# Mattermost vs Slack

Source: https://listme.name/compare/mattermost-vs-slack
Framed by the ranking: https://listme.name/best/team-chat-software

| | Mattermost | Slack |
|---|---|---|
| Score | 88.5 | 93.0 |
| Rank | #4 | #1 |
| Price | Free plan, paid upgrades | Free plan, paid upgrades |
| Best for | Regulated teams that must keep chat on their own servers | Teams that want the largest app ecosystem |
| Hosting | Self-hosted or private cloud | Hosted by Slack |

Self-hosted team chat for private cloud and air-gapped networks, with source published under AGPL-3.0. It asks more of an IT team than Slack, and its Enterprise features sit in paid editions. The widest app and integration catalog here, with huddles, Slack Connect and a free plan that never expires. Its code is closed, and cost rises per user as a team grows.