OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46685 participants
HackUPC 2026 Barcelona, Spain BarcelonaTech student Hackathon. 700 hackers, 36 hours of coding. Dream it. Hack it. Ship it. Non-monetary prizes Apr 24 – 26, 2026 588 participants
hackaTUM 2025 Garching bei München, Germany The show goes on. Non-monetary prizes Nov 21 – 23, 2025 752 participants
