You might try posting this under a "Show HN", and/or reconsidering the title. This looks like an interesting and thoughtful tool with a clear purpose, and this title doesn't convey that.
Perhaps you should also make web wrappers over more traditional open source tools like PySCF or Psi4, to compare with MACE. With these additions I think this would be a significantly better tool than the proprietary WebMO. (Have you heard of WebMO before?)
Wow, these are insightful ideas I hadn't thought of. For WebMO, not really. I will look into web wrappers and check out WebMo. Thank you so much for your feedback!