Briar vs Threema

Briar is free messaging software for communication that does not depend on a central server. Messages synchronize directly between users’ devices. Without Internet access, synchronization can use Bluetooth, Wi-Fi or memory cards; with Internet access, Briar can use the Tor network. It provides private messaging, public forums and blogs. The maker says device communications are end-to-end encrypted, contact lists are encrypted on each device, and messages remain stored locally instead of in the cloud. Briar Mailbox can deliver messages securely when users are online at different times. Android distribution includes Google Play, F-Droid and direct APK download. Briar Desktop is available for Linux, Windows and macOS. Desktop lacks Android features including RSS feeds, disappearing messages, nearby contact adding, Bluetooth, removable-drive connections and Tor bridges. The maker’s July 9, 2026 update places Briar in maintenance mode, with essential security updates and bug fixes planned. Reported longstanding issues include high battery use, unreliable Android background operation, no account backup or file attachments, and difficult contact adding and offline communication.

Threema is a paid messaging service for private and business communication, supporting text and voice messages, voice and video calls, group calls, media sharing and file transfers. It can be used without a phone number or email address, and contact synchronization is optional. End-to-end encryption covers messages, media, calls, profile pictures, group names and group-member lists. The apps are open source, with repositories for Android, iOS, macOS, Windows, Linux and Threema Web. The regular desktop app and web client require a mobile device with Threema installed and activated. Threema operates its own servers in Zurich data centers of an ISO 27001-certified colocation partner. It says its apps receive regular audits by recognized security experts, including Cure53 audits in 2020 and 2024. Business tools include Gateway integrations, Work APIs and Broadcast features such as feeds, distribution lists, bots and managed group chats. Private use costs $6, paid once, with price varying by app store and country; Core starts at $3 a month billed annually. A 30-day trial is listed.