Accelerators for Climate & Impact Startups

How we select: Organizations below follow Causeartist editorial standards. Directory membership does not purchase ranking. Last reviewed October 2026.

Start with accelerator funders in the Causeartist directory, then filter by sector on profile pages.

Directory shortlist

• 100x Impact Accelerator — 100x Impact Accelerator focuses on backing impact ventures that have the potential to improve hundreds of millions of lives and achieve deep systems-change. The…
• Accelerating Asia Ventures — Accelerating Asia invests in pre-seed and seed-stage startups across Southeast and South Asia that demonstrate strong fundamentals, capital efficiency, and regi…
• Acumen — Acumen funds high-innovation, high-impact enterprises that have the potential to shape markets and break the cycle of poverty. They invest across key impact sec…
• Adaptation Fund Climate Innovation Accelerator — AFCIA is looking for high-impact, scalable climate-adaptation solutions that can be implemented with WFP country offices and local ecosystems—not idea-stage res…
• AirMiners — AirMiners invests in and supports early-stage startups focused on carbon dioxide removal technologies. Through its accelerator and investment fund, the organiza…
• AlphaLab — AlphaLab focuses on high-growth startups across four main sectors: software, hardware, life sciences, and robotics. They provide accelerator support through spe…
• Antler — Antler's pre-seed funds invest at inception after intensive residency and cofounder matching, typically writing $100K–$200K checks. Antler Elevate provides scal…
• Circular Valley — Circular Valley believes the circular economy is fundamental to aligning economic growth with environmental protection. The organization supports entrepreneurs …
• Creative Destruction Lab Climate — CDL Climate focuses on pre-seed to seed stage deep tech startups developing massively scalable climate technology solutions. The program targets science- and te…
• EIT Climate-KIC — Climate-KIC focuses on catalyzing systemic change for climate action through innovation, radical collaboration, and place-based approaches. They prioritize comp…
• Entrepreneurs First — EF invests early and on founder-friendly terms: an equity-free grant during ideation, up to $250K once a company forms, and up to $5M in follow-on through later…
• Fashion for Good — Fashion for Good focuses on funding and supporting innovators developing solutions across five key focus areas: next-generation materials, tier 2 decarbonizatio…
• Fast Forward — Fast Forward believes technology can become one of the most powerful tools for social impact when built and deployed by mission-driven organizations. The accele…
• Finance Earth — Finance Earth believes that large-scale environmental restoration and climate action require significantly more private investment than can be provided by gover…
• Free Electrons — Free Electrons focuses on energy technology startups developing breakthrough solutions that can be piloted and scaled through partnerships with global utilities…
• gBETA Social Impact — gBETA Social Impact specifically targets startups and emerging nonprofits that are building products or services addressing equity in education or criminal just…
• Green Accelerator — Green Accelerator does not operate as a conventional venture fund. It deploys philanthropic and donor capital earlier than commercial investors will typically g…
• Greentown Labs — Greentown Labs focuses on supporting climatetech entrepreneurs developing technologies that transform how society thinks about, engages with, and uses energy. T…
• Halcyon — Halcyon focuses exclusively on serving impact-driven entrepreneurs with ventures in three key verticals that drive equity and inclusivity in society: Climate, H…
• Imagine H2O — Imagine H2O backs water entrepreneurs with scalable solutions addressing four key impact areas: tackling climate change, expanding water access, advancing resou…
• IndieBio — SOSV's mission is to fund amazing deep tech founders right at inception—often their very first check. SOSV's General Partners work side-by-side with founders to…
• Interledger Foundation — The Interledger Foundation funds projects that make payment systems more open and useful for people who are underserved by traditional financial services. Its g…
• MassChallenge — MassChallenge invests in rare entrepreneurs with the grit to tackle the world's hardest problems across five strategic challenge areas. They focus on scaling so…
• Miller Center for Global Impact — Miller Center focuses on supporting social entrepreneurs and social enterprises that are developing solutions to address poverty and achieve the United Nations …

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Climate tech funders

Updated October 2026. Corrections: Contact.