Visit Rank
Visit Rank is an instant web domain rank checker covering 385 million domains and subdomains, that have been discovered by crawling and analyzing 3 billion web pages (kudos to the fantastic Common Crawl team). Visit Rank Chrome Extension - automatically displays closely approximated rank for every website you visit without clicking. Exact rank is also available - with just one click. Webfinery Visit Rank API - generous free allowance for anyone, that would like to use Visit Rank data in their own app.
