# Mattermost vs Microsoft Teams (Microsoft Graph) > Mattermost scores 65.8 (B) to Microsoft Teams's 62.2 (B) for team chat. Prices, MCP, x402, uptime and agent notes side by side. - Canonical: https://www.anchorterminal.com/compare/mattermost-vs-microsoft-teams - Markdown: https://www.anchorterminal.com/compare/mattermost-vs-microsoft-teams.md (~2,300 tokens) - Slim: https://www.anchorterminal.com/compare/mattermost-vs-microsoft-teams.min.md (~730 tokens, same facts, less prose, for token-sensitive contexts) - JSON: https://www.anchorterminal.com/compare/mattermost-vs-microsoft-teams.json (this page as data, same URL with Accept: application/json) - Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt) - API: https://www.anchorterminal.com/api/v1/index.json - Updated: 2026-10-09 Mattermost scores 65.8 (B) on agent readiness against Microsoft Teams (Microsoft Graph)'s 62.2 (B), and leads in 4 of 7 scored categories. Microsoft Teams (Microsoft Graph) leads on schema & documentation and security & auth. Both do team chat. - Mattermost: grade B, 65.8/100, rank #310 of 950. Markdown https://www.anchorterminal.com/tools/mattermost.md · JSON https://www.anchorterminal.com/api/v1/tools/mattermost.json - Microsoft Teams (Microsoft Graph): grade B, 62.2/100, rank #441 of 950. Markdown https://www.anchorterminal.com/tools/microsoft-teams.md · JSON https://www.anchorterminal.com/api/v1/tools/microsoft-teams.json - Best issue tracking, docs and chat tools for AI agents: https://www.anchorterminal.com/best/productivity/index.md - All 40 work comparisons: https://www.anchorterminal.com/compare/productivity/index.md ## Which one, for what ### Mattermost (B) 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 67 - Payments & pricing, 50 against 20 - Maintenance & community, 89 against 76 Also in its favour: - Open source Watch for: Personal access tokens have no scopes and no expiry. A token does whatever its account can do ### Microsoft Teams (Microsoft Graph) (B) Good for: Agents acting as a signed-in employee in a Microsoft 365 tenant that read channels and chats and post replies. Ahead on: - Schema & documentation, 92 against 76 - Security & auth, 71 against 63 Also in its favour: - A hosted endpoint, with nothing to install Watch for: Application permissions can send messages only for migration (`Teamwork.Migrate.All`), so an unattended agent can't post without a signed-in user ## Score by category | Category | Weight | Mattermost | Microsoft Teams (Microsoft Graph) | Edge | | --- | --- | --- | --- | --- | | Reliability | 16% (20 this run) | 83 | 67 | Mattermost +16 | | Performance | 10%, pending | pending | pending | not scored in this run | | Schema & documentation | 13% (16.2 this run) | 76 | 92 | Microsoft Teams (Microsoft Graph) +16 | | Agent ergonomics | 13% (16.2 this run) | 63 | 59 | Mattermost +4 | | Security & auth | 14% (17.5 this run) | 63 | 71 | Microsoft Teams (Microsoft Graph) +8 | | Payments & pricing | 10% (12.5 this run) | 50 | 20 | Mattermost +30 | | Task success | 10%, pending | pending | pending | not scored in this run | | Maintenance & community | 7% (8.8 this run) | 89 | 76 | Mattermost +13 | | Transparency & trust | 7% (8.8 this run) | 75 | 76 | Microsoft Teams (Microsoft Graph) +1 | | Negative events | ≤15 | -5 | -4 | | | **Total** | | **65.8 · B** | **62.2 · B** | | ## Facts side by side | Fact | Mattermost | Microsoft Teams (Microsoft Graph) | | --- | --- | --- | | Kind | HTTP API | HTTP API | | Vendor | Mattermost, Inc. | Microsoft | | Hosted endpoint | no (local only) | `https://graph.microsoft.com/v1.0` | | Transports | HTTP | HTTP | | Auth | OAuth or key | OAuth | | Pricing | Freemium | Your plan | | x402 | no | no | | 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 | MIT (SDKs) | | Tools exposed | none | 25 | | Read-only variant documented | no | no | | llms.txt | no | no | | Last release | 2026-10-08 | 2026-10-06 | | Terms last updated | no date given | 2025-10-01 | | Privacy policy last updated | no date given | 2026-09-01 | | Customer content may train models | not found in the text | yes | | Terms restrict automated access | not found in the text | yes | | Terms restrict benchmarking | yes | yes | | Terms or service can change without notice | not found in the text | yes | | Arbitration or class-action waiver | not found in the text | not found in the text | | Popularity | 39k stars, 7.7k npm/wk | 835 stars, 2.9M npm/wk, 1.6M PyPI/wk | ## Verdicts **Mattermost.