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Unfix vs Rulebook

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Unfix compared with Rulebook
DetailUnfix logo UnfixRulebook logo Rulebook
What it doesIndependent verification for bug fixes in C, C++ and firmware Take your AI support bot from 4/10 to 10/10
StageMVP MVP
FoundedNot given 2026
Based inNot given Not given
Pricing modelNot given Free trial
PricingNot given Free during beta. After beta: $29/month (your own AI keys, unlimited runs) or $59/month (AI included, 50 runs/month).
Key features
  • Reproduces bugs deterministically on base version before applying fix
  • Verifies fix removal confirms bug returns
  • Scans diffs for masking patterns like disabled sanitizers and weakened tests
  • Runs on real hardware via STM32 NUCLEO boards and ST-Link
  • Integrates with AI coding agents as MCP tool
  • Posts verdicts as GitHub pull request comments
  • Provides per-test verdicts: FIXED, BROKEN, FLAKY ON THE BENCH, FLAKY WORSE
  • Runs entirely on your machines with no cloud dependency
  • Generates reports for change records and regulatory compliance
  • Runs builds and tests in Linux container on your machine
  • Bot Score: rates bot performance across five dimensions (rules, facts, solutions, tone, trick resistance)
  • Break my bot: 15 adversarial customer scenarios test for vulnerabilities
  • Fix it for me: automatically rewrites rule sheet and tests against saved situations
  • Train my bot: 30-minute automated training on weak spots with test validation
  • GitHub integration: sends improvements as pull requests for engineer approval
  • Real chat analysis: identifies problems in actual customer conversations with privacy masking
  • Knowledge check: validates bot replies against FAQ and policy documents
  • AI comparison: test bot performance across Claude, ChatGPT, and Gemini with costs and speed
  • Open source engine: public GitHub implementation of scoring and testing algorithms
What makes it different
  • Only verification tool that reverses the fix to prove tests actually catch the bug
  • Deterministic verdict with no AI language model in decision logic
  • Tests on real hardware boards, not just laptops
  • Detects masking techniques that hide bugs while passing tests
  • Validated public benchmark showing 4 VERIFIED and 6 REJECTED on real open-source bugs
  • Nothing ships without engineer approval: all changes go through GitHub pull request review
  • Privacy by default: customer data anonymized, keys encrypted, uploads not stored
  • Open source testing engine: full algorithm transparency available on GitHub
  • Works with your existing AI: supports Claude, ChatGPT, and Gemini with user's own keys
  • Unified team experience: one plan covers support, product, and engineering roles
Community votes00
DR (Domain Rating by Ahrefs)4 −1 (down) since last checkNot checked yet no change since last check
Trust Flow (Majestic)00
Citation Flow (Majestic)00
Referring domains (Majestic)00

4 details filled in for both companies.

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