Company lists · Data refreshed September 2026
Top 25 Cleantech accelerators based in the United States
RevenueBase identified 818 company matches for cleantech accelerators associated with the United States as of September 2026 and tracks 11,696 professional contacts across them, including 2,828 with verified work emails. New York is the largest hub.
This list covers company matches for cleantech accelerators 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 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.
The 25 largest cleantech accelerators based in the United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 1,803 contacts → | ||||
Exact match “Techstars helps founders scale their startups into world-changing businesses.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 2 | 1,199 contacts → | ||||
Exact match “The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 3 | 539 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 19, 2026 · View company records in RevenueBase | |||||
| 4 | 321 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 | |||||
| 5 | 213 contacts → | ||||
Exact match “The Energy & Environmental Research Center (EERC) is recognized as one of the world's leading developers of cleaner, more efficient energy to power the world and environmental…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 6 | 163 contacts → | ||||
Exact match “Los Angeles Cleantech Incubator (LACI) is creating an inclusive green economy for the people of Los Angeles by unlocking innovation by working with startups to accelerate the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 7 | 159 contacts → | ||||
Exact match “Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 8 | 155 contacts → | ||||
Exact match “CleanChoice Energy is a cleantech company that empowers people and businesses to easily access climate solutions.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 9 | 149 contacts → | ||||
Exact match “The Massachusetts Clean Energy Center is a state economic development agency dedicated to accelerating the growth of the clean energy and climatetech sector across the…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 10 | 136 contacts → | ||||
Exact match “New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 11 | 132 contacts → | ||||
Exact match “The Cleantech Open runs the world's largest cleantech accelerator.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 12 | 131 contacts → | ||||
Exact match “Sublime Systems is leading a swift and massive transition to a clean cement manufacturing future.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 13 | 131 contacts → | ||||
Exact match “ConnectM is a clean energy technology and solutions provider for residential and light commercial buildings and all-electric original equipment manufacturers with a proprietary…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 14 | 126 contacts → | ||||
Exact match “Silicon Catalyst is the only incubator + accelerator focused on the Global Semiconductor Industry including Chips, Chiplets, Materials, IP and Silicon fabrication-based Photonics…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 15 | 116 contacts → | ||||
Exact match “To attract the best Nerds on the planet and “Nerdify” customers with innovative solutions that reduce energy consumption and produce clean, renewable energy.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 16 | 114 contacts → | ||||
Exact match “Entrepreneurs Roundtable Accelerator (ERA) is New York City’s leading technology accelerator and early-stage venture capital fund.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 17 | 110 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 | |||||
| 18 | 94 contacts → | ||||
Exact match “Greentown Labs is a 501(c)(3) nonprofit accelerating climatetech innovation for the planet, people, and prosperity.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 19 | 80 contacts → | ||||
Exact match “Syzygy Plasmonics is a technology company decarbonizing chemical production with its proprietary light-driven reactor technology.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 20 | 67 contacts → | ||||
Exact match “Onyx Renewables is a leading provider of predictable, affordable clean energy solutions nationwide.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 21 | 65 contacts → | ||||
Exact match “Resurety is the only clean energy industry partner to bring together actionable market insights and groundbreaking transaction tools in one seamless ecosystem.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 22 | 65 contacts → | ||||
Exact match “Common Energy works with developers across the country to activate their clean energy projects and maximize ROI.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 23 | 58 contacts → | ||||
Exact match “We work with entrepreneurs to refine ideas, attract talent, access capital, and accelerate growth.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 24 | 56 contacts → | ||||
Exact match “Solstice is dedicated to bringing the benefits of clean energy to every community.” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
| 25 | 54 contacts → | ||||
Exact match “Sealed is a climate tech company on a mission to stop home energy waste by enabling contractors to install more home weatherization and electrification projects and grow their…” Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase | |||||
RevenueBase SmartSearch
Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.
This list uses Exact for “cleantech accelerators”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.
Showing 25 of 818 cleantech accelerators based in the United States
See the full list, filter by size, metro and specialty, and access 2,828 tracked professional contacts with verified work emails. Direct dials are available where recorded.
