Company lists · Data refreshed August 2026
Top 25 Clean energy consultancy companies based in the United States
RevenueBase identified 4,153 company matches for clean energy consultancy companies associated with the United States as of August 2026 and tracks 68,689 professional contacts across them, including 30,790 with verified work emails and 29,271 with mobile numbers. Houston is the largest hub.
This list covers company matches for clean energy consultancy companies 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 August 31, 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 consultancy companies based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 4,145 contacts → | ||||
Exact match “Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 2 | 2,712 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 3 | 2,136 contacts → | ||||
Exact match “Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 4 | 1,631 contacts → | ||||
Exact match “At Westwood, our purpose is to create a better world for people through our work.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 5 | 1,618 contacts → | ||||
Exact match “Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 6 | 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 7 | 1,407 contacts → | ||||
Exact match “We are officially known as Davey Resource Group Inc, but we are more likely to come up in conversation around a successful project we've completed for a client or a capability we…” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 8 | 1,098 contacts → | ||||
Exact match “Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 9 | 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 10 | 768 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 11 | 724 contacts → | ||||
Exact match “Resource Innovations (RI) is an energy transformation firm.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 12 | 682 contacts → | ||||
Exact match “INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 13 | 638 contacts → | ||||
Exact match “Tighe & Bond is the Northeast’s leading engineering, environmental, planning, and design consulting firm.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 14 | 623 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 15 | 527 contacts → | ||||
Exact match “As a global energy consultancy, we unite our unique and diverse people to share knowledge, innovate and inspire change within the energy industry.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 16 | 505 contacts → | ||||
Exact match “Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 17 | 499 contacts → | ||||
Exact match “HGA is a leading engineering, consulting, and program management company that has been delivering innovative and sustainable solutions to our clients for over 29 years.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 18 | 382 contacts → | ||||
Exact match “We are Trio – built from Edison Energy, Alfa Energy, and Altenex Energy.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 19 | 376 contacts → | ||||
Exact match “Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 20 | 373 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 21 | 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 22 | 360 contacts → | ||||
Exact match “TAKKION is Moving Energy Forward.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 23 | 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 · Aug 31, 2026 · View company records in RevenueBase | |||||
| 24 | 327 contacts → | ||||
Exact match “U.S.” Recorded in the RevenueBase company graph · Aug 31, 2026 · View company records in RevenueBase | |||||
| 25 | 325 contacts → | ||||
Exact match “3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Recorded in the RevenueBase company graph · Aug 31, 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 consultancy companies”. 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 4,153 clean energy consultancy companies based in the United States
See the full list, filter by size, metro and specialty, and access 30,790 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Clean energy consultancy companies based in the United States at a glance
As of Aug 31, 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 “clean energy consultancy companies” 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 30,790 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 August 31, 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 consultancy companies by metro
- Clean energy consultancy companies in Houston178
- Clean energy consultancy companies in New York168
- Clean energy consultancy companies in Washington97
- Clean energy consultancy companies in Chicago81
- Clean energy consultancy companies in Denver76
- Clean energy consultancy companies in Los Angeles63
- Clean energy consultancy companies in Austin63
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 consultancy companies”; each Exact match badge shows search membership, not an individual similarity or quality score.
How many clean energy consultancy companies are there based in the United States?
RevenueBase identified 4,153 company matches for clean energy consultancy companies associated with the United States as of August 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 consultancy companies?
Houston leads with 178 company records, followed by New York (168) and Washington (97).
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 30,790 professional contacts with verified work emails tracked across these 4,153 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 August 31, 2026.
