Skip to content
@typelevel

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

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 633

  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 2.3k 585

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 338 60

Repositories

Showing 10 of 117 repositories
  • 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 7, 2026
  • foundation Public

    governance for the Typelevel Foundation

    typelevel/foundation's past year of commit activity
    0 1 3 0 Updated Nov 6, 2026
  • fs2 Public

    Compositional, streaming I/O library for Scala

    typelevel/fs2's past year of commit activity
    Scala 2,456 633 106 (7 issues need help) 44 Updated Nov 6, 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 458 Apache-2.0 60 13 24 Updated Nov 6, 2026
  • vulcan Public

    Functional Avro for Scala

    typelevel/vulcan's past year of commit activity
    Scala 107 Apache-2.0 38 1 0 Updated Nov 6, 2026
  • natchez Public

    functional tracing for cats

    typelevel/natchez's past year of commit activity
    Scala 341 MIT 76 16 19 Updated Nov 6, 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) 27 Updated Nov 6, 2026
  • otel4s-sdk Public

    Implementation of the otel4s SDK modules in Scala from scratch

    typelevel/otel4s-sdk's past year of commit activity
    Scala 7 Apache-2.0 3 6 (1 issue needs help) 6 Updated Nov 6, 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 Nov 6, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie's past year of commit activity
    Scala 2,226 MIT 377 126 9 Updated Nov 6, 2026