Ahrefs is an all-in-one SEO toolset for growing search traffic and optimizing websites.
We crawl the entire web, collect and process petabytes of data every day, then give this information context and make it accessible via a simple user interface.
Our crawler processes up to 8 billion pages a day, and we update our index with the freshest backlinks on the web every few minutes. Fun fact: AhrefsBot is actually the 3rd most active crawler on the web.