Yes, both Squarespace and ShareSpring offer a Free Trial.
Squarespace is designed for Medium Business and Small Business.
ShareSpring is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Squarespace Starts at $12/Month when Billed Yearly whereas for ShareSpring Starts at $50/Month.
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 ShareSpring includes Crowdfire, SocialBee, Social Media Wall, Buffer, Zoho Social, Planable, Later, SocialBu, Aggreto, Broadcast, Social Mako, CloudSocial, SocialHub, Send Social Media and Posted.