Mattermost vs Novu
| Tagline | Open-source, self-hostable Slack alternative for secure team messaging and collaboration | Open-source notification infrastructure for multi-channel developer alerts |
| Category | Team Chat & Collaboration | Team Chat & Collaboration |
| Replaces | Slack, Microsoft Teams | Slack, Microsoft Teams |
| GitHub stars | 38k | 39k |
| Language | Go | Docker |
| License | MIT | MIT |
| Self-host difficulty | 3/5 Moderate | 3/5 Moderate |
| Deploy options | One-Click Docker Docker Compose Kubernetes Manual | Docker Docker Compose |
| Managed hosting | ||
| Last updated | today | 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.
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
Novu
- Not a real-time team chat; it is a notification delivery layer, not a conversation platform.
- Self-hosted setup requires Postgres, MongoDB, Redis, and S3-compatible storage, adding operational burden.
- Managed cloud features (advanced analytics, SLA guarantees) are not available in the open-source edition.
- Mobile SDK for in-app notifications has fewer features than commercial equivalents like OneSignal.
Bottom line
Both are a similar lift to self-host; choose Novu for the larger community and ecosystem. 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