Ahrefs by the numbers

The Ahrefs team takes great pride in collecting, processing and storing large amounts of data for search marketing professionals.

We crawl the entire web 24/7 (much like search engines do) storing petabytes of information about live websites — how they link to each other and what keywords they rank for in search results.

We process large amounts of clickstream data to maintain the world's largest third-party database of search queries, with estimated monthly search volume and advanced keyword research metrics.

We're proud of our backend infrastructure. All existing solutions couldn't keep up with the volume of data that we operate, so we had to custom build the larger part of our software infrastructure in-house.

2906 Servers

332K CPU cores
2.4PB RAM
51PB HDD
210PB SSD

Content index

Our content index is basically a mini search engine. You can search for any word and we'll return all the pages mentioning that word with our useful SEO metrics attached to them.

Every 24 hours we discover

30 million new pages
Every 24 hours we update metrics for

420 million pages
Total content index size

10 billion pages

Search traffic index

Search Traffic index is a database of search queries that we use to approximate the search traffic that any website or URL has, and show you the actual keywords that it ranks for.

500 million keywords. 189 countries

148 M United States
30 M India
28 M Japan
22 M United Kingdom
19 M Germany
15 M France
14 M Indonesia
13 M Canada
13 M Australia
12 M Turkey
12 M Italy
12 M Brazil
10 M Spain
10 M Mexico
9.2 M Poland
9.1 M Russian Federation
6.8 M Vietnam
6.7 M Thailand
6.6 M Netherlands
5.5 M Philippines
5.2 M Ukraine
4.9 M Argentina
4.2 M Colombia
3.7 M Sweden
3.4 M Taiwan
3.1 M Malaysia
2.7 M South Africa
2.7 M Chile
2.7 M Saudi Arabia
2.5 M Egypt
2.4 M Belgium
2.4 M Peru
2.3 M Pakistan
2.1 M Denmark
2.1 M Austria
2 M Greece
2 M Romania
1.9 M Czechia
1.8 M Israel
1.8 M Switzerland
1.8 M Korea
1.8 M Singapore
1.7 M Hungary
1.6 M Hong Kong
1.6 M Finland
1.5 M Norway
1.5 M Portugal
1.4 M Nigeria
1.4 M United Arab Emirates
1.3 M Ireland
1.3 M New Zealand
1.2 M Bangladesh
1.1 M Ecuador
1.1 M Venezuela
1 M Algeria
933 K Kazakhstan
927 K Morocco
899 K Slovakia
889 K Bulgaria
809 K Serbia
675 K Croatia
667 K Belarus
625 K Kenya
603 K Sri Lanka
593 K Iraq
551 K Bolivia
524 K Guatemala
489 K Dominican Republic
463 K Lithuania
436 K Nepal
434 K Costa Rica
393 K Uruguay
389 K Jordan
389 K Tunisia
373 K Ghana
330 K Azerbaijan
316 K Panama
306 K Slovenia
301 K Kuwait
300 K Paraguay
287 K Uzbekistan
281 K Puerto Rico
251 K El Salvador
248 K Honduras
246 K Bosnia & Herzegovina
229 K Lebanon
228 K Qatar
221 K Estonia
220 K Latvia
206 K Oman
197 K Georgia
190 K Tanzania
175 K Moldova
170 K Uganda
167 K Kyrgyzstan
157 K China
157 K Cyprus
151 K Nicaragua
148 K Myanmar
148 K Jamaica
146 K Côte d'Ivoire
134 K Armenia
129 K Zambia
129 K Libya
127 K Cambodia
127 K Bahrain
126 K Cameroon
122 K Senegal
120 K Palestinian Territory
120 K Ethiopia
117 K Trinidad And Tobago
114 K North Macedonia
110 K Congo, Democratic Republic
109 K Albania
99 K Luxembourg
90 K Zimbabwe
90 K Mauritius
86 K Angola
85 K Malta
75 K Mozambique
69 K Mongolia
63 K Montenegro
61 K Laos
58 K Turkmenistan
57 K Haiti
57 K Iceland
56 K Afghanistan
49 K Namibia
45 K Cuba
45 K Guadeloupe
44 K Burkina Faso
43 K Tajikistan
41 K Brunei Darussalam
40 K Mali
39 K Benin
36 K Somalia
36 K Madagascar
36 K Botswana
35 K Maldives
31 K Rwanda
28 K Bahamas
27 K Guyana
27 K Fiji
26 K Gabon
24 K Togo
22 K Suriname
21 K Papua New Guinea
19 K Bhutan
19 K Malawi
18 K Belize
17 K Gibraltar
16 K Congo
16 K Niger
15 K Sierra Leone
12 K Lesotho
9.8 K Jersey
8.5 K Cape Verde
7.8 K Chad
7.8 K Isle Of Man
7.8 K Andorra
6.8 K Gambia
6.8 K Virgin Islands, U.S.
5.5 K Antigua And Barbuda
5.4 K Timor-Leste
5.3 K Saint Vincent And Grenadines
4.7 K Guernsey
4.5 K Seychelles
4.4 K Burundi
3.9 K Djibouti
2.7 K Greenland
2.7 K Central African Republic
2.4 K Liechtenstein
1.9 K Virgin Islands, British
1.8 K San Marino
1.6 K Dominica
1.4 K Sao Tome And Principe
483 Solomon Islands
423 American Samoa
412 Vanuatu
372 Samoa
278 Anguilla
205 Tonga
166 Cook Islands
161 Micronesia, Federated States Of
109 Kiribati
100 Nauru
39 Montserrat
23 Niue
20 Saint Helena

Backlink index

Ahrefs boasts the world's largest index of live backlinks. We update it with fresh data every 15-30 minutes. We use backlink data to calculate our proprietary metrics: Ahrefs Rank, Domain Rating and URL Rating.

Domains (post-vetting)

Pages in index

Internal backlinks

External backlinks