Squarespace offers Free Trial, but Leadpages does not.
Squarespace is designed for Medium Business and Small Business.
Leadpages is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Squarespace Starts at $12/Month when Billed Yearly whereas for Leadpages Starts at $5/Month when Billed Yearly.
Some top alternatives to Squarespace includes Unbounce, VWO Deploy, WordPress, SITE123, Wix, Webflow, Envato Sites, WebsiteBuilder, Bookmark Website Builder, Format, Website.com, SiteBuilder.com, Square Ecommerce, GoDaddy Website Builder and Web.com.
Some top alternatives to Leadpages includes Unbounce, Instapage, Pagewiz, Lander, Landingi, Roundclicks, Swipe Pages and Shogun Page Builder.