World's Largest Hermes Buildathon I London 🇬🇧
​Join the London edition of the World’s Largest Hermes Buildathon.
​Backed by OpenAI, Convex, Cloudflare, ElevenLabs, Linkup, Dodo Payments, & Wispr Flow. Proudly presented by GrowthX.
​This is not a regular buildathon. You will build, launch, get users, and chase revenue in 8 hours.
​Who is this for?
​AI-first engineers
​Founders
​Product leads
​Growth engineers
​Forward-deployed engineers
​GTM and growth operators
​Meet Our Partners
​OpenAI is the AI Partner for The World's Largest Hermes Buildathon, giving thousands of builders across 10 cities free API credits to prototype and ship AI agents on GPT-5.5.
​Convex is the Database Partner, giving builders real-time sync, backend functions, workflows, and vector search so they skip backend plumbing and ship faster.
​Wispr Flow is the Dictation Partner, letting builders dictate prompts, PRDs, docs, and implementation plans far faster than typing. In an 8-hour buildathon, teams move at the speed of thought.
​ElevenLabs is the Voice Partner, giving agents a voice, personality, and real conversational ability through voice cloning, low-latency responses, and multilingual support.
​Cloudflare is the Hosting Partner, taking products from laptop to live in minutes with global deployment, AI Gateway observability, and usage tracking.
​Linkup is the Web Search Partner for The World’s Largest Hermes Buildathon, giving builders real-time web search for AI agents through a single API.
​Dodo Payments is the Payments Partner for The World’s Largest Hermes Buildathon, helping builders start accepting payments in under 5 minutes.
​Meet your hosts
​Yogi G.
​Yogi G. has led marketing, partnerships, and GTM across Canva, RocketHub, and Amaze, working with companies like Stripe, NVIDIA, Google, and Intel. He sits at the intersection of brand, distribution, ecosystem building, and strategic partnerships. For builders, he brings the part most hackathons miss: how to make what you build matter outside the room.