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Add to SafariWhen comparing Threema vs ChatSecure + Orbot, the Slant community recommends Threema for most people. In the question“What are the best cross-platform encrypted messaging apps?” Threema is ranked 9th while ChatSecure + Orbot is ranked 10th. The most important reason people chose Threema is:
Registration is handled by random generated IDs. No phone number needed.
Specs
Question Ranking
Pros
Pro Registration without phone number
Registration is handled by random generated IDs. No phone number needed.
Pro Encrypted communication
Provides complete end-to-end encryption.
Pro Company behind Threema is based in Switzerland
Pro Servers in Switzerland
Privacy laws protect the data Threema has.
Pro Supports encrypted group chats
Pro Provides a web client
You can control and message with friends via Threema Web, the official web client for Threema.
Pro Ability to send pics and videos
Threema supports sending media messages such as video, pics and even voice messages.
Pro Group chat polls
Pro Allows verification of contacts identity via QR Code
Pro Passed EFF's security review
To pass EFF's security review ChatSecure had to encrypt data in transit, the encryption had to be end-to-end, the app needed to provide forward secrecy, app's source code has to be open to independent review, users have to be able to verify contact's identities even with the service provider compromised, app's cryptographic design has to be well documented and app's source code has to have been audited in the last 12 months.
Pro Free and open source
ChatSecure is free and open source, enabling anyone to verify its security by auditing the code.
Pro Works with popular chat services across mobile and PC
ChatSecure works with Google Hangouts, Facebook messaging, Jabber and other popular messaging service, making for a convenient way to use secure chatting.
Cons
Con Not free
Unlike many other options Threema is not free as it costs $1.99 for the app.
Con Single device only
You cannot use multiple devices to send messages. However, it does have message mirroring on a web client.
Con No cloud sync
E2E encryption means no cloud syncing of messages.
