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Typelevel

We do functional programming together!
README.md

Typelevel is an ecosystem of projects and a community of people united to foster an inclusive, welcoming, and safe environment around functional programming in Scala. Also find us on...

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  1. cats cats Public

    Lightweight, modular, and extensible library for functional programming.

    Scala 5.4k 1.2k

  2. fs2 fs2 Public

    Compositional, streaming I/O library for Scala

    Scala 2.4k 622

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 399

  4. spire spire Public

    Powerful new number types and numeric abstractions for Scala.

    Scala 1.8k 240

  5. cats-effect cats-effect Public

    The pure asynchronous runtime for Scala

    Scala 2.2k 566

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 334 58

Repositories

Showing 10 of 110 repositories
  • mouse Public

    A small companion to cats

    typelevel/mouse’s past year of commit activity
    Scala 376 MIT 66 4 3 Updated Feb 7, 2026
  • natchez Public

    functional tracing for cats

    typelevel/natchez’s past year of commit activity
    Scala 339 MIT 78 16 12 Updated Feb 6, 2026
  • otel4s-sdk Public

    Implementation of the otel4s SDK modules in Scala from scratch

    typelevel/otel4s-sdk’s past year of commit activity
    Scala 5 Apache-2.0 1 5 5 Updated Feb 6, 2026
  • otel4s Public

    An OpenTelemetry library for Scala based on Cats-Effect

    typelevel/otel4s’s past year of commit activity
    Scala 204 Apache-2.0 45 14 (2 issues need help) 6 Updated Feb 6, 2026
  • log4cats-natchez Public

    log4cats backend that provides a Logger[F] given a Trace[F] from Natchez

    typelevel/log4cats-natchez’s past year of commit activity
    Scala 1 Apache-2.0 2 0 8 Updated Feb 6, 2026
  • grackle Public

    Grackle: Functional GraphQL for the Typelevel stack

    typelevel/grackle’s past year of commit activity
    Scala 184 Apache-2.0 31 23 (1 issue needs help) 5 Updated Feb 6, 2026
  • munit-cats-effect Public

    Integration library for MUnit & cats-effect

    typelevel/munit-cats-effect’s past year of commit activity
    Scala 154 Apache-2.0 38 5 2 Updated Feb 6, 2026
  • toolkit Public

    Quickstart your next app with the Typelevel Toolkit!

    typelevel/toolkit’s past year of commit activity
    Scala 97 Apache-2.0 9 8 (1 issue needs help) 13 Updated Feb 6, 2026
  • typelevel.github.com Public

    Web site of typelevel.scala

    typelevel/typelevel.github.com’s past year of commit activity
    HTML 40 105 29 4 Updated Feb 5, 2026
  • fs2-netty Public

    What it says on the tin!

    typelevel/fs2-netty’s past year of commit activity
    Scala 47 Apache-2.0 13 3 23 Updated Feb 5, 2026
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Sponsors

  • @yoshinorin
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  • @DavidGregory084
  • @lhns
  • @BalmungSan
  • @b-vennes
  • @lorandszakacs
  • @andrew-selvia
  • Private Sponsor