Yes, both Filestage and Content Central offer a Free Trial.
Filestage is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Content Central is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Filestage Starts at $19/User/Month when Billed Yearly whereas for Content Central Starts at $35/User/Month.
Some top alternatives to Filestage includes PageProof, GoProof, Ziflow, ProofCafe, QuickReviewer, Workgroups DaVinci Proof, WebProof, Coment, MediaMarkup and Proofing.
Some top alternatives to Content Central includes PandaDoc, M-Files, PaperNIC, DocuWare, CDOC, Greenbox, docMgt, EZ Doc Filer, Addmin, docEdge DMS and Docsmore.