Company lists · Data verified August 2026

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

Name: Clean tech 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 446 companies tracked

There are 446 clean tech venture capital companies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 4,502 professional contacts across them, including 1,926 with verified work emails and 1,913 with mobile numbers. New York is the largest hub.

This list covers clean tech 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.

446Companies

4,502Contacts tracked

1,926Verified emails

1,913Mobile numbers

Unlock all 446 companies Free account · no credit card · 2 minutes

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

Ranked by team size

Top 25 of 446 clean tech 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	HASI	New York, NY	51-200	194	151
2	Khosla Ventures	Menlo Park, CA	51-200	190	86
3	Breakthrough Energy	Kirkland	51-200	158	56
4	Sutter Hill Ventures	Palo Alto	11-50	137	89
5	NEW Energy Nexus	Berkeley, CA	51-200	136	81
6	Energy Impact Partners	San Francisco, CA	51-200	135	100
7	Elemental Impact	Honolulu, HI	51-200	62	26
8	Climate Investment CI	Houston, TX	51-200	61	36
9	Playground Global	Palo Alto, CA	11-50	52	36
10	TDK Ventures	San Jose, CA	11-50	52	28
11	Tokyo GAS America LTD	Houston, TX	11-50	50	31
12	Sunwealth	Cambridge, MA	11-50	46	37
13	Toyota Ventures	Los Altos, CA	11-50	40	24
14	Sandbrook Capital	Stamford, CT	11-50	36	24
15	SJF Ventures	Durham, NC	11-50	34	10
16	Excelsior Energy Capital	Excelsior, MN	11-50	33	28
17	The Westly Group	Menlo Park, CA	11-50	33	13
18	Energize Capital	Chicago, IL	11-50	31	24
19	G2 Venture Partners	Portola Valley, CA	11-50	28	18
20	Elephant	Boston, MA	11-50	28	15
21	Fortistar	White Plains, NY	201-500	25	19
22	Cleargen Holdings LLC	Charlotte, NC	11-50	22	17
23	Nyceec	New York, NY	11-50	22	17
24	Vantagepoint Venture Partners	San Bruno, CA	51-200	22	3
25	Clearsky	West Palm Beach, FL	11-50	21	13

Showing 25 of 446 clean tech venture capital companies based in the United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,926 reachable decision-makers.

Free account · no credit card

See all 446 companies

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

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 44 HQs

1,913Contacts with mobile numbers

12Emails re-verified in last 30 days

Companies by employee count

1-10

323

11-50

107

51-200

201-500

501-1,000

10001+

Clean tech venture capital companies by metro

Metro	Companies
Clean tech venture capital companies in New York	44
Clean tech venture capital companies in San Francisco	44
Clean tech venture capital companies in Houston	26
Clean tech venture capital companies in Boston	20
Clean tech venture capital companies in Los Angeles	17
Clean tech venture capital companies in Chicago	15
Clean tech venture capital companies in Palo Alto	15
Clean tech 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 tech 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; 12 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 tech venture capital companies are there based in the United States?

There are 446 clean tech venture capital companies headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

HASI, headquartered in New York, tops this list with the largest team on record.

Which city has the most clean tech venture capital companies?

New York leads with 44 headquartered companies, followed by San Francisco (44) and Houston (26).

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 1,926 verified decision-maker contacts tracked across these 446 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.

Ready to reach these companies? Verified emails and direct dials for all 446 clean tech venture capital companies based in the United States. Start with a free account, no credit card.

Get the full list

Related lists

Clean tech venture capital companies by geography

Browse the directory

Browse: Companies home · All United States lists · All Clean tech venture capital companies lists · New lists

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.