For fintech startups
Built for fintech startups.
Fintech is the domain where a bug is a financial error. Holdfast builds the money-handling features deterministically, with an audit trail that holds up in diligence.
No AI anywhere near the money math
We are an AI-augmented studio, and we are explicit about where AI is not allowed. Reconciliation, billing totals, and balance math are written by a human, deterministically, and tested hard. A model can draft the surrounding code. It does not compute a number that becomes a transaction.
Auditable by construction
Money flows are append-only. A ledger is never edited in place, so you can always answer "why is this balance what it is" by reading rows in order. That property is what makes diligence and audits straightforward instead of frightening.
Relevant work
Sprints worth reading.
FAQ
fintech startups, common questions.
No. Money math is deterministic, human-written, and tested hard. AI may draft surrounding code but never computes a charge or a balance.
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