I never heard about Threema before,
quickly glanced at it’s Github repo,
but I think I prefer Matrix/Element over it.
Threema seems to largely rely om GMS (Google Messaging Service),
meaning that most messages will go through Google’s servers,
albeit end-to-end encrypted for now,
I would not be suprised if Google would participate in “Harvest now, Decrypt later”.
There’s actually an option to turn GMS off entirely if that’s a concern (Settings–>About–>Advanced). It comes at the cost of slightly increased battery usage. Sadly Google does have a bit of a monopoly on mainstream Android there.
Having said that, the messages themselves should never pass Google’s servers, just a packet saying “check your Threema server, there’s new stuff waiting for you.”
I never heard about Threema before,
quickly glanced at it’s Github repo,
but I think I prefer Matrix/Element over it.
Threema seems to largely rely om GMS (Google Messaging Service),
meaning that most messages will go through Google’s servers,
albeit end-to-end encrypted for now,
I would not be suprised if Google would participate in “Harvest now, Decrypt later”.
There’s actually an option to turn GMS off entirely if that’s a concern (Settings–>About–>Advanced). It comes at the cost of slightly increased battery usage. Sadly Google does have a bit of a monopoly on mainstream Android there.
Having said that, the messages themselves should never pass Google’s servers, just a packet saying “check your Threema server, there’s new stuff waiting for you.”