Nike
Yes, both SyncSketch and ProofHub offer a Free Trial.
SyncSketch is designed for Large Enterprises, Medium Business and Small Business.
ProofHub is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for SyncSketch Starts at $6.80/Month when Billed Yearly whereas for ProofHub Starts at $79/user/month when yearly.
Some top alternatives to SyncSketch includes Ziflow, ProofCafe, QuickReviewer, ReviewStudio, Workgroups DaVinci Proof, Filestage, WebProof, Coment, MediaMarkup and Proofing.
Some top alternatives to ProofHub includes Quickbase , Smartsheet, ClickUp, Zoho Projects, Jira, Basecamp, Trello, Wrike, TeamGantt, monday.com, Asana, Teamwork, ProjectManager.com, Trackboard, Quick Base and Project Insight.