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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 2.2k 582

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 338 60

Repositories

Showing 10 of 115 repositories
  • vulcan Public

    Functional Avro for Scala

    typelevel/vulcan's past year of commit activity
    Scala 104 Apache-2.0 38 2 0 Updated Oct 18, 2026
  • jawn Public

    Jawn is for parsing jay-sawn (JSON)

    typelevel/jawn's past year of commit activity
    Scala 436 72 12 6 Updated Oct 18, 2026
  • weaver-test Public

    A test framework that runs everything in parallel.

    typelevel/weaver-test's past year of commit activity
    Scala 87 15 25 17 Updated Oct 17, 2026
  • fs2-kafka Public

    Functional Kafka Streams for Scala

    typelevel/fs2-kafka's past year of commit activity
    Scala 316 Apache-2.0 112 1 0 Updated Oct 17, 2026
  • vault Public

    Type-safe, persistent storage for values of arbitrary types

    typelevel/vault's past year of commit activity
    Scala 84 MIT 20 1 4 Updated Oct 17, 2026
  • typelevel.g8 Public

    A typelevel.g8 based on sbt-typelevel

    typelevel/typelevel.g8's past year of commit activity
    Scala 14 6 8 5 Updated Oct 17, 2026
  • twiddles Public

    Micro-library for building effectful protocols

    typelevel/twiddles's past year of commit activity
    Scala 70 BSD-3-Clause 3 0 9 Updated Oct 17, 2026
  • toolkit Public

    Quickstart your next app with the Typelevel Toolkit!

    typelevel/toolkit's past year of commit activity
    Scala 102 Apache-2.0 8 8 (1 issue needs help) 14 Updated Oct 17, 2026
  • skunk Public

    A data access library for Scala + Postgres.

    Scala 1,665 MIT 174 75 (2 issues need help) 22 Updated Oct 17, 2026
  • scalacheck-xml Public

    Scalacheck instances for scala-xml

    typelevel/scalacheck-xml's past year of commit activity
    Scala 5 1 0 5 Updated Oct 17, 2026