Slack (Archived) vs Mattermost
Slack (Archived) is an MCP server published by modelcontextprotocol. Marketplaces we read that list it: 1 (Docker MCP Catalog). Mattermost is an MCP server published by vriesdemichael. Marketplaces we read that list it: 1 (Official MCP Registry). As of our marketplace pass on 2026-10-16. This pair was picked by a reader, not by our comparison rule, so search engines are asked not to index the page.
Where each is published
| Marketplace |   Slack (Archived) |  Mattermost |
|---|---|---|
| Docker MCP Catalog | Listed Version: sha256:4cc10c3f4bd9 Forks (GitHub): 11 788 Pulls (Docker Hub): 312 578 Stars (Docker Hub): 25 Stars (GitHub): 91 289 Not marked · First seen |
Not listed |
| Official MCP Registry | Not listed | Listed Version: 0.3.1 Forks (GitHub): 0 Stars (GitHub): 0 Not marked · First seen |
Each figure is the marketplace's own and is never added up across marketplaces. A marketplace that publishes no figure shows none: no number is not zero.
The facts side by side
| Fact | Slack (Archived) | Mattermost |
|---|---|---|
| Marketplaces that list it | 1 | 1 |
| Stars (GitHub) (differs) | 91 289 (better) | 0 (worse) |
| Pulls (Docker Hub) (differs) | 312 578 | No figure on Docker Hub |
| Forks (GitHub) (differs) | 11 788 (better) | 0 (worse) |
| Last release | Not published | Not published |
| Where it runs (differs) | On your machine (mcp/slack) | On your machine (https://github.com/vriesdemichael/mm-mcp/releases/download/v0.3.1/mm-mcp_0.3.1_darwin_amd64.mcpb) |
| Transport | stdio | stdio |
| Tools it declares (differs) | 8 | Not published |
| Environment variables it asks for (differs) | 3, secrets among them: 1 | 9, secrets among them: 1 |
| Licence (differs) | NOASSERTION | Not stated |
| Repository (differs) | github.com/modelcontextprotocol/servers | github.com/vriesdemichael/mm-mcp |
| Changes in the last 7 days | 0 | 0 |
| First seen | 2026-10-11 | 2026-10-11 |
Lines where the two differ have a tinted background and bold values. Where the data itself says which value is better (more marketplaces, a larger figure of the same marketplace, a fresher release, a verified mark on a marketplace that lists both), the better one is also marked green with ▲ and the worse one red with ▼. Where it runs, the transport, the tools, the settings, hooks, the bundle's parts, the licence and the week's changes are marked only as different: more or fewer is not better in itself.
What each says it does
Slack (Archived)
Interact with Slack Workspaces over the Slack API.
Mattermost
Read, search and post in Mattermost as yourself or a bot.
How to run each
Slack (Archived) As a local MCP server: Docker image
claude mcp add --env "SLACK_BOT_TOKEN=<YOUR_SLACK_BOT_TOKEN>" --transport stdio slack -- docker run -i --rm -e SLACK_BOT_TOKEN mcp/slackRequires: SLACK_BOT_TOKEN (secret)
Mattermost
No data for an automatic command: what its marketplaces declare does not say unambiguously how to connect it.
Requires: MM_TOKEN (secret), MM_URL
Commands built only from what the marketplaces declare; the full set for every client is on each card.
Tools each declares
The marketplaces of Mattermost publish no list of tools, so we do not compare tools.
Settings each asks for
Only Slack (Archived) asks for
SLACK_BOT_TOKEN (secret)SLACK_CHANNEL_IDSSLACK_TEAM_ID
Only Mattermost asks for
MM_MCP_ALLOW_WRITESMM_MCP_ASK_BEFORE_WRITESMM_MCP_CA_FILEMM_MCP_DOWNLOAD_DIRMM_MCP_FORCE_HUMAN_IN_THE_LOOP_IN_CLAUDE_CODEMM_MCP_MARK_AI_GENERATEDMM_MCP_RESOURCE_MAX_MBMM_TOKEN (secret)MM_URL
Settings as each marketplace publishes them. Asking for fewer is not better in itself.
What it can do: Slack (Archived) · What it can do: Mattermost · Compare two other plugins
Data comes from the Docker MCP Catalog (desktop.docker.com/mcp/catalog) and Docker Hub. Data comes from the Official MCP Registry (registry.modelcontextprotocol.io), CC0 1.0. Figures come from our own regular passes over the marketplaces, last read on . We publish no contact details for plugin publishers.