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Typelevel

We do functional programming together!

Welcome to Typelevel!

We are an ecosystem of Scala-based projects and a community of people united to foster an inclusive, welcoming, and safe environment around functional programming. We work together to develop projects that apply functional programming to challenging problems relevant in industry. Our community culture embraces curiosity and mentoring and we don't shy away from experimenting with new and exciting ideas. Most of all, we love to make programming joyful and social.

Get involved!

🐣 Learn 🌱 Start Contributing 🧑‍🏫 Virtual Meetups 🤝 Code of Conduct

Find us on...

🌐 typelevel.org 💬 Discord 🦋 Bluesky 🐘 Mastodon 📺 YouTube 🌟 Luma 👔 LinkedIn 🩷 GitHub Sponsors

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  1. cats cats Public

    Lightweight, modular, and extensible library for functional programming.

    Scala 5.5k 1.2k

  2. fs2 fs2 Public

    Compositional, streaming I/O library for Scala

    Scala 2.5k 633

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 392

  4. spire spire Public

    Powerful new number types and numeric abstractions for Scala.

    Scala 1.8k 239

  5. cats-effect cats-effect Public

    The pure asynchronous runtime for Scala

    Scala 2.2k 582

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 338 60

Repositories

Showing 10 of 115 repositories
  • typelevel.github.com Public

    typelevel.org website

    typelevel/typelevel.github.com's past year of commit activity
    HTML 42 113 23 12 Updated Oct 21, 2026
  • cats-tagless Public

    Library of utilities for tagless final encoded algebras

    typelevel/cats-tagless's past year of commit activity
    Scala 320 Apache-2.0 42 9 (4 issues need help) 5 Updated Oct 21, 2026
  • foundation Public

    governance for the Typelevel Foundation

    typelevel/foundation's past year of commit activity
    0 1 3 0 Updated Oct 21, 2026
  • simulacrum-scalafix Public

    Simulacrum as Scalafix rules

    typelevel/simulacrum-scalafix's past year of commit activity
    Scala 36 10 6 8 Updated Oct 20, 2026
  • grackle Public

    Grackle: Functional GraphQL for the Typelevel stack

    typelevel/grackle's past year of commit activity
    Scala 189 Apache-2.0 33 22 6 Updated Oct 20, 2026
  • fs2 Public

    Compositional, streaming I/O library for Scala

    typelevel/fs2's past year of commit activity
    Scala 2,454 633 105 (7 issues need help) 44 Updated Oct 20, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie's past year of commit activity
    Scala 2,225 MIT 377 126 6 Updated Oct 20, 2026
  • typelevel-nix Public

    Development tools for Typelevel projects

    typelevel/typelevel-nix's past year of commit activity
    Nix 134 Apache-2.0 12 5 5 Updated Oct 20, 2026
  • Laika Public

    Site and E-book Generator and Customizable Text Markup Transformer for sbt, Scala and Scala.js

    typelevel/Laika's past year of commit activity
    Scala 457 Apache-2.0 58 13 24 Updated Oct 20, 2026
  • vulcan Public

    Functional Avro for Scala

    typelevel/vulcan's past year of commit activity
    Scala 104 Apache-2.0 38 2 0 Updated Oct 20, 2026