Neither Shortly nor ProWritingAid offers a free trial.
Shortly is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ProWritingAid is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Shortly Starts at $65/Month when Billed Yearly whereas for ProWritingAid Starts at $20/Month.
Some top alternatives to Shortly includes ProWritingAid, Linguix, WritingAssistant, Conversion.ai, Copy.ai, Contentbot.ai, RytersBlock, PerfectEssayWriter.ai and BloggerAI.
Some top alternatives to ProWritingAid includes Gramara, WritingAssistant, Writer, Essaybot, QuillBot, Ginger and PaperRater.