What are some alternatives?
SpreadsheetWEB - SpreadsheetWEB is a no-code platform that helps businesses translate their collective Microsoft Excel expertise into robust web applications with limited or no reliance on IT resources.
Publisheet - Publish your Excel sheets to the web as dynamic web applications with formula support.
Keikai - Fastest web spreadsheet for Big Data
Excel Online - Excel Online, part of Office Online, is the online version of Microsoft Excel.
Awesome Table - Display Google spreadsheet data beautifully
Coda.io - Coda is a new type of document that blends the flexibility of documents, the power of spreadsheets, and the utility of apps into one.