20
User
Recs.
Recs.
30
Updates
Last
Updated
Updated
Activity
29 Options
SpecsUpdate
PlatformsAndroid / iOS / WP
End-to-end encryptionYes
Mediaimages / video / audio
Audio recordingYes
VoIPNo
PublisherThreema GmbH
GroupsYes
LocationsharingYes
File Size15M
Required Android Version4.0 and up
VideoconferencingNo
Video recordingNo
In-App PurchasesNone
Server stored messagesTransitory
Messaging systemsData
MultideviceNo
Message DeletionNo
Cloud syncNo
Pros
Know any positive aspects of this option?
Cons
Con Not free
Unlike many other options Threema is not free as it costs $1.99 for the app.
Con No forward secrecy or future secrecy
From https://threema.ch/it/faq/why_secure:
Forward secrecy: Threema provides forward secrecy on the network connection (not on the end-to-end layer).
Unlike other end-to-end encrypted messaging apps, Threema’s protocol uses a single key for the lifetime of a chat. Key compromise at some point means compromise of all past and future messages.
Know any negative aspects of this option?
Recommendations
Comments
Out of Date Pros + Cons
Con Closed source
You can't trust their claims if you can't verify them. Edit: Now Threema is open source and aproved by security experts.