Company lists · Data refreshed September 2026
Top 25 Clean energy consultancies based in the United States
RevenueBase identified 4,102 company matches for clean energy consultancies associated with the United States as of September 2026 and tracks 62,858 professional contacts across them, including 27,277 with verified work emails. Houston is the largest hub.
This list covers company matches for clean energy consultancies 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 21, 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 clean energy consultancies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,156 contacts → | ||||
Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 2 | 2,741 contacts → | ||||
Exact match “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 3 | 2,213 contacts → | ||||
Exact match “We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 4 | 2,121 contacts → | ||||
Exact match “CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 5 | 1,661 contacts → | ||||
Exact match “At Westwood, our purpose is to create a better world for people through our work.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 6 | 1,383 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 21, 2026 · View company records in RevenueBase | |||||
| 7 | 1,145 contacts → | ||||
Exact match “OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 8 | 851 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 21, 2026 · View company records in RevenueBase | |||||
| 9 | 772 contacts → | ||||
Exact match “Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 10 | 733 contacts → | ||||
Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 11 | 715 contacts → | ||||
Exact match “For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 12 | 624 contacts → | ||||
Exact match “DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 13 | 470 contacts → | ||||
Exact match “We’re helping companies in every industry, in every corner of the globe make real progress.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 14 | 434 contacts → | ||||
Exact match “Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 15 | 383 contacts → | ||||
Exact match “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 16 | 375 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 21, 2026 · View company records in RevenueBase | |||||
| 17 | 365 contacts → | ||||
Exact match “Manhard Consulting has joined Atwell, a national consulting, engineering, and construction services firm with 2,100 technical professionals across the country.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 18 | 358 contacts → | ||||
Exact match “TAKKION is Moving Energy Forward.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 19 | 355 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 21, 2026 · View company records in RevenueBase | |||||
| 20 | 336 contacts → | ||||
Exact match “National Utility Service, Inc.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 21 | 330 contacts → | ||||
Exact match “Customized Energy Solutions is at the forefront of competitive energy markets.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 22 | 324 contacts → | ||||
Exact match “U.S.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 23 | 305 contacts → | ||||
Exact match “Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 24 | 305 contacts → | ||||
Exact match “We provide expert engineering and consulting services that enable a more reliable and resilient power system.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase | |||||
| 25 | 305 contacts → | ||||
Exact match “CSRS was acquired by Westwood Professional Services on June 30, 2025.” Recorded in the RevenueBase company graph · Sep 21, 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 “clean energy consultancies”. 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 4,102 clean energy consultancies based in the United States
See the full list, filter by size, metro and specialty, and access 27,277 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Clean energy consultancies based in the United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,102 companies.
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 “clean energy consultancies” 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 27,277 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 21, 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.
Clean energy consultancies by metro
- Clean energy consultancies in Houston199
- Clean energy consultancies in New York188
- Clean energy consultancies in Washington89
- Clean energy consultancies in Chicago81
- Clean energy consultancies in Denver75
- Clean energy consultancies in Austin62
- Clean energy consultancies in Los Angeles61
- Clean energy consultancies in Atlanta57
- Clean energy consultancies in Boston56
- Clean energy consultancies in Dallas54
- Clean energy consultancies in Portland51
- Clean energy consultancies in San Francisco51
- Clean energy consultancies in San Diego48
- Clean energy consultancies in Miami42
- Clean energy consultancies in Las Vegas35
- Clean energy consultancies in Seattle33
- Clean energy consultancies in Phoenix30
- Clean energy consultancies in Charlotte29
- Clean energy consultancies in Philadelphia28
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 “clean energy consultancies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many clean energy consultancies are there based in the United States?
RevenueBase identified 4,102 company matches for clean energy consultancies 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?
Sargent & Lundy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most clean energy consultancies?
Houston leads with 199 company records, followed by New York (188) and Washington (89).
