Unbounce offers Free Trial, but SITE123 does not.
SITE123 is designed for Freelancers, Medium Business and Small Business.
Unbounce is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for SITE123 Starts at $5.80/Month whereas for Unbounce Starts at $81/Month when Billed Yearly.
Some top alternatives to SITE123 includes Unbounce, VWO Deploy, WordPress, Wix, Squarespace, Envato Sites, WebsiteBuilder, Bookmark Website Builder, Webs, Format, Website.com, SiteBuilder.com, GoDaddy Website Builder and Web.com.
Some top alternatives to Unbounce includes Instapage, Lander, Leadpages, Landingi, RallyMind, Swipe Pages, LanderLab and Shogun Page Builder.