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Cleantech accelerators based in the United States at a glance
As of Sep 19, 2026Companies by employee count
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 818 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 “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 2,828 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
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 the United States?
RevenueBase identified 818 company matches for cleantech accelerators 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?
Techstars tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.
Which city has the most cleantech accelerators?
New York leads with 60 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 2,828 professional contacts with verified work emails tracked across these 818 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.
Ready to reach these companies? Verified emails and direct dials for all 818 cleantech accelerators based in the United States. Start with a free account, no credit card.
Download this list →Related lists
Cleantech accelerators by geography
- Cleantech accelerators based in Houston, United States
- Cleantech accelerators based in New York, United States
- Cleantech accelerators based in San Francisco, United States
- Cleantech accelerators based in Australia
- Cleantech accelerators based in Belgium
- Cleantech accelerators based in Brazil
- Cleantech accelerators based in Canada
- Cleantech accelerators based in Denmark
- Cleantech accelerators based in France
- Cleantech accelerators based in Germany
- Cleantech accelerators based in India
- Cleantech accelerators based in Israel
Browse the directory
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.
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- Cleantech accelerators based in Houston, United States
- Cleantech accelerators based in New York, United States
- Cleantech accelerators based in San Francisco, United States
- Cleantech accelerators based in Australia
- Cleantech accelerators based in Belgium
- Cleantech accelerators based in Brazil
Company intelligence · public preview
Top 25 cleantech accelerators based in the United States
Find companies in any niche.
Describe the businesses you want in your own words. RevenueBase SmartSearch matches company descriptions by meaning.
RevenueBase records 818 matching company records for cleantech accelerators based in the United States, with 11,696 tracked contacts and 2,828 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 cleantech accelerators based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 |  Techstarstechstars.comHQ: New York, NY, United StatesReported employees: Not recorded | New York, NY, United States | Not recorded | Exact match | 1,803 contacts → |
“Techstars helps founders scale their startups into world-changing businesses.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Powur, PBCpowur.com HQ: San Diego, United StatesReported employees: Not recorded | San Diego, United States | Not recorded | Exact match | 1,199 contacts → |
“The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 |  Palmettoplm.toHQ: Charlotte, NC, United StatesReported employees: 201-500 | Charlotte, NC, United States | 201-500 | Exact match | 539 contacts → |
“Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 |  Alchemist Acceleratoralchemistaccelerator.comHQ: San Francisco, CA, United StatesReported employees: Not recorded | San Francisco, CA, United States | Not recorded | Exact match | 321 contacts → |
“The Alchemist Accelerator is a venture-backed initiative focused on accelerating the development of seed-stage ventures that monetize from enterprises (not consumers).” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Energy & Environmental Research Centerundeerc.org HQ: Grand Forks, ND, United StatesReported employees: 201-500 | Grand Forks, ND, United States | 201-500 | Exact match | 213 contacts → |
“The Energy & Environmental Research Center (EERC) is recognized as one of the world's leading developers of cleaner, more efficient energy to power the world and environmental…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Los Angeles, CA, United StatesReported employees: 51-200 | Los Angeles, CA, United States | 51-200 | Exact match | 163 contacts → |
“Los Angeles Cleantech Incubator (LACI) is creating an inclusive green economy for the people of Los Angeles by unlocking innovation by working with startups to accelerate the…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 |  Breakthrough Energybreakthroughenergy.orgHQ: Kirkland, United StatesReported employees: 51-200 | Kirkland, United States | 51-200 | Exact match | 159 contacts → |
“Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 |  Cleanchoice Energycleanchoiceenergy.comHQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 155 contacts → |
“CleanChoice Energy is a cleantech company that empowers people and businesses to easily access climate solutions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 |  Massachusetts Clean Energy Centermasscec.comHQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 149 contacts → |
