Company lists · Data refreshed September 2026

Top 25 Energy technology companies based in the United States

Name: Energy technology companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 2,518 companies tracked

RevenueBase identified 2,518 energy technology companies headquartered in the United States as of September 2026 and tracks 286,065 professional contacts across them, including 111,593 with verified work emails. Houston is the largest hub.

This list covers energy technology companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

2,518Companies

286,065Contacts tracked

111,593Verified emails

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The 25 largest energy technology companies based in the United States

Ranked by team size

Top 25 of 2,518 energy technology companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to energy technology companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	TESLA	Indirect evidence	Austin, TX, United StatesHQ checked Sep 16, 2026	10001+	64,646 contacts →
	Indirect evidence “Tesla is accelerating the world’s transition to sustainable abundance.” Source: RevenueBase Database · checked Sep 16, 2026
2	GE Vernova	Strong evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	10001+	29,528 contacts →
	Strong evidence “GE Vernova is a purpose-built energy technology company on a mission to electrify to thrive and decarbonize the world.” Source: RevenueBase Database · checked Sep 16, 2026
3	GE Power	Strong evidence	Schenectady, NY, United StatesHQ checked Sep 16, 2026	10001+	16,095 contacts →
	Strong evidence “GE Power, part of GE Vernova, is a world energy leader that provides technology, solutions and services across the entire energy value chain from the point of generation to…” Source: RevenueBase Database · checked Sep 16, 2026
4	TRANE	Strong evidence	Davidson, NC, United StatesHQ checked Sep 16, 2026	10001+	10,272 contacts →
	Strong evidence “Trane is the building technology and energy solutions leader who deploys a depth and breadth of expertise, backgrounds, and perspectives to innovate new technologies and…” Source: RevenueBase Database · checked Sep 16, 2026
5	DTE Energy	Partial evidence	Detroit, MI, United StatesHQ checked Sep 16, 2026	10001+	9,087 contacts →
	Partial evidence “DTE is one of the largest Fortune 500 diversified energy companies, proudly serving Michigan for over a century.” Source: RevenueBase Database · checked Sep 16, 2026
6	Sunrun	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 16, 2026	10001+	7,974 contacts →
	Partial evidence “Life runs on clean energy.” Source: RevenueBase Database · checked Sep 16, 2026
7	Carrier	Strong evidence	Palm Beach Gardens, FL, United StatesHQ checked Sep 16, 2026	10001+	7,665 contacts →
	Strong evidence “Carrier is a global leader in intelligent climate and energy solutions, pioneering sustainable innovations in climate technologies.” Source: RevenueBase Database · checked Sep 16, 2026
8	Nextera Energy Resources	Partial evidence	Juno Beach, FL, United StatesHQ checked Sep 16, 2026	10001+	6,221 contacts →
	Partial evidence “NextEra Energy Resources, LLC, together with its affiliated entities,("NextEra Energy Resources") is one of the largest energy infrastructure companies in North America.” Source: RevenueBase Database · checked Sep 16, 2026
9	Toshiba	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 16, 2026	n/a	5,984 contacts →
	Indirect evidence “For 150 years, Toshiba has been engineering solutions that drive progress, empower industries, and create a more resilient future.” Source: RevenueBase Database · checked Sep 16, 2026
10	The AES Corporation	Partial evidence	Arlington, VA, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,387 contacts →
	Partial evidence “The world no longer thinks of energy as a matter of supply and demand.” Source: RevenueBase Database · checked Sep 16, 2026
11	Mortenson	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,298 contacts →
	Partial evidence “Mortenson is a U.S-based, top-25 builder, developer and provider of energy and engineering services committed to helping organizations move their strategies forward.” Source: RevenueBase Database · checked Sep 16, 2026
12	Hubbell Incorporated	Partial evidence	Shelton, CT, United StatesHQ checked Sep 16, 2026	10001+	4,053 contacts →
	Partial evidence “Hubbell Incorporated is a leading manufacturer of utility and electrical solutions that help build more reliable, resilient, and renewable energy infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
13	Generac	Partial evidence	Waukesha, WI, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,797 contacts →
	Partial evidence “Generac is the total energy solutions company powering a smarter world.” Source: RevenueBase Database · checked Sep 16, 2026
14	Fieldcore	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	10001+	3,700 contacts →
	Partial evidence “GE Vernova is a planned, purpose-built global energy company that includes Power, Wind, and Electrification businesses and is supported by its accelerator businesses of Advanced…” Source: RevenueBase Database · checked Sep 16, 2026
15	PPL Corporation	Indirect evidence	Allentown, PA, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,513 contacts →
