I use Wire, which is a neat p2p encrypted messenger: - with an open source app / server - you don't need a mobile phone and you can use a desktop app - Voice ca

I use Wire, which is a neat p2p encrypted messenger: - with an open source app / server - you don't need a mobile phone and you can use a desktop app - Voice call works perfect (really good alternative to skype) - no random crashes at all - (a colleague of mine diskussed some 'minor' issues on twitter - and they fixed in within few days)