Yes, both LetConvert and Proof offer a Free Trial.
LetConvert is designed for Large Enterprises, Medium Business and Small Business.
Proof is designed for Medium Business and Small Business.
Pricing for LetConvert Starts at $5.99 whereas for Proof Starts at $26/Month when Billed Yearly.
Some top alternatives to LetConvert includes Fomo, Proof, RocketProof, Conversion Plus, Super Social Proof, Sooproof, Social Proofy, Proof Pulse, Proofly and SocialProof.
Some top alternatives to Proof includes and undefined.