Secure your critical code
with AI-native formal audits
We use massive inference compute to challenge your code’s specification and prove your code meets it.
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Audits give opinions We give guarantees
Mathematical certainty
Your contracts are proven correct across every possible input, not just the ones someone thought to test.
Skin in the game
We either find bugs or formally verify your contract is correct. If we can't do either, you get your money back.
We stay with you
3 months of re-verification on every code change, included. Auditors move on after they invoice.
Our latest formal audits
EIP-8282
Machine-checked guarantees for the builder deposit and builder exit predeploys.
Read the audit →
ParetoPareto redemption backing
A Lean proof that the modeled deposit keeps Pareto USP’s reserve guard satisfied.
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UnlinkPrivate onchain payments
A formal audit, then a proof of what the payment system guarantees.
Read the audit →How formal verification works
Modeling
We model your code’s behavior in Lean. The model can target different levels of the compilation pipeline based on your needs.
Specification
We define the properties your contract must always satisfy, such as solvency, access control, and accounting invariants.
Verification
We write a mathematical proof in Lean that the implementation satisfies the specification. You can independently verify it with one CLI command.
3 months of maintenance
Ship a contract change and we re-verify equivalence at no extra cost. Extendable to 12 months for longer coverage.
Full refund guarantee
If we can't prove you have a bug nor formally verify you don't, we refund. We stake our reputation on every job.
Frequently asked questions
Contact our team
We take 4 protocols per quarter. Formal verification demands deep focus. We'd rather verify fewer contracts well than many poorly.