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 27,277 professional contacts with verified work emails tracked across these 4,102 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 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 4,102 clean energy consultancies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Clean energy consultancies by geography
- Clean energy consultancies based in Adelaide, Australia
- Clean energy consultancies based in Brisbane, Australia
- Clean energy consultancies based in Melbourne, Australia
- Clean energy consultancies based in Perth, Australia
- Clean energy consultancies based in Sydney, Australia
- Clean energy consultancies based in Belo Horizonte, Brazil
- Clean energy consultancies based in Campinas, Brazil
- Clean energy consultancies based in Curitiba, Brazil
- Clean energy consultancies based in Fortaleza, Brazil
- Clean energy consultancies based in Natal, Brazil
- Clean energy consultancies based in Porto Alegre, Brazil
- Clean energy consultancies based in Recife, Brazil
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
- Clean energy consultancies based in Adelaide, Australia
- Clean energy consultancies based in Brisbane, Australia
- Clean energy consultancies based in Melbourne, Australia
- Clean energy consultancies based in Perth, Australia
- Clean energy consultancies based in Sydney, Australia
- Clean energy consultancies based in Belo Horizonte, Brazil
Company intelligence · public preview
Top 25 clean energy consultancies 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 4,102 matching company records for clean energy consultancies based in the United States, with 62,858 tracked contacts and 27,277 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 21, 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 clean energy consultancies 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 |  Sargent & Lundysargentlundy.comHQ: Chicago, WY, United StatesReported employees: 1,001-5,000 | Chicago, WY, United States | 1,001-5,000 | Exact match | 4,156 contacts → |
“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  FTIfaithtechinc.comHQ: Menasha, WI, United StatesReported employees: 1,001-5,000 | Menasha, WI, United States | 1,001-5,000 | Exact match | 2,741 contacts → |
“Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Mckinstrymckinstry.comHQ: Seattle, WA, United StatesReported employees: 1,001-5,000 | Seattle, WA, United States | 1,001-5,000 | Exact match | 2,213 contacts → |
“We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Clearesultclearesult.comHQ: Austin, TX, United StatesReported employees: 1,001-5,000 | Austin, TX, United States | 1,001-5,000 | Exact match | 2,121 contacts → |
“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Westwood Professional Serviceswestwoodps.comHQ: Plano, TX, United StatesReported employees: 1,001-5,000 | Plano, TX, United States | 1,001-5,000 | Exact match | 1,661 contacts → |
“At Westwood, our purpose is to create a better world for people through our work.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  Amerescoameresco.comHQ: Framingham, MA, United StatesReported employees: 1,001-5,000 | Framingham, MA, United States | 1,001-5,000 | Exact match | 1,383 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 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  OLAola-austin.comHQ: Austin, TX, United StatesReported employees: Not recorded | Austin, TX, United States | Not recorded | Exact match | 1,145 contacts → |
“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Willdanwilldan.comHQ: Anaheim, CA, United StatesReported employees: 1,001-5,000 | Anaheim, CA, United States | 1,001-5,000 | Exact match | 851 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 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Energy Solutionsenergy-solution.comHQ: Oakland, CA, United StatesReported employees: 201-500 | Oakland, CA, United States | 201-500 | Exact match | 772 contacts → |
“Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Resource Innovationsresource-innovations.comHQ: Half Moon Bay, CA, United StatesReported employees: 501-1,000 | Half Moon Bay, CA, United States | 501-1,000 | Exact match | 733 contacts → |
“Resource Innovations (RI) is an energy transformation firm.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Capco Energycapco.comHQ: Houston, TX, United StatesReported employees: 1,001-5,000 | Houston, TX, United States | 1,001-5,000 | Exact match | 715 contacts → |
“For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Depcom Power, INCdepcompower.comHQ: Scottsdale, AZ, United StatesReported employees: 1,001-5,000 | Scottsdale, AZ, United States | 1,001-5,000 | Exact match | 624 contacts → |
“DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Dupont Water Solutionsdupont.comHQ: Wilmington, DE, United StatesReported employees: 10001+ | Wilmington, DE, United States | 10001+ | Exact match | 470 contacts → |
“We’re helping companies in every industry, in every corner of the globe make real progress.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Synergy Consulting, INCsynergyconsultingifa.comHQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 434 contacts → |
“Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  TRIOtrioadvisory.comHQ: Irvine, CA, United StatesReported employees: 201-500 | Irvine, CA, United States | 201-500 | Exact match | 383 contacts → |
“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  P2sp2sinc.comHQ: Long Beach, CA, United StatesReported employees: 201-500 | Long Beach, CA, United States | 201-500 | Exact match | 375 contacts → |
