# Who Invests With Cleantech Open: 21 Co-Investors (2026) > The 21 investors that have backed two or more of the same startups as Cleantech Open, by kind: vc firms, accelerators and government funds. Source: https://millionrounds.com/portfolio-maps/cleantech-open-co-investors (Millionrounds; every figure on the page links to its filing or article) ## VC firms 11 - [*MC* Massachusetts Clean Energy Center](https://millionrounds.com/fund/massachusetts-clean-energy-center) - [MassVentures](https://millionrounds.com/fund/massventures) - [Techstars](https://millionrounds.com/fund/techstars) - [Katapult](https://millionrounds.com/fund/katapult) - [SOSV](https://millionrounds.com/fund/sosv) - [*MG* Meyer Global](https://millionrounds.com/fund/meyer-global) - [Climate Capital](https://millionrounds.com/fund/climate-capital) - [Red Cedar Ventures](https://millionrounds.com/fund/red-cedar-ventures) - [CDP Venture Capital](https://millionrounds.com/fund/cdp-venture-capital) - [Good Growth Capital](https://millionrounds.com/fund/good-growth-capital) - [SBXi Fund](https://millionrounds.com/fund/sbxi) ## Accelerators 6 - [MassChallenge](https://millionrounds.com/fund/masschallenge) - [Los Angeles Cleantech Incubator](https://millionrounds.com/fund/la-cleantech-incubator-laci) - [HAX](https://millionrounds.com/fund/hax) - [AcceliCITY powered by Leading Cities](https://millionrounds.com/fund/accelicity-powered-by-leading-cities) - [Luminate](https://millionrounds.com/fund/luminate-accelerator) - [SVG Ventures](https://millionrounds.com/fund/svg-ventures) ## Government funds 4 - [National Science Foundation](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) - [US Department of Energy](https://millionrounds.com/fund/u-s-department-of-energy) - [California Energy Commission](https://millionrounds.com/fund/california-energy) - [Innovation Works](https://millionrounds.com/fund/innovation-works) ## Segment by segment ### VC firms 11 investors - [*MC* **Massachusetts Clean Energy Center**](https://millionrounds.com/fund/massachusetts-clean-energy-center) VC firm United States 8 backed - [**MassVentures**](https://millionrounds.com/fund/massventures) VC firm United States 5 backed - [**Techstars**](https://millionrounds.com/fund/techstars) VC firm United States 4 backed - [**Katapult**](https://millionrounds.com/fund/katapult) VC firm Norway 3 backed - [**SOSV**](https://millionrounds.com/fund/sosv) VC firm United States 3 backed - [*MG* **Meyer Global**](https://millionrounds.com/fund/meyer-global) Investment firm - 2 backed - [**Climate Capital**](https://millionrounds.com/fund/climate-capital) VC firm United States 2 backed - [**Red Cedar Ventures**](https://millionrounds.com/fund/red-cedar-ventures) VC firm United States 2 backed ### Accelerators 6 investors - [**MassChallenge**](https://millionrounds.com/fund/masschallenge) Accelerator United States 6 backed - [**Los Angeles Cleantech Incubator**](https://millionrounds.com/fund/la-cleantech-incubator-laci) Accelerator United States 3 backed - [**HAX**](https://millionrounds.com/fund/hax) Accelerator United States 2 backed - [**AcceliCITY powered by Leading Cities**](https://millionrounds.com/fund/accelicity-powered-by-leading-cities) Accelerator United States 2 backed - [**Luminate**](https://millionrounds.com/fund/luminate-accelerator) Accelerator United States 2 backed - [**SVG Ventures**](https://millionrounds.com/fund/svg-ventures) Accelerator United States 2 backed ### Government funds 4 investors - [**National Science Foundation**](https://millionrounds.com/fund/nsf-small-business-innovation-research-small-business-techno) Government fund United States 23 backed - [**US Department of Energy**](https://millionrounds.com/fund/u-s-department-of-energy) Government fund United States 11 backed - [**California Energy Commission**](https://millionrounds.com/fund/california-energy) Government fund United States 3 backed - [**Innovation Works**](https://millionrounds.com/fund/innovation-works) Government fund United States 2 backed **How this map is made.** Every investor here has backed two or more of the same startups as Cleantech Open, in rounds we track. Grouped by kind, each ranked by how many startups it shares with Cleantech Open. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Portfolio map **Cleantech Open portfolio map** 82 startups · $353M](https://millionrounds.com/portfolio-maps/cleantech-open-portfolio-map)[Sector portfolio **Cleantech Open's Cleantech portfolio** 19 startups · $132M](https://millionrounds.com/portfolio-maps/cleantech-open-cleantech-portfolio)[Sector portfolio **Cleantech Open's Energy portfolio** 16 startups · $36M](https://millionrounds.com/portfolio-maps/cleantech-open-energy-portfolio)[Co-investors **Who invests with Y Combinator** 1,812 co-investors](https://millionrounds.com/portfolio-maps/y-combinator-co-investors)[Co-investors **Who invests with Plug and Play** 617 co-investors](https://millionrounds.com/portfolio-maps/plug-and-play-co-investors)[Co-investors **Who invests with Google for Startups** 216 co-investors](https://millionrounds.com/portfolio-maps/google-for-startups-co-investors) ## Raising from investors like Cleantech Open? 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