Ready to reach these companies? Verified emails and direct dials for all 4,153 clean energy consultancy companies based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Clean energy consultancy companies by geography
- Clean energy consultancy companies based in the United Kingdom
- Clean energy consultancy companies based in Brazil
- Clean energy consultancy companies based in France
- Clean energy consultancy companies based in Spain
- Clean energy consultancy companies based in Germany
- Clean energy consultancy companies based in Italy
- Clean energy consultancy companies based in the Netherlands
- Clean energy consultancy companies based in Australia
- Clean energy consultancy companies based in Canada
- Clean energy consultancy companies based in Mexico
- Clean energy consultancy companies based in South Africa
- Clean energy consultancy companies based in Switzerland
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 consultancy companies based in the United Kingdom
- Clean energy consultancy companies based in Brazil
- Clean energy consultancy companies based in France
- Clean energy consultancy companies based in Spain
- Clean energy consultancy companies based in Germany
- Clean energy consultancy companies based in Italy
Company intelligence · public preview
Top 25 clean energy consultancy companies 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 4,153 matching company records for clean energy consultancy companies based in the United States, with 68,689 tracked contacts and 30,790 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: August 31, 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 consultancy companies 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: HQ not recorded; location: Midland, TX, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Midland, TX, United States | 1,001-5,000 | Exact match | 4,145 contacts → |
“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 |  FTIfaithtechinc.comHQ: HQ not recorded; location: Menasha, WI, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Menasha, WI, United States | 1,001-5,000 | Exact match | 2,712 contacts → |
“Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | HQ: HQ not recorded; location: El Segundo, CA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: El Segundo, CA, United States | 1,001-5,000 | Exact match | 2,136 contacts → |
“Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Westwood Professional Serviceswestwoodps.comHQ: HQ not recorded; location: Lake Charles, LA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Lake Charles, LA, United States | 1,001-5,000 | Exact match | 1,631 contacts → |
“At Westwood, our purpose is to create a better world for people through our work.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 |  Swca Environmental Consultantsswca.comHQ: HQ not recorded; location: Phoenix, AZ, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Phoenix, AZ, United States | 1,001-5,000 | Exact match | 1,618 contacts → |
“Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 |  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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Davey Resource Group, INCdaveyresourcegroup.comHQ: HQ not recorded; location: Kent, OH, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Kent, OH, United States | 1,001-5,000 | Exact match | 1,407 contacts → |
“We are officially known as Davey Resource Group Inc, but we are more likely to come up in conversation around a successful project we've completed for a client or a capability we…” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Barr Engineering CObarr.comHQ: HQ not recorded; location: Washington, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Washington, United States | 1,001-5,000 | Exact match | 1,098 contacts → |
“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  Energy Solutionsenergy-solution.comHQ: HQ not recorded; location: Orange, CA, United StatesReported employees: 201-500 | HQ not recorded; location: Orange, CA, United States | 201-500 | Exact match | 768 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 |  Inercoinerco.comHQ: HQ not recorded; location: Delaware, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Delaware, United States | 1,001-5,000 | Exact match | 682 contacts → |
“INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 |  Tighe & Bondtighebond.comHQ: HQ not recorded; location: Portland, ME, United StatesReported employees: 501-1,000 | HQ not recorded; location: Portland, ME, United States | 501-1,000 | Exact match | 638 contacts → |
“Tighe & Bond is the Northeast’s leading engineering, environmental, planning, and design consulting firm.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Depcom Power, INCdepcompower.comHQ: HQ not recorded; location: Bedminster, NJ, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Bedminster, NJ, United States | 1,001-5,000 | Exact match | 623 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 |  XODUSxodusgroup.comHQ: HQ not recorded; location: Boston, MA, United StatesReported employees: 201-500 | HQ not recorded; location: Boston, MA, United States | 201-500 | Exact match | 527 contacts → |
“As a global energy consultancy, we unite our unique and diverse people to share knowledge, innovate and inspire change within the energy industry.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Natural Powernaturalpower.comHQ: HQ not recorded; location: Seattle, WA, United StatesReported employees: 501-1,000 | HQ not recorded; location: Seattle, WA, United States | 501-1,000 | Exact match | 505 contacts → |
“Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Hunt Guillot & Associates HGAhga-llc.comHQ: HQ not recorded; location: Ruston, LA, United StatesReported employees: 501-1,000 | HQ not recorded; location: Ruston, LA, United States | 501-1,000 | Exact match | 499 contacts → |
“HGA is a leading engineering, consulting, and program management company that has been delivering innovative and sustainable solutions to our clients for over 29 years.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Veregyveregy.comHQ: HQ not recorded; location: Phoenix, AZ, United StatesReported employees: 501-1,000 | HQ not recorded; location: Phoenix, AZ, United States | 501-1,000 | Exact match | 376 contacts → |
“Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Manhard Consultingmanhard.comHQ: HQ not recorded; location: Fort Worth, TX, United StatesReported employees: 201-500 | HQ not recorded; location: Fort Worth, TX, United States | 201-500 | Exact match | 373 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Takkiontakkion.comHQ: HQ not recorded; location: Evansville, WY, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Evansville, WY, United States | 1,001-5,000 | Exact match | 360 contacts → |
“TAKKION is Moving Energy Forward.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 |  U.S. Energyus-energy.comHQ: HQ not recorded; location: Houston, TX, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Houston, TX, United States | 1,001-5,000 | Exact match | 327 contacts → |
“U.S.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  3degrees Group, INC3degrees.comHQ: HQ not recorded; location: San Francisco, CA, United StatesReported employees: 201-500 | HQ not recorded; location: San Francisco, CA, United States | 201-500 | Exact match | 325 contacts → |
“3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 4,153 company matches
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Clean energy consultancy companies: dataset insights
August 31, 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
4,136 records in the displayed employee bands.
