Find your cofounder
through action.
Most cofounder matching ends at a warm intro. Crucible doesn't. When two founders match, you're dropped into a 7-day build sprint — a shared, timed workspace where you prove fit through real work before you ever split equity.
"Shipped the matching API + auth flow. Tomorrow: wire the dashboard. Most aligned I've felt with anyone."
Compatibility, scored across
six dimensions.
Every profile is embedded into a 1,536-dimension semantic space. We weight six factors into a single, explainable compatibility score — so you understand why someone is a match.
Profile to partnership in
five moves.
Build your profile
Role, domains, commitment, timezone, and five working-style sliders. Plus a free-text "what I bring / what I need" that powers the semantic match.
Get embedded & scored
AI embeds your profile and the six-factor engine ranks every founder in the network against you — in milliseconds.
Review curated matches
A focused feed of your highest-fit founders with a full score breakdown. No infinite swiping — quality over volume.
Run a 7-day sprint
Both accept, and a shared workspace opens for one week. Daily updates, artifacts, and live presence. Ship something real, together.
Reveal & decide
Submit double-blind feedback. Neither sees the other's until both are in. Then decide: run another sprint, or explore other matches.
Reputation you earn.
Every sprint and every piece of feedback builds your Crucible Score — a portable, verifiable signal of how you actually show up as a partner. Not a résumé. A track record.
Stop dating. Start building.
Your next cofounder is one sprint away. The spring cohort is open now.