The demos are pretty cool though, especially the collaboration + comments one.
We haven’t yet seen any other complete real-time collaborative editing solution on the market (excluding Google Docs and Dropbox Paper which you can’t integrate with your application). And I think that it's not a coincidence that we're first here. This field is extremely demanding and we're one of the very few who have the experience in it.
We totally understand that there will always be the free option out there, but we're sure that those who opt to go with CKEditor precisely understand the benefits of what they're paying for.
Check out the demo on https://docs.ckeditor.com/ckeditor5/latest/features/collabor...