Open-source & cheaper alternatives to Slack
2 open-source options you can self-host, plus other low-cost picks — independently curated.
| # | Alternative | Why it's a good swap | Pricing |
|---|---|---|---|
| 1 | Mattermost Open sourceGitHub | Open-source team messaging, self-hosted for full data control. | Free / self-host |
| 2 | Rocket.Chat Open sourceGitHub | Open-source team chat with self-hosting and full customization. | Free / self-host |
Independently curated by ToolsTalky. Third-party links are not endorsements; pricing and open-source status can change — verify on the vendor's site.
8 more Communication & Chat tools like Slack
Voice, video, and text chat
4.7 (69)
Freemium from FreeWeb, iOS, Android, Mac, Windows, Linux
307 upvotesCommunication & Chat
Video meetings in your browser
4.6 (32)
Freemium from FreeWeb, iOS, Android
157 upvotesCommunication & Chat