We've been providing online whiteboards, mainly for online tutoring, for the past 20 years: https://www.groupboard.com https://www.groupboard.com We were the

We've been providing online whiteboards, mainly for online tutoring, for the past 20 years: https://www.groupboard.com https://www.groupboard.com We were the first online whiteboard, and there have been quite a few that have come and gone over the years. As you say, many seem to be run as a hobby, with minimal support. There are many free online whiteboards out there, and it's difficult to make money from it that way unless you have some kind of paid-for premium version. Our software is used by the largest online tutoring company in the UK, as well as many 1-person online tutors.