For professionals · Investors
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Decidi for investors
Kill the deal on paper before you wire the money.
Stress-test your work free 1,500 free credits · no sign-up, no card
Run the bear case as hard as the bull case, so your conviction is earned — not borrowed from a founder’s deck or a single model’s optimism.
Why investors use it
- Build the bear case in full: the strongest argument for why this returns zero, argued by someone trying to win.
- Pressure-test the founder’s numbers and TAM math against an independent model that isn’t rooting for the round.
- Surface the diligence question you’d be embarrassed to have missed at the partner meeting.
- Get a second and third opinion that genuinely disagree — instead of one chatbot agreeing with whatever you frame.
- Stress-test the thesis against base rates, comparable failures and the part of the market you can’t see from the deck.
- Rehearse the IC memo: the objection a sharp partner raises before they pass.
Stress-test before you ship
- The investment thesis — the strongest reason it’s wrong
- The financial model and the assumptions hidden in row 200
- Market size — TAM that survives a skeptic, not a slide
- Founder and team risk — the thing references won’t say
- The cap table, terms and downside protection
- The IC memo — the partner-meeting objection
Adversarial passes we run
Bear-case constructionTAM & numbers auditDiligence-gap sweepBase-rate reality checkIC-objection rehearsal
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1,500 free credits · no sign-up, no card