Healthcare AICancerDiabetesMaternal & child health
- Host
- Reskilll
- Online
- Yes ✓
- Cost
- Free
- Register by
- Sep 28, 2026
- Submit by
- verify on site
- Duration
- verify on site
- Prizes
- verify on site unverified
- Certificate
- verify on site
Fit India-based, online and free — point your Claude-API skills at real health problems (cancer, diabetes, maternal health). Two catches: it's framed as doctors + technologists co-creating (you may need a clinical partner), and registration closes ~28 Sep, so it's now-or-never. Details are thin — confirm on site.
Voice AIVoice agentsAgents
- Host
- AssemblyAI × lablab.ai
- Online
- Yes ✓
- Cost
- Free
- Register by
- Open through the build window (verify on site)
- Submit by
- Sep 30, 2026
- Duration
- Sep 1–30, 2026 (fully online)
- Prizes
- $10,000 — $5,000 cash + $5,000 AssemblyAI credits
- Certificate
- verify on site
Fit Real cash, fully online, and you can still use the Claude API as the agent's brain while AssemblyAI handles the voice layer. Biggest catch: it closes 30 Sep — only a few days out — so jump only if you can ship a voice-agent demo fast, and you must build on AssemblyAI.
Coding agentsSoftware automationDev tools
- Host
- WeAreDevelopers × BAND
- Online
- Yes ✓
- Cost
- verify on site
- Register by
- verify on site
- Submit by
- Oct 6, 2026
- Duration
- Sep 26 – Oct 6, 2026 (virtual, global)
- Prizes
- verify on site unverified
- Certificate
- verify on site
Fit Fully virtual and on-theme (a 'band' of coding agents that plan, build and self-check), solo-doable. The catch: you must build inside BAND Desktop (their platform), not your own stack, and prize/entry details aren't posted — verify on site before committing.
AI agentsAutonomous agentsReasoningAgent context
- Host
- GenAI.Works
- Online
- Yes ✓
- Cost
- Free
- Register by
- Oct 13, 2026
- Submit by
- Oct 20, 2026
- Duration
- 144-hour build window (Oct 15–20, 2026)
- Prizes
- Up to $20,000 across scored criteria
- Certificate
- verify on site
Fit Cleanest fit on the board: fully online, free, solo-allowed (teams of 1–5), and explicitly model-agnostic — closed models and paid APIs are permitted, so build the agent on the Claude API. Real cash and a tight 6-day sprint that rewards your ship-fast style. Only catch: the strongest tracks lean on sponsor tech (NVIDIA/Zetaris), so read the track rules before picking one.
Open sourceGeneral buildAI (allowed)
- Host
- Major League Hacking (MLH)
- Online
- Yes ✓
- Cost
- Free
- Register by
- verify on site
- Submit by
- Oct 15, 2026
- Duration
- Oct 9–15, 2026 (online week)
- Prizes
- verify on site (GHW is typically swag/giveaways, not cash) non-cash
- Certificate
- verify on site
Fit The reliable free, online, global MLH build week — Hacktoberfest edition, open-source themed. Great for a fast Claude-API demo you can reuse, but rewards are swag/community, not cash. Register via ghw.mlh.com and confirm the exact event page.
AIAI on GPUsHigh-performance AI
- Host
- AMD × lablab.ai
- Online
- Yes ✓
- Cost
- Free
- Register by
- verify on site
- Submit by
- Oct 18, 2026
- Duration
- Online build 12–18 Oct 2026 (hybrid)
- Prizes
- $5,000+ prize pool
- Certificate
- verify on site
Fit Online build phase, free, with cash on the table — but it's built around AMD GPUs/ROCm infrastructure, off your Claude-API + web edge. Worth it only if you want to stretch into GPU/infra work; otherwise it's a weaker use of a sprint.
AI agentsSandboxed agents
- Host
- Vultr × lablab.ai
- Online
- Yes ✓
- Cost
- verify on site
- Register by
- verify on site
- Submit by
- Nov 8, 2026
- Duration
- Online build 3–8 Nov 2026 (hybrid finale)
- Prizes
- verify on site unverified
- Certificate
- verify on site
Fit AI-agents theme fits you and there's an online build phase, but it's hybrid with an on-site finale (8 Nov) and expects agents 'sandboxed on Vultr' infra; prize pool and entry cost aren't posted. Tentative until you confirm an online-only path on site.
Beginner-friendlyGeneral buildAI (allowed)
- Host
- Major League Hacking (MLH)
- Online
- Yes ✓
- Cost
- Free
- Register by
- verify on site
- Submit by
- Nov 12, 2026
- Duration
- Nov 6–12, 2026 (online week)
- Prizes
- verify on site (swag/community, not cash) non-cash
- Certificate
- verify on site
Fit Same free/online/global MLH format, beginner-friendly Builders Week. A low-stakes momentum build; swag not cash. Confirm the exact event page on ghw.mlh.com nearer the date.
No hackathons match your filters.