Yes, both ReviewStudio and Approval Studio offer a Free Trial.
ReviewStudio is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Approval Studio is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for ReviewStudio Starts at $15/Month when Billed Yearly whereas for Approval Studio Starts at $3,999/Month when Billed Yearly.
Some top alternatives to ReviewStudio includes PageProof, ProofCafe, QuickReviewer, Workgroups DaVinci Proof, Hightail, WebProof, Coment, CrossCap Online Proofing, ProofStuff and Proofing.
Some top alternatives to Approval Studio includes PageProof, ProofQuick, ProofCafe, QuickReviewer, ReviewStudio, Workgroups DaVinci Proof, Hightail, WebProof, Coment and Proofing.