Privacy: Encrypted Messaging
Audited?
Available on Linux?
Available on Mac?
Available on Windows?
Available on Android?
Available in F-Droid?
Available on iOS?
Decentralized?
Additional notes?
Signal
Yes
Yes
Yes
Yes
Yes
No
Yes
No
Phone number required for signup
SimpleX
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Early in development
Threema
Yes
In beta
In beta
In beta
Yes
No
Yes
No
Not free