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Typelevel

We do functional programming together!
README.md

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

Find us on...

🌐 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 636

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 393

  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 574

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 337 61

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 1 Updated Sep 11, 2026
  • fs2-kafka Public

    Functional Kafka Streams for Scala

    typelevel/fs2-kafka's past year of commit activity
    Scala 314 Apache-2.0 111 1 9 Updated Sep 11, 2026
  • grackle Public

    Grackle: Functional GraphQL for the Typelevel stack

    typelevel/grackle's past year of commit activity
    Scala 189 Apache-2.0 32 22 4 Updated Sep 11, 2026
  • idna4s Public

    Cross-platform Scala implementation of Internationalized Domain Names in Applications

    typelevel/idna4s's past year of commit activity
    Scala 8 MIT 4 5 14 Updated Sep 11, 2026
  • otel4s-sdk Public

    Implementation of the otel4s SDK modules in Scala from scratch

    typelevel/otel4s-sdk's past year of commit activity
    Scala 6 Apache-2.0 3 6 (1 issue needs help) 2 Updated Sep 10, 2026
  • Laika Public

    Site and E-book Generator and Customizable Text Markup Transformer for sbt, Scala and Scala.js

    typelevel/Laika's past year of commit activity
    Scala 455 Apache-2.0 57 12 23 Updated Sep 10, 2026
  • natchez Public

    functional tracing for cats

    typelevel/natchez's past year of commit activity
    Scala 340 MIT 76 16 18 Updated Sep 9, 2026
  • otel4s Public

    An OpenTelemetry library for Scala based on Cats-Effect

    typelevel/otel4s's past year of commit activity
    Scala 215 Apache-2.0 49 7 (2 issues need help) 1 Updated Sep 9, 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 11 Updated Sep 9, 2026
  • fs2-netty Public

    What it says on the tin!

    typelevel/fs2-netty's past year of commit activity
    Scala 47 Apache-2.0 13 3 23 Updated Sep 9, 2026
View all repositories

Sponsors

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

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