“P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Manhard Consultingmanhard.comHQ: Lincolnshire, IL, United StatesReported employees: 201-500 | Lincolnshire, IL, United States | 201-500 | Exact match | 365 contacts → |
“Manhard Consulting has joined Atwell, a national consulting, engineering, and construction services firm with 2,100 technical professionals across the country.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Takkiontakkion.comHQ: Evansville, WY, United StatesReported employees: 1,001-5,000 | Evansville, WY, United States | 1,001-5,000 | Exact match | 358 contacts → |
“TAKKION is Moving Energy Forward.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Wendel Companieswendelcompanies.comHQ: Williamsville, NY, United StatesReported employees: 201-500 | Williamsville, NY, United States | 201-500 | Exact match | 355 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 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  NUS Consulting Groupnusconsulting.comHQ: Park Ridge, NJ, United StatesReported employees: 201-500 | Park Ridge, NJ, United States | 201-500 | Exact match | 336 contacts → |
“National Utility Service, Inc.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Customized Energy Solutionsces-ltd.comHQ: Philadelphia, PA, United StatesReported employees: 201-500 | Philadelphia, PA, United States | 201-500 | Exact match | 330 contacts → |
“Customized Energy Solutions is at the forefront of competitive energy markets.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  U.S. Energyus-energy.comHQ: Appleton, WI, United StatesReported employees: 1,001-5,000 | Appleton, WI, United States | 1,001-5,000 | Exact match | 324 contacts → |
“U.S.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | HQ: Gainesville, FL, United StatesReported employees: 201-500 | Gainesville, FL, United States | 201-500 | Exact match | 305 contacts → |
“Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  Commonwealth Associates, INCcommonwealthassociates.comHQ: Jackson, MI, United StatesReported employees: 201-500 | Jackson, MI, United States | 201-500 | Exact match | 305 contacts → |
“We provide expert engineering and consulting services that enable a more reliable and resilient power system.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Csrs, A Westwood Companycsrsinc.comHQ: Baton Rouge, LA, United StatesReported employees: 51-200 | Baton Rouge, LA, United States | 51-200 | Exact match | 305 contacts → |
“CSRS was acquired by Westwood Professional Services on June 30, 2025.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 4,102 company matches
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Clean energy consultancies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
4,094 records in the displayed employee bands.
8 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,102 companies.
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.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
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 21, 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 ↗
Clean energy consultancies by metro
- Clean energy consultancies in Houston199
- Clean energy consultancies in New York188
- Clean energy consultancies in Washington89
- Clean energy consultancies in Chicago81
- Clean energy consultancies in Denver75
- Clean energy consultancies in Austin62
- Clean energy consultancies in Los Angeles61
- Clean energy consultancies in Atlanta57
- Clean energy consultancies in Boston56
- Clean energy consultancies in Dallas54
- Clean energy consultancies in Portland51
- Clean energy consultancies in San Francisco51
- Clean energy consultancies in San Diego48
- Clean energy consultancies in Miami42
- Clean energy consultancies in Las Vegas35
- Clean energy consultancies in Seattle33
- Clean energy consultancies in Phoenix30
- Clean energy consultancies in Charlotte29
- Clean energy consultancies in Philadelphia28
Questions about this company list
What does Exact match mean for clean energy consultancies?
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 clean energy consultancies did RevenueBase find based in the United States?
The saved snapshot records 4,102 matching company records, 62,858 tracked contacts and 27,277 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 21, 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
Clean energy consultancies by geography
- Clean energy consultancies based in Adelaide, Australia
- Clean energy consultancies based in Brisbane, Australia
- Clean energy consultancies based in Melbourne, Australia
- Clean energy consultancies based in Perth, Australia
- Clean energy consultancies based in Sydney, Australia
- Clean energy consultancies based in Belo Horizonte, Brazil
- Clean energy consultancies based in Campinas, Brazil
- Clean energy consultancies based in Curitiba, Brazil
- Clean energy consultancies based in Fortaleza, Brazil
- Clean energy consultancies based in Natal, Brazil
- Clean energy consultancies based in Porto Alegre, Brazil
- Clean energy consultancies based in Recife, Brazil
Cite this list
RevenueBase Data Team. Top 25 clean energy consultancies based in the United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/clean-energy-consultancies/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
- Clean energy consultancies based in Adelaide, Australia
- Clean energy consultancies based in Brisbane, Australia
- Clean energy consultancies based in Melbourne, Australia
