Yes, both Unbounce and Proof offer a Free Trial.
Unbounce is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Proof is designed for Medium Business and Small Business.
Pricing for Unbounce Starts at $81/Month when Billed Yearly whereas for Proof Starts at $26/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 Proof includes and undefined.