The wrong Swiss!
"Swiss headquarters, EU servers". That's where wire has gone wrong.
Threema is totally Swiss, been around a few years:
https://threema.ch/en
"What does the name “Threema” stand for?
Threema started life as an abbreviation: “EEEMA”, for “End-to-End Encrypted Messaging Application”. The three “E”s were a bit unwieldy, so it became “Threema”.