Threema is a messaging application developed by the Swiss company Threema GmbH that offers cross-platform, end-to-end encrypted text, voice and video communication for both private users and organizations (via business editions). It supports Android, iOS and desktop/web usage.
If you’re looking for a messaging solution where your communications and metadata aren’t harvested, tracked or monetised, Threema offers a strong alternative to mainstream apps. It emphasises privacy (you can register without a phone number or email), Swiss-based infrastructure, and no advertising or user-profiling.
For organisations, it brings a privacy-centric collaboration platform that can meet regulatory and security needs (e.g., for schools, NGOs, companies).
