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@slackhq

Slack

On a mission to make your working life simpler, more pleasant and more productive.

Slack open source logo

 

At Slack, like most tech companies, we depend on open source software from all over the world to help us get things done. We're grateful to the open source community, the projects, and especially their maintainers who have allowed us to innovate and make our customers working lives a little bit more enjoyable.

Listed within this GitHub org, you'll find a collection of things built by Slack, which we think folks may find helpful or inspiring. Our published projects cover a wide range of complexity, from Nebula, a scalable overlay networking tool, and PanModal, a customizable presentation API for constructing modals on iOS, Kaldb, for storing observability data, to a variety of tutorials and snippets to complement our engineering blog posts.

 

In addition to publishing open source projects, Slack strives to actively participate in improving upon the core frameworks and technologies Slack is built upon, such as Electron, Webpack and Vitess.

        

In the words of our friends at Salesforce:

Open source drives our industry forward, kick-starts new careers, and builds trust in the products we create. From using projects, making improvements, and sharing our most impactful innovations with the community–in open source, we want to leave it better than we found it.

 

To read more about the exciting work we're doing, check out the Slack Engineering Blog. If you're interested in working with us, see the Slack Careers page.

 

 

Slack API Logo

If you're looking for Slack developer resources, tools, and SDKs, you'll want to check out the Slack API GitHub Org.

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  1. nebula nebula Public

    A scalable overlay networking tool with a focus on performance, simplicity and security

    Go 16.3k 1.1k

  2. PanModal PanModal Public

    An elegant and highly customizable presentation API for constructing bottom sheet modals on iOS.

    Swift 3.8k 583

  3. circuit circuit Public

    ⚡️ A Compose-driven architecture for Kotlin and Android applications.

    Kotlin 1.8k 100

  4. vscode-hack vscode-hack Public

    Hack language & HHVM debugger support for Visual Studio Code

    TypeScript 75 44

  5. goSDL goSDL Public

    goSDL

    PHP 522 83

  6. hack-sql-fake hack-sql-fake Public

    A library for testing database driven code in Hack

    Hack 75 30

Repositories

Showing 10 of 68 repositories
  • hakana Public

    Another typechecker for Hack, built by Slack

    slackhq/hakana’s past year of commit activity
    Rust 92 MIT 9 0 2 Updated Oct 11, 2025
  • circuit Public

    ⚡️ A Compose-driven architecture for Kotlin and Android applications.

    slackhq/circuit’s past year of commit activity
    Kotlin 1,757 Apache-2.0 100 10 (1 issue needs help) 12 Updated Oct 11, 2025
  • foundry Public

    Gradle and IntelliJ build tooling used in Slack's Android repo

    slackhq/foundry’s past year of commit activity
    Kotlin 462 Apache-2.0 21 9 7 Updated Oct 11, 2025
  • slack-lints Public

    A collection of custom Android/Kotlin lint checks we use in our Android and Kotlin code bases at Slack.

    slackhq/slack-lints’s past year of commit activity
    Kotlin 246 Apache-2.0 16 9 5 Updated Oct 11, 2025
  • astra Public

    Astra is a structured log search and analytics engine developed by Slack and Salesforce

    slackhq/astra’s past year of commit activity
    Java 237 MIT 37 5 4 Updated Oct 10, 2025
  • nebula Public

    A scalable overlay networking tool with a focus on performance, simplicity and security

    slackhq/nebula’s past year of commit activity
    Go 16,284 MIT 1,066 86 37 Updated Oct 10, 2025
  • vitess Public Forked from vitessio/vitess

    Vitess is a database clustering system for horizontal scaling of MySQL.

    slackhq/vitess’s past year of commit activity
    Go 4 Apache-2.0 2,326 0 6 Updated Oct 9, 2025
  • vscode-hack Public

    Hack language & HHVM debugger support for Visual Studio Code

    slackhq/vscode-hack’s past year of commit activity
    TypeScript 75 MIT 44 23 3 Updated Oct 9, 2025
  • go-audit Public

    go-audit is an alternative to the auditd daemon that ships with many distros

    slackhq/go-audit’s past year of commit activity
    Go 1,643 MIT 162 15 12 Updated Oct 6, 2025
  • compose-lints Public

    Lint checks to aid with a healthy adoption of Compose

    slackhq/compose-lints’s past year of commit activity
    Kotlin 453 Apache-2.0 31 18 (5 issues need help) 11 Updated Oct 1, 2025