Who funds them, what they fund and how to apply.
Arbitrum Open House London combined a three-week online Buildathon with a three-day Founder House, technical workshops, mentorship, product sessions, and live pitches. The combined prize and grant pool was $415,000 across general, Robinhood Chain, agentic AI, and milestone-based grant tracks.
Base announced Base Batches 003 as a funding and mentorship program for onchain builders, with Startup, Student, and Robotics tracks and up to $50,000 in funding per selected participant. The recorded Startup Track application window closed in March 2026; no current general application page has been confirmed.
A ten-week, equity-free accelerator for North American pre-seed through Series A startups using AI in energy systems. The 2026 cohort focuses on grid optimization, demand flexibility, energy affordability, and carbon-aware infrastructure, with Google mentorship, technical support, product access, and eligible cloud credits. Applications closed June 30, 2026.
Four-month accelerator providing $50,000 plus mentorship and technical workshops to early-stage teams building proof-of-concept digital financial services for underserved populations using Open Payments and the Interledger Protocol.
Mantle previously ran Flagship Buildathon programs and a Scouts nomination season. The former grants URLs now serve Mantle's institutional RWA marketing site and no longer describe a public grant or apply path. Scouts Season 2 closed 30 June 2025.
Accelerator for startups building DeFi, payments, and RWA products on Stellar or for EMEA; up to $150,000 in XLM initial development funding from the Stellar Development Foundation, with possible follow-on grants.
Milestone-based accelerator funding up to $200k/team for pre-token Sui projects, co-run by Brinc and CoinList. The first cohort application window closed January 17, 2025. No later cohort has opened.
Surplus is an incubator for software startups, organized by Manifund and Mox — to create massive public good in the age of transformative AI. It’s a 3 month program, starting late July in SF. We provide seed funding, advice, peers, intros, and space to focus. Apply here by June 24!
World Build 3 supported founders building World apps on OP Mainnet with grants of up to $200,000, travel support, and mentorship. Applications for this cohort closed on April 23, 2026.
Status describes whether a program is running. Application methods are recorded separately. Read the funder’s terms before applying.