For founders

Bring your idea. Feel what building it is really like.

Play solo with an AI co-founder, or as a team with two opinionated AI teammates.

Customer interviews

Five AI customers. They only tell the truth when you ask good questions — leading questions get polite lies.

Experiment lab

Smoke tests, concierge MVPs, pricing tests, pre-sales. Each costs runway; results follow the hidden truth.

Runway gauge

Cash, burn and weeks left, always visible. Run out and the venture dies.

Inbox & team chat

Your investor emails you weekly. Your AI teammates disagree with each other.

Weekly decisions

Every week ends with a decision and a rationale. The world remembers.

Investor panel

Three investors with different lenses grill your traction and your decision story.

  1. Phase 000

    Setup

    Bring your idea. Meet your market, your investor, your mentor — and get your starting capital.

  2. Weeks 1–201

    Discover

    Interview AI customers, hunt for a real problem, form first hypotheses.

  3. Weeks 3–402

    Build & Test

    Run cheap experiments, spend runway, read evidence. A shock hits — pivot or persevere.

  4. Week 503

    Pitch

    Face the AI investor panel with traction, evidence and the story of your decisions.

  5. Outcome04

    Founder report

    Scored on decision quality and learning velocity, with the evidence trail to prove it.

Your idea vs. a market that doesn't care.

Five simulated weeks. Real decisions. A report that shows how you think.

Enter the Arena