Open-source Matrix MCP alternatives
The Matrix MCP server is open source, fitting for a project built around an open, federated protocol. You can already read how it reads rooms, sends chats, and manages homeservers. The reason to compare against the open-source servers below is usually that your conversations live on a different platform, and you still want code you can audit before an agent posts on your behalf.
Each option here publishes its source. You can read which calls it makes, pin a version, and patch behaviour yourself, which matters for any tool that can send messages to real people.
The 8 best open-source alternatives
Built on Telethon and fully open source, the Telegram server reads chats, manages groups and contacts, and sends or modifies messages and media. The repo shows exactly what an agent can do in an account.
Set up Telegram →Pushes or broadcasts text and flex messages, manages rich menus, and reads profiles, with its source published. Reading the code confirms what it can broadcast to an audience.
Set up LINE →An open-source server for Mattermost covering channels, messages, threads, reactions, users, teams, and files. Source you can vet for a self-run team-chat product.
Set up Mattermost →Reads and posts messages for Rocket.Chat while managing threads, DMs, files, reactions, and pins, all open source. The code confirms its reach across team chat.
Set up Rocket.Chat →- TwilioOfficial
Twilio's official server is open source and exposes SMS, voice, Verify, Lookup, and 1,400+ endpoints as tools. Auditing it matters because it places real calls and sends real messages.
Set up Twilio → - VonageOfficial
Open source and multichannel, Vonage sends SMS, WhatsApp, RCS, and voice, manages numbers, and pulls reports. The repo lets you check which channels an agent can touch.
Set up Vonage → - Discord MCPCommunity
This open-source community server runs a Discord bot across messages, channels, forums, roles, and webhooks. Reading the source before granting bot permissions is straightforward.
Set up Discord MCP → Notion's server is open source but aimed at a workspace, not chat: search, read, and write pages and databases. Include it only if the messages you sent on Matrix were really publishing content into docs.
Set up Notion →
How to choose
Every pick publishes its code, including Matrix itself, so the choice comes down to platform rather than auditability. Telegram and Discord are the closest open swaps for community chat; Mattermost and Rocket.Chat fit self-run team chat. Twilio and Vonage cover phone channels, LINE broadcasts to an audience, and Notion only fits if your messaging was really content. Read the repo before handing any of them send or post access.
FAQ
- Is the Matrix MCP server open source?
- Yes. The Matrix server is a community, open-source project, so you can read how it reads rooms, sends chats, and manages homeservers. The alternatives on this page are open source too, which lets you compare implementations directly.
- Why pick an open-source chat MCP server?
- You can read exactly which send and read calls the server can make, pin or patch the version you run, and keep credentials on infrastructure you control. That matters most for tools that can post to channels or message real contacts.