Terms

You may read, quote and link to any page. The Crawler Index and block-rate datasets on the data page are published under CC BY 4.0; credit them with the cite-this line shown with each dataset: the masthead, the title, the edition date and the URL.

The information is published as read on the dates shown on each page. Operators and vendors change their documents, so check the linked source before you rely on a row. Quoted operator statements belong to their authors and keep their source link.

Do not present this site's grades or rankings as the vendors' own. Links to other sites are references, and we do not control those sites.

We may change a page or a dataset to correct it or to bring it up to date; corrections are logged on the corrections page.