Yes, both Overleaf and Microsoft Word offer a Free Trial.
Overleaf is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Microsoft Word is designed for Individuals, Large Enterprises, Medium Business and Small Business.
Pricing for Overleaf Starts at $15/Month whereas for Microsoft Word Starts at $5/User/Month when Billed Yearly.
Some top alternatives to Overleaf includes Manuscripts, Etherpad, PleaseReview, Documint, Microsoft Word, Google Docs, pdfFiller, ReactiveDoc, LiveDocs, Slick and SciSpace (formerly Typeset).
Some top alternatives to Microsoft Word includes Documint, Google Docs, pdfFiller, Documate, LiveDocs, LibreOffice, Microsoft PowerPoint, Storydoc, SoftMaker Office, WPS Office and WordPerfect Office.