Reddit Mod Tools and Migrated Apps Hackathon Online Join Reddit to build moderation tools for the Reddit community! $45,000 in prizes Winners announced 3088 participants
Agentic Engineering Hack New York, NY, USA We’ve stacked real infra and real AI so your hack ships as a product, not a slide. In one sprint, build agents, copilots, and autonomous systems that actually work end to end. $6,500 in prizes May 23, 2026 205 participants
OpenAI Open Model Hackathon Online Build with gpt-oss, OpenAI’s open weight reasoning models. $30,000 in prizes Winners announced 8634 participants
Adobe Express Add-ons Hackathon Online Code. Connect. Grow your Business. $30,000 in prizes Winners announced 3313 participants
World’s Largest Hackathon presented by Bolt Online Build with AI for a shot at some of the $1M+ in prizes. $1,037,500 in prizes Winners announced 129559 participants
CodeQuest AI Hackathon Online Welcome to this year’s CodeQuest AI Hackathon! Our challenge for you is to create a project that utilizes AI in a unique way for social good. $786 in prizes Winners announced 359 participants