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.

2.1K Servers

65K CPU cores
369TB RAM
47PB HDD
7PB 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

1.8 million new pages
Every 24 hours we update metrics for

72 million pages
Total content index size

1.1 billion pages
Full update

Every month

Keyword index

Keyword index is a huge database of search queries (across 10 different search engines) that you can browse and research what your prospective customers are looking for online.

7.8 billion keywords. 10 search engines. 171 countries

Google

5.1B
Youtube

642.7M
Amazon

124.9M
Bing

92.2M
Yahoo

133.9M
Yandex

72.1M
Baidu

2.7M
Daum

1.5M
Naver

14.2M
Seznam

7M

7.8 billion keywords

3.3 B United States
533 M Brazil
354 M France
324 M United Kingdom
193 M Germany
187 M Spain
181 M Poland
165 M Italy
142 M Russian Federation
142 M Mexico
138 M Canada
123 M Argentina
116 M Japan
114 M India
105 M Colombia
99 M Australia
80 M Ukraine
61 M Indonesia
59 M Chile
58 M Turkey
51 M Czech Republic
50 M Venezuela
49 M Philippines
48 M Netherlands
46 M Taiwan
45 M Belgium
43 M Peru
38 M Hungary
38 M Greece
35 M Ecuador
31 M Romania
31 M Finland
28 M Pakistan
28 M Portugal
28 M Vietnam
27 M Sweden
27 M Egypt
27 M Malaysia
24 M Algeria
23 M Norway
23 M Morocco
23 M Thailand
23 M South Africa
22 M Austria
21 M Korea
21 M New Zealand
20 M Switzerland
19 M Serbia
18 M Denmark
18 M Slovakia
18 M Bulgaria
16 M Saudi Arabia
14 M Croatia
14 M Israel
14 M Hong Kong
14 M Bolivia
14 M Belarus
13 M Uruguay
13 M Ireland
12 M Singapore
12 M Tunisia
12 M Kazakhstan
11 M Dominican Republic
10 M Costa Rica
9.1 M Lithuania
8.5 M Slovenia
8.1 M Guatemala
8 M Bangladesh
8 M Sri Lanka
7.2 M United Arab Emirates
6.4 M Panama
6.4 M Bosnia & Herzegovina
6.3 M El Salvador
6.2 M Latvia
6.2 M Nigeria
5.9 M Paraguay
5.9 M Estonia
5.4 M Moldova
4.8 M Honduras
3.8 M Azerbaijan
3.7 M Kenya
3.4 M Puerto Rico
3.4 M Armenia
3.2 M Trinidad And Tobago
2.9 M Jordan
2.9 M Mauritius
2.7 M Reunion
2.7 M Macedonia
2.6 M Jamaica
2.6 M Nicaragua
2.6 M Georgia
2.4 M Iraq
2.1 M Ghana
2.1 M Palestinian Territory
1.8 M Malta
1.7 M Albania
1.7 M Lebanon
1.6 M Qatar
1.6 M Cyprus
1.6 M Nepal
1.5 M Zimbabwe
1.5 M Madagascar
1.5 M Luxembourg
1.4 M Côte d'Ivoire
1.4 M Kuwait
1.4 M Cameroon
1.3 M Oman
1.2 M Senegal
1.1 M Angola
1.1 M Iceland
1.1 M Montenegro
1.1 M Guadeloupe
997 K Martinique
957 K Cambodia
939 K Yemen
930 K Tanzania
922 K Bahrain
863 K Kyrgyzstan
782 K Mozambique
774 K Libya
758 K New Caledonia
669 K Mongolia
626 K Ethiopia
543 K Zambia
517 K Namibia
507 K Brunei Darussalam
492 K Haiti
489 K French Polynesia
480 K Fiji
479 K French Guiana
459 K Guyana
366 K Belize
360 K Botswana
343 K Bahamas
317 K Gabon
297 K Afghanistan
289 K Congo, Democratic Republic
276 K Maldives
250 K Suriname
248 K Mayotte
241 K Cape Verde
233 K Guam
199 K Saint Lucia
187 K Rwanda
184 K Antigua And Barbuda
179 K Benin
175 K Laos
174 K Andorra
153 K Saint Vincent And Grenadines
146 K Burkina Faso
144 K Aruba
130 K Tajikistan
129 K Grenada
115 K Togo
112 K Malawi
109 K Djibouti
106 K Congo
96 K Mauritania
92 K Monaco
90 K Guinea
90 K Saint Kitts And Nevis
90 K Seychelles
89 K Cayman Islands
88 K Bhutan
84 K Mali
76 K Faroe Islands
69 K Virgin Islands, U.S.
59 K Gibraltar
45 K Niger
23 K Equatorial Guinea

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.

