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.

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

8 billion keywords

3.4 B United States
551 M Brazil
365 M France
332 M United Kingdom
200 M Germany
194 M Spain
187 M Poland
171 M Italy
147 M Mexico
147 M Russian Federation
142 M Canada
128 M Argentina
121 M Japan
119 M India
109 M Colombia
102 M Australia
83 M Ukraine
63 M Indonesia
62 M Chile
60 M Turkey
53 M Czech Republic
52 M Philippines
51 M Venezuela
51 M Netherlands
48 M Taiwan
47 M Belgium
45 M Peru
40 M Hungary
40 M Greece
36 M Ecuador
32 M Romania
32 M Finland
29 M Pakistan
29 M Portugal
29 M Vietnam
29 M Sweden
28 M Egypt
28 M Malaysia
25 M Algeria
24 M Thailand
24 M South Africa
24 M Morocco
24 M Norway
23 M Korea
22 M Austria
21 M New Zealand
21 M Switzerland
20 M Serbia
19 M Denmark
19 M Slovakia
18 M Bulgaria
17 M Saudi Arabia
15 M Israel
15 M Croatia
15 M Hong Kong
15 M Bolivia
14 M Belarus
14 M Uruguay
14 M Ireland
13 M Singapore
12 M Tunisia
12 M Kazakhstan
12 M Dominican Republic
11 M Costa Rica
9.4 M Lithuania
8.9 M Slovenia
8.5 M Guatemala
8.4 M Bangladesh
8.3 M Sri Lanka
7.6 M United Arab Emirates
6.8 M Panama
6.7 M Bosnia & Herzegovina
6.6 M El Salvador
6.5 M Nigeria
6.5 M Latvia
6.2 M Paraguay
6.1 M Estonia
5.5 M Moldova
5 M Honduras
3.9 M Azerbaijan
3.9 M Kenya
3.6 M Puerto Rico
3.5 M Armenia
3.4 M Trinidad And Tobago
3.1 M Jordan
3 M Mauritius
2.8 M Reunion
2.8 M Jamaica
2.8 M Macedonia
2.8 M Nicaragua
2.7 M Georgia
2.5 M Iraq
2.2 M Ghana
2.2 M Palestinian Territory
1.8 M Malta
1.8 M Albania
1.8 M Nepal
1.8 M Lebanon
1.7 M Qatar
1.7 M Cyprus
1.6 M Zimbabwe
1.5 M Madagascar
1.5 M Luxembourg
1.5 M Côte d'Ivoire
1.5 M Kuwait
1.5 M Cameroon
1.4 M Oman
1.2 M Senegal
1.2 M Angola
1.2 M Iceland
1.1 M Montenegro
1.1 M Guadeloupe
1 M Martinique
1 M Cambodia
976 K Tanzania
972 K Yemen
972 K Bahrain
911 K Kyrgyzstan
814 K Mozambique
809 K Libya
786 K New Caledonia
723 K Mongolia
670 K Ethiopia
574 K Zambia
546 K Namibia
532 K Brunei Darussalam
518 K Haiti
513 K Fiji
509 K French Polynesia
497 K French Guiana
483 K Guyana
388 K Belize
384 K Botswana
364 K Bahamas
334 K Gabon
313 K Afghanistan
306 K Congo, Democratic Republic
289 K Maldives
264 K Suriname
258 K Mayotte
254 K Cape Verde
245 K Guam
212 K Saint Lucia
207 K Rwanda
194 K Antigua And Barbuda
190 K Benin
190 K Laos
181 K Andorra
160 K Saint Vincent And Grenadines
153 K Burkina Faso
152 K Aruba
138 K Grenada
135 K Tajikistan
125 K Togo
119 K Malawi
114 K Djibouti
112 K Congo
100 K Mauritania
96 K Monaco
95 K Seychelles
95 K Bhutan
94 K Cayman Islands
93 K Saint Kitts And Nevis
92 K Guinea
90 K Mali
80 K Faroe Islands
73 K Virgin Islands, U.S.
62 K Gibraltar
47 K Niger
24 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.

483 million keywords. 155 countries

154 M United States
25 M Japan
21 M Germany
21 M United Kingdom
20 M France
17 M Brazil
17 M Canada
17 M India
16 M Australia
14 M Italy
13 M Russian Federation
11 M Spain
10 M Turkey
9.5 M Poland
9.1 M Mexico
8.5 M Indonesia
6 M Netherlands
5.3 M Ukraine
5 M Vietnam
4.9 M Argentina
4.2 M Thailand
3.8 M Colombia
3.5 M Sweden
3.1 M Taiwan
3 M Philippines
2.8 M Chile
2.4 M Venezuela
2.3 M Austria
2.2 M Denmark
2.1 M Czech Republic
2 M Peru
2 M Greece
1.9 M Israel
1.9 M Belgium
1.9 M Egypt
1.7 M Hungary
1.7 M Pakistan
1.6 M Singapore
1.6 M Malaysia
1.5 M Norway
1.5 M Romania
1.5 M Hong Kong
1.5 M Korea
1.4 M Finland
1.3 M Portugal
1.2 M South Africa
1.2 M New Zealand
1.2 M Algeria
1.1 M Saudi Arabia
1.1 M Ecuador
1.1 M Switzerland
979 K Morocco
862 K Bulgaria
789 K Serbia
770 K Slovakia
696 K Ireland
625 K Croatia
563 K Kazakhstan
543 K Belarus
539 K United Arab Emirates
429 K Bangladesh
417 K Uruguay
410 K Dominican Republic
410 K Sri Lanka
408 K Tunisia
407 K Bolivia
400 K Lithuania
362 K Costa Rica
347 K Slovenia
329 K Nigeria
329 K Guatemala
270 K Iraq
255 K Azerbaijan
247 K Bosnia & Herzegovina
233 K Latvia
232 K Kenya
230 K Panama
224 K Estonia
211 K El Salvador
193 K Paraguay
189 K Jordan
182 K Moldova
174 K Puerto Rico
163 K Honduras
163 K Georgia
162 K Armenia
123 K Ghana
121 K Jamaica
120 K Trinidad And Tobago
113 K Palestinian Territory
109 K Qatar
106 K Macedonia
106 K Lebanon
100 K Kuwait
97 K Mauritius
96 K Nicaragua
96 K Nepal
87 K Albania
81 K Cyprus
78 K Oman
75 K Tanzania
75 K Côte d'Ivoire
66 K Malta
60 K Senegal
59 K Kyrgyzstan
59 K Luxembourg
59 K Cameroon
57 K Cambodia
51 K Angola
51 K Bahrain
50 K Libya
49 K Iceland
45 K Guadeloupe
45 K Zimbabwe
41 K Mozambique
41 K Mongolia
41 K Montenegro
39 K Madagascar
38 K Ethiopia
25 K Haiti
25 K Namibia
25 K Zambia
21 K Brunei Darussalam
20 K Fiji
18 K Afghanistan
17 K Bahamas
17 K Laos
16 K Guyana
16 K Suriname
15 K Congo, Democratic Republic
15 K Botswana
15 K Maldives
14 K Gabon
14 K Tajikistan
12 K Rwanda
12 K Belize
11 K Burkina Faso
9.4 K Benin
9.4 K Congo
9.3 K Cape Verde
8.4 K Mali
7.7 K Togo
6.9 K Saint Vincent And Grenadines
6.7 K Bhutan
6.3 K Andorra
5.9 K Antigua And Barbuda
5.6 K Malawi
5.6 K Niger
4.7 K Djibouti
3.8 K Virgin Islands, U.S.
3.5 K Seychelles
3.2 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