Yes, both CheckDuck and Screpy offer a Free Trial.
CheckDuck is designed for Large Enterprises, Medium Business and Small Business.
Screpy is designed for Large Enterprises, Medium Business and Small Business.
Pricing for CheckDuck Starts at $9.99/Month whereas for Screpy Starts at $9/Month when Billed Yearly.
Some top alternatives to CheckDuck includes Netpeak Spider, Screpy, Domain Monitor, Qualified, yesterday's Domains, Workvivo, aliveDomain, DomainWatch, Xpired, IFTTT and Domain Scout.
Some top alternatives to Screpy includes SiteGuru, SEOmonitor, Monitor Backlinks, SEO Sitecheckup, OnPage Champ, Uptime, Uptime Robot, Super Monitoring, SerpWatch and SerpMaze.