Level up your test suite.
MutantZero is built around one idea: mutation testing should feel like a product — fast, smart, and focused.
MutantZero treats your code like a world with rules — not a pile of syntax. It classifies function intent and predicts mutant survival to cut wasted compute.
Archetype Classification
6 typesEvery function gets classified. High-value archetypes get more mutations, DTOs get skipped.
Predictive Mutation Testing
PMTA second AI layer predicts which mutants will survive — and skips them entirely.
Choose speed, isolation, and repeatability — without changing how you think about runs.
150+ mutation rules across 14 categories — language-aware operators for JS/TS.
Arithmetic & Math
42+ → −, × → ÷++ → −−, sign flip+= → −=, compound& → |, shiftsLogic & Control
40> → >=, === → !==&& → ||, !x → xtrue → false, flipstatement removalData & Types
52.trim() → .trimStart().push() → .pop()property, spread?? → ||, ?. chainsAdvanced
18quantifiers, patternscall replacementJSX mutations, async/await handling, optional chaining (?.), nullish coalescing (??), and TypeScript-aware type guards.
Multi-language support powered by tree-sitter for fast, resilient AST parsing.
Python, Go, Rust, Kotlin — coming after the core lanes are fully mastered.
Don't just get a score — get a map: hotspots, coverage context, and git-aware focus.
A modern React desktop experience that makes surviving mutants easy to understand, not just easy to generate.