Do you like #Mastodon ?

Probably you would love #Matrix too, it's decentralized like Mastodon but it's a replacement for instant messaging apps (like #Whatsapp #XMPP #Telegram #Wire #Signal etc), chat rooms (like #IRC #Slack etc) and VoIP (like #Skype #Hangouts #Ring etc).

Matrix basically is a protocol, like e-mails, and it's explained at matrix.org, read the FAQs, are really interesting).

Apps can implement Matrix, the best client is #Riot (https://riot.im), available for Web and mobile.