HackNotts '26 Lenton, United Kingdom HackSoc's 13th annual hackathon! Non-monetary prizes Oct 25, 2026 143 participants
OpenAI Build Week Online Join a global week of building with Codex $100,000 in prizes Winners announced 46670 participants
Google Cloud Rapid Agent Hackathon Online Building Agents for Real-World Challenges $60,000 in prizes Winners announced 14431 participants
Agents Assemble - The Healthcare AI Endgame Online Build Interoperable Healthcare Agents at the Intersection of MCP, A2A, and FHIR $25,000 in prizes Winners announced 4290 participants
HackBelfast Belfast, United Kingdom Largest Hackathon In Northern Ireland £14,200 in prizes Apr 25 – 26, 2026 47 participants
GitLab AI Hackathon Online You Orchestrate. AI Accelerates. $65,000 in prizes Winners announced 6921 participants
Amazon Nova AI Hackathon Online Build your way with Amazon Nova $40,000 in prizes Winners announced 13402 participants
HackSussex 2026 Falmer, United Kingdom An in-person hackathon taking place at the University of Sussex, UK. £200 in prizes Feb 28 – Mar 1, 2026 267 participants
HackLondon 2026 Greater London, United Kingdom The annual hackathon of the world's greatest city. Hosted by KCL and UCL Non-monetary prizes Feb 21 – 22, 2026 230 participants
