Company lists · Data verified August 2026

Top 25 Clean energy venture capital companies based in the United States

Name: Clean energy venture capital companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 524 companies tracked

There are 524 clean energy venture capital companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 7,933 professional contacts across them, including 2,531 with verified work emails and 2,727 with mobile numbers. New York is the largest hub.

This list covers clean energy venture capital 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. Data current as of August 28, 2026.

524Companies

7,933Contacts tracked

2,531Verified emails

2,727Mobile numbers

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The 25 largest clean energy venture capital companies based in the United States

Ranked by team size

Top 25 of 524 clean energy venture capital companies based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Envision Energy	Houston, TX	1,001-5,000	1,945	3
2	Palmetto	Charlotte, NC	201-500	533	208
3	HASI	New York, NY	51-200	194	151
4	Khosla Ventures	Menlo Park, CA	51-200	190	86
5	Quantum Capital Group	Houston, TX	51-200	178	119
6	Breakthrough Energy	Kirkland	51-200	158	56
7	NEW Energy Nexus	Berkeley, CA	51-200	136	81
8	Energy Impact Partners	San Francisco, CA	51-200	135	100
9	Greengo Energy Group	The Woodlands, TX	51-200	91	6
10	Greycroft	Los Angeles, CA	51-200	83	50
11	Ampyr Energy	New York	51-200	72	49
12	Thomaslloyd Group	New York, NY	1,001-5,000	65	43
13	Elemental Impact	Honolulu, HI	51-200	62	26
14	Climate Investment CI	Houston, TX	51-200	61	36
15	IOWN	La Jolla, CA	51-200	55	37
16	Tokyo GAS America LTD	Houston, TX	11-50	50	31
17	Sunwealth	Cambridge, MA	11-50	46	37
18	Toyota Ventures	Los Altos, CA	11-50	40	24
19	Sandbrook Capital	Stamford, CT	11-50	36	24
20	SJF Ventures	Durham, NC	11-50	34	10
21	The Westly Group	Menlo Park, CA	11-50	33	13
22	Spower	Spotsylvania, VA	201-500	32	4
23	National Renewable Solutions	Minnetonka, MN	11-50	28	26
24	Fortistar	White Plains, NY	201-500	25	19
25	SE Ventures	Menlo Park, CA	51-200	24	17

Showing 25 of 524 clean energy venture capital companies based in the United States

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Clean energy venture capital companies based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 57 HQs

2,727Contacts with mobile numbers

15Emails re-verified in last 30 days

Companies by employee count

1-10

342

11-50

144

51-200

201-500

501-1,000

1,001-5,000

Clean energy venture capital companies by metro

Metro	Companies
Clean energy venture capital companies in New York	57
Clean energy venture capital companies in San Francisco	39
Clean energy venture capital companies in Houston	38
Clean energy venture capital companies in Boston	20
Clean energy venture capital companies in Los Angeles	18
Clean energy venture capital companies in Chicago	17
Clean energy venture capital companies in Washington	12

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “clean energy venture capital companies”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 15 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many clean energy venture capital companies are there based in the United States?

There are 524 clean energy venture capital companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Envision Energy, headquartered in Houston, tops this list with the largest team on record.

Which city has the most clean energy venture capital companies?

New York leads with 57 headquartered companies, followed by San Francisco (39) and Houston (38).

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 2,531 verified decision-maker contacts tracked across these 524 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.