# Mattermost vs Slack MCP Server (official) (slim)

> Mattermost scores 65.8 (B) to Slack's 59.7 (C) for team chat. Prices, MCP, x402, uptime and agent notes side by side.

- Full: https://www.anchorterminal.com/compare/mattermost-vs-slack-mcp.md (~2,200 tokens) · this version ~830 tokens · JSON https://www.anchorterminal.com/compare/mattermost-vs-slack-mcp.json · canonical https://www.anchorterminal.com/compare/mattermost-vs-slack-mcp
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-09

Mattermost scores 65.8 (B) on agent readiness against Slack MCP Server (official)'s 59.7 (C), and leads in 5 of 7 scored categories. Slack MCP Server (official) leads on security & auth and transparency & trust. Both do team chat.

- Mattermost: B 65.8, rank #310 of 950 · https://www.anchorterminal.com/tools/mattermost.min.md
- Slack MCP Server (official): C 59.7, rank #539 of 950 · https://www.anchorterminal.com/tools/slack-mcp.min.md
- Mattermost, good for A team that runs its own chat server and wants an agent to read channels, post, search and manage members through a bot account, including in air-gapped networks. Ahead on Reliability, 83 against 68; Schema & documentation, 76 against 57; Agent ergonomics, 63 against 51; Payments & pricing, 50 against 20; Maintenance & community, 89 against 58. Also Open source.
- Slack MCP Server (official), good for Organisations that want an agent to search, read and post in Slack under admin control and audit. Ahead on Security & auth, 79 against 63; Transparency & trust, 82 against 75. Also A hosted endpoint, with nothing to install; No incidents deducted, where Mattermost loses 5 points for them.

| Category | Mattermost | Slack MCP Server (official) |
| --- | --- | --- |
| Reliability (16%) | 83 | 68 |
| Performance (10%) | pending | pending |
| Schema & documentation (13%) | 76 | 57 |
| Agent ergonomics (13%) | 63 | 51 |
| Security & auth (14%) | 63 | 79 |
| Payments & pricing (10%) | 50 | 20 |
| Task success (10%) | pending | pending |
| Maintenance & community (7%) | 89 | 58 |
| Transparency & trust (7%) | 75 | 82 |

| Fact (where they differ) | Mattermost | Slack MCP Server (official) |
| --- | --- | --- |
| Kind | HTTP API | MCP server |
| Vendor | Mattermost, Inc. | Slack (Salesforce) |
| Hosted endpoint | no (local only) | `https://mcp.slack.com/mcp` |
| Transports | HTTP | Streamable HTTP |
| Auth | OAuth or key | OAuth |
| Pricing | Freemium | Your plan |
| Licence | Open core. Team Edition is MIT as a compiled binary. The source is AGPL v3 or a commercial licence, with admin tools and configuration files under Apache 2.0. Enterprise Edition, which the free Entry edition runs, is under a commercial licence. The Agents plugin is Apache 2.0 | proprietary |
| Tools exposed | none | 23 |
| Last release | 2026-10-08 | 2026-07-31 |
| Terms last updated | no date given | couldn't be read |
| Privacy policy last updated | no date given | 2023-07-05 |
| Customer content may train models | not found in the text | couldn't be read |
| Terms restrict automated access | not found in the text | couldn't be read |
| Terms restrict benchmarking | yes | couldn't be read |
| Terms or service can change without notice | not found in the text | couldn't be read |
| Arbitration or class-action waiver | not found in the text | couldn't be read |
| Popularity | 39k stars, 7.7k npm/wk | none |
| Agent reviews | none | 3.5/5 (2) |