechanical construction, engineering, maintenance and energy…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Energy Networkenergynetwork.net HQ: HQ not recorded; location: Elkhorn, NE, United StatesReported employees: 201-500 | HQ not recorded; location: Elkhorn, NE, United States | 201-500 | Exact match | 157 contacts → |
“Energy Network has four areas of expertise, each of which is focused on reducing operational expenses and at the same time augment our clients’ sustainability objectives.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | RISEriseengineering.com HQ: HQ not recorded; location: Cranston, RI, United StatesReported employees: 201-500 | HQ not recorded; location: Cranston, RI, United States | 201-500 | Exact match | 151 contacts → |
“RISE is a pioneer in the delivery of turnkey energy-efficiency services for residential, commercial and industrial facilities.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Four Seasons Environmental, INCfseinc.net HQ: HQ not recorded; location: Monroe, OH, United StatesReported employees: 201-500 | HQ not recorded; location: Monroe, OH, United States | 201-500 | Exact match | 134 contacts → |
No recorded description excerpt is available for this public record. | |||||
| 23 | Synergy Companiessynergycompanies.com HQ: HQ not recorded; location: Fresno, CA, United StatesReported employees: 501-1,000 | HQ not recorded; location: Fresno, CA, United States | 501-1,000 | Exact match | 124 contacts → |
“Synergy Companies is the largest energy services companies in California and provides a comprehensive approach to energy efficiency and environmental solutions in both the…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Envocoreenvocore.com HQ: HQ not recorded; location: Gambrills, MD, United StatesReported employees: 201-500 | HQ not recorded; location: Gambrills, MD, United States | 201-500 | Exact match | 115 contacts → |
“We make sustainable happen.” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Adm, A Qualus Companyqualuscorp.com HQ: HQ not recorded; location: Reno, NV, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Reno, NV, United States | 1,001-5,000 | Exact match | 102 contacts → |
“Qualus is a leading pure-play power services firm and innovator at the forefront of the energy transition and transformation, with differentiated capabilities across grid…” Recorded description excerpt · September 2, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Energy efficiency consulting firms: dataset insights
September 2, 2026These summaries describe recorded coverage in this saved dataset. Coverage describes records in RevenueBase, rather than a census of every business in this market.
Reported company sizes
2,332 records in the displayed employee bands.
7 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
Coverage describes records in RevenueBase, rather than a census of every business in this market.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 2, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Energy efficiency consulting firms by metro
- Energy efficiency consulting firms in New York91
- Energy efficiency consulting firms in Houston69
- Energy efficiency consulting firms in Chicago38
- Energy efficiency consulting firms in Atlanta37
- Energy efficiency consulting firms in Austin37
- Energy efficiency consulting firms in Denver36
- Energy efficiency consulting firms in Dallas33
- Energy efficiency consulting firms in Portland30
Questions about this company list
What does Exact match mean for energy efficiency consulting firms?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many energy efficiency consulting firms did RevenueBase find based in the United States?
The saved snapshot records 2,339 matching company records, 32,555 tracked contacts and 14,308 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 2, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Energy efficiency consulting firms by geography
- Energy efficiency consulting firms based in France
- Energy efficiency consulting firms based in Spain
- Energy efficiency consulting firms based in Germany
- Energy efficiency consulting firms based in Italy
- Energy efficiency consulting firms based in the United Kingdom
- Energy efficiency consulting firms based in Brazil
- Energy efficiency consulting firms based in the Netherlands
- Energy efficiency consulting firms based in Canada
- Energy efficiency consulting firms based in Australia
- Energy efficiency consulting firms based in Switzerland
- Energy efficiency consulting firms based in Belgium
- Energy efficiency consulting firms based in Sweden
Cite this list
RevenueBase Data Team. Top 25 energy efficiency consulting firms based in the United States. Snapshot: September 2, 2026. https://revenuebase.ai/companies/energy-efficiency-consulting-firms/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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- Energy efficiency consulting firms based in France
- Energy efficiency consulting firms based in Spain
- Energy efficiency consulting firms based in Germany
- Energy efficiency consulting firms based in Italy
- Energy efficiency consulting firms based in the United Kingdom
- Energy efficiency consulting firms based in Brazil