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Threema vs Telegram: catalog facts
Threema	Telegram
Paid A one-time purchase is required. Business plans are separate.	Free The apps are free to download and use.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux, Android, iOS
No phone number or email required; the ID is random Apps are open source and the company is based in Switzerland	Chats sync across phones and desktop computers Large groups, channels and bot platform
A one-time purchase is required for each platform Smaller user base than the mainstream encrypted messengers	Relies on Telegram's central servers Apps are open source but the server software is not published
Downloadable app	Downloadable app, Hosted service
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
Not stated if an account is needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 2, 2026

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