The companies on the ground
Three challenge partners and two tool partners. Reps are physically at Startup Sauna across the weekend — find them at the partner lounge or DM them on Discord.
Finnish fintech founded 2018. Finland's leading loan-comparison platform — €17.2M revenue in 2025, ranked on the FT1000 2026 list of Europe's fastest-growing companies. Partnered with 40+ banks and financial institutions, reaching 100k+ users and processing ~35k applications per month.
View challenge brief →
Helsinki-born, $100M+ ARR. Managed open-source data infrastructure across every cloud that matters — 200,000+ VMs, databases, streaming, pipelines. 10 services across 5+ clouds, founded 2016.
View challenge brief →
The Second Brain for modern accounting. Trusted by 4,300+ professionals across 7 EU countries. Ingests official regulation, keeps it in sync, exposes it through an LLM-native interface.
View challenge brief →
Vibe-code your frontend. Every participant gets 200 free credits. Opt-in tool track: best use of Lovable wins an honorable mention.
View tool + redemption →
Serverless inference for any HuggingFace model. Every participant gets Featherless credits. On top of that: $300 / $150 / $75 prize tiers awarded by organizers to the 1st / 2nd / 3rd challenge winners.
View tool + redemption →