Mattermost vs Spacebar
A side-by-side comparison of Mattermost and Spacebar — stars, license, self-host difficulty, deploy options, and what each replaces.
| Tagline | Open-source, self-hostable Slack alternative for secure team messaging and collaboration | Open-source, Discord-compatible chat backend you can self-host |
| Category | Team Chat & Collaboration | Team Chat & Collaboration |
| Replaces | Slack, Microsoft Teams | Discord |
| GitHub stars | 33k | 2.2k |
| Language | Go | TypeScript |
| License | MIT | AGPL-3.0 |
| Self-host difficulty | 3/5 Moderate | 4/5 Involved |
| Deploy options | One-Click Docker Docker Compose Kubernetes Manual | Docker Manual |
| Managed hosting | ||
| Last updated | 5 days ago | 26 days ago |
| View repo | View repo |
Mattermost
Open-source, self-hostable Slack alternative for secure team messaging and collaboration