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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 5.4k 1.2k

  2. fs2 fs2 Public

    Compositional, streaming I/O library for Scala

    Scala 2.4k 630

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 396

  4. spire spire Public

    Powerful new number types and numeric abstractions for Scala.

    Scala 1.8k 238

  5. cats-effect cats-effect Public

    The pure asynchronous runtime for Scala

    Scala 2.2k 574

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 336 60

Repositories

Showing 10 of 115 repositories
  • jawn Public

    Jawn is for parsing jay-sawn (JSON)

    typelevel/jawn’s past year of commit activity
    Scala 436 73 12 4 Updated Jun 17, 2026
  • typelevel.github.com Public

    typelevel.org website

    typelevel/typelevel.github.com’s past year of commit activity
    Scala 41 114 24 7 Updated Jun 16, 2026
  • fs2-grpc Public

    gRPC implementation for FS2/cats-effect

    typelevel/fs2-grpc’s past year of commit activity
    Scala 282 MIT 65 8 6 Updated Jun 16, 2026
  • grackle Public

    Grackle: Functional GraphQL for the Typelevel stack

    typelevel/grackle’s past year of commit activity
    Scala 187 Apache-2.0 31 23 (1 issue needs help) 7 Updated Jun 16, 2026
  • natchez Public

    functional tracing for cats

    typelevel/natchez’s past year of commit activity
    Scala 340 MIT 79 16 13 Updated Jun 16, 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 Jun 16, 2026
  • fs2-kafka Public

    Functional Kafka Streams for Scala

    typelevel/fs2-kafka’s past year of commit activity
    Scala 311 Apache-2.0 108 0 3 Updated Jun 16, 2026
  • vulcan Public

    Functional Avro for Scala

    typelevel/vulcan’s past year of commit activity
    Scala 104 Apache-2.0 36 1 3 Updated Jun 16, 2026
  • skunk Public

    A data access library for Scala + Postgres.

    typelevel/skunk’s past year of commit activity
    Scala 1,658 MIT 174 79 (2 issues need help) 19 Updated Jun 16, 2026
  • sbt-tpolecat Public

    scalac options for the enlightened

    typelevel/sbt-tpolecat’s past year of commit activity
    Scala 408 Apache-2.0 57 12 (2 issues need help) 5 Updated Jun 16, 2026

Sponsors

  • @github
  • @antoniojimeneznieto
  • @vladimir-popov
  • @rtyley
  • @yoshinorin
  • @a-nigredo
  • @DavidGregory084
  • @lhns
  • @BalmungSan
  • @b-vennes
  • @lorandszakacs
  • Private Sponsor

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