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ThreemaWhatsApp
Paid

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

 Free

Free to use for personal messaging and calls.

Windows, macOS, Linux, Android, iOS, Web Windows, macOS, Android, iOS, Web
  • No phone number or email required; the ID is random
  • Apps are open source and the company is based in Switzerland
  • End-to-end encrypted messages and calls
  • Available on phones, desktop and the web
  • A one-time purchase is required for each platform
  • Smaller user base than the mainstream encrypted messengers
  • Proprietary and tied to a phone number account
  • Relies on a central service run by the developer
Downloadable app Downloadable app, Web application
Open source Closed source
License: AGPL-3.0 License not stated
Not stated if an account is needed Account needed
Not stated if it works offline Needs internet

Checked September 22, 2026

Checked September 24, 2026

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