Make your cheap LLM
find real bugs.

Give any model a verifier. It returns a bug you can replay — or proves it can’t happen. Runs offline, on your machine.

Get the license — $120/yr See the proof
96% of bugs caught  vs 54% for the model alone — on 440 real CVEs with gpt-oss-120b.
440 real CVEs 11 languages runs offline bring your own model

The model proposes, the kernel proves

Model alone

Reads it, guesses

→ vulnerable: true / false (unverified)
+ RedMirror

Reads it, then proves it

→ vulnerable: true · witness confirmed ✓

The proof

96% / 54%
Real bugs caught, verified vs the model’s own word
1.8×
more found than the same model alone
16
real bugs it caught that the benchmark marked safe
Model alone Model + RedMirror
0 50 100 54% MODEL ALONE 96% + REDMIRROR
OpenSSF benchmark — 440 real CVEs, each paired with its fix. Same cheap model, with and without RedMirror.

Pricing

$120 / year · per user
Get the license

Pay by card or PayPal · 7-day money-back guarantee

Questions

Does my code leave my machine?

No. RedMirror is one offline binary; it reads your source locally and calls whatever model you point it at, including a local one.

Which model do I need?

Any — the benchmark runs on gpt-oss-120b, a cheap open model. The kernel does the exhaustive checking with no tokens, so you only pay for the model’s reading.

Is it a linter?

No. It searches every reachable state of the code and returns a concrete counterexample — the steps that reach the bug — or a bounded proof none exists.

What if it’s not for me?

Full refund within 7 days of purchase — just ask.