Who funds them, what they fund and how to apply.
Base runs its own retroactive Builder Grants (1-5 ETH per shipped project, 20+ cohorts since 2024) for developers shipping live on the Base mainnet; note this is distinct from Coinbase Developer Platform's separately-registered CDP Builder Grants program, so check for overlap before promoting.
Community-voted retroactive funding for XRPL contributors, run by XRPL Commons since October 2025.
In 2025, Retro Funding sharpens its focus on data-driven impact measurement , using targeted Missions to develop robust methods for evaluating specific types of contributions. The Retro Funding Missions from S7, Onchain Builders and Dev Tooling, will continue in S8.
Retro Funding Mission rewarding developer tooling that has already delivered measurable impact to the Optimism Collective and Superchain ecosystem, distributing up to 8M OP in H1 2025. Builders join via rolling application windows with metrics-driven evaluation; the Season 8 Measurement Period 11 results list 26 rewarded projects.
Retro Funding Mission rewarding onchain applications that have already delivered measurable, provable impact to the Optimism Collective and Superchain, with demonstrated significant adoption. Builders join via rolling application windows and rewards in OP are computed with metrics-driven evaluation; the Season 8 Measurement Period 11 results list 123 rewarded projects.
Filecoin RetroPGF Round 3 concluded after distributing 585,000 FIL to public-goods projects.
Special thanks to members of the Feedback Commission for discussion and review. In 2025, Retro Funding will focus on data-driven impact measurement with a human-centered approach. These Missions have been chosen to focus the Collective on being able to accurately measure an important sub-set of contributions.
Retroactive funding for projects built on Avalanche C-Chain and Avalanche L1s, run in recurring tracked rounds; community leaderboard voting is advisory, the Avalanche Foundation makes final award decisions.
A completed Q1 2026 retroactive Zcash funding round for public goods and ecosystem contributions. Coinholders reviewed proposals for completed work before final funding decisions.
Status describes whether a program is running. Application methods are recorded separately. Read the funder’s terms before applying.