ExcelEverywhere and SpreadsheetConverter are the same programs, so a license key for SpreadsheetConverter works for ExcelEverywhere and vice versa. Converts an Excel spreadsheet into an ASP or ASP.NET-page. The web page looks like the spreadsheet and calculates like the original spreadsheet.

The price of SpreadsheetConverter is per developer, i.e. you need
one license per computer where SpreadsheetConverter is installed.
There are no additional costs; there are no royalties to pay when you
publish the resulting web pages on your web server.