11-12 February 2026
Strawberry Arena, Stockholm (at the Techarena 2026 event)
BuildArena
Building the companies of the future in 12 hours
BUILDARENA
The hackathon where builders create not just products but real companies
A new type of hackathon is coming to Stockholm this February. BuildArena is a twelve-hour build marathon where 24 teams of Europe’s leading developer talent compete and use AI to solve real, predefined challenges from major corporations. Finalist teams will pitch live on stage in front of thousands of spectators. The result is finished, launch-ready products.
- Date: February 11–12, 2026
- Location: Strawberry Arena, Stockholm (part of Techarena 2026)
- Format: 12-hour hackathon, three industry tracks predefined by major corporations and partners, 24 teams compete with Europe's best developers
- Organizers: Techarena, Lovable, Project Europe, Inflection, European Defense Tech Hub, and BuilderBase
- Results: Company sold for $20,000 the same day, startup that reached unicorn valuation, ShiftNex to $1M ARR in five months12, 2026
- Previous results: Company sold for $20,000 the same day, startup that reached unicorn valuation, ShiftNex to $1M ARR in five months
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