Yes, both Instapage and Proof offer a Free Trial.
Instapage is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Proof is designed for Medium Business and Small Business.
Pricing for Instapage Starts at $199/Month when Billed Yearly whereas for Proof Starts at $26/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 Proof includes and undefined.