A hosted team-chat platform, priced per active user, that stores your organization's conversations in Salesforce's cloud.
Per-user monthly plans; the free tier hides older message history
Per-user pricing scales painfully, the free tier caps your searchable history, and your team's entire communication record lives in a vendor's cloud. Self-hosted chat keeps it on infrastructure you run.
| Alternative | License | Self-host | Pricing | Sovereignty |
|---|---|---|---|---|
| Mattermost★ | AGPL-3.0 | Yes | Free self-host; paid Enterprise | 88 |
| Zulip | Apache-2.0 | Yes | Free self-host; paid cloud | 88 |
| Rocket.Chat | MIT | Yes | Free self-host; paid cloud/enterprise | 85 |
Self-hosted team chat built for security-conscious orgs.
Self-hosted team chat built for security-conscious orgs.
Mattermost is an open-source, self-hostable Slack alternative with strong security and compliance features, popular with engineering and defense/regulated teams that need to own their data.
Threaded team chat that keeps conversations organized.
Zulip is an Apache-2.0 open-source chat app whose topic-based threading model keeps busy teams' discussions searchable and organized. Self-host it or use the hosted option.
MIT-licensed, highly customizable team communication.
Rocket.Chat is a permissively licensed (MIT) open-source communications platform you can self-host and reshape freely, with chat, voice, and omnichannel features.
Entry last verified 2026-07-04. Licenses and pricing change — spotted something out of date? That's a correction we want.