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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

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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 634

  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 578

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 337 60

Repositories

Showing 10 of 115 repositories
  • cats-effect Public

    The pure asynchronous runtime for Scala

    typelevel/cats-effect's past year of commit activity
    Scala 2,238 Apache-2.0 578 198 (7 issues need help) 34 Updated Sep 29, 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 8 Updated Sep 28, 2026
  • kind-projector Public

    Compiler plugin for making type lambdas (type projections) easier to write

    typelevel/kind-projector's past year of commit activity
    Scala 923 MIT 75 10 (4 issues need help) 0 Updated Sep 28, 2026
  • case-insensitive Public

    A case-insensitive string for Scala

    typelevel/case-insensitive's past year of commit activity
    Scala 38 Apache-2.0 15 5 5 Updated Sep 28, 2026
  • scalacheck-xml Public

    Scalacheck instances for scala-xml

    typelevel/scalacheck-xml's past year of commit activity
    Scala 5 1 0 5 Updated Sep 28, 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) 2 Updated Sep 28, 2026
  • scalac-options Public

    A library for configuring scalac options

    typelevel/scalac-options's past year of commit activity
    Scala 48 Apache-2.0 17 6 7 Updated Sep 28, 2026
  • fs2 Public

    Compositional, streaming I/O library for Scala

    typelevel/fs2's past year of commit activity
    Scala 2,454 634 103 (7 issues need help) 38 Updated Sep 28, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie's past year of commit activity
    Scala 2,225 MIT 379 127 13 Updated Sep 26, 2026
  • skunk Public

    A data access library for Scala + Postgres.

    typelevel/skunk's past year of commit activity
    Scala 1,667 MIT 175 75 (2 issues need help) 16 Updated Sep 25, 2026
View all repositories

Sponsors

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  • @rtyley
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  • @a-nigredo
  • @DavidGregory084
  • @lhns
  • @BalmungSan
  • @lorandszakacs
  • Private Sponsor