Slack

Sure, Slack Slack is awesome.

But have you considered these open source alternatives?

They are free, self-hostable and community-driven.

Check by yourself: Discourse  Discourse , Answer  Answer ,  Colanode (server) .

  1. So is Discourse Discourse

    A platform for community discussion

    ★ 43.9K Forum License: Apache-2.0

    Discourse is the online home for your community. We offer a 100% open source community platform to those who want complete control over how and where their site is run.

    HomeExchange

  2. So is Answer Answer

    Q&A platform software for teams

    ★ 14.4K Q&A Forum License: Apache-2.0

    A Q&A platform software for teams at any scales. Whether it’s a community forum, help center, or knowledge management platform, you can always count on Answer.

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  3. So is Colanode (server)

    Collaboration workspace

    ★ 1.2K Knowledge base Note-taking Collaboration Messaging License: Apache-2.0

    Colanode is an all-in-one platform for easy collaboration, built to prioritize your data privacy and control. Designed with a local-first approach, it helps teams communicate, organize, and manage projects—whether online or offline. With Colanode, you get the flexibility of modern collaboration tools, plus the peace of mind that comes from owning your data.

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