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    facebook/flow

    #507 this week

    Adds static typing to JavaScript to improve developer productivity and code quality.

    backend
    Rust
    MIT
    22.3K stars
    1.9K forks
    22.3K GitHub watchers
    Updated Oct 15, 2026
    View on GitHub

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    Where it stands

    Rank, growth pace and release cadence relative to everything GStars tracks.

    Ranks #507 of 2,845 repositories GStars tracks this week (top 18%).

    5 releases in the last 90 days, the latest 5 days ago, with 324 contributors on GitHub.

    Use Cases & Benefits

    • Adds static typing to JavaScript to improve developer productivity and code quality.
    • Provides early error detection and type safety in JavaScript without requiring a full migration to TypeScript.
    • Use for enhancing code reliability in large JavaScript codebases by catching type errors during development.
    • Use for integrating static type checking into existing JavaScript projects to improve maintainability.
    • Use for building developer tools that require parsing and analyzing Flow-typed JavaScript syntax trees.

    Should you depend on it?

    License terms, project hygiene and risks, from GitHub metadata and GStars' snapshots.

    License

    MIT

    Permissive: commercial use, modification and redistribution are allowed with attribution.

    Community files

    • README: present
    • Contributing guide: present
    • Code of conduct: present

    Watch-outs

    No watch-outs from GStars' checks.

    General guidance from repository metadata, not legal advice. How we score

    From the README

    Flow is a static typechecker for JavaScript. To find out more about Flow, check out flow.org.

    There are binary distributions for each of these platforms and you can also build it from source on any of them as well.

    Excerpt from the facebook/flow README on GitHub (MIT license). © its authors.Read the full README on GitHub

    Daily snapshots

    Stars gained per day, and how forks and open issues moved, from GStars' daily snapshots

    Forks

    1.9K-3

    Open issues

    513-32

    Compared with peers in Backend

    Fastest-growing repositories GStars tracks in this cohort for the week of Oct 11, by 7-day star growth

    View category →
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