Threema is a Swiss-based messaging service that has focused on security since its 2012 launch. Today, it has over 12 million users and roughly 8,000 organizations worldwide. This month, the ownership of Threema moved to Comitis Capital GmbH.
Using this app, you do not need a phone number or email address. Instead, Threema assigns you a random eight-digit ID. All your contacts, groups, and profiles are stored on your device, and not on a central server. When you send a text, it is deleted from Threema’s servers immediately after delivery, and connection data is not logged.
Threema is a paid app with a one-time payment of $6 for personal use. It is available on major app stores and through the Threema Shop, which supports anonymous payment methods.
Why we like it: We like Threema because it removes identity from messaging. It keeps servers quiet, devices in control, and business incentives clean. For people who want privacy by design rather than promises, Threema delivers that discipline.
Under the hood, Threema uses high-grade cryptography based on the open source NaCl library. Each message is protected by two layers of encryption. One between the users and another is securing the connection to the server. The encryption strength is equivalent to 2048-bit RSA and includes Perfect Forward Secrecy.
You can send text and voice messages, share files up to 100 MB, and send photos, videos, or locations. Messages can be edited or deleted on the recipient’s device within six hours. Voice and video calls are end-to-end encrypted, including group calls with up to 16 participants. These groups are managed locally and support up to 256 members.
Who it’s for:
-Users who want strong privacy without sharing personal details
-People who prefer European data protection standards
-Professionals and organizations with strict compliance needs
-Anyone willing to pay once for a privacy-first product
Who should look elsewhere:
-Users who want a free app with a massive reach
-People who rely on large public groups or channels
-Those who prefer cloud-based chat history by default
Threema features: End-to-end encrypted messaging and calls | Threema ID without phone number | Open source mobile apps | QR-based contact verification | Encrypted voice and video calls | Polls and local group management | Secure desktop and multi-device support
