We’re powered by seriously big data
Ahrefs collects, processes, and stores large amounts of data for search marketing professionals.
Similar to search engines, we crawl the entire web 24/7 and store petabytes (1PB = 1000TB) of information about live websites — like how they link to each other and what keywords they rank for in search results.
Infrastructure built
for scale
Since no existing solution could keep up with the volume of data we operate, most of our software infrastructure was built in-house.
Meet Yep1, our superfast supercomputer
Yep1, Ahrefs’ supercomputer, ranks among the Top 50 fastest supercomputers worldwide by Flops (floating point operations per second).
Data supplied as of May, 2024. See full report
Types of data available in Ahrefs
Backlink index
The world’s largest index of live backlinks, updated with fresh data every 15–30 minutes. This index powers backlink data in Site Explorer, and is used to calculate our proprietary metrics: Ahrefs Rank, Domain Rating and URL Rating.
every minute
35T
Keyword index
This powers Keywords Explorer, our keyword research tool for finding what your prospective customers are searching for online.
29B
110B
Content index
Our content index powers Content Explorer, which is basically a content search engine.
every 24 hours
every 24 hours
23B
Organic search traffic index
Our database of search queries and the amount of search traffic they send to top-ranking pages. It powers search traffic estimations in Site Explorer.
Paid search traffic index
Our Google Ads (PPC) database powers all the paid reports in Site Explorer.
7B
Paid data is aggregated at the country level (not city or ZIP) for consistency in trend analysis.
AI visibility index
This powers Brand Radar, Ahrefs’ AI visibility tool. As well as our entities index in Site Explorer.
517M