OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46686 participants
Hack&Roll 2026 Singapore, Singapore Singapore's largest student-run hackathon Non-monetary prizes Jan 17 – 18, 2026 614 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 4967 participants
TikTok TechJam 2025 Online Build With Joy, Code For Change $22,500 in prizes Winners announced 2316 participants
.HACKathon Singapore, Singapore Build what you wish existed — for students, by students! Non-monetary prizes Aug 1 – 2, 2025 176 participants
