Softr

Softr turns a spreadsheet or database into a working web application without writing code. Its most common use is putting a client portal or internal tool on top of an Airtable base, which is the job it was originally built for, though it now connects to more than Airtable alone.

Data can come from Airtable, Google Sheets, Notion, monday.com or Google BigQuery, and Softr can also build and hold databases of its own. On top of that data you assemble the interface: listings, directories, job boards, online courses, e-commerce, upvoting sites, marketplaces and event listings are all templated starting points. The company's claim is that an app can be built and launched in under thirty minutes, which is a fair description of the simpler cases rather than every case.

Permissions are the part that makes it usable for client work. Access is controlled at a granular level, so different users see different records, which is what separates a real portal from a published spreadsheet. Users who share a business email domain with somebody building in the workspace are classified as team users, and builders in the workspace can be added as app users at no cost.