The Revenue Engine Hackathon: Berlin Edition

A one-day, application-only GTM hackathon at HubSpot Tower Berlin for 15 early-stage startup teams. Each team builds its own revenue engine on its own data, ICP and processes, with hands-on support from HubSpot, Clay, Lemlist and OpenAI experts and Codex as the build partner through the day. Arrival from 08:30, then sprints starting with a HubSpot CRM and revenue operations block, ending with demos and awards from 16:15 to 17:00. The winner gets two tickets and a €2,000 travel stipend to a European startup conference. Teams also get trials and credits from the four partners. Apply via HubSpot for Startups. Why go: a structured day to get a working CRM and outbound setup in place with expert help. Best for seed-stage teams without a GTM stack yet, as long as you're happy building on the partners' tools.