Grammarly Business offers Free Trial, but Copyscape does not.
Grammarly Business is designed for Large Enterprises, Medium Business and Small Business.
Copyscape is designed for Medium Business and Small Business.
Pricing for Grammarly Business Starts at $12.50/User/Month when Billed Yearly whereas for Copyscape Starts at $4.95/Month.
Some top alternatives to Grammarly Business includes ProWritingAid, Linguix, WritingAssistant, Writer, PlagiarismSearch Checker, Ginger, Handywriter and PaperRater.
Some top alternatives to Copyscape includes Unicheck, Plagramme, Plagly, PlagiarismCheck.org, Free Plagiarism Checker, Plagiarism Checker X, Plagscan, Quetext, iThenticate and PlagiarismSearch Checker.