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Unfix vs Rystic

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 Rystic
DetailUnfix logo UnfixRystic logo Rystic
What it doesIndependent verification for bug fixes in C, C++ and firmware Realistic API simulators for training and testing
StageMVP Not given
FoundedNot given Not given
Based inNot given US
Pricing modelNot given Freemium
PricingNot given Free: $0 with GitHub, Linear and Slack simulators, 10 free hours per month. Pro: $89.99 per seat per month with full catalog, $100 usage credit per seat, $0.012 per simulator-minute after credit. Enterprise: custom pricing.
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
  • Slack simulator
  • GitHub simulator
  • Stripe simulator
  • Kalshi simulator
  • Verified against live APIs
  • Latency and fault injection
  • Settable state
  • Local and CI execution
  • Verified UIs
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
  • Validated against real APIs daily with published accuracy percentages
  • Stateful simulators that maintain state across calls
  • Local execution with no rate limits
  • Supports 20+ API integrations including Stripe, GitHub and Slack
Community votes00
DR (Domain Rating by Ahrefs)5 +1 (up) since last check2 no change since last check
Trust Flow (Majestic)013
Citation Flow (Majestic)030
Referring domains (Majestic)041

3 details filled in for both companies.

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