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.

485 million keywords. 155 countries

154 M United States
26 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
9.6 M Poland
9.2 M Mexico
8.6 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 Malaysia
1.6 M Singapore
1.5 M Norway
1.5 M Romania
1.5 M Korea
1.5 M Hong Kong
1.4 M Finland
1.3 M Portugal
1.2 M South Africa
1.2 M New Zealand
1.2 M Algeria
1.2 M Saudi Arabia
1.1 M Ecuador
1.1 M Switzerland
997 K Morocco
869 K Bulgaria
795 K Serbia
776 K Slovakia
703 K Ireland
630 K Croatia
577 K Kazakhstan
548 K Belarus
547 K United Arab Emirates
434 K Bangladesh
418 K Sri Lanka
418 K Uruguay
413 K Dominican Republic
412 K Tunisia
409 K Bolivia
405 K Lithuania
364 K Costa Rica
349 K Slovenia
335 K Nigeria
331 K Guatemala
274 K Iraq
258 K Azerbaijan
250 K Bosnia & Herzegovina
238 K Kenya
237 K Latvia
232 K Panama
225 K Estonia
213 K El Salvador
194 K Paraguay
193 K Jordan
184 K Moldova
176 K Puerto Rico
166 K Georgia
164 K Honduras
163 K Armenia
125 K Ghana
122 K Jamaica
121 K Trinidad And Tobago
114 K Palestinian Territory
111 K Qatar
109 K Lebanon
108 K Macedonia
103 K Kuwait
99 K Nepal
99 K Mauritius
98 K Nicaragua
88 K Albania
82 K Cyprus
81 K Oman
76 K Tanzania
76 K Côte d'Ivoire
67 K Malta
61 K Kyrgyzstan
61 K Senegal
60 K Luxembourg
59 K Cameroon
58 K Cambodia
52 K Angola
51 K Bahrain
50 K Libya
49 K Iceland
46 K Guadeloupe
45 K Zimbabwe
43 K Mongolia
42 K Mozambique
42 K Montenegro
40 K Madagascar
39 K Ethiopia
26 K Haiti
26 K Namibia
25 K Zambia
22 K Brunei Darussalam
20 K Fiji
19 K Afghanistan
18 K Bahamas
18 K Laos
17 K Guyana
16 K Suriname
15 K Congo, Democratic Republic
15 K Maldives
15 K Botswana
14 K Gabon
14 K Tajikistan
13 K Rwanda
12 K Belize
11 K Burkina Faso
9.5 K Benin
9.5 K Congo
9.3 K Cape Verde
8.6 K Mali
7.8 K Togo
6.9 K Saint Vincent And Grenadines
6.8 K Bhutan
6.4 K Andorra
6 K Antigua And Barbuda
5.7 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