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.

We're also really proud of our backend infrastructure. Since no existing solution could keep up with the volume of data we operate, most of our software infrastructure was built in-house.

4200
Servers
658
K
CPU cores
4
PB
RAM
32
PB
HDD
473
PB
SSD

$900
M
The amount we’d have to spend on the cloud in 3 years without our own infrastructure.
Watch reel

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

23.32
PFlops

Most active web crawler in the SEO industry

AhrefsBot is the most active web crawler in the “Search Engine Optimization” category on Cloudflare Radar. It’s also the 2nd most active web crawler in the world.

Every minute, we crawl
5
M
Pages
There are
170
T
Rows in our key-value database
/

Rank

Bot

Owner

Category

1

GoogleBot

Google

Search Engine Crawler

2

AhrefsBot

Ahrefs

Search Engine Optimization

3

Qualys

Qualys

Security

4

BingBot

Microsoft

Search Engine Crawler

5

Amazonbot

Amazon

AI Search

Bots ranked by number of requests. Data supplied as of December, 2024


Content index

Our content index powers Content Explorer, which is basically a content search engine.

Every 24 hours, we discover
1
M
New pages
Every 24 hours, we update metrics for
1
M
Pages

Total content index size

16.3B

Pages


Keyword index

This powers Keywords Explorer, our keyword research tool for finding what your prospective customers are searching for online.

217
Locations

Total keyword index size

28.7B

Filtered keywords

110B

Keywords ever seen

2.0BUnited States
1.3BBrazil
1.1BUnited Kingdom
1.0BIndia
916MGermany
875MFrance
805MCanada
683MRussian Federation
654MSpain
645MIndonesia
613MJapan
607MItaly
606MMexico
575MAustralia
549MPhilippines
546MVietnam
543MPoland
515MTurkey
483MArgentina
474MNetherlands
428MKorea
420MUkraine
417MMalaysia
399MColombia
384MThailand
344MTaiwan
341MPakistan
310MSouth Africa
309MSingapore
303MEgypt
301MSweden
296MBelgium
287MUnited Arab Emirates
286MSwitzerland
270MPeru
268MChile
260MBangladesh
252MSaudi Arabia
246MRomania
238MIreland
238MIran
230MCzech Republic
226MAustria
223MPortugal
214MMorocco
207MAlgeria
204MHong Kong
204MGreece

2.0BUnited States
1.3BBrazil
1.1BUnited Kingdom
1.0BIndia
916MGermany
875MFrance
805MCanada
683MRussian Federation
654MSpain
645MIndonesia
613MJapan
607MItaly
606MMexico
575MAustralia
549MPhilippines
546MVietnam
543MPoland
515MTurkey
483MArgentina
474MNetherlands
428MKorea
420MUkraine
417MMalaysia
399MColombia
384MThailand
344MTaiwan
341MPakistan
310MSouth Africa
309MSingapore
303MEgypt
301MSweden
296MBelgium

2.0BUnited States
1.3BBrazil
1.1BUnited Kingdom
1.0BIndia
916MGermany
875MFrance
805MCanada
683MRussian Federation
654MSpain
645MIndonesia
613MJapan
607MItaly
606MMexico
575MAustralia
549MPhilippines
546MVietnam


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.

189
Locations
1
M
Keywords
156MUnited States
31MIndia
24MFrance
24MUnited Kingdom
23MJapan
22MBrazil
21MGermany
19MCanada
19MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey
9.4MPoland
6.8MColombia
6.6MPhilippines
6.5MArgentina
5.9MThailand
5.7MVietnam
4.7MUkraine
4.7MSweden
3.5MTaiwan
3.4MMalaysia
3.3MChile
3.1MSouth Africa
3.0MDenmark
3.0MNorway
2.9MPeru
2.7MSaudi Arabia
2.7MPakistan
2.7MEgypt
2.7MAustria
2.5MCzech Republic
2.5MNew Zealand
2.4MKorea
2.3MBelgium
2.2MUnited Arab Emirates
2.1MPortugal
2.0MRomania
1.9MFinland
1.9MHungary
1.9MSingapore
1.9MSwitzerland
1.9MGreece
1.7MHong Kong

156MUnited States
31MIndia
24MFrance
24MUnited Kingdom
23MJapan
22MBrazil
21MGermany
19MCanada
19MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey
9.4MPoland
6.8MColombia
6.6MPhilippines
6.5MArgentina
5.9MThailand
5.7MVietnam
4.7MUkraine
4.7MSweden
3.5MTaiwan
3.4MMalaysia
3.3MChile
3.1MSouth Africa
3.0MDenmark
3.0MNorway
2.9MPeru
2.7MSaudi Arabia

156MUnited States
31MIndia
24MFrance
24MUnited Kingdom
23MJapan
22MBrazil
21MGermany
19MCanada
19MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey


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.

External backlinks history

35.0T

Records

Pages in index
413.8
B
Domains (post-vetting)
218.2
M
Internal backlinks
26.2
T