Open-source Telegram MCP alternatives
The Telegram MCP server is open source and built on Telethon, so you can read exactly how it authenticates and which Telegram APIs it touches before granting it access to your account. That matters when a server acts as a user rather than a bot. Every alternative below publishes its source too.
Reading the repo first is the point of this cut: you can see which calls a server makes, pin the version you trust, and patch behavior yourself rather than filing a ticket. The picks span messaging platforms, with one productivity outlier noted plainly.
The 8 best open-source alternatives
LINE's official server is open source and pushes and broadcasts text and flex messages, manages rich menus, and reads profiles for a LINE Official Account. You can audit exactly what it sends before connecting it to your account.
Set up LINE →Open source and built for a federated network, the Matrix server reads rooms and messages, sends chats, and manages rooms over HTTP. The source lets you confirm what an agent can do on a homeserver you may run yourself.
Set up Matrix →The Mattermost server is open and works with channels, messages, threads, reactions, users, teams, and files. Reading the repo before granting write access is straightforward, which fits a self-hostable team-chat tool.
Set up Mattermost →Open source and self-hostable, the Rocket.Chat community server reads and posts messages and manages threads, DMs, files, reactions, and pins. You can inspect the code that touches your team chat before you trust it.
Set up Rocket.Chat →- TwilioOfficial
Twilio's official server is open and drives SMS, voice, Verify, Lookup, and 1,400+ API endpoints. For a server that can send messages to real phone numbers, having the source to audit is worth the read.
Set up Twilio → - VonageOfficial
Wired into carrier messaging, the Vonage official server publishes its source and sends SMS, WhatsApp, RCS, and voice messages while managing numbers and applications. Open code is reassuring for that kind of reach.
Set up Vonage → - Discord MCPCommunity
The Discord server is open source and runs a bot across messages, channels, forums, roles, and webhooks. You can read precisely which guild permissions it exercises before adding it to a community.
Set up Discord MCP → Not a messaging server, but open source if your agent also touches docs: Notion's server searches, reads, and writes across a workspace. Include it when the work spans Telegram chats and a Notion knowledge base.
Set up Notion →
How to choose
Every server here ships its code, so the differences are platform and reach, not auditability. For consumer messaging, LINE and Discord; for self-hosted team chat, Matrix, Mattermost, and Rocket.Chat; for phones and WhatsApp, Twilio and Vonage. Notion is the outlier, useful only if your agent also handles documents. Whatever you wire in, read the repo first, especially for a server like Telegram's that operates as a user account.
FAQ
- Is the Telegram MCP server open source?
- Yes. The server is open source and built on Telethon, so you can read how it logs in and which Telegram APIs it calls. Since it acts as a user account rather than a bot, auditing that source before connecting it is sensible.
- Why prefer an open-source messaging MCP server?
- You can verify exactly which messages a server can read and send, pin or patch the version you run, and keep credentials on infrastructure you control. For tools that act on a personal account or send to real phone numbers, that visibility is worth having.