AntimatterCompare
Antimatter vs Rocket.Chat
Rocket.Chat is another open-source, self-hostable chat, with a focus on omnichannel customer service and federation.
Why teams choose Antimatter
- A proven server, with fine-grained permissions, a complete API and plugins.
- All features included, with no enterprise edition.
- Voice channels, calls with live captions, notes, whiteboards, kanban and playbooks built in.
When Rocket.Chat may suit you better
- You need end-to-end encrypted messages.
- You want omnichannel live chat with your customers (website chat, email, social messaging) in the same tool.
- You want to federate with the Matrix network.
Feature by feature
| Feature | Antimatter | Rocket.Chat |
|---|---|---|
| Hosting and licensing | ||
| Self-hosted on your own servers | ✓ Yes | ✓ Yes |
| Open-source server | ✓ YesAGPL v3 | ◐ Partlyenterprise features are proprietary |
| Every feature without a paid plan | ✓ Yes | ✕ No |
| Runs offline, without internet access | ✓ Yes | ✓ Yes |
| Messaging | ||
| Channels, direct messages and threads | ✓ Yes | ✓ Yes |
| Unlimited message history | ✓ Yes | ✓ Yes |
| Scheduled messages and reminders | ✓ Yes | ◐ Partlyreminders through apps |
| Message priority and acknowledgements | ✓ Yes | ✕ No |
| Self-destructing (burn-on-read) messages | ✓ Yes | ✕ No |
| Automatic translation of channels | ✓ Yesself-hosted models | ◐ Partlywith a translation provider |
| Calls | ||
| Voice and video calls with screen sharing | ✓ Yes | ◐ Partlythrough a conference app |
| Always-open voice channels | ✓ Yes | ✕ No |
| Live captions and call transcripts | ✓ Yesyour own speech-to-text | ✕ No |
| Apps and AI | ||
| Collaborative notes and documents | ✓ Yes | ✕ No |
| Whiteboards | ✓ Yes | ✕ No |
| Kanban boards | ✓ Yes | ✕ No |
| Incident and process checklists | ✓ Yes | ✕ No |
| Polls | ✓ Yes | ◐ Partlythrough apps |
| AI assistants with the models you choose, self-hosted included | ✓ Yes | ◐ Partlypaid plans |
| Security and administration | ||
| Single sign-on (SAML, OpenID Connect) | ✓ Yes | ✓ Yes |
| LDAP and Active Directory sync | ✓ Yes | ◐ Partlyadvanced sync on paid plans |
| Data retention and compliance export | ✓ Yes | ◐ Partlypaid plans |
| Federation with other servers | ✓ Yesshared channels | ✓ YesMatrix |
| End-to-end encryption of messages | ✕ No | ✓ Yes |
"Partly" means the feature needs a paid plan, an add-on or a plugin, or exists in a limited form; the note says which. Based on each product's public documentation as of October 2026: plans and features change, so check the vendor's own site before deciding. Spotted a mistake? Tell us.