Squarespace offers Free Trial, but ThunderGrowth does not.
Squarespace is designed for Medium Business and Small Business.
ThunderGrowth is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Squarespace Starts at $12/Month when Billed Yearly whereas for ThunderGrowth Starts at $9.90/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 ThunderGrowth includes Fomo, SuperProof, Notipack, Social Proofy, eNotify, Notificationpro, Proofly, SocialProof, Acalytica Social Proof and OptinBox.