Company lists · Data refreshed September 2026

Top 17 Cleantech accelerators based in San Francisco, United States

RevenueBase identified 54 company matches for cleantech accelerators associated with San Francisco, United States as of September 2026 and tracks 834 professional contacts across them, including 105 with verified work emails. Across the United States, New York is the largest hub for this category (58 companies); San Francisco follows with 54.

This list covers company matches for cleantech accelerators associated with San Francisco, 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 19, 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 19, 2026 How this list was built
54Companies
834Contacts tracked
105Verified emails
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The 17 largest cleantech accelerators based in San Francisco, United States

Ranked by team size
Top 17 of 54 company matches for cleantech accelerators based in San Francisco, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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 matchSan Francisco, CA, United StatesHQ recorded Sep 19, 2026n/a321 contacts →

Exact match

“The Alchemist Accelerator is a venture-backed initiative focused on accelerating the development of seed-stage ventures that monetize from enterprises (not consumers).”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
2Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 202611-50110 contacts →

Exact match

“Winning in clean technologies is complex-new technologies emerge, policies shift, and it’s hard to know which opportunities will scale and which will fail.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 202611-5039 contacts →

Exact match

“Praan is a venture-backed deep tech start-up using breakthrough patent-pending technology for filter-less capture of particulates and carbon dioxide from ambient air.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-1030 contacts →

Exact match

“Pioneers receive join a 3-month remote accelerator program, spend a month together in Silicon Valley, and much more.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 202611-5013 contacts →

Exact match

“Atmos is a technology company on a mission to accelerate the clean economy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-1013 contacts →

Exact match

“MARL 5G is an accelerator program focused on startups that create DeepTech products and services for enterprise customers running on 5G.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-1012 contacts →

Exact match

“ProspectSV drives new ideas in decarbonization through research, demonstration, and project leadership.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-105 contacts →

Exact match

“The future is being built in SF, NYC, London, Chicago, Amsterdam and beyond.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchSan Francisco, United StatesHQ recorded Sep 19, 20261-104 contacts →

Exact match

“We are on a mission to enable every business to be powered by clean, affordable energy.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-104 contacts →

Exact match

“Huck is a tech-enabled investment fund on a mission to inspire, finance and build the next generation of energy providers.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-103 contacts →

Exact match

“DERNetSoft is an innovative cleantech startup driving the digital transformation of the energy industry.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-102 contacts →

Exact match

“Hands-on startup and product building - helping climate founders with product, gtm, scaling, and fundraising.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchSan Francisco, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“We are your cleantech Go-to-Market (GTM) strike team, accelerating the success of innovative products and services for decades.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“Radiate is a platform that builds, funds, and scales climate technology and energy transition businesses.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“zipdragon ventures (ZDV) is an investment firm providing seed capital to industry cloud startups.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchSan Francisco, CA, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“ultraAccelereator for startups in #foodTech #HealthTech and #SynBio Full support for your concept, product, best pitch, and fundraising for two years.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchSan Francisco, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“AHC provides advisory and consulting services in clean energy and transportation.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 17 of 54 cleantech accelerators based in San Francisco, United States

See the full list, filter by size, metro and specialty, and access 105 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Cleantech accelerators based in San Francisco, United States at a glance

As of Sep 19, 2026
12.6%Verified-email coverage
15.4Average contacts per company
1-10Median size (employees)
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
37
11-50
14
51-200
1
201-500
1
501-1,000
1

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 54 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 San Francisco, United States whose business descriptions match “cleantech accelerators” 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 105 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 19, 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.

Cleantech accelerators by metro in the United States

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 “cleantech accelerators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many cleantech accelerators are there based in San Francisco, United States?

RevenueBase identified 54 company matches for cleantech accelerators associated with San Francisco, 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?

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

Which city in the United States has the most cleantech accelerators?

New York leads the United States with 58 company records, followed by San Francisco (54) and Houston (36).

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 105 professional contacts with verified work emails tracked across these 54 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 19, 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.