DiamondHacks 2026 San Diego, CA, USA San Diego's Largest Hackathon $25,710 in prizes Apr 4 – 5, 2026 366 participants
DeveloperWeek 2026 Hackathon San Jose, CA, USA Join the nation's largest challenge-driven in-person and online hackathon @ DeveloperWeek 2026! $23,000 in prizes Feb 2 – 20, 2026 1808 participants
DAHacks 4.0 Cupertino, CA, USA Join Cupertino’s biggest collegiate hackathon! Non-monetary prizes Nov 21 – 22, 2025 124 participants
Cal Hacks 12.0 San Francisco, CA, USA This year's Cal Hacks is co-hosted by Claude, Fetch AI, AppLovin, and Amazon's Annapurna Labs! Together we'll assemble in SF for a weekend of hacking, friendship, and crazy ideas. $58,100 in prizes Oct 24 – 26, 2025 2164 participants
