What are some alternatives?
When comparing Gnumeric and Google Sheets, you can also consider the following products
Microsoft Office Excel - Microsoft Office Excel is a commercial spreadsheet application.
LibreOffice - Calc - LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
EtherCalc - EtherCalc is a web spreadsheet.
Apple Numbers - Numbers lets you build beautiful spreadsheets on a Mac, iPad, or iPhone — or on a PC using iWork for iCloud. And it’s compatible with Apple Pencil.
Apache OpenOffice Calc - Calc, part of the https://alternativeto.
Obvibase - Obvibase makes it easy to create and collaboratively edit online databases.