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Typelevel

We do functional programming together!
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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 626

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 397

  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 569

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 334 58

Repositories

Showing 10 of 111 repositories
  • cats Public

    Lightweight, modular, and extensible library for functional programming.

    typelevel/cats’s past year of commit activity
    Scala 5,423 1,238 222 (7 issues need help) 43 Updated Feb 28, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie’s past year of commit activity
    Scala 2,214 MIT 374 126 5 Updated Feb 28, 2026
  • scalacheck-xml Public

    Scalacheck instances for scala-xml

    typelevel/scalacheck-xml’s past year of commit activity
    Scala 5 1 0 1 Updated Feb 28, 2026
  • otel4s Public

    An OpenTelemetry library for Scala based on Cats-Effect

    typelevel/otel4s’s past year of commit activity
    Scala 205 Apache-2.0 47 12 (2 issues need help) 5 Updated Feb 28, 2026
  • case-insensitive Public

    A case-insensitive string for Scala

    typelevel/case-insensitive’s past year of commit activity
    Scala 38 Apache-2.0 15 5 3 Updated Feb 28, 2026
  • fs2 Public

    Compositional, streaming I/O library for Scala

    typelevel/fs2’s past year of commit activity
    Scala 2,440 626 101 (7 issues need help) 37 Updated Feb 28, 2026
  • scalac-options Public

    A library for configuring scalac options

    typelevel/scalac-options’s past year of commit activity
    Scala 47 Apache-2.0 15 6 5 Updated Feb 28, 2026
  • kind-projector Public

    Compiler plugin for making type lambdas (type projections) easier to write

    typelevel/kind-projector’s past year of commit activity
    Scala 926 MIT 75 10 (4 issues need help) 1 Updated Feb 28, 2026
  • cats-effect Public

    The pure asynchronous runtime for Scala

    typelevel/cats-effect’s past year of commit activity
    Scala 2,217 Apache-2.0 569 197 (7 issues need help) 44 Updated Feb 28, 2026
  • gsoc-onboarding Public
    typelevel/gsoc-onboarding’s past year of commit activity
    Scala 0 13 0 3 Updated Feb 28, 2026
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Sponsors

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  • @andrew-selvia
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