Yes, both AMZ.One and SellerApp offer a Free Trial.
AMZ.One is designed for Large Enterprises, Medium Business and Small Business.
SellerApp is designed for Large Enterprises, Medium Business and Small Business.
Pricing for AMZ.One Starts at $15/Month when Billed Yearly whereas for SellerApp Starts at $39/Month when Billed Yearly.
Some top alternatives to AMZ.One includes Jungle Scout, RankActive, Outrankio, Sellics, K-meta Tool, Ranktracker, AMZ Alert, AMZInsight, AMZRank and Semrush E-Commerce Apps (Sellzone).
Some top alternatives to SellerApp includes Jungle Scout, CommerceIQ, Marketplace Manager, AMZScout, FOSHO AFF, AMZInsight, Helium 10, Omnyfy, Optiseller and OneMarket Insights.