	Indirect evidence “PPL Corporation’s family of companies provide electricity and natural gas to power our customers’ lives.” Source: RevenueBase Database · checked Sep 16, 2026
16	Enphase Energy	Strong evidence	Fremont, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	3,130 contacts →
	Strong evidence “Enphase Energy is a global energy technology company and the world’s leading supplier of microinverter-based solar and battery systems.” Source: RevenueBase Database · checked Sep 16, 2026
17	FTI	Strong evidence	Menasha, WI, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,741 contacts →
	Strong evidence “Faith Technologies Incorporated (FTI) is a dynamic organization comprised of construction, engineering, manufacturing and renewable energy experts.” Source: RevenueBase Database · checked Sep 16, 2026
18	Invenergy	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,408 contacts →
	Indirect evidence “Invenergy is North America’s largest privately held developer, owner, and operator of innovative, reliable power infrastructure.” Source: RevenueBase Database · checked Sep 16, 2026
19	Babcock & Wilcox	Strong evidence	Akron, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,340 contacts →
	Strong evidence “Babcock & Wilcox, based in Akron, Ohio, USA is a global leader in energy and environmental technologies and services for power, renewable and industrial markets.” Source: RevenueBase Database · checked Sep 16, 2026
20	Fluence	Partial evidence	Arlington, VA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,863 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
21	Mitsubishi Power Americas	Partial evidence	Lake Mary, FL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,859 contacts →
	Partial evidence “Mitsubishi Power Americas is creating a future that works for people and the planet through innovative power generation technology and solutions.” Source: RevenueBase Database · checked Sep 16, 2026
22	Rehlko	Partial evidence	Milwaukee, WI, United StatesHQ checked Sep 16, 2026	5,001-10,000	1,709 contacts →
	Partial evidence “Rehlko is a global leader in energy resilience, delivering the solutions critical to sustain and improve life.” Source: RevenueBase Database · checked Sep 16, 2026
23	Ameresco	Partial evidence	Framingham, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,383 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
24	Solv Energy	Partial evidence	San Diego, CA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,286 contacts →
	Partial evidence “SOLV Energy is a renewable energy solutions provider for utility solar, energy storage, and high voltage projects in North America.” Source: RevenueBase Database · checked Sep 16, 2026
25	Ormat Technologies, INC	Partial evidence	Reno, NV, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,281 contacts →
	Partial evidence “With over five decades of experience, Ormat Technologies, Inc.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy technology companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names energy technology companies.
Partial evidence: Its own public description names part of energy technology companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name energy technology companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 2,518 energy technology companies based in the United States

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Energy technology companies based in the United States at a glance

As of Sep 16, 2026

39.0%Verified-email coverage

113.6Average contacts per company

11-50Median size (employees)

3.8%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

998

11-50

888

51-200

372

201-500

119

501-1,000

1,001-5,000

5,001-10,000

10001+

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 2,518 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among energy technology companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “energy technology companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy technology companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among energy technology companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 111,593 across the full list. 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 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Energy technology companies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy technology companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many energy technology companies are there based in the United States?

RevenueBase identified 2,518 energy technology companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

TESLA, headquartered in Austin, tops this list with the largest team on record.

Which city has the most energy technology companies?

Houston leads with 95 headquartered companies, followed by New York (88) and Austin (52).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 111,593 verified decision-maker contacts tracked across these 2,518 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 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 Smart Search, 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.