Yes, both Proof and JustProof offer a Free Trial.
Proof is designed for Medium Business and Small Business.
JustProof is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Proof Starts at $26/Month when Billed Yearly whereas for JustProof Starts at $7.99/Month.
Some top alternatives to Proof includes and undefined.
Some top alternatives to JustProof includes Fomo, Proof, SuperProof, Conversion Plus, Super Social Proof, Sooproof, Social Proofy, Proofly, SocialProof and Prooven.io.