Yes, both Squarespace and VWO Engage offer a Free Trial.
Squarespace is designed for Medium Business and Small Business.
VWO Engage is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Squarespace Starts at $12/Month when Billed Yearly whereas for VWO Engage Starts at $99/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 VWO Engage includes OneSignal, PushBots, PushAlert, Push.World, PushPro, TITANPush, Notificare, PushNinja, SmartPush and Notificationpro.