AETHRA GLOBAL GAMETHON 2025 Online Level Up. Create. Impact. Non-monetary prizes Winners announced 226 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 4981 participants
Proof of Concept Online If you could prove any data on the internet - what would you build? $25,000 in prizes Winners announced 1909 participants
Fun and Games with Devvit Web Online Create a new game or experience for the Reddit community! $49,000 in prizes Winners announced 2610 participants
Code with Kiro Hackathon Online A challenge for developers to explore Kiro, an AI IDE that works alongside you to turn ideas into production code with spec-driven development. $100,000 in prizes Winners announced 9970 participants
OpenAI Open Model Hackathon Online Build with gpt-oss, OpenAI’s open weight reasoning models. $30,000 in prizes Winners announced 8655 participants
DevNetwork [API + Cloud + Data] Hackathon 2025 Santa Clara, CA, USA Join the nation's largest challenge-driven API + Cloud + Data hackathon @ API World 2025! $2,000 in prizes Aug 17 – Sep 5, 2025 717 participants
![DevNetwork [API + Cloud + Data] Hackathon 2025](http://d112y698adiu2z.cloudfront.net/photos/production/challenge_thumbnails/003/328/173/datas/medium.jpg)