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
Spreadsheet.com - Spreadsheets that come alive as applications
JotForm Tables - Your Collect, organize, and manage data in an all-in-one workspace. Share in one click for seamless collaboration. Try JotForm Tables for free.
SheetHub - SheetHub turns your spreadsheets (either Google Sheets or Excel Online) into a REST-ful JSON API.