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Self-hosted alternatives

Open source alternatives to Microsoft Teams

Microsoft Teams mixes hosted chat, meetings, and files for organisations that already use Microsoft 365.

Published by Microsoft. The projects below are sorted by GitHub stars. Star counts and last commit dates are read from the public GitHub API. The line under each name is generated from the category, the licence, and whether the project can be self-hosted. Fetched . 5 of 5 have an OSI-approved SPDX licence, a commit in the last 12 months, and a repository GitHub has not archived.

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  1. 1Rocket.Chat

    RocketChat/Rocket.Chat

    Team chat. Licence: MIT. Self-hosted: yes.

    Licence
    MITOpen core
    GitHub stars
    46,274
    Last commit

    Counts as open source: OSI-approved licence, commit within 12 months, and the repository is not archived.

    Repository on GitHubProject site

    Also listed as an alternative to Slack.

  2. 2Mattermost

    mattermost/mattermost

    Team chat. Licence: AGPL-3.0-only. Self-hosted: yes.

    Licence
    AGPL-3.0-onlyOpen core
    GitHub stars
    39,333
    Last commit

    Counts as open source: OSI-approved licence, commit within 12 months, and the repository is not archived.

    Repository on GitHubProject site

    Also listed as an alternative to Slack.

  3. 3Jitsi Meet

    jitsi/jitsi-meet

    Team chat. Licence: Apache-2.0. Self-hosted: yes.

    Licence
    Apache-2.0
    GitHub stars
    30,078
    Last commit

    Counts as open source: OSI-approved licence, commit within 12 months, and the repository is not archived.

    Repository on GitHubProject site

    Also listed as an alternative to Zoom.

  4. 4Element Web

    element-hq/element-web

    Team chat. Licence: AGPL-3.0. Self-hosted: yes.

    Licence
    AGPL-3.0
    GitHub stars
    13,575
    Last commit

    Counts as open source: OSI-approved licence, commit within 12 months, and the repository is not archived.

    Repository on GitHubProject site

    Also listed as an alternative to Slack.

  5. 5Nextcloud Talk

    nextcloud/spreed

    Team chat. Licence: AGPL-3.0. Self-hosted: yes.

    Licence
    AGPL-3.0
    GitHub stars
    2,215
    Last commit

    Counts as open source: OSI-approved licence, commit within 12 months, and the repository is not archived.

    Repository on GitHubProject site

    Also listed as an alternative to Zoom.

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