Yes, both Proof and Conversion Plus offer a Free Trial.
Proof is designed for Medium Business and Small Business.
Conversion Plus is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Proof Starts at $26/Month when Billed Yearly whereas for Conversion Plus Starts at $8.33/Month when Billed Yearly.
Some top alternatives to Proof includes and undefined.
Some top alternatives to Conversion Plus includes Proof, ProveSource, SuperProof, JustProof, Super Social Proof, Sooproof, Social Proofy, Proofly, SocialProof and Prooven.io.