AI · alternatives · 2026

24 alternatives to Host your own open source Slack-like chat platform

Centralize real-time messaging, voice, video, AI, and apps for secure, reliable and unified communication among internal and external stakeholders.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Host your own open source Slack-like chat platform launched in 2015; newer entries below may have overtaken it.

1. 1
   Slack▲2,714

   Be less busy. Real-time messaging, archiving & search.

   2013 · slack.com · its alternatives →

2. 2
   Calls on Slack▲725

   Make voice calls in Slack

   2016 · its alternatives →

3. 3
   Buzz▲161

   Your people, your agents, your project — all in one place

   Jul 2026 · buzz.xyz · its alternatives →

4. 4
   Slack Video Calls▲773

   Talking face-to-face with your team is just one click away

   2016 · slack.com · its alternatives →

5. 5
   ChatGPT for Slack▲116

   A new app for Slack that uses ChatGPT

   2023 · salesforce.com · its alternatives →

6. 6
   Integral ▲760

   i've been a power user of slack/discord and etc. since i was a kid and i dont like the fact that they get unusable/noisy after 20 members join. so i designed integral to get rid of the 2 biggest causes of noise on slack/discord and similar apps: 1. channels 2. recency based feed i've replaced these 2 with a few subtle features (different approaches for business vs communities). check it out and let me know what you think :)

   2024 · integralhq.com · its alternatives →

7. 7
   Slack Shared Channels▲480

   Work with anyone in Slack

   2017 · slack.com · its alternatives →

8. 8
   Rocket.Chat▲152

   Your own open source Slack-like chat

   2015 · rocket.chat · its alternatives →

9. 9
   Slackin▲293

   Create your own public Slack chat community

   2015 · github.com · its alternatives →

10. 10
    Api.ai for Slack▲420

    Build a smart conversational Slack bot in 5 minutes.

    2016 · its alternatives →

11. 11
    Many to Slack▲182

    A public chat room fully integrated into Slack

    2017 · get.slaask.com · its alternatives →

12. 12
    Thread Messaging on Slack▲710

    Keep conversations organized and easy to follow with Threads

    2017 · slack.com · its alternatives →

13. 13
    Slack 4.0▲472

    A snappier, more efficient Slack desktop experience

    2019 · slack.com · its alternatives →

14. 14
    #Startup Chat▲358

    The global startup community, on Slack

    2014 · hashtagstartup.co · its alternatives →

15. 15
    Let's Chat▲323

    Like Slack, but opensource and self-hosted.

    2015 · sdelements.github.io · its alternatives →

16. 16
    Slacking Pigeons▲109

    Chat in real time with your users directly from Slack

    2017 · its alternatives →

17. 17
    Slack with your Users▲339

    Speak to your app's users entirely within Slack

    2015 · its alternatives →

18. 18
    Slack▲93

    Platform for team communication

    2015 · slack.com · its alternatives →

19. 19
    Smallchat Beta▲372

    Slack integration for chatting with visitors to your website

    2017 · small.chat · its alternatives →

20. 20
    Chat Data 2.0 With Realtime Voice Rag▲215

    24/7 custom AI livechat + realtime voice chatbot

    2024 · chat-data.com · its alternatives →

21. 21
    Now by Ekko▲121

    Embed a slack-like chat in a few minutes on your website

    2019 · its alternatives →

22. 22
    Chatterbox▲223

    Live chat with your to-be customers straight from your Slack

    2017 · retainly.co · its alternatives →

23. 23
    Node.js Messenger▲140

    A small alternative to Slack

    2017 · totaljs.com · its alternatives →

24. 24
    Mantle Chat▲298

    Collaboration platform where teams work with AI together

    May 2026 · mantle.chat · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →