TreeHacks 2026 Stanford, CA, USA The largest collegiate hackathon in the US. $1,030,875 in prizes Feb 14 – 15, 2026 1097 participants
xAI Hackathon 2025 Palo Alto, CA, USA Join us for a 24-hour hackathon to build the next generation of AI applications Non-monetary prizes Dec 7, 2025 352 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
SFTW Hackathon @ Berkeley Berkeley, California, USA SFTW Hackathon @ Berkeley $19,000 in prizes Oct 10, 2025 59 participants
Claude Speedrun Hackathon @ Berkeley Berkeley, California, USA 2-hour speedrun hackathon to build and ship fast, using Claude $1,000 in prizes Apr 30, 2025 38 participants
TreeHacks 2025 Stanford, CA, USA The largest collegiate hackathon in the U.S. $255,600 in prizes Feb 14 – 16, 2025 827 participants
Cal Hacks 11.0 San Francisco, CA, USA This year's Cal Hacks is co-hosted by Google and Fetch.ai. Together we'll assemble in SF for a weekend of hacking, friendship, and crazy ideas. $188,960 in prizes Oct 19 – 20, 2024 1140 participants
HackHarvard 2024 Cambridge, MA, USA Hack 4 Impact $6,250 in prizes Oct 11 – 13, 2024 512 participants
PennApps XXIII: Sustainability Philadelphia, PA, USA The world's original hackathon is back in-person! Get ready for a fun-filled weekend with a sustainability twist. $26,000 in prizes Sep 2 – 4, 2022 217 participants
HackUNT2022 Denton, TX, USA From Cadet to Captain we accept all levels of attendees. We are excited to have you with us! $11,500 in prizes Apr 23 – 24, 2022 149 participants
SD Hacks 2022 Online San Diego's Largest Hackathon $5,094 in prizes Winners announced 95 participants
