Hackathons for founders in San Francisco

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The San Francisco events worth planning around, at a glance.

US October 2026

October 2026

40 events

28 Startup Speedrun Hackathon 09:00 · Hackathon AI Agents for Data Teams: A Practical Mini-Hackathon 17:00 Pebblebed's Builders Late Night Café 19:30
29 The AI Conference Hack Day 2026 09:30 · Hackathon Collaborative Agent Hackathon @ Stanford 09:30 Rebuild With Jev #3: Decision Bot Architecture + Hackathon 16:00
30 Agent Hackathon 10:00 · Hackathon Agentic AI Hackathon: AWS Community Day Bay Area 2026 16:00 Neighborhood Innovation Hack Night 18:00
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2 Real-Time Video Agents Hack - SF 09:30 · Hackathon
3 The AI Commerce Gallery - Hackathon | Walt Disney Family Museum 09:00 · Hackathon The Multiplayer Coding Hackathon 09:00 Supabase Select 2026 Hackathon 09:00
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5 Automate Your SF Tech Week with n8n 18:00 · Hackathon
6 Ship an AI Voice Agent w/ Modulate, Tavily & Plivo 17:30 · Hackathon
7 Zero Human Startup Hackathon | #SFTechWeek 11:00 · Hackathon Build Personal AI with Coding Agents - #SF TechWeek 12:00 "Build an Agent" Hackathon 14:00
8 Everesteer Hedge Fund Hackathon: San Francisco #SFTechWeek 17:00 · Hackathon Vibe Night - Come Cook with Us at OBC 17:00 Codex Build Night: Agents Everywhere — Luma RSVP Required 17:30
9 Cyberdefense Hackathon 09:30 · Hackathon Build It Anyway: Signal Hunt with Apify | SF Tech Week Hackathon for Non-Technical Builders 09:30 Builders & Brews SF 16:00
10 BUILD FOR HER 💕💻A WOMEN’S SOCIAL IMPACT HACKATHON #SFTechWeek 09:00 · Hackathon Multiplayer Hackathon by Party (Peninsula) 09:30
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12 Build AI agents that own their inference - #SFTechWeek 09:30 · Hackathon Company Brain Hackathon: Build an AI Agent That Knows Your Organization 12:30 San Francisco | Claude for Games 17:00
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14 Fast Forward 10:00 · Hackathon
15 Out Of The Box Open Source Developers Ctrl+Space Demo Night SF: AR/VR apps built in React Native 17:30 · Hackathon San Francisco Hackathon Prep and Pizza Social 20:30
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17 San Francisco | Physical AI for Science Impact Lab 09:30 · Hackathon Build Something AI Cannot Do Alone @ Cal 12:30
18 Bio-Data Hackathon Demos + Prizes at SPC 16:30 · Hackathon
Maritime Dual-Use Hackathon ExecuTorch Hackathon
19 Universal Celebration Hackathon 09:30 · Hackathon Universal Hackathon - Create Your Own AI Workforce | AWS Builder Loft 09:30 Cline, Parallel, & Composio Hackathon 11:00
20 Multiplayer Build Night & Mixer by Party (Peninsula) 18:00 · Hackathon
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23 Beta Fund X AWS X OpenAI Multi-Model Hackathon 09:30 · Hackathon
24 Robotics Hardware Hackathon: Saturday Robotics × Robotics Center. SF 10/24 | Reading Club #35 09:00 · Hackathon Win iPhone Duos at Patch the Conference Hackathon 09:00 Kane CLI Hack Day, supported by OpenAI 09:30
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Hack for Social Impact 2026
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28 [RESCHEDULED] Open Source Higgsfield: ComfyUI Dev Platform Build Night 15:00 · Hackathon ODSC AI x NEBIUS | Hackathon 09:00
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30 Night Hack by Founders, Inc. 16:00 · Hackathon
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About San Francisco · October 2026

Disrupt week winds down, and then a run of AI conferences and one big demo day takes over. GitHub Universe hits Fort Mason Oct 28 with agent launches, then AI Engineer Code Summit (Nov 10) and Cerebral Valley (Nov 12) follow, both gated rooms. YC Demo Day on Dec 2 is the date seed funds have blocked. This week, catch Modal's AI Builder's Night and South Park Commons' Oct 16 fireside with Sunday Robotics' Tony Zhao.

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