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Telegram vs Telegram X FOSS: catalog facts
Telegram	Telegram X FOSS
Free The apps are free to download and use.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux, Android, iOS	Android
Chats sync across phones and desktop computers Large groups, channels and bot platform	Based on TDLib with smooth animations FOSS-friendly build distributed through F-Droid
Relies on Telegram's central servers Apps are open source but the server software is not published	Unofficial fork, not maintained by Telegram Android only
Downloadable app, Hosted service	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Account needed	Account needed
Needs internet	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.