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TelegramThreema
Free

The apps are free to download and use.

 Paid

A one-time purchase is required. Business plans are separate.

Windows, macOS, Linux, Android, iOS Windows, macOS, Linux, Android, iOS, Web
  • Chats sync across phones and desktop computers
  • Large groups, channels and bot platform
  • No phone number or email required; the ID is random
  • Apps are open source and the company is based in Switzerland
  • Relies on Telegram's central servers
  • Apps are open source but the server software is not published
  • A one-time purchase is required for each platform
  • Smaller user base than the mainstream encrypted messengers
Downloadable app, Hosted service Downloadable app
Open source Open source
License: GPL-3.0 License: AGPL-3.0
Account needed Not stated if an account is needed
Needs internet Not stated if it works offline

Checked October 2, 2026

Checked September 22, 2026

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