HackDavis 2026 Davis, CA, USA // create for social good_ Non-monetary prizes May 9 – 10, 2026 429 participants
UCI Design-a-thon 2026 Online UCI Design-a-thon is the largest collegiate design hackathon in Southern California, where participants design, prototype, and pitch a product in 3 days. $5,448 in prizes Winners announced 416 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
STEM Connect Hackathon Fall 2025 Online Join us for the 2025 STEM Connect hackathon (formerly SASEhack)! The STEM Connect hackathon is a beginner-friendly, hybrid hackathon open only to undergraduate college students. $3,600 in prizes Winners announced 259 participants
OpenAI Open Model Hackathon Online Build with gpt-oss, OpenAI’s open weight reasoning models. $30,000 in prizes Winners announced 8651 participants
Unite Hacks Oakland, CA, USA Innovate through Tech and Code $6,952 in prizes Oct 22, 2022 18 participants