17 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: August 31, 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 consultancy companies by metro
- Clean energy consultancy companies in Houston178
- Clean energy consultancy companies in New York168
- Clean energy consultancy companies in Washington97
- Clean energy consultancy companies in Chicago81
- Clean energy consultancy companies in Denver76
- Clean energy consultancy companies in Los Angeles63
- Clean energy consultancy companies in Austin63
Questions about this company list
What does Exact match mean for clean energy consultancy companies?
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 consultancy companies did RevenueBase find based in the United States?
The saved snapshot records 4,153 matching company records, 68,689 tracked contacts and 30,790 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: August 31, 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 consultancy companies by geography
- Clean energy consultancy companies based in the United Kingdom
- Clean energy consultancy companies based in Brazil
- Clean energy consultancy companies based in France
- Clean energy consultancy companies based in Spain
- Clean energy consultancy companies based in Germany
- Clean energy consultancy companies based in Italy
- Clean energy consultancy companies based in the Netherlands
- Clean energy consultancy companies based in Australia
- Clean energy consultancy companies based in Canada
- Clean energy consultancy companies based in Mexico
- Clean energy consultancy companies based in South Africa
- Clean energy consultancy companies based in Switzerland
Cite this list
RevenueBase Data Team. Top 25 clean energy consultancy companies based in the United States. Snapshot: August 31, 2026. https://revenuebase.ai/companies/clean-energy-consultancy-companies/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
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- Clean energy consultancy companies based in the United Kingdom
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Company intelligence · public preview
Top 25 clean energy consultancy companies based in the United States
RevenueBase records 4,153 matching company records for clean energy consultancy companies based in the United States, with 68,689 tracked contacts and 30,790 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: August 31, 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 consultancy companies 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: HQ not recorded; location: Midland, TX, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Midland, TX, United States | 1,001-5,000 | Exact match | 4,145 contacts → |
“Sargent & Lundy is one of the world’s longest-standing full-service architect engineering firms.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | FTIfaithtechinc.com HQ: HQ not recorded; location: Menasha, WI, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Menasha, WI, United States | 1,001-5,000 | Exact match | 2,712 contacts → |
“Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | HQ: HQ not recorded; location: El Segundo, CA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: El Segundo, CA, United States | 1,001-5,000 | Exact match | 2,136 contacts → |
“Langan's client-focused, highly entrepreneurial culture cultivates an environment of opportunities in which career growth and teamwork flourish.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Westwood Professional Serviceswestwoodps.com HQ: HQ not recorded; location: Lake Charles, LA, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Lake Charles, LA, United States | 1,001-5,000 | Exact match | 1,631 contacts → |
“At Westwood, our purpose is to create a better world for people through our work.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Swca Environmental Consultantsswca.com HQ: HQ not recorded; location: Phoenix, AZ, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Phoenix, AZ, United States | 1,001-5,000 | Exact match | 1,618 contacts → |
“Founded on a commitment to sound science and creative solutions, SWCA is a leader in environmental and management consulting services.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Davey Resource Group, INCdaveyresourcegroup.com HQ: HQ not recorded; location: Kent, OH, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Kent, OH, United States | 1,001-5,000 | Exact match | 1,407 contacts → |
“We are officially known as Davey Resource Group Inc, but we are more likely to come up in conversation around a successful project we've completed for a client or a capability we…” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Barr Engineering CObarr.com HQ: HQ not recorded; location: Washington, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Washington, United States | 1,001-5,000 | Exact match | 1,098 contacts → |
“Barr provides engineering and environmental consulting services to clients across the Midwest, throughout the Americas, and around the world.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | Energy Solutionsenergy-solution.com HQ: HQ not recorded; location: Orange, CA, United StatesReported employees: 201-500 | HQ not recorded; location: Orange, CA, United States | 201-500 | Exact match | 768 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Inercoinerco.com HQ: HQ not recorded; location: Delaware, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Delaware, United States | 1,001-5,000 | Exact match | 682 contacts → |
“INERCO, with 30 years of experience, offers comprehensive services and develops advanced technologies that contribute to sustainable industrial development, acting as a leader in…” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Tighe & Bondtighebond.com HQ: HQ not recorded; location: Portland, ME, United StatesReported employees: 501-1,000 | HQ not recorded; location: Portland, ME, United States | 501-1,000 | Exact match | 638 contacts → |
