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 4982 participants
Chroma Awards: AI Film, Music Videos, and Games Online An AI Film, Music Video, and Game Competition to Unite the Creative Community $191,500 in prizes Winners announced 5524 participants
Perplexity Hackathon @ London, UK Greater London, United Kingdom Create an internet-enabled project to inspire curiosity, seek knowledge, or reason through complex tasks. £8,000 in prizes Oct 17 – 18, 2025 86 participants
