We secure smart contracts with
formal verification.

Secure your critical code with formal verification, the highest security standard in software

Trusted by

Audits give opinions. We give guarantees.

✓

Your contracts are proven correct across every possible input, not just the ones someone thought to test.

✓

We either find bugs or formally verify your contract is correct. If we can't do either, you get your money back.

✓

3 months of re-verification on every code change, included. Auditors move on after they invoice.

We model your code’s behavior in Lean. The model can target different levels of the compilation pipeline based on your needs.

We define the properties your contract must always satisfy, such as solvency, access control, and accounting invariants.

We write a mathematical proof in Lean that the implementation satisfies the specification. You can independently verify it with one CLI command.

↻

Ship a contract change and we re-verify equivalence at no extra cost. Extendable to 12 months for longer coverage.

✔

If we can't prove you have a bug nor formally verify you don't, we refund. We stake our reputation on every job.

We take 4 protocols per quarter. Formal verification demands deep focus. We'd rather verify fewer contracts well than many poorly.