Yes, both Microsoft Excel and Microsoft Power BI offer a Free Trial.
Microsoft Excel is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Microsoft Power BI is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Microsoft Excel Starts at $5 whereas for Microsoft Power BI Starts at $4,995/Month.
Some top alternatives to Microsoft Excel includes SpreadsheetWEB, Apple Numbers, Zoho Sheet, Google Sheets, Retable, Rows, LibreOffice, iWork and Sheet2APi.
Some top alternatives to Microsoft Power BI includes Google Drive, Tableau, IBM Cognos Analytics, Dundas BI, SAS Business Intelligence, Clear Analytics, SAP BusinessObjects BI, ibi Analytics Platform, Narrative BI and Microsoft Power BI Desktop.