keybase.io has been great, although it's not without its risks either since it was acquired by Zoom. It's still up and seemingly maintained but AFAIK there's no new feature work.
I've heard WhatsApp recommended from people I trust, but I have never personally used it so can't speak from experience.
The legal team at the company I work for are suggesting to remove keybase and treat it as compromised as there is no way of knowing of keys and other data has not been shared with the Chinese government. No proof at all of course, just the world we live in I guess :)
I've heard WhatsApp recommended from people I trust, but I have never personally used it so can't speak from experience.