- Clean energy consultancies based in Perth, Australia
- Clean energy consultancies based in Sydney, Australia
- Clean energy consultancies based in Belo Horizonte, Brazil
Company intelligence · public preview
Top 25 clean energy consultancies based in the United States
RevenueBase records 4,102 matching company records for clean energy consultancies based in the United States, with 62,858 tracked contacts and 27,277 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 21, 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 clean energy consultancies 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 | Sargent & Lundysargentlundy.com HQ: Chicago, WY, United StatesReported employees: 1,001-5,000 | Chicago, WY, United States | 1,001-5,000 | Exact match | 4,156 contacts → |
“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | FTIfaithtechinc.com HQ: Menasha, WI, United StatesReported employees: 1,001-5,000 | Menasha, WI, United States | 1,001-5,000 | Exact match | 2,741 contacts → |
“Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Mckinstrymckinstry.com HQ: Seattle, WA, United StatesReported employees: 1,001-5,000 | Seattle, WA, United States | 1,001-5,000 | Exact match | 2,213 contacts → |
“We're a national construction and energy services company dedicated to innovating the waste and climate harm out of the built environment.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Clearesultclearesult.com HQ: Austin, TX, United StatesReported employees: 1,001-5,000 | Austin, TX, United States | 1,001-5,000 | Exact match | 2,121 contacts → |
“CLEAResult is the largest provider of energy efficiency, energy transition and energy sustainability services in North America.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Westwood Professional Serviceswestwoodps.com HQ: Plano, TX, United StatesReported employees: 1,001-5,000 | Plano, TX, United States | 1,001-5,000 | Exact match | 1,661 contacts → |
“At Westwood, our purpose is to create a better world for people through our work.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | Amerescoameresco.com HQ: Framingham, MA, United StatesReported employees: 1,001-5,000 | Framingham, MA, United States | 1,001-5,000 | Exact match | 1,383 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 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | OLAola-austin.com HQ: Austin, TX, United StatesReported employees: Not recorded | Austin, TX, United States | Not recorded | Exact match | 1,145 contacts → |
“OLA Sustainability, LLC OLA Sustainability is a consulting firm that focuses on integrating sustainable practices into commercial and multifamily design projects.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Willdanwilldan.com HQ: Anaheim, CA, United StatesReported employees: 1,001-5,000 | Anaheim, CA, United States | 1,001-5,000 | Exact match | 851 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 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Energy Solutionsenergy-solution.com HQ: Oakland, CA, United StatesReported employees: 201-500 | Oakland, CA, United States | 201-500 | Exact match | 772 contacts → |
“Our mission is simple - to combat climate change through market-based, cost-effective energy, carbon, and water management solutions that make big impacts.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Resource Innovationsresource-innovations.com HQ: Half Moon Bay, CA, United StatesReported employees: 501-1,000 | Half Moon Bay, CA, United States | 501-1,000 | Exact match | 733 contacts → |
“Resource Innovations (RI) is an energy transformation firm.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Capco Energycapco.com HQ: Houston, TX, United StatesReported employees: 1,001-5,000 | Houston, TX, United States | 1,001-5,000 | Exact match | 715 contacts → |
“For 25 years Capco’s Energy practice has combined innovative thinking with deep industry knowledge to provide business consulting, digital transformation and technology services…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Depcom Power, INCdepcompower.com HQ: Scottsdale, AZ, United StatesReported employees: 1,001-5,000 | Scottsdale, AZ, United States | 1,001-5,000 | Exact match | 624 contacts → |
“DEPCOM Power, a Koch Engineered Solutions Company, is a leading solar energy solutions partner providing Development Support, Engineering, Procurement & Construction (EPC)…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Dupont Water Solutionsdupont.com HQ: Wilmington, DE, United StatesReported employees: 10001+ | Wilmington, DE, United States | 10001+ | Exact match | 470 contacts → |
“We’re helping companies in every industry, in every corner of the globe make real progress.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Synergy Consulting, INCsynergyconsultingifa.com HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 434 contacts → |
“Synergy Consulting is Global Leader in Financial and Corporate Advisory.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | TRIOtrioadvisory.com HQ: Irvine, CA, United StatesReported employees: 201-500 | Irvine, CA, United States | 201-500 | Exact match | 383 contacts → |
“We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | P2sp2sinc.com HQ: Long Beach, CA, United StatesReported employees: 201-500 | Long Beach, CA, United States | 201-500 | Exact match | 375 contacts → |
“P2S has brought forward-thinking, sustainable engineering solutions to California, the Pacific Northwest, and beyond, for over 30 years.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Manhard Consultingmanhard.com HQ: Lincolnshire, IL, United StatesReported employees: 201-500 | Lincolnshire, IL, United States | 201-500 | Exact match | 365 contacts → |
