Kiroween 2026 Featured Online Build something wicked and git commit to the darkness. $100,000 in prizes Dec 04, 2026 05:00 PM EST to submit 10923 participants
HackUTD 2026: ZeroDay Richardson, TX, USA Welcome to ZeroDay...The City Needs You Non-monetary prizes Nov 7 – 8, 2026 1064 participants
Codex x TwitchCon Hackathon Online Build for streamers and their community on Twitch with OpenAI Codex. $25,000 in prizes, and the top 5 are shown on the Codex Booth stage at TwitchCon. $25,000 in prizes Winners TBD 2217 participants
Girls Hoo Hack 2026 Charlottesville, VA, USA Girls Hoo Hack is a gender-inclusive, women-centered hackathon that is focused on promoting innovation while celebrating diversity. Non-monetary prizes Oct 17 – 18, 2026 128 participants