“The Massachusetts Clean Energy Center is a state economic development agency dedicated to accelerating the growth of the clean energy and climatetech sector across the…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 |  NEW Energy Nexusnewenergynexus.comHQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 136 contacts → |
“New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 |  Cleantech Opencleantechopen.orgHQ: Los Angeles, CA, United StatesReported employees: 11-50 | Los Angeles, CA, United States | 11-50 | Exact match | 132 contacts → |
“The Cleantech Open runs the world's largest cleantech accelerator.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Sublime Systemssublime-systems.com HQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 131 contacts → |
“Sublime Systems is leading a swift and massive transition to a clean cement manufacturing future.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Connectm Technology Solutionsconnectm.com HQ: Marlborough, MA, United StatesReported employees: 51-200 | Marlborough, MA, United States | 51-200 | Exact match | 131 contacts → |
“ConnectM is a clean energy technology and solutions provider for residential and light commercial buildings and all-electric original equipment manufacturers with a proprietary…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 |  Silicon Catalystsiliconcatalyst.comHQ: Santa Clara, CA, United StatesReported employees: 11-50 | Santa Clara, CA, United States | 11-50 | Exact match | 126 contacts → |
“Silicon Catalyst is the only incubator + accelerator focused on the Global Semiconductor Industry including Chips, Chiplets, Materials, IP and Silicon fabrication-based Photonics…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | NERDnerdpower.energy HQ: Gilbert, AZ, United StatesReported employees: 51-200 | Gilbert, AZ, United States | 51-200 | Exact match | 116 contacts → |
“To attract the best Nerds on the planet and “Nerdify” customers with innovative solutions that reduce energy consumption and produce clean, renewable energy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 |  Entrepreneurs Roundtable Acceleratoreranyc.comHQ: NY, United StatesReported employees: Not recorded | NY, United States | Not recorded | Exact match | 114 contacts → |
“Entrepreneurs Roundtable Accelerator (ERA) is New York City’s leading technology accelerator and early-stage venture capital fund.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 |  Cleantech Groupcleantech.comHQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 110 contacts → |
“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 description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 |  Greentown Labsgreentownlabs.comHQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 94 contacts → |
“Greentown Labs is a 501(c)(3) nonprofit accelerating climatetech innovation for the planet, people, and prosperity.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 |  Syzygy Plasmonicsplasmonics.techHQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 80 contacts → |
“Syzygy Plasmonics is a technology company decarbonizing chemical production with its proprietary light-driven reactor technology.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 |  Onyx Renewablesonyxrenewables.comHQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 67 contacts → |
“Onyx Renewables is a leading provider of predictable, affordable clean energy solutions nationwide.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 |  Resuretyresurety.comHQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 65 contacts → |
“Resurety is the only clean energy industry partner to bring together actionable market insights and groundbreaking transaction tools in one seamless ecosystem.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 |  Common Energycommonenergy.usHQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 65 contacts → |
“Common Energy works with developers across the country to activate their clean energy projects and maximize ROI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 |  Basistechbasistech.comHQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 58 contacts → |
“We work with entrepreneurs to refine ideas, attract talent, access capital, and accelerate growth.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Solsticesolstice.us HQ: Cambridge, MA, United StatesReported employees: 11-50 | Cambridge, MA, United States | 11-50 | Exact match | 56 contacts → |
“Solstice is dedicated to bringing the benefits of clean energy to every community.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 |  Sealedsealed.comHQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 54 contacts → |
“Sealed is a climate tech company on a mission to stop home energy waste by enabling contractors to install more home weatherization and electrification projects and grow their…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
Showing 25 of 818 company matches
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Cleantech accelerators: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
817 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 818 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Cleantech accelerators by metro
Questions about this company list
What does Exact match mean for cleantech accelerators?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many cleantech accelerators did RevenueBase find based in the United States?
