Skip to content
@typelevel

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

Pinned Loading

  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 579

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 337 60

Repositories

Showing 10 of 115 repositories
  • 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 29, 2026
  • natchez-http4s Public

    Glorious integration layer for Natchez and Http4s.

    typelevel/natchez-http4s's past year of commit activity
    Scala 50 MIT 18 4 12 Updated Sep 29, 2026
  • typelevel.github.com Public

    typelevel.org website

    typelevel/typelevel.github.com's past year of commit activity
    HTML 42 113 23 12 Updated Sep 29, 2026
  • typelevel-scalafix Public

    Scalafix rules for Typelevel projects

    typelevel/typelevel-scalafix's past year of commit activity
    Scala 27 Apache-2.0 8 18 (1 issue needs help) 13 Updated Sep 29, 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 Sep 29, 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) 3 Updated Sep 29, 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 454 Apache-2.0 57 13 23 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 9 Updated Sep 29, 2026
  • feral Public

    Feral cats are homeless, feral functions are serverless

    typelevel/feral's past year of commit activity
    Scala 195 Apache-2.0 52 31 (4 issues need help) 47 Updated Sep 29, 2026
  • cats-effect Public

    The pure asynchronous runtime for Scala

    typelevel/cats-effect's past year of commit activity
    Scala 2,240 Apache-2.0 579 198 (7 issues need help) 34 Updated Sep 28, 2026
View all repositories

Sponsors

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