Yes, both Nextsale and ProveSource offer a Free Trial.
Nextsale is designed for Large Enterprises, Medium Business and Small Business.
ProveSource is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Nextsale Starts at $39/Month whereas for ProveSource Starts at $18/Month when Billed Yearly.
Some top alternatives to Nextsale includes Fomo, Proof, JustProof, Social Oracle, Super Social Proof, Sooproof, Notipack, Social Proofy, Proof Pulse and Proofly.
Some top alternatives to ProveSource includes Fomo, Proof, JustProof, Conversion Plus, Super Social Proof, Sooproof, Social Proofy, Trustpulse, Proofly and Prooven.io.