AnyCable vs Mattermost
| Tagline | High-performance realtime server for WebSockets and Server-Sent Events | Open-source, self-hostable Slack alternative for secure team messaging and collaboration |
| Category | Team Chat & Collaboration | Team Chat & Collaboration |
| Replaces | Slack, Discord | Slack, Microsoft Teams |
| GitHub stars | 2.3k | 38k |
| Language | Go | Go |
| License | MIT | MIT |
| Self-host difficulty | 4/5 Involved | 3/5 Moderate |
| Deploy options | Docker Docker Compose Manual | One-Click Docker Docker Compose Kubernetes Manual |
| Managed hosting | ||
| Last updated | 3 days ago | today |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
AnyCable
- It is a realtime transport layer, not a full chat product; requires significant custom development to build a user-facing app
- gRPC configuration and tuning adds operational complexity
- No built-in UI, user management, or message persistence — all delegated to the application layer
- Managed AnyCable Cloud only available for certain plans
Mattermost
- Many advanced features (LDAP/AD, SAML/SSO, compliance exports, high availability) are gated behind paid Enterprise tiers
- Search and message UX feel less polished than Slack
- Voice/video calling is more limited than Teams' full meetings stack
- Smaller third-party app/integration marketplace than Slack
Bottom line
Choose Mattermost if you want the lower-effort setup; choose Mattermost for the larger community and ecosystem. Mattermost has seen more recent development. Open each guide below for deploy steps and the full feature gap.
Mattermost
Open-source, self-hostable Slack alternative for secure team messaging and collaboration