SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Site Rank Data - View historical rank information of websites via time series charts.
RanksPro.io - All-in-One Cloud SEO Software: Tailored for SEOs, Agencies, and Web Professionals.
Quantcast - Quantcast Corporation is a digital marketing company that provides free audience demographics measurement and delivers real-time advertising.
Website Informer - Website.informer: complete data lookup & free aggregated report on any domain including whois, visitors, IP & DNS details, competitors, owners, etc
LiveIntent - LiveIntent is a web platform that offers effective e-mail advertising services for marketers and publishers.