“Tighe & Bond is the Northeast’s leading engineering, environmental, planning, and design consulting firm.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Depcom Power, INCdepcompower.com HQ: HQ not recorded; location: Bedminster, NJ, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Bedminster, NJ, United States | 1,001-5,000 | Exact match | 623 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | XODUSxodusgroup.com HQ: HQ not recorded; location: Boston, MA, United StatesReported employees: 201-500 | HQ not recorded; location: Boston, MA, United States | 201-500 | Exact match | 527 contacts → |
“As a global energy consultancy, we unite our unique and diverse people to share knowledge, innovate and inspire change within the energy industry.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Natural Powernaturalpower.com HQ: HQ not recorded; location: Seattle, WA, United StatesReported employees: 501-1,000 | HQ not recorded; location: Seattle, WA, United States | 501-1,000 | Exact match | 505 contacts → |
“Natural Power is a leading independent consultancy and service provider for the renewable energy sector.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Hunt Guillot & Associates HGAhga-llc.com HQ: HQ not recorded; location: Ruston, LA, United StatesReported employees: 501-1,000 | HQ not recorded; location: Ruston, LA, United States | 501-1,000 | Exact match | 499 contacts → |
“HGA is a leading engineering, consulting, and program management company that has been delivering innovative and sustainable solutions to our clients for over 29 years.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Veregyveregy.com HQ: HQ not recorded; location: Phoenix, AZ, United StatesReported employees: 501-1,000 | HQ not recorded; location: Phoenix, AZ, United States | 501-1,000 | Exact match | 376 contacts → |
“Veregy is an award-winning NAESCO-Accredited decarbonization company focusing on accelerating and simplifying the Energy Transition.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Manhard Consultingmanhard.com HQ: HQ not recorded; location: Fort Worth, TX, United StatesReported employees: 201-500 | HQ not recorded; location: Fort Worth, TX, United States | 201-500 | Exact match | 373 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Takkiontakkion.com HQ: HQ not recorded; location: Evansville, WY, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Evansville, WY, United States | 1,001-5,000 | Exact match | 360 contacts → |
“TAKKION is Moving Energy Forward.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | 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 · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | U.S. Energyus-energy.com HQ: HQ not recorded; location: Houston, TX, United StatesReported employees: 1,001-5,000 | HQ not recorded; location: Houston, TX, United States | 1,001-5,000 | Exact match | 327 contacts → |
“U.S.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | 3degrees Group, INC3degrees.com HQ: HQ not recorded; location: San Francisco, CA, United StatesReported employees: 201-500 | HQ not recorded; location: San Francisco, CA, United States | 201-500 | Exact match | 325 contacts → |
“3Degrees is a leading global climate solutions provider, pioneer of environmental markets, and Certified B Corporation.” Recorded description excerpt · August 31, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 4,153 company matches
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Clean energy consultancy companies: dataset insights
August 31, 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
4,136 records in the displayed employee bands.
17 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: August 31, 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 consultancy companies by metro
- Clean energy consultancy companies in Houston178
- Clean energy consultancy companies in New York168
- Clean energy consultancy companies in Washington97
- Clean energy consultancy companies in Chicago81
- Clean energy consultancy companies in Denver76
- Clean energy consultancy companies in Los Angeles63
- Clean energy consultancy companies in Austin63
Questions about this company list
What does Exact match mean for clean energy consultancy companies?
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 consultancy companies did RevenueBase find based in the United States?
The saved snapshot records 4,153 matching company records, 68,689 tracked contacts and 30,790 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: August 31, 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 consultancy companies by geography
- Clean energy consultancy companies based in the United Kingdom
- Clean energy consultancy companies based in Brazil
- Clean energy consultancy companies based in France
- Clean energy consultancy companies based in Spain
- Clean energy consultancy companies based in Germany
- Clean energy consultancy companies based in Italy
- Clean energy consultancy companies based in the Netherlands
- Clean energy consultancy companies based in Australia
- Clean energy consultancy companies based in Canada
- Clean energy consultancy companies based in Mexico
- Clean energy consultancy companies based in South Africa
- Clean energy consultancy companies based in Switzerland
Cite this list
RevenueBase Data Team. Top 25 clean energy consultancy companies based in the United States. Snapshot: August 31, 2026. https://revenuebase.ai/companies/clean-energy-consultancy-companies/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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