Yes, both Cage and SyncSketch offer a Free Trial.
Cage is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
SyncSketch is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Cage Starts at $8/User/Month whereas for SyncSketch Starts at $6.80/Month when Billed Yearly.
Some top alternatives to Cage includes PageProof, GoProof, Ziflow, ProofCafe, QuickReviewer, Workgroups DaVinci Proof, WebProof, Coment, CrossCap Online Proofing and Proofing.
Some top alternatives to SyncSketch includes Ziflow, ProofCafe, QuickReviewer, ReviewStudio, Workgroups DaVinci Proof, Filestage, WebProof, Coment, MediaMarkup and Proofing.