Wire is pretty popular in my social circles, less so lately, unfortunately.

The "always on" encryption is great, and it's always been more stable, and had a more complete feature set than Signal, even at launch. Most importantly, migration between devices with Wire is super smooth.

It definitely should be in the poll.

I use Wire, have only two contacts which also using Wire.

I like that they have published the server source code https://github.com/wireapp/wire-server

I use it as well. It has some quirks but generally does what I want it to do.