The saved snapshot records 818 matching company records, 11,696 tracked contacts and 2,828 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cleantech accelerators by geography
- Cleantech accelerators based in Houston, United States
- Cleantech accelerators based in New York, United States
- Cleantech accelerators based in San Francisco, United States
- Cleantech accelerators based in Australia
- Cleantech accelerators based in Belgium
- Cleantech accelerators based in Brazil
- Cleantech accelerators based in Canada
- Cleantech accelerators based in Denmark
- Cleantech accelerators based in France
- Cleantech accelerators based in Germany
- Cleantech accelerators based in India
- Cleantech accelerators based in Israel
Browse the directory
Cite this list
RevenueBase Data Team. Top 25 cleantech accelerators based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/cleantech-accelerators/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Cleantech accelerators based in Houston, United States
- Cleantech accelerators based in New York, United States
- Cleantech accelerators based in San Francisco, United States
- Cleantech accelerators based in Australia
- Cleantech accelerators based in Belgium
- Cleantech accelerators based in Brazil
Company intelligence · public preview
Top 25 cleantech accelerators based in the United States
RevenueBase records 818 matching company records for cleantech accelerators based in the United States, with 11,696 tracked contacts and 2,828 verified work emails.
This public preview shows 25 selected records ordered by tracked contacts. RevenueBase SmartSearch finds company descriptions that match by meaning at Exact. Snapshot: September 19, 2026.
RevenueBase compiles business descriptions for niche-company discovery; each row shows a recorded excerpt where available. Adapt this search to find the companies and contacts you want.
Top 25 cleantech accelerators based in the United States
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
| # | Company | Headquarters on record | Reported employees | RevenueBase SmartSearch | Tracked contacts |
|---|---|---|---|---|---|
| 1 | Techstarstechstars.com HQ: New York, NY, United StatesReported employees: Not recorded | New York, NY, United States | Not recorded | Exact match | 1,803 contacts → |
“Techstars helps founders scale their startups into world-changing businesses.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 2 | Powur, PBCpowur.com HQ: San Diego, United StatesReported employees: Not recorded | San Diego, United States | Not recorded | Exact match | 1,199 contacts → |
“The Powur Mission: Accelerate the adoption of clean energy worldwide We're empowering our community of homeowners and advisors to thrive in the global shift to sustainable energy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 3 | Palmettoplm.to HQ: Charlotte, NC, United StatesReported employees: 201-500 | Charlotte, NC, United States | 201-500 | Exact match | 539 contacts → |
“Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 4 | Alchemist Acceleratoralchemistaccelerator.com HQ: San Francisco, CA, United StatesReported employees: Not recorded | San Francisco, CA, United States | Not recorded | Exact match | 321 contacts → |
“The Alchemist Accelerator is a venture-backed initiative focused on accelerating the development of seed-stage ventures that monetize from enterprises (not consumers).” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 5 | Energy & Environmental Research Centerundeerc.org HQ: Grand Forks, ND, United StatesReported employees: 201-500 | Grand Forks, ND, United States | 201-500 | Exact match | 213 contacts → |
“The Energy & Environmental Research Center (EERC) is recognized as one of the world's leading developers of cleaner, more efficient energy to power the world and environmental…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 6 | HQ: Los Angeles, CA, United StatesReported employees: 51-200 | Los Angeles, CA, United States | 51-200 | Exact match | 163 contacts → |
“Los Angeles Cleantech Incubator (LACI) is creating an inclusive green economy for the people of Los Angeles by unlocking innovation by working with startups to accelerate the…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 7 | Breakthrough Energybreakthroughenergy.org HQ: Kirkland, United StatesReported employees: 51-200 | Kirkland, United States | 51-200 | Exact match | 159 contacts → |
“Breakthrough Energy backs companies developing the next generation of clean energy solutions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 8 | Cleanchoice Energycleanchoiceenergy.com HQ: Washington, DC, United StatesReported employees: 51-200 | Washington, DC, United States | 51-200 | Exact match | 155 contacts → |
“CleanChoice Energy is a cleantech company that empowers people and businesses to easily access climate solutions.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 9 | Massachusetts Clean Energy Centermasscec.com HQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 149 contacts → |
“The Massachusetts Clean Energy Center is a state economic development agency dedicated to accelerating the growth of the clean energy and climatetech sector across the…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 10 | NEW Energy Nexusnewenergynexus.com HQ: Berkeley, CA, United StatesReported employees: 51-200 | Berkeley, CA, United States | 51-200 | Exact match | 136 contacts → |
