Level up your
test suite
Mutation testing that feels like a product — fast, smart, and focused. Explore what makes MutantZero different.
AI Intelligence
Your code has a soul. We read it.
MutantZero classifies every function by intent — Algorithm, IO Bound, Transformer, State Mutator, Guard, or DTO. Then our predictive engine forecasts which mutants will survive before they even run.
Performance
Parallel universes. Real speed.
Choose your execution mode: Sequential for debugging or Parallel for speed. Add Docker sandboxing for complete isolation. Intelligent caching remembers what you've already proven.
Mutation Operators
90+ ways to break your code.
Arithmetic, logical, string, regex, async/await, optional chaining, nullish coalescing, JSX — every mutation operator designed for JavaScript and TypeScript's unique patterns.
Languages
Tree-sitter roots. Multi-lang future.
Built on tree-sitter for blazing-fast, incremental AST parsing. JavaScript and TypeScript today. Python, Go, Rust, and Kotlin on the roadmap.
Analysis & Reporting
Maps, not just scores.
Hotspot analysis with complexity metrics, git churn tracking, and risk scoring. Coverage integration shows which lines matter. Git-aware filtering for PR-focused validation.
Desktop App
Mutation testing that feels like a product.
Lab for running tests, Quarantine for reviewing survivors, Archaeologist for code exploration, Oracle for AI insights. Real-time progress, socket-based updates, and beautiful visualizations.
Start hunting mutants today
Download the app, connect your project, and see your first mutation score in minutes. Free tier included.