Yes, both KROCK.IO and ProofCafe offer a Free Trial.
KROCK.IO is designed for Large Enterprises, Medium Business and Small Business.
ProofCafe is designed for Freelancers, Medium Business and Small Business.
Pricing for KROCK.IO Starts at $7.99/Month when Billed Yearly whereas for ProofCafe Starts at $20/Month.
Some top alternatives to KROCK.IO includes ProofHub, GoProof, ProofCafe, QuickReviewer, Workgroups DaVinci Proof, Hightail, WebProof, Collato, kriyadocs and Proofing.
Some top alternatives to ProofCafe includes PageProof, GoProof, ProofQuick, QuickReviewer, Workgroups DaVinci Proof, Hightail, WebProof, Coment, CrossCap Online Proofing and Proofing.