Grist looks similar, and also interesting: https://www.getgrist.com/ https://www.getgrist.com/ The tables are sqlite tables, so the schema has to be rigid, whi

Grist looks similar, and also interesting: https://www.getgrist.com/ https://www.getgrist.com/ The tables are sqlite tables, so the schema has to be rigid, while I think they also offer views that allow you to make more user-friendly views. They also let you run Python inside the formula