I also want to add the Utopia p2p https://u.is/ https://u.is/ application to this list. It is an all-in-one application, in addition, it guarantees anonymity an

I also want to add the Utopia p2p https://u.is/ https://u.is/ application to this list. It is an all-in-one application, in addition, it guarantees anonymity and complete security of personal data. Unfortunately, so far there is only a desktop version, but I have never used Slack from a mobile phone. Well, plus this app is free.