ProductPlan offers Free Trial, but Zepel does not.
Zepel is designed for Medium Business and Small Business.
ProductPlan is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Zepel Starts at $5/User/Month when Billed Yearly whereas for ProductPlan Starts at $39/User/Month when Billed Yearly.
Some top alternatives to Zepel includes ProdPad, ProductPlan, Jira, productboard, Productroad, Next Please, Trello, Asana, Teamwork and Height.
Some top alternatives to ProductPlan includes Aha!, Roadmunk, ProdPad, Jira, productboard, Productroad, ProductFlare, Next Please, IdeaPlan and LaunchNotes.