“New Energy Nexus (NEX) is the world's leading ecosystem of funds and accelerators supporting diverse clean energy entrepreneurs to thrive, from emerging tech through to clean…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 11 | Cleantech Opencleantechopen.org HQ: Los Angeles, CA, United StatesReported employees: 11-50 | Los Angeles, CA, United States | 11-50 | Exact match | 132 contacts → |
“The Cleantech Open runs the world's largest cleantech accelerator.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 12 | Sublime Systemssublime-systems.com HQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 131 contacts → |
“Sublime Systems is leading a swift and massive transition to a clean cement manufacturing future.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 13 | Connectm Technology Solutionsconnectm.com HQ: Marlborough, MA, United StatesReported employees: 51-200 | Marlborough, MA, United States | 51-200 | Exact match | 131 contacts → |
“ConnectM is a clean energy technology and solutions provider for residential and light commercial buildings and all-electric original equipment manufacturers with a proprietary…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 14 | Silicon Catalystsiliconcatalyst.com HQ: Santa Clara, CA, United StatesReported employees: 11-50 | Santa Clara, CA, United States | 11-50 | Exact match | 126 contacts → |
“Silicon Catalyst is the only incubator + accelerator focused on the Global Semiconductor Industry including Chips, Chiplets, Materials, IP and Silicon fabrication-based Photonics…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 15 | NERDnerdpower.energy HQ: Gilbert, AZ, United StatesReported employees: 51-200 | Gilbert, AZ, United States | 51-200 | Exact match | 116 contacts → |
“To attract the best Nerds on the planet and “Nerdify” customers with innovative solutions that reduce energy consumption and produce clean, renewable energy.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 16 | Entrepreneurs Roundtable Acceleratoreranyc.com HQ: NY, United StatesReported employees: Not recorded | NY, United States | Not recorded | Exact match | 114 contacts → |
“Entrepreneurs Roundtable Accelerator (ERA) is New York City’s leading technology accelerator and early-stage venture capital fund.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 17 | Cleantech Groupcleantech.com HQ: San Francisco, CA, United StatesReported employees: 11-50 | San Francisco, CA, United States | 11-50 | Exact match | 110 contacts → |
“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 description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 18 | Greentown Labsgreentownlabs.com HQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 94 contacts → |
“Greentown Labs is a 501(c)(3) nonprofit accelerating climatetech innovation for the planet, people, and prosperity.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 19 | Syzygy Plasmonicsplasmonics.tech HQ: Houston, TX, United StatesReported employees: 11-50 | Houston, TX, United States | 11-50 | Exact match | 80 contacts → |
“Syzygy Plasmonics is a technology company decarbonizing chemical production with its proprietary light-driven reactor technology.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 20 | Onyx Renewablesonyxrenewables.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 67 contacts → |
“Onyx Renewables is a leading provider of predictable, affordable clean energy solutions nationwide.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 21 | Resuretyresurety.com HQ: Boston, MA, United StatesReported employees: 51-200 | Boston, MA, United States | 51-200 | Exact match | 65 contacts → |
“Resurety is the only clean energy industry partner to bring together actionable market insights and groundbreaking transaction tools in one seamless ecosystem.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 22 | Common Energycommonenergy.us HQ: New York, NY, United StatesReported employees: 11-50 | New York, NY, United States | 11-50 | Exact match | 65 contacts → |
“Common Energy works with developers across the country to activate their clean energy projects and maximize ROI.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 23 | Basistechbasistech.com HQ: Somerville, MA, United StatesReported employees: 51-200 | Somerville, MA, United States | 51-200 | Exact match | 58 contacts → |
“We work with entrepreneurs to refine ideas, attract talent, access capital, and accelerate growth.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 24 | Solsticesolstice.us HQ: Cambridge, MA, United StatesReported employees: 11-50 | Cambridge, MA, United States | 11-50 | Exact match | 56 contacts → |
“Solstice is dedicated to bringing the benefits of clean energy to every community.” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
| 25 | Sealedsealed.com HQ: New York, NY, United StatesReported employees: 51-200 | New York, NY, United States | 51-200 | Exact match | 54 contacts → |
“Sealed is a climate tech company on a mission to stop home energy waste by enabling contractors to install more home weatherization and electrification projects and grow their…” Recorded description excerpt · September 19, 2026Open company data in RevenueBase ↗Free signup required. | |||||
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Cleantech accelerators: dataset insights
September 19, 2026These summaries describe recorded coverage in this saved dataset. This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Reported company sizes
817 records in the displayed employee bands.
