Yes, both Proof and Sooproof offer a Free Trial.
Proof is designed for Medium Business and Small Business.
Sooproof is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Proof Starts at $26/Month when Billed Yearly whereas for Sooproof Starts at $0.99/Month.
Some top alternatives to Proof includes and undefined.
Some top alternatives to Sooproof includes Fomo, Proof, SuperProof, ProofSky, JustProof, Super Social Proof, Social Proofy, Proofly, Prooven.io and SocialProofed.