My daughters took classes on Outschool for 4 years. Outschool disrupted the after-school business at the time~ by attracting great teachers and offering interesting teaching solutions for children in K-12. However, their customer service is appalling. If you have a problem, they are ineffective at solving issues and limited to copy/pasting responses (see pictures attached). Over the past three months or so, the Outschool platform requires to upgrade zoom--if not, the link for the class won't launch and your child if he/she is at home with a caregiver will miss the class.
The good news is that there's plenty of competition coming to this space.
Outschool is more concerned with getting your children pronouns right than solving basic technical glitches--can't they solve both? They are based in San Francisco after all!