// Marketing and search-ranking tools
The painted mark for Ahrefs
Placeholder: mark still to be painted

Ahrefs

AhrefsBot

Ahrefs, based in Singapore, sells tools for studying links and search rankings, built on its own huge crawl of the web.

Worth knowing: Ahrefs says AhrefsBot is one of the busiest crawlers on the web after Googlebot, and it has used its index to start its own search engine, Yep.

Why? They map which sites link to which and how pages rank, and sell that map to marketers and agencies trying to climb the search results.