Yes, both Unbounce and ProveSource offer a Free Trial.
Unbounce is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
ProveSource is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Unbounce Starts at $81/Month when Billed Yearly whereas for ProveSource Starts at $18/Month when Billed Yearly.
Some top alternatives to Unbounce includes Instapage, Lander, Leadpages, Landingi, RallyMind, Swipe Pages, LanderLab and Shogun Page Builder.
Some top alternatives to ProveSource includes Fomo, Proof, JustProof, Conversion Plus, Super Social Proof, Sooproof, Social Proofy, Trustpulse, Proofly and Prooven.io.