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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.

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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
  • catapult Public
    typelevel/catapult's past year of commit activity
    Scala 16 Apache-2.0 5 5 (2 issues need help) 2 Updated Oct 8, 2026
  • skunk Public

    A data access library for Scala + Postgres.

    typelevel/skunk's past year of commit activity
    Scala 1,666 MIT 175 75 (2 issues need help) 19 Updated Oct 8, 2026
  • sbt-tpolecat Public

    scalac options for the enlightened

    typelevel/sbt-tpolecat's past year of commit activity
    Scala 410 Apache-2.0 57 12 (2 issues need help) 8 Updated Oct 8, 2026
  • natchez-http4s Public

    Glorious integration layer for Natchez and Http4s.

    typelevel/natchez-http4s's past year of commit activity
    Scala 50 MIT 18 4 12 Updated Oct 8, 2026
  • natchez Public

    functional tracing for cats

    typelevel/natchez's past year of commit activity
    Scala 340 MIT 76 16 17 Updated Oct 8, 2026
  • grackle Public

    Grackle: Functional GraphQL for the Typelevel stack

    typelevel/grackle's past year of commit activity
    Scala 189 Apache-2.0 32 23 7 Updated Oct 8, 2026
  • fs2-grpc Public

    gRPC implementation for FS2/cats-effect

    typelevel/fs2-grpc's past year of commit activity
    Scala 284 MIT 66 9 6 Updated Oct 8, 2026
  • frameless Public

    Expressive types for Spark.

    typelevel/frameless's past year of commit activity
    Scala 895 Apache-2.0 135 37 (6 issues need help) 11 Updated Oct 8, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie's past year of commit activity
    Scala 2,224 MIT 377 127 15 Updated Oct 8, 2026
  • cats-time Public

    Cats Instances for Java Time

    typelevel/cats-time's past year of commit activity
    Scala 94 MIT 19 1 4 Updated Oct 8, 2026