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.

4300
Servers
661
K
CPU cores
4
PB
RAM
33
PB
HDD
477
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 3rd 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

BingBot

Microsoft

Search Engine Crawler

3

DataDog Synthetic Bot

DataDog

Monitoring & Analytics

4

AhrefsBot

Ahrefs

Search Engine Optimization

5

Qualys

Qualys

Search Engine Crawler

6

YandexBot

Yandex

Search Engine Crawler

7

PetalBot

Huawei

Search Engine Crawler

8

Google AdsBot

Google

SAdvertising & Marketing

9

Google Image Proxy

Google

Page Preview

10

Google Images

Google

Search Engine Crawler

Bots ranked by number of requests. Data supplied as of April, 2023


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

16.0B

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
1.2BBrazil
1.0BUnited Kingdom
1.0BIndia
879MGermany
848MFrance
779MCanada
659MRussian Federation
631MSpain
627MIndonesia
590MMexico
589MJapan
584MItaly
557MAustralia
536MPhilippines
528MVietnam
526MPoland
495MTurkey
472MArgentina
453MNetherlands
411MKorea
405MUkraine
404MMalaysia
391MColombia
371MThailand
332MTaiwan
330MPakistan
299MSouth Africa
290MEgypt
288MSingapore
286MSweden
284MBelgium
276MUnited Arab Emirates
272MSwitzerland
262MPeru
260MChile
250MBangladesh
240MSaudi Arabia
235MRomania
230MIran
227MIreland
222MCzech Republic
215MAustria
213MPortugal
206MMorocco
201MAlgeria
196MHong Kong
195MGreece

2.0BUnited States
1.2BBrazil
1.0BUnited Kingdom
1.0BIndia
879MGermany
848MFrance
779MCanada
659MRussian Federation
631MSpain
627MIndonesia
590MMexico
589MJapan
584MItaly
557MAustralia
536MPhilippines
528MVietnam
526MPoland
495MTurkey
472MArgentina
453MNetherlands
411MKorea
405MUkraine
404MMalaysia
391MColombia
371MThailand
332MTaiwan
330MPakistan
299MSouth Africa
290MEgypt
288MSingapore
286MSweden
284MBelgium

2.0BUnited States
1.2BBrazil
1.0BUnited Kingdom
1.0BIndia
879MGermany
848MFrance
779MCanada
659MRussian Federation
631MSpain
627MIndonesia
590MMexico
589MJapan
584MItaly
557MAustralia
536MPhilippines
528MVietnam


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
158MUnited States
31MIndia
26MJapan
24MFrance
24MUnited Kingdom
22MBrazil
22MGermany
19MCanada
19MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey
9.4MPoland
6.9MThailand
6.8MColombia
6.6MPhilippines
6.5MArgentina
5.7MVietnam
4.7MUkraine
4.7MSweden
3.8MTaiwan
3.5MMalaysia
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
2.5MKorea
2.4MBelgium
2.2MUnited Arab Emirates
2.1MPortugal
2.0MRomania
1.9MFinland
1.9MHungary
1.9MSingapore
1.9MSwitzerland
1.9MGreece
1.8MHong Kong

158MUnited States
31MIndia
26MJapan
24MFrance
24MUnited Kingdom
22MBrazil
22MGermany
19MCanada
19MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey
9.4MPoland
6.9MThailand
6.8MColombia
6.6MPhilippines
6.5MArgentina
5.7MVietnam
4.7MUkraine
4.7MSweden
3.8MTaiwan
3.5MMalaysia
3.3MChile
3.1MSouth Africa
3.0MDenmark
3.0MNorway
2.9MPeru
2.7MSaudi Arabia

158MUnited States
31MIndia
26MJapan
24MFrance
24MUnited Kingdom
22MBrazil
22MGermany
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
360.6
B
Domains (post-vetting)
212
M
Internal backlinks
23.7
T