BuiltWith - Find out the technology behind websites
Screenshot Machine - Screenshot machine is an online website capturing service. Creates a screenshot or thumbnail of any online web page in couple of seconds for free.
Kompyte - Track & analyze competitors in real time.
Capture by Techulus - The ultimate toolkit for converting HTML to image & PDF. Pay only for what you need.No Subscription.
Competera - Competera is a price tracking tool for performance-oriented eCommerce retail and brands of all sizes worldwide.
Urlbox.io - Screenshot full page websites in retina resolution with Urlbox.io screenshot as a service API. Urlbox is the best provider of automated website screenshots offering many unique options and features.