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.

7000
Servers
M
CPU cores
9
PB
RAM
59
PB
HDD
1
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

17.1B

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

2.3BUnited States
1.5BBrazil
1.3BUnited Kingdom
1.2BIndia
1.1BGermany
1.0BFrance
990MCanada
839MRussian Federation
809MSpain
799MIndonesia
765MItaly
761MJapan
753MMexico
715MAustralia
709MVietnam
688MPhilippines
662MPoland
662MTurkey
622MNetherlands
608MArgentina
571MKorea
543MUkraine
543MMalaysia
510MThailand
504MColombia
457MPakistan
456MTaiwan
429MSingapore
418MEgypt
417MSouth Africa
407MSweden
396MUnited Arab Emirates
393MBelgium
386MSwitzerland
362MBangladesh
355MPeru
355MSaudi Arabia
349MChile
336MRomania
335MIreland
325MIran
310MCzech Republic
310MPortugal
307MAustria
304MMorocco
290MAlgeria
285MHong Kong
280MGreece

2.3BUnited States
1.5BBrazil
1.3BUnited Kingdom
1.2BIndia
1.1BGermany
1.0BFrance
990MCanada
839MRussian Federation
809MSpain
799MIndonesia
765MItaly
761MJapan
753MMexico
715MAustralia
709MVietnam
688MPhilippines
662MPoland
662MTurkey
622MNetherlands
608MArgentina
571MKorea
543MUkraine
543MMalaysia
510MThailand
504MColombia
457MPakistan
456MTaiwan
429MSingapore
418MEgypt
417MSouth Africa
407MSweden
396MUnited Arab Emirates

2.3BUnited States
1.5BBrazil
1.3BUnited Kingdom
1.2BIndia
1.1BGermany
1.0BFrance
990MCanada
839MRussian Federation
809MSpain
799MIndonesia
765MItaly
761MJapan
753MMexico
715MAustralia
709MVietnam
688MPhilippines


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
154MUnited States
31MIndia
24MUnited Kingdom
23MFrance
23MJapan
22MBrazil
21MGermany
19MCanada
18MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey
9.3MPoland
6.7MColombia
6.6MPhilippines
6.5MArgentina
5.9MThailand
5.6MVietnam
4.7MUkraine
4.6MSweden
3.5MTaiwan
3.4MMalaysia
3.3MChile
3.1MSouth Africa
3.0MDenmark
3.0MNorway
2.9MPeru
2.7MSaudi Arabia
2.7MPakistan
2.7MAustria
2.7MEgypt
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

154MUnited States
31MIndia
24MUnited Kingdom
23MFrance
23MJapan
22MBrazil
21MGermany
19MCanada
18MSpain
17MRussian Federation
16MAustralia
15MItaly
13MMexico
12MNetherlands
12MIndonesia
11MTurkey
9.3MPoland
6.7MColombia
6.6MPhilippines
6.5MArgentina
5.9MThailand
5.6MVietnam
4.7MUkraine
4.6MSweden
3.5MTaiwan
3.4MMalaysia
3.3MChile
3.1MSouth Africa
3.0MDenmark
3.0MNorway
2.9MPeru
2.7MSaudi Arabia

154MUnited States
31MIndia
24MUnited Kingdom
23MFrance
23MJapan
22MBrazil
21MGermany
19MCanada
18MSpain
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
492.7
B
Domains (post-vetting)
500.4
M
Internal backlinks
28.9
T