I have just updated the Database Comparator to include Tadabase - and also made it available as a Google Sheet so that it's more accessible for people.
Tadabase, which has been in beta now for some time, has been officially 'launched' today. You can build really nice looking apps with it using a very flexible screen designer: Very similar to Knack in many ways (check out this comparison https://tadabase.io/tadabase-vs-knack ), it has loads of features for building sophisticated solutions. More to follow in the next few days in the form of a review and I will add it to my side by side comparison document as well.