There's also Wire, IRC, Telegram, and Threema. SMS I also have a subscription on, but that feels different so I didn't include that in my count, and Keybase I h

There's also Wire, IRC, Telegram, and Threema. SMS I also have a subscription on, but that feels different so I didn't include that in my count, and Keybase I haven't used in a while now but that might also be part of the list for some people