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.

2907 Servers

331K 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.

508 million keywords. 189 countries

148 M United States
31 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 Mexico
10 M Spain
9.2 M Poland
9.1 M Russian Federation
6.9 M Thailand
6.8 M Vietnam
6.6 M Netherlands
6 M Philippines
5.3 M Ukraine
5 M Argentina
4.5 M Colombia
3.9 M Sweden
3.4 M Taiwan
3.3 M Malaysia
3 M South Africa
2.9 M Chile
2.8 M Saudi Arabia
2.6 M Peru
2.6 M Egypt
2.5 M Belgium
2.5 M Pakistan
2.2 M Denmark
2.2 M Austria
2.1 M Greece
2.1 M Romania
2 M Czechia
1.9 M Singapore
1.9 M Switzerland
1.9 M Israel
1.8 M Korea
1.8 M Hungary
1.6 M Finland
1.6 M Hong Kong
1.6 M Nigeria
1.6 M Portugal
1.6 M Norway
1.5 M Ireland
1.4 M United Arab Emirates
1.4 M New Zealand
1.3 M Bangladesh
1.2 M Ecuador
1.1 M Venezuela
1.1 M Algeria
969 K Morocco
966 K Kazakhstan
941 K Slovakia
900 K Bulgaria
841 K Serbia
700 K Croatia
690 K Belarus
679 K Kenya
650 K Sri Lanka
631 K Iraq
584 K Guatemala
564 K Bolivia
526 K Dominican Republic
484 K Lithuania
483 K Nepal
473 K Costa Rica
420 K Uruguay
412 K Jordan
407 K Ghana
406 K Tunisia
349 K Panama
334 K Azerbaijan
325 K Paraguay
321 K Kuwait
316 K Slovenia
302 K Uzbekistan
301 K Puerto Rico
274 K Honduras
273 K El Salvador
249 K Bosnia & Herzegovina
246 K Qatar
245 K Lebanon
228 K Estonia
228 K Latvia
220 K Oman
206 K Georgia
203 K Tanzania
185 K Uganda
180 K Moldova
173 K Kyrgyzstan
167 K China
166 K Nicaragua
165 K Cyprus
158 K Myanmar
156 K Jamaica
153 K Côte d'Ivoire
138 K Zambia
138 K Libya
137 K Armenia
136 K Cambodia
133 K Cameroon
130 K Ethiopia
129 K Bahrain
128 K Senegal
125 K Palestinian Territory
122 K Trinidad And Tobago
121 K Congo, Democratic Republic
118 K North Macedonia
112 K Albania
103 K Luxembourg
96 K Zimbabwe
95 K Mauritius
91 K Malta
89 K Angola
79 K Mozambique
72 K Mongolia
66 K Montenegro
63 K Laos
61 K Turkmenistan
60 K Haiti
59 K Iceland
57 K Afghanistan
52 K Namibia
49 K Cuba
46 K Guadeloupe
45 K Burkina Faso
45 K Tajikistan
42 K Mali
42 K Brunei Darussalam
40 K Benin
39 K Somalia
38 K Madagascar
38 K Botswana
37 K Maldives
33 K Rwanda
29 K Bahamas
28 K Guyana
28 K Fiji
27 K Gabon
25 K Togo
23 K Suriname
22 K Papua New Guinea
20 K Bhutan
20 K Malawi
18 K Belize
17 K Gibraltar
16 K Congo
16 K Niger
16 K Sierra Leone
13 K Lesotho
10 K Jersey
8.7 K Cape Verde
8.2 K Isle Of Man
8.1 K Chad
7.9 K Andorra
7 K Gambia
6.9 K Virgin Islands, U.S.
5.7 K Antigua And Barbuda
5.6 K Timor-Leste
5.3 K Saint Vincent And Grenadines
4.8 K Guernsey
4.6 K Seychelles
4.4 K Burundi
3.9 K Djibouti
2.8 K Central African Republic
2.8 K Greenland
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
501 Solomon Islands
433 American Samoa
418 Vanuatu
399 Samoa
287 Anguilla
211 Tonga
176 Cook Islands
166 Micronesia, Federated States Of
110 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