Yes, both Google Sites and Unbounce offer a Free Trial.
Google Sites is designed for Large Enterprises, Medium Business and Small Business.
Unbounce is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Unbounce begins at $81/Month when Billed Yearly, while pricing details for Google Sites are unavailable.
Some top alternatives to Google Sites includes Unbounce, VWO Deploy, WordPress, PageCloud, Wix, Weebly, Squarespace, Envato Sites, 10Web, WebsiteBuilder, Format, WeWeb, GoDaddy Website Builder, Microsoft Sway and Web.com.
Some top alternatives to Unbounce includes Instapage, Lander, Leadpages, Landingi, RallyMind, Swipe Pages, LanderLab and Shogun Page Builder.
