51
Mattermost
Team chat. Source is AGPL unless you buy a commercial licence.
Mattermost vs Slack
Mattermost is listed as software that replaces Slack. It is not a product of Salesforce, and this page is not an endorsement by them. Measured score: 51.
The SaaS
Slack
Product of Salesforce. Software that replaces it.
| Mattermost | Slack | |
|---|---|---|
| Measured score | 51 | — |
| Licence | AGPL-3.0 | Vendor SaaS |
| Stack | TypeScript | — |
| Docker | Not at usual paths | — |
| Hosted option | Vendor cloud listed | Their cloud |
| Last push | 2026-10-15 | — |
| Stars | 39,333 | — |