Who funds them, what they fund and how to apply.
Batch-based accelerator for seed-stage AI startups investing $250,000 on an uncapped SAFE plus large compute and tooling credit packages. Four batches totaling 85 funded companies to date; applications for Batch 4 are closed and no later batch is announced.
The Horizon Institute for Public Service opened the AI Rapid Response Fellowship on 2026-07-01, a funded fellowship placing AI security experts into US executive branch roles at $170K-$250K+. Applications close July 22, 2026.
AI x Animals Pooled Fund is a targeted, experimental pooled fund supporting projects that help animal advocates respond to AI. The 2026 request for proposals had more than $300,000 available, expected to support 5-20 projects, and prioritized advocate tools, field-building, and actionable research.
The Bureau of South and Central Asian Affairs posted the Artificial Intelligence for American Competitiveness and Economic Security (AI-ACES) in South Asia opportunity (#DFOP0018586) on grants.gov, with a deadline of August 2, 2026.
AISI's Alignment Project funded research to prevent advanced AI systems from behaving dangerously, intentionally or accidentally, with awards up to £1 million per project. Part of over £15M AISI has committed across three grant programs; closed with no current open applications.
AISI's Challenge Fund supported UK and international academic institutions and non-profit organizations researching safeguards, control, alignment, and societal resilience to advanced AI risk, with awards up to £200,000 per project. Closed with no current open applications.
Animal Microgrants was a 2026 funding-circle call for individuals and very small organizations working on farm-animal advocacy. Typical grants were £500-£2,500, with exceptional requests up to £5,000; applicants were expected to hear back by the end of March.
Aptos Foundation's Payment Grants provide up to $150,000 in milestone-based funding for MVP+ teams building wallets, APIs, compliance layers, payment rails, and other infrastructure for programmable payments on Aptos. The track is currently not accepting applications.
An Arbitrum Foundation program that subsidized third-party smart contract audits with $10M in ARB over 12 months. Applications opened 1 August 2025 and closed 31 July 2026. The Foundation has proposed a successor Arbitrum Security Program. That successor is not yet accepting applications.
Arbitrum DAO Grant Program offered milestone-based funding to builders, dApps, technical infrastructure projects, adoption initiatives, and community growth efforts on Arbitrum One and Arbitrum Nova. Season 3's active submission phase closed on March 17, 2026. The program then entered a lower-capacity phase for remaining application reviews, milestone checks, and disbursements through September 2026.
Arbitrum's DRIP incentive program completed Season 1 in February 2026. Season 2 remains paused while its committee evaluates strategy; the DAO extended the program mandate through July 1, 2027 without adding funding.
The Arbitrum Foundation Grant Program provided milestone-based funding for projects supporting Arbitrum adoption, technical infrastructure, and sustainable communities. Arbitrum's official grants directory now labels this specific program inactive and complete.
Arbitrum's 2026 Mentorship Program was an eight-week cohort for 15 early-stage teams, with ecosystem mentorship, investor access, and a $100,000 Demo Day award pool. The program began April 13, 2026 and its application and cohort period have ended.
Arbitrum's NYC Founder House concluded in March 2026 after selecting 88 teams from 473 applications. Fifty-five projects submitted builds and competed for $340,000 in prizes and grants.
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.
A one-time, DAO-approved incentive round that distributed roughly $50M in ARB across around 30 protocols on Arbitrum to bootstrap usage and liquidity. Recipients committed to incentive-distribution plans (e.g. liquidity mining, fee rebates) rather than open-ended grants; funded via an Arbitrum DAO governance proposal.
A follow-on, bridging round of the Short-Term Incentive Program that extended incentive funding to 39 protocols on Arbitrum after STIP Round 1 concluded, approved via Arbitrum DAO governance to avoid a funding gap while a longer-term incentive framework was designed.
A concluded Arbitrum Foundation program distributing 5M ARB worth of grants to projects building with Stylus, marked "Program Complete" on the Foundation's grants page.
Status describes whether a program is running. Application methods are recorded separately. Read the funder’s terms before applying.