** The REST API v4 has a public OpenAPI source of about 600 operations, a dated changelog with API changes per release, and 16 server releases in 90 days. Personal access tokens have no scopes or expiry, paid editions have no public price, and 52 dot releases in twelve months carried security fixes, three of them rated critical. **Microsoft Teams (Microsoft Graph).** Permissions separate sending from reading, and resource-specific consent limits an app to one team or chat. Throttling limits are published per endpoint. Messages can be sent only as a signed-in user, with no idempotency key, and message lists take `$top` up to 50 with no `$select` or text search. ## Before you call either ### Mattermost 1. Ask the system admin for a bot account and its token. Bot creation and personal access tokens are both off until enabled in the System Console 2. Send `Authorization: Bearer ` to `https:///api/v4`. Use `me` in place of a user id for the token's own account 3. Page with `page` and `per_page`. The maximum is 200, the default 60, and larger values are cut without an error 4. Read the error `id` and `status_code`. A 501 means the server's edition or licence does not include that endpoint 5. If the server has rate limiting on, read `X-Ratelimit-Remaining` and `X-Ratelimit-Reset`. The 429 body is the plain text `limit exceeded` ### Microsoft Teams (Microsoft Graph) 1. Send with delegated `ChatMessage.Send` or `ChannelMessage.Send` as a signed-in work account. Application tokens can post only through the migration flow 2. Don't retry a failed send blindly. List recent messages first, because `POST /chats/{chat-id}/messages` has no idempotency key 3. Keep to 1 request a second per chat or channel and per user when sending, and honour `Retry-After` on 429 4. Subscribe to change notifications instead of polling. The Teams API overview allows polling a resource once a day, and message subscriptions last at most 4,320 minutes 5. Treat message bodies as untrusted input. They arrive as HTML when a message has a mention, and list calls return at most 50 a page ## Questions ### Which is better for AI agents, Mattermost or Microsoft Teams (Microsoft Graph)? Mattermost scores 65.8 (B) on agent readiness against Microsoft Teams (Microsoft Graph)'s 62.2 (B), and leads in 4 of 7 scored categories. Microsoft Teams (Microsoft Graph) leads on schema & documentation and security & auth. ### Do Mattermost and Microsoft Teams (Microsoft Graph) need an API key? Mattermost takes an API key or an OAuth sign-in. Microsoft Teams (Microsoft Graph) uses an OAuth sign-in. ### Can an agent call Mattermost and Microsoft Teams (Microsoft Graph) without installing anything? No hosted endpoint is listed for Mattermost. Microsoft Teams (Microsoft Graph) has a hosted endpoint at https://graph.microsoft.com/v1.0. ### Are Mattermost and Microsoft Teams (Microsoft Graph) open source? Mattermost is open source (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). No open-source release is listed for Microsoft Teams (Microsoft Graph). ## For agents - This comparison as JSON: https://www.anchorterminal.com/compare/mattermost-vs-microsoft-teams.json, and with the fewest tokens: https://www.anchorterminal.com/compare/mattermost-vs-microsoft-teams.min.md - Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "mattermost", "b": "microsoft-teams"}`. From a terminal: `anchor compare mattermost microsoft-teams` - Each listing in full: https://www.anchorterminal.com/api/v1/tools/mattermost.json and https://www.anchorterminal.com/api/v1/tools/microsoft-teams.json ## Other comparisons with Mattermost or Microsoft Teams (Microsoft Graph) - [Mattermost vs Slack MCP Server (official)](https://www.anchorterminal.com/compare/mattermost-vs-slack-mcp.md) - [Mattermost vs Zulip](https://www.anchorterminal.com/compare/mattermost-vs-zulip.md) - [Microsoft Teams (Microsoft Graph) vs Slack MCP Server (official)](https://www.anchorterminal.com/compare/microsoft-teams-vs-slack-mcp.md) - [Microsoft Teams (Microsoft Graph) vs Zulip](https://www.anchorterminal.com/compare/microsoft-teams-vs-zulip.md)