Independent media for a more open internet.

Alternatives to Slack

3 free, open-source or pay-once options we checked.

The paid app

Slack

Paid plans · from $8.75/user/month · Windows, Mac, Linux, iPhone & iPad, Android, Web browser

Free plan with 90 days of history and up to 10 apps. Pro is US$8.75 and Business+ US$18 per user per month billed monthly (US list prices).

Download Official site
Works on
Difficulty

  • Element

    Element (New Vector Ltd)

    Open source AGPL-3.0-only OR GPL-3.0-only

    Open-source, end-to-end encrypted chat on the Matrix network.

    Works on: Windows, Mac, Linux, iPhone & iPad, Android, Web browser, Your own server

    Difficulty: Easy
    Download Official site Compare

  • Mattermost

    Mattermost, Inc.

    Open source Open core · AGPL-3.0-only

    Self-hosted team chat for organizations that want more control.

    Works on: Windows, Mac, Linux, iPhone & iPad, Android, Web browser, Your own server

    Difficulty: Advanced
    Download Official site Compare

  • Zulip

    Kandra Labs, Inc.

    Open source Apache-2.0

    Open-source team chat organised by topic, with a free hosted plan.

    Works on: Windows, Mac, Linux, iPhone & iPad, Android, Web browser, Your own server · from $6.67/user/month

    Difficulty: Easy
    Download Official site Compare