Yes, both Instapage and ProveSource offer a Free Trial.
Instapage is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ProveSource is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Instapage Starts at $199/Month when Billed Yearly whereas for ProveSource Starts at $18/Month when Billed Yearly.
Some top alternatives to Instapage includes Unbounce, Lander, Leadpages, Landingi, LadiPage, ClickFunnels, FlyerFunnel, Optiin, LanderLab and CloudFunnels.
Some top alternatives to ProveSource includes Fomo, Proof, JustProof, Conversion Plus, Super Social Proof, Sooproof, Social Proofy, Trustpulse, Proofly and Prooven.io.