Accelerator · Washington, United States
Halcyon is a Washington, DC organisation running themed accelerators for impact-driven ventures in climate, health and EquityTech. Programmes mix virtual sessions with two one-week in-person residencies and pay stipends.
Funding not published · equity not published
Accelerator · London, United Kingdom
London tech for good investor that puts £60,000 into early-stage startups tackling social and environmental problems, followed by a six-week hybrid programme and six more weeks of coaching.
£60k invested · equity not published
Accelerator · Honolulu, United States
A Honolulu accelerator for scalable tech startups in software, gaming, travel tech, sustainability and ocean tech. The 12-week programme invests US$25k to US$100k on a SAFE, with follow-on capital reserved.
Funding not published · equity not published
Accelerator · United States
A nonprofit accelerator for cleantech startups that runs regional programmes across the US over five months. Teams pay a participation fee; regional and national winners share cash prizes and investment.
Funding not published · equity not published
Accelerator · Honolulu, United States
A climate investor and accelerator with offices in Honolulu, New York, Washington DC and San Francisco. Its Strategy Track serves pre-seed and seed teams; its Project Track funds first-of-a-kind projects for Series A and later.
Funding not published · equity not published
Accelerator · United States
An accelerator for tech nonprofits that have built at least a minimum viable product. Each organisation receives at least US$25k in unrestricted funding, and the programme ends with demo days.
Funding not published · equity not published
Closed2027 Accelerator: applications opened 17 August 2026 and closed 7 September 2026.