1 matching records are outside the displayed bands or do not have a displayed size. Bars show shares of the displayed bands.
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 818 companies.
How this company list was built
Describe a niche in your own words: companies installing commercial solar, or manufacturers of sustainable packaging. RevenueBase SmartSearch finds companies whose compiled business descriptions match by meaning. This list is one saved example to adapt.
Where the company descriptions come from
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
RevenueBase SmartSearch matching settings
- Exact
- Closest fits to the business described.
- Similar
- Similar businesses with a wider range of fits.
- Related
- Related businesses in and around the category.
- Broad
- A broader set of businesses connected to the description.
RevenueBase SmartSearch · Exact match identifies inclusion in this search's closest semantic matching setting. It is not a per-company confidence score, a literal keyword match, or a quality endorsement.
Selection, ordering and scope
The public list shows selected company records with contact and verified-email coverage. Reported employee bands provide separate company-size context.
This page is derived from saved source records; per-contact mobile coverage and email-recency results are not established by this snapshot.
Recorded company descriptions support research; check company websites for current services. The selected preview is ordered by tracked contacts and is not a list of the best service providers.
Snapshot: September 19, 2026.
RevenueBase is a B2B data infrastructure company. Its September 3, 2026 published methodology describes a graph of 60 million companies and 398.9 million professional contacts; these platform figures differ from this page's totals. Published methodology ↗
Cleantech accelerators by metro
Questions about this company list
What does Exact match mean for cleantech accelerators?
The separate RevenueBase SmartSearch column identifies inclusion at the closest semantic matching preset. It is not a literal keyword match, a per-company confidence score or a quality endorsement. Changing the search form opens a new search in RevenueBase; it does not reclassify these saved rows.
How many cleantech accelerators did RevenueBase find based in the United States?
The saved snapshot records 818 matching company records, 11,696 tracked contacts and 2,828 verified emails. The public preview displays 25 selected records.
Where do the company descriptions come from?
RevenueBase compiles company information from public sources, including company websites and public professional profiles such as LinkedIn, alongside information supplied by companies. The short recorded excerpt shown here is separate from the complete business description used for matching; individual source URLs and collection dates are not provided in this public snapshot.
How are the public companies ordered?
The selected public records are ordered by contacts tracked in RevenueBase, highest first. Contact coverage is a prospecting measure, not an assessment of the company's services or quality.
How can I get contact information?
Select a company's contact count to open its filtered contacts in RevenueBase. Free signup is required and includes 500 credits and limited free results. Verified emails, direct dials and mobile numbers depend on available coverage.
How current is this list?
Snapshot: September 19, 2026. Review each company's website for current services and locations. A recorded business description does not establish that every company offers every service named in the search.
What do headquarters and employee bands mean?
These are recorded company-level fields, rather than a map of every branch or a count of specialists. Missing headquarters or employee bands are labeled; older records may show a location separately from recorded headquarters.
Build your next target company list
Adapt this niche search and work with available contacts in RevenueBase.
Related lists
Cleantech accelerators by geography
- Cleantech accelerators based in Houston, United States
- Cleantech accelerators based in New York, United States
- Cleantech accelerators based in San Francisco, United States
- Cleantech accelerators based in Australia
- Cleantech accelerators based in Belgium
- Cleantech accelerators based in Brazil
- Cleantech accelerators based in Canada
- Cleantech accelerators based in Denmark
- Cleantech accelerators based in France
- Cleantech accelerators based in Germany
- Cleantech accelerators based in India
- Cleantech accelerators based in Israel
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Cite this list
RevenueBase Data Team. Top 25 cleantech accelerators based in the United States. Snapshot: September 19, 2026. https://revenuebase.ai/companies/cleantech-accelerators/united-states.
This is a selected public preview of saved company records, rather than an independently verified census. Open the source page ↗
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