Yes, both Gainsight PX and ProductPlan offer a Free Trial.
Gainsight PX is designed for Large Enterprises, Medium Business and Small Business.
ProductPlan is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Gainsight PX Starts at $500/User/Month whereas for ProductPlan Starts at $39/User/Month when Billed Yearly.
Some top alternatives to Gainsight PX includes ProdPad, Productroad, ProdCamp, ProductFlare, Productiv, Zoomph, Amplitude, Userpilot, Pendo and Amplitude Analytics.
Some top alternatives to ProductPlan includes Aha!, Roadmunk, ProdPad, Jira, productboard, Productroad, ProductFlare, Next Please, IdeaPlan and LaunchNotes.