Polaris Office Web Sheet - Simple open Sheet files on browser without sign-up
Airtable - Airtable works like a spreadsheet but gives you the power of a database to organize anything. Sign up for free.
Magic Spreadsheet - Human workforce and AI plugged into your Google Spreadsheets
Grist - Grist makes it easy to transform spreadsheets into a custom database where data is truly actionable.
Spreadsheet.com - Spreadsheets that come alive as applications
Rowy - Rowy is an open-source low-code platform to build your product, from MVP to scale. Manage your database in a spreadsheet-like UI, write Cloud Functions effortlessly in the browser, build automation with ready-made extensions to your favorite tools.