Fair, explainable equity — powered by what you actually contribute
Own whatyou build.
The equity split · live now100.0% allocated
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How it works · 01—03no guessing
01
Log the work
Everyone logs what they actually put in — hours, cash, IP, sales, intros. The receipts, not the rhetoric.
02
Get a fair, explainable split
Fifty50 turns those contributions into a live equity split every founder can see and defend. No 50/50-by-default, no garage-day arguments.
03
Find who's missing
The marketplace matches you with the co-founder or builder your cap table is missing — folded into the same fair model from day one.
Equity should track contribution.
Not who shouted loudest.
Receipts, not rhetoric
Every slice traces back to logged work — hours, cash, IP, sales, intros.
A number you can defend
The split is live and explainable. No 50/50 defaults, no garage-day fights.
Not a securities product
Matching & equity-split only — no tokenizing, no success fees, no custody.
Agent-firstAPI · MCP · chat
A1
Your agent files the work
If an AI agent already logs what you build, it can input contributions straight into the split — a clean REST API with an OpenAPI spec, an agent tool manifest, and an MCP connector. Developer & agent docs →
A2
Humans just chat
No agent? Tell the in-app assistant what you did — “shipped the checkout flow, about six hours” — and it compiles the entry and files it when you confirm. No forms.
A3
Same fair engine either way
However the work arrives — agent, API, or a sentence in chat — the same scoring, co-sign and audit rules apply. Nothing mints equity without the rules passing.
The marketplacefind your missing piece
The missing co-founder problem.
Most teams stall on a gap they can't fill — a technical co-founder, a closer, an operator. Fifty50 matches you with builders on what your team actually needs, and folds them into the same fair, explainable split from the first commit.
Browse the marketplace →Get the platform
Tokenize the equity split — on-chain, fail-closed.
Want to go beyond decision-support? The Tokenized Partnerships suite wraps Fifty50's fair-split engine in Sentinel's on-chain settlement layer — your equity split becomes a real, auditable on-chain asset. One-time license, self-hosted.