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.

3300
Servers
694
K
CPU cores
5
PB
RAM
33
PB
HDD
442
PB
SSD

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

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
10
M
New pages
Every 24 hours, we update metrics for
300
M
Pages

Total content index size

15.0B

Pages


Keyword index

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

216
Locations

Total keyword index size

12.0B

Filtered keywords

74.0B

Keywords ever seen

1.1BUnited States
451MUnited Kingdom
400MIndia
293MRussian Federation
287MCanada
284MGermany
254MBrazil
224MJapan
218MFrance
207MAustralia
189MIndonesia
173MPhilippines
171MSpain
167MMexico
155MItaly
154MTurkey
139MNetherlands
136MVietnam
126MPoland
123MKorea
119MUkraine
116MArgentina
110MMalaysia
99MTaiwan
98MColombia
90MThailand
88MPakistan
83MSouth Africa
81MSwitzerland
80MBelgium
79MEgypt
77MSingapore
77MIran
74MSweden
73MPeru
69MChile
68MAustria
67MUnited Arab Emirates
64MSaudi Arabia
62MBangladesh
60MIreland
57MRomania
54MNew Zealand
54MPortugal
50MHong Kong
48MMorocco
48MNorway
47MCzech Republic

1.1BUnited States
451MUnited Kingdom
400MIndia
293MRussian Federation
287MCanada
284MGermany
254MBrazil
224MJapan
218MFrance
207MAustralia
189MIndonesia
173MPhilippines
171MSpain
167MMexico
155MItaly
154MTurkey
139MNetherlands
136MVietnam
126MPoland
123MKorea
119MUkraine
116MArgentina
110MMalaysia
99MTaiwan
98MColombia
90MThailand
88MPakistan
83MSouth Africa
81MSwitzerland
80MBelgium
79MEgypt
77MSingapore

1.1BUnited States
451MUnited Kingdom
400MIndia
293MRussian Federation
287MCanada
284MGermany
254MBrazil
224MJapan
218MFrance
207MAustralia
189MIndonesia
173MPhilippines
171MSpain
167MMexico
155MItaly
154MTurkey


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
521
M
Keywords
135MUnited States
28MIndia
24MJapan
22MUnited Kingdom
21MGermany
21MFrance
19MBrazil
17MCanada
16MSpain
16MRussian Federation
14MAustralia
13MItaly
12MIndonesia
11MNetherlands
11MMexico
9.9MTurkey
9.2MPoland
6.3MThailand
5.8MPhilippines
5.6MVietnam
5.5MColombia
5.3MArgentina
4.7MUkraine
4.5MSweden
3.8MTaiwan
3.0MMalaysia
2.8MChile
2.8MDenmark
2.7MSouth Africa
2.6MNorway
2.5MAustria
2.5MSaudi Arabia
2.4MPeru
2.3MPakistan
2.3MEgypt
2.3MCzech Republic
2.2MBelgium
2.1MNew Zealand
2.0MKorea
1.9MUnited Arab Emirates
1.9MFinland
1.9MRomania
1.9MGreece
1.9MPortugal
1.8MHungary
1.8MSwitzerland
1.8MHong Kong
1.8MSingapore

135MUnited States
28MIndia
24MJapan
22MUnited Kingdom
21MGermany
21MFrance
19MBrazil
17MCanada
16MSpain
16MRussian Federation
14MAustralia
13MItaly
12MIndonesia
11MNetherlands
11MMexico
9.9MTurkey
9.2MPoland
6.3MThailand
5.8MPhilippines
5.6MVietnam
5.5MColombia
5.3MArgentina
4.7MUkraine
4.5MSweden
3.8MTaiwan
3.0MMalaysia
2.8MChile
2.8MDenmark
2.7MSouth Africa
2.6MNorway
2.5MAustria
2.5MSaudi Arabia

135MUnited States
28MIndia
24MJapan
22MUnited Kingdom
21MGermany
21MFrance
19MBrazil
17MCanada
16MSpain
16MRussian Federation
14MAustralia
13MItaly
12MIndonesia
11MNetherlands
11MMexico
9.9MTurkey


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
338.5
B
Domains (post-vetting)
208.9
M
Internal backlinks
23.1
T

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