Mattermost vs Mumble
| Tagline | Open-source, self-hostable Slack alternative for secure team messaging and collaboration | Low-latency, high-quality open-source voice and text chat for gaming and teams |
| Category | Team Chat & Collaboration | Team Chat & Collaboration |
| Replaces | Slack, Microsoft Teams | Slack, Discord, Microsoft Teams |
| GitHub stars | 38k | 8.1k |
| Language | Go | C++ |
| License | MIT | BSD-3-Clause |
| Self-host difficulty | 3/5 Moderate | 3/5 Moderate |
| Deploy options | One-Click Docker Docker Compose Kubernetes Manual | Docker Manual |
| Managed hosting | ||
| Last updated | today | 9 days ago |
| View repo | View repo |
Where each falls short
The honest trade-offs — what you give up with each, versus the proprietary tools they replace.
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
Mumble
- Desktop client only; no official mobile apps with full feature parity (third-party clients exist but are limited).
- No text channel persistence, message history search, or file sharing beyond basic in-channel text.
- UI is dated and less polished compared to Discord or Teams.
- No video calling, screen sharing, or integrations with productivity tools.
Bottom line
Both are a similar lift to self-host; 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
Mumble
Low-latency, high-quality open-source voice and text chat for gaming and teams