Yes, both ProtoPie and Framer X offer a Free Trial.
ProtoPie is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Framer X is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for ProtoPie Starts at $11/Month when Billed Yearly whereas for Framer X Starts at $27/User/Month when Billed Yearly.
Some top alternatives to ProtoPie includes Miro, Adobe XD, UX-App, Balsamiq, Axure RP, Wireframe.cc, Claritee, Stage, Framer X, Zen Wireframe and Proto.io.
Some top alternatives to Framer X includes Looka, InVision, Justinmind, Figma, HotGloo, Axure RP, Mockplus, Inspireframe, Previewed and Marvel.