480 million keywords. 155 countries

154 M United States
25 M Japan
21 M Germany
20 M United Kingdom
20 M France
17 M Brazil
17 M Canada
16 M India
16 M Australia
14 M Italy
12 M Russian Federation
11 M Spain
10 M Turkey
9.5 M Poland
9.1 M Mexico
8.4 M Indonesia
6 M Netherlands
5.2 M Ukraine
4.9 M Vietnam
4.8 M Argentina
4.1 M Thailand
3.8 M Colombia
3.5 M Sweden
3 M Taiwan
2.9 M Philippines
2.7 M Chile
2.4 M Venezuela
2.3 M Austria
2.2 M Denmark
2.1 M Czech Republic
2 M Peru
1.9 M Greece
1.9 M Israel
1.8 M Belgium
1.8 M Egypt
1.7 M Hungary
1.6 M Pakistan
1.6 M Singapore
1.5 M Malaysia
1.5 M Norway
1.5 M Romania
1.4 M Hong Kong
1.4 M Korea
1.4 M Finland
1.2 M Portugal
1.2 M South Africa
1.2 M New Zealand
1.2 M Algeria
1.1 M Ecuador
1.1 M Saudi Arabia
1 M Switzerland
962 K Morocco
850 K Bulgaria
777 K Serbia
760 K Slovakia
682 K Ireland
616 K Croatia
559 K Kazakhstan
532 K Belarus
521 K United Arab Emirates
415 K Uruguay
415 K Bangladesh
405 K Sri Lanka
403 K Dominican Republic
403 K Bolivia
401 K Tunisia
397 K Lithuania
357 K Costa Rica
343 K Slovenia
326 K Nigeria
323 K Guatemala
262 K Iraq
250 K Azerbaijan
244 K Bosnia & Herzegovina
231 K Latvia
229 K Panama
228 K Kenya
221 K Estonia
209 K El Salvador
190 K Paraguay
186 K Jordan
180 K Moldova
170 K Puerto Rico
162 K Honduras
158 K Armenia
158 K Georgia
120 K Ghana
119 K Jamaica
118 K Trinidad And Tobago
110 K Palestinian Territory
107 K Qatar
105 K Macedonia
105 K Lebanon
99 K Kuwait
96 K Mauritius
96 K Nicaragua
94 K Nepal
84 K Albania
80 K Cyprus
77 K Oman
74 K Tanzania
73 K Côte d'Ivoire
65 K Malta
59 K Luxembourg
59 K Senegal
58 K Kyrgyzstan
58 K Cameroon
56 K Cambodia
49 K Bahrain
49 K Angola
49 K Libya
48 K Iceland
45 K Guadeloupe
43 K Zimbabwe
41 K Mozambique
40 K Montenegro
40 K Mongolia
39 K Madagascar
37 K Ethiopia
25 K Namibia
25 K Haiti
24 K Zambia
21 K Brunei Darussalam
19 K Fiji
18 K Afghanistan
17 K Bahamas
17 K Laos
16 K Guyana
16 K Suriname
15 K Congo, Democratic Republic
14 K Maldives
14 K Botswana
14 K Gabon
14 K Tajikistan
12 K Rwanda
11 K Belize
10 K Burkina Faso
9.3 K Congo
9.2 K Benin
9.1 K Cape Verde
8.3 K Mali
7.5 K Togo
6.8 K Saint Vincent And Grenadines
6.6 K Bhutan
6.2 K Andorra
5.8 K Antigua And Barbuda
5.5 K Niger
5.5 K Malawi
4.6 K Djibouti
3.7 K Virgin Islands, U.S.
3.5 K Seychelles
3.1 K Gibraltar
5 New Caledonia
2 Mauritania
1 Monaco

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