OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners TBD 46776 participants
Reddit’s Games with a Hook Hackathon Online Join Reddit and Phaser to build incredible games for the Reddit community! $40,000 in prizes Winners TBD 3071 participants
GitLab Transcend Hackathon Online Intelligent orchestration, now with context. $20,000 in prizes Winners announced 1565 participants
Google Cloud Rapid Agent Hackathon Online Building Agents for Real-World Challenges $60,000 in prizes Winners announced 14473 participants
Reddit Mod Tools and Migrated Apps Hackathon Online Join Reddit to build moderation tools for the Reddit community! $45,000 in prizes Winners announced 3098 participants
Build with MeDo Hackathon Online Build creative applications with MeDo, no coding required. Push the boundaries of what you can create. $50,000 in prizes Winners announced 8361 participants
Learning Hackathon: Spec Driven Development Online Great AI projects start with great planning. Learn the process with Claude Code and apply it to yours. Non-monetary prizes Winners announced 1253 participants
GitLab AI Hackathon Online You Orchestrate. AI Accelerates. $65,000 in prizes Winners announced 6937 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 4973 participants
Cloud Run Hackathon Online Build applications with Cloud Run $50,000 in prizes Winners announced 3419 participants
Google Chrome Built-in AI Challenge 2025 Online Innovate with Intelligence: Build the Future of the Web with Gemini Nano and Chrome AI. $70,000 in prizes Winners announced 14057 participants
Plotly Analytics Vibe-a-Thon Online Create a data app with a dataset and Plotly Studio $1,750 in prizes Winners announced 1471 participants
