SubStack
ThoughtStorms Wiki
Context : NewWritingSpaces
Paid newsletter / blogging site.
It's not worth it? : http://webseitz.fluxent.com/wiki/2020-11-25-HardyTheCaseAgainstSubstack
Substack Notes is their competition with Twitter : https://on.substack.com/p/introducing-notes
See also :
- EMail never goes away