Alternatives to Flow

10 alternatives

  1. 1Source Code Analysis, Developer Experience Platforms

    Mypy

    Source Code Analysis

    Python static type checker combining gradual typing with Python-native syntax using PEP 484 type hints.

    Free planDeveloper Experience PlatformsCode Quality
  2. 2Source Code Analysis, Developer Experience Platforms

    Pyre

    Source Code Analysis

    Meta's performant type checker for Python with Pysa security analysis and incremental checking.

    Free planStatic Application Security TestingDeveloper Experience Platforms
  3. 3Source Code Analysis

    ShellCheck

    Source Code Analysis

    Static analysis tool for shell scripts that finds bugs and suggests improvements for bash and sh code.

    Free planFree trialCode Quality and Linting
  4. 4Source Code Analysis

    PHPStan

    Source Code Analysis

    PHP static analysis tool finding bugs in code without running it with progressive levels of strictness.

    Free planFree trialCode QualityTechnical Debt Management
  5. 5Source Code Analysis

    Metabob

    Source Code Analysis

    AI-powered static code analysis platform detecting complex programming bugs humans miss.

    Free planFree trialTiered plansAI Code ReviewCode Quality and Linting
  6. 6Source Code Analysis

    PMD

    Source Code Analysis

    Open source static analysis tool finding common programming flaws in Java, JavaScript, Apex, and other languages.

    Multi language static code analysis
  7. 7Source Code Analysis

    Psalm

    Code Quality

    Open source static analysis tool for PHP finding type-related bugs and improving code quality in large codebases.

    Free planStatic Application Security TestingSource Code Analysis
  8. 8Source Code Analysis, Developer Experience Platforms

    TypeScript ESLint

    Code Quality and Linting

    Official TypeScript integration for ESLint providing type-aware linting rules and parsers.

    Free planDeveloper Experience PlatformsSource Code Analysis
  9. 9Source Code Analysis

    Understand

    Source Code Analysis

    SciTools' static code analysis platform for C, C++, C#, Java, and others with metrics and visualizations.

    Architecture visualization and dependency analysisAI guided codebase onboardingMcp agent integration

    Price$82.92 / month

  10. 10Source Code Analysis

    SWC

    Source Code Analysis

    Super-fast TypeScript and JavaScript compiler written in Rust used by Next.js and Parcel.

    Free planCode Quality and LintingDeveloper Tools