Rocket.Chat
46kCommunications platform that puts data protection first (alternative to Gitter.im and Slack).
Communication - Custom Communication SystemsMIT
SimpleX Chat
The most private and secure chat and applications platform - now with double ratchet E2E encryption.
Details
- Website
- github.com
- Source
- github.com
- Licence
- AGPL-3.0
- Platforms
- Haskell
- GitHub stars
- 19,580
- Last update
- 2026-10-03
Open-source alternative to
Categories
Alternatives to SimpleX Chat
See all Communication - Custom Communication Systems →Novu
40kNotification infrastructure for developers.
Communication - Custom Communication SystemsMIT
Mattermost
39kPlatform for secure collaboration across the entire software development lifecycle, can be integrated with Gitlab (alternative to Slack).
Communication - Custom Communication Systems⊘ Proprietary
Chatwoot
38kCustomer communication platform (alternative to Intercom and Zendesk).
Communication - Custom Communication Systems⊘ Proprietary
ntfy
35kPush notifications to phone or desktop using HTTP PUT/POST, with Android app, CLI and web app, similar to Pushover and Gotify.
Communication - Custom Communication SystemsApache-2.0
Zulip
26kZulip is a powerful, open source group chat application.
Communication - Custom Communication SystemsApache-2.0