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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

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🌐 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 2.3k 585

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 338 61

Repositories

Showing 10 of 117 repositories
  • fs2 Public

    Compositional, streaming I/O library for Scala

    typelevel/fs2's past year of commit activity
    Scala 2,456 633 104 (7 issues need help) 40 Updated Nov 12, 2026
  • grackle Public

    Grackle: Functional GraphQL for the Typelevel stack

    typelevel/grackle's past year of commit activity
    Scala 189 Apache-2.0 33 23 5 Updated Nov 12, 2026
  • toolkit Public

    Quickstart your next app with the Typelevel Toolkit!

    typelevel/toolkit's past year of commit activity
    Scala 102 Apache-2.0 9 8 (1 issue needs help) 15 Updated Nov 12, 2026
  • fs2-kafka-vulcan Public

    Functional Avro on Kafka for Scala

    typelevel/fs2-kafka-vulcan's past year of commit activity
    Scala 0 Apache-2.0 0 0 0 Updated Nov 12, 2026
  • scalacheck Public

    Property-based testing for Scala

    typelevel/scalacheck's past year of commit activity
    Scala 1,963 BSD-3-Clause 392 55 (1 issue needs help) 18 Updated Nov 12, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie's past year of commit activity
    Scala 2,226 MIT 376 125 9 Updated Nov 11, 2026
  • otel4s Public

    An OpenTelemetry library for Scala based on Cats-Effect

    typelevel/otel4s's past year of commit activity
    Scala 216 Apache-2.0 50 8 (3 issues need help) 1 Updated Nov 11, 2026
  • fs2-grpc Public

    gRPC implementation for FS2/cats-effect

    typelevel/fs2-grpc's past year of commit activity
    Scala 286 MIT 66 9 6 Updated Nov 11, 2026
  • jawn Public

    Jawn is for parsing jay-sawn (JSON)

    typelevel/jawn's past year of commit activity
    Scala 436 73 12 6 Updated Nov 11, 2026
  • typelevel.github.com Public

    typelevel.org website

    typelevel/typelevel.github.com's past year of commit activity
    HTML 42 112 20 10 Updated Nov 10, 2026