“Manhard Consulting has joined Atwell, a national consulting, engineering, and construction services firm with 2,100 technical professionals across the country.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Takkiontakkion.com HQ: Evansville, WY, United StatesReported employees: 1,001-5,000 | Evansville, WY, United States | 1,001-5,000 | Exact match | 358 contacts → |
“TAKKION is Moving Energy Forward.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Wendel Companieswendelcompanies.com HQ: Williamsville, NY, United StatesReported employees: 201-500 | Williamsville, NY, United States | 201-500 | Exact match | 355 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 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | NUS Consulting Groupnusconsulting.com HQ: Park Ridge, NJ, United StatesReported employees: 201-500 | Park Ridge, NJ, United States | 201-500 | Exact match | 336 contacts → |
“National Utility Service, Inc.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Customized Energy Solutionsces-ltd.com HQ: Philadelphia, PA, United StatesReported employees: 201-500 | Philadelphia, PA, United States | 201-500 | Exact match | 330 contacts → |
“Customized Energy Solutions is at the forefront of competitive energy markets.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | U.S. Energyus-energy.com HQ: Appleton, WI, United StatesReported employees: 1,001-5,000 | Appleton, WI, United States | 1,001-5,000 | Exact match | 324 contacts → |
“U.S.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | HQ: Gainesville, FL, United StatesReported employees: 201-500 | Gainesville, FL, United States | 201-500 | Exact match | 305 contacts → |
“Environmental Consulting & Technology, Inc.(ECT) is a multi-disciplinary environmental and sustainability consulting firm delivering strategy, permitting, design, and management…” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Commonwealth Associates, INCcommonwealthassociates.com HQ: Jackson, MI, United StatesReported employees: 201-500 | Jackson, MI, United States | 201-500 | Exact match | 305 contacts → |
“We provide expert engineering and consulting services that enable a more reliable and resilient power system.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Csrs, A Westwood Companycsrsinc.com HQ: Baton Rouge, LA, United StatesReported employees: 51-200 | Baton Rouge, LA, United States | 51-200 | Exact match | 305 contacts → |
“CSRS was acquired by Westwood Professional Services on June 30, 2025.” Recorded description excerpt · September 21, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 4,102 company matches
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Clean energy consultancies: dataset insights
September 21, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
4,094 records in the displayed employee bands.
8 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 4,102 companies.
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.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
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 21, 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 ↗
Clean energy consultancies by metro
- Clean energy consultancies in Houston199
- Clean energy consultancies in New York188
- Clean energy consultancies in Washington89
- Clean energy consultancies in Chicago81
- Clean energy consultancies in Denver75
- Clean energy consultancies in Austin62
- Clean energy consultancies in Los Angeles61
- Clean energy consultancies in Atlanta57
- Clean energy consultancies in Boston56
- Clean energy consultancies in Dallas54
- Clean energy consultancies in Portland51
- Clean energy consultancies in San Francisco51
- Clean energy consultancies in San Diego48
- Clean energy consultancies in Miami42
- Clean energy consultancies in Las Vegas35
- Clean energy consultancies in Seattle33
- Clean energy consultancies in Phoenix30
- Clean energy consultancies in Charlotte29
- Clean energy consultancies in Philadelphia28
Questions about this company list
What does Exact match mean for clean energy consultancies?
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 clean energy consultancies did RevenueBase find based in the United States?
The saved snapshot records 4,102 matching company records, 62,858 tracked contacts and 27,277 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 21, 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
Clean energy consultancies by geography
- Clean energy consultancies based in Adelaide, Australia
- Clean energy consultancies based in Brisbane, Australia
- Clean energy consultancies based in Melbourne, Australia
- Clean energy consultancies based in Perth, Australia
- Clean energy consultancies based in Sydney, Australia
- Clean energy consultancies based in Belo Horizonte, Brazil
- Clean energy consultancies based in Campinas, Brazil
- Clean energy consultancies based in Curitiba, Brazil
- Clean energy consultancies based in Fortaleza, Brazil
- Clean energy consultancies based in Natal, Brazil
- Clean energy consultancies based in Porto Alegre, Brazil
- Clean energy consultancies based in Recife, Brazil
Cite this list
RevenueBase Data Team. Top 25 clean energy consultancies based in the United States. Snapshot: September 21, 2026. https://revenuebase.ai/companies/clean-energy-consultancies/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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