Statista - The Statistics Portal for Market Data, Market Research and Market Studies
Forrester Research - Forrester works with business and technology leaders to develop customer-obsessed strategies that...
SimilarWeb - SimilarWeb.com is a website analysis tool that gives you analytics information for any website.
Gartner - Gartner delivers technology research to global technology business leaders to make informed decisions on key initiatives.
IDC - The premier global market intelligence firm.
Website Ranking Checker - Website Ranking Checker (WRC) is a completely free tool for monitoring your website ranking.