Kiroween 2026 Online Build something wicked and git commit to the darkness. $100,000 in prizes Dec 04, 2026 05:00 PM EST to submit 10642 participants
OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46658 participants
Kiroween Online Build something wicked for Kiroween, our annual Halloween-themed hackathon where developers dare to code in dark mode $100,000 in prizes Winners announced 4958 participants
Facebook Hackathon: Messaging Online Build messaging solutions that empower business conversations $7,000 in prizes Winners announced 1866 participants
