Yes, both Frame.io and Reviewflowz offer a Free Trial.
Frame.io is designed for Medium Business and Small Business.
Reviewflowz is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Frame.io Starts at $13/User/Month when Billed Yearly whereas for Reviewflowz Starts at $4.99/Month.
Some top alternatives to Frame.io includes Ziflow, Wipster, iconik, Zoho Flow, Flowz, Qualified, Superflow, Workvivo, Dropbox Replay, Suite Studios, Reviewflowz and Nextjournal.
Some top alternatives to Reviewflowz includes Review Showcase, Revi, FreshReview, TrueReview, AppReviewBot, ReviewsCollect, ReviewRev, Qualified, Grab Your Reviews, Workvivo and IFTTT.