Company lists · Data refreshed September 2026

Top 25 Energy as a service companies based in the United States

RevenueBase identified 3,466 company matches for energy as a service companies associated with the United States as of September 2026 and tracks 103,553 professional contacts across them, including 40,562 with verified work emails. Houston is the largest hub.

This list covers company matches for energy as a service 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 September 15, 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.

How to read this list RevenueBase SmartSearch · Exact Recorded Sep 15, 2026 How this list was built
3,466Companies
103,553Contacts tracked
40,562Verified emails
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The 25 largest energy as a service companies based in the United States

Ranked by team size
Top 25 of 3,466 company matches for energy as a service companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 15, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchDetroit, MI, United StatesHQ recorded Sep 15, 202610001+9,087 contacts →

Exact match

“DTE is one of the largest Fortune 500 diversified energy companies, proudly serving Michigan for over a century.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
2Exact matchArlington, VA, United StatesHQ recorded Sep 15, 20265,001-10,0005,387 contacts →

Exact match

“The world no longer thinks of energy as a matter of supply and demand.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
3Exact matchIrving, TX, United StatesHQ recorded Sep 15, 2026n/a4,150 contacts →

Exact match

“Ambit Energy provides electricity, natural gas and solar services in numerous markets across the United States, primarily marketed through a direct sales channel of more than…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
4Exact matchWaukesha, WI, United StatesHQ recorded Sep 15, 20265,001-10,0003,797 contacts →

Exact match

“Generac is the total energy solutions company powering a smarter world.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
5Exact matchMenasha, WI, United StatesHQ recorded Sep 15, 20261,001-5,0002,741 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 15, 2026 · View company records in RevenueBase
6Exact matchSeattle, WA, United StatesHQ recorded Sep 15, 20261,001-5,0002,213 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 15, 2026 · View company records in RevenueBase
7Exact matchAustin, TX, United StatesHQ recorded Sep 15, 20261,001-5,0002,121 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 15, 2026 · View company records in RevenueBase
8Exact matchArlington, VA, United StatesHQ recorded Sep 15, 20261,001-5,0001,863 contacts →

Exact match

“To achieve our mission, we design, deploy, and operate the world’s most advanced modular energy storage products, comprehensive lifecycle services, and AI-enabled asset management…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
9Exact matchMilwaukee, WI, United StatesHQ recorded Sep 15, 20265,001-10,0001,709 contacts →

Exact match

“Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
10Exact matchHouston, TX, United StatesHQ recorded Sep 15, 20261,001-5,0001,645 contacts →

Exact match

“Established in 1997, Just Energy has been a leading retail energy provider serving markets across the United States and Canada.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
11Exact matchDublin, OH, United StatesHQ recorded Sep 15, 20261,001-5,0001,388 contacts →

Exact match

“IGS Energy has been a trusted energy advisor since 1989, growing into one of the nation’s top energy retailers.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
12Exact matchFramingham, MA, United StatesHQ recorded Sep 15, 20261,001-5,0001,383 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 15, 2026 · View company records in RevenueBase
13Exact matchMiami, FL, United StatesHQ recorded Sep 15, 20261,001-5,000998 contacts →

Exact match

“Headquartered in Miami, Florida, World Kinect Corporation (NYSE: WKC) is a leading global energy management company, offering a broad suite of solutions across the energy product…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
14Exact matchLehi, UT, United StatesHQ recorded Sep 15, 20261,001-5,000960 contacts →

Exact match

“LGCY Power is committed to changing the way the world produces power.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
15Exact matchHouston, TX, United StatesHQ recorded Sep 15, 2026501-1,000906 contacts →

Exact match

“Sunnova Energy International Inc.(NYSE: NOVA) is an industry-leading energy services company focused on making clean energy more accessible, reliable, and affordable for…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
16Exact matchWashington, DC, United StatesHQ recorded Sep 15, 2026501-1,000864 contacts →

Exact match

“Arcadia is the global utility data and energy solutions platform.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
17Exact matchAnaheim, CA, United StatesHQ recorded Sep 15, 20261,001-5,000851 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 15, 2026 · View company records in RevenueBase
18Exact matchOakland, CA, United StatesHQ recorded Sep 15, 2026201-500772 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 15, 2026 · View company records in RevenueBase
19Exact matchDurham, NC, United StatesHQ recorded Sep 15, 2026501-1,000740 contacts →

Exact match

“PowerSecure, a Southern Company subsidiary, is a leading provider of innovative energy solutions to electric utilities and their industrial, institutional, and commercial…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
20Exact matchHalf Moon Bay, CA, United StatesHQ recorded Sep 15, 2026501-1,000733 contacts →

Exact match

“Resource Innovations (RI) is an energy transformation firm.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
21Exact matchScottsdale, AZ, United StatesHQ recorded Sep 15, 20261,001-5,000624 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 15, 2026 · View company records in RevenueBase
22Exact matchJacksonville, FL, United StatesHQ recorded Sep 15, 2026201-500595 contacts →

Exact match

“The Energy Authority (TEA®) is the strategic partner of choice in providing energy solutions to public power.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
23Exact matchDoral, FL, United StatesHQ recorded Sep 15, 20261,001-5,000567 contacts →

Exact match

“SoEnergy is a global provider of "energy as a service", ensuring customized solutions for a diverse array of organizations and industries worldwide, such as mining, oil & gas…”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
24Exact matchCharlotte, NC, United StatesHQ recorded Sep 15, 2026201-500539 contacts →

Exact match

“Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase
25Exact matchSt. Rose, LA, United StatesHQ recorded Sep 15, 2026501-1,000507 contacts →

Exact match

“PosiGen is the nation's leading residential solar and energy efficiency provider.”

Recorded in the RevenueBase company graph · Sep 15, 2026 · View company records in RevenueBase

Showing 25 of 3,466 energy as a service companies based in the United States

See the full list, filter by size, metro and specialty, and access 40,562 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Energy as a service companies based in the United States at a glance

As of Sep 15, 2026
39.2%Verified-email coverage
29.9Average contacts per company
11-50Median size (employees)
4.7%Largest-city concentration · Houston
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
1,550
11-50
1,293
51-200
430
201-500
102
501-1,000
29
1,001-5,000
43
5,001-10,000
6
10001+
8

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 3,466 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 “energy as a service 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 40,562 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 15, 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.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “energy as a service companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many energy as a service companies are there based in the United States?

RevenueBase identified 3,466 company matches for energy as a service companies 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?

DTE Energy tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most energy as a service companies?

Houston leads with 163 company records, followed by New York (128) and Dallas (60).

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 40,562 professional contacts with verified work emails tracked across these 3,466 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 15, 2026.

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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.