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.

2000 Servers

64K CPU cores
400TB RAM
40PB+ HDD
10PB 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.

9.9 billion keywords. 10 search engines. 171 countries.

Google

8.5 B
YouTube

813 M
Yahoo

206 M
Amazon

152 M
Bing

114 M
Yandex

93 M
Naver

17 M
Seznam

8.3 M
Baidu

3.4 M
Daum

1.8 M

9.9 billion keywords

3.7 B United States
579 M Brazil
379 M France
342 M United Kingdom
210 M Germany
202 M Spain
195 M Poland
179 M Italy
154 M Mexico
152 M Russian Federation
147 M Canada
135 M Argentina
134 M Japan
125 M India
113 M Colombia
106 M Australia
87 M Ukraine
66 M Indonesia
65 M Chile
63 M Turkey
56 M Czech Republic
55 M Philippines
54 M Netherlands
52 M Venezuela
51 M Taiwan
49 M Belgium
47 M Peru
42 M Hungary
41 M Greece
38 M Ecuador
34 M Finland
34 M Romania
31 M Portugal
31 M Pakistan
30 M Sweden
30 M Vietnam
29 M Egypt
29 M Malaysia
26 M Thailand
26 M Algeria
26 M South Africa
25 M Morocco
24 M Norway
24 M Korea
23 M Austria
22 M Switzerland
22 M New Zealand
20 M Serbia
20 M Denmark
20 M Slovakia
19 M Bulgaria
17 M Saudi Arabia
16 M Israel
16 M Hong Kong
16 M Croatia
15 M Bolivia
15 M Belarus
15 M Ireland
15 M Uruguay
14 M Singapore
13 M Tunisia
13 M Kazakhstan
12 M Dominican Republic
11 M Costa Rica
9.9 M Lithuania
9.3 M Slovenia
9.1 M Guatemala
8.9 M Bangladesh
8.7 M Sri Lanka
8 M United Arab Emirates
7.2 M Panama
6.9 M Nigeria
6.9 M Bosnia & Herzegovina
6.9 M El Salvador
6.7 M Latvia
6.5 M Paraguay
6.5 M Estonia
5.7 M Moldova
5.3 M Honduras
4.2 M Kenya
4.1 M Azerbaijan
3.8 M Puerto Rico
3.6 M Trinidad And Tobago
3.6 M Armenia
3.3 M Jordan
3.2 M Mauritius
3 M Reunion
3 M Jamaica
2.9 M Macedonia
2.9 M Nicaragua
2.9 M Georgia
2.7 M Iraq
2.4 M Ghana
2.2 M Palestinian Territory
2 M Malta
1.9 M Nepal
1.9 M Albania
1.9 M Lebanon
1.8 M Qatar
1.8 M Cyprus
1.6 M Madagascar
1.6 M Zimbabwe
1.6 M Luxembourg
1.6 M Kuwait
1.6 M Côte d'Ivoire
1.5 M Cameroon
1.5 M Oman
1.3 M Senegal
1.3 M Angola
1.2 M Iceland
1.2 M Montenegro
1.2 M Guadeloupe
1.1 M Martinique
1.1 M Cambodia
1 M Tanzania
1 M Bahrain
1 M Yemen
959 K Kyrgyzstan
854 K Mozambique
846 K Libya
821 K New Caledonia
779 K Mongolia
725 K Ethiopia
608 K Zambia
586 K Namibia
568 K Brunei Darussalam
556 K Fiji
548 K Haiti
532 K French Polynesia
517 K French Guiana
511 K Guyana
416 K Belize
414 K Botswana
387 K Bahamas
354 K Gabon
331 K Afghanistan
326 K Congo, Democratic Republic
308 K Maldives
281 K Suriname
268 K Mayotte
267 K Cape Verde
260 K Guam
234 K Rwanda
227 K Saint Lucia
209 K Laos
205 K Antigua And Barbuda
204 K Benin
191 K Andorra
169 K Saint Vincent And Grenadines
161 K Burkina Faso
160 K Aruba
147 K Grenada
141 K Tajikistan
139 K Togo
127 K Malawi
120 K Djibouti
119 K Congo
105 K Mauritania
104 K Bhutan
102 K Seychelles
101 K Monaco
100 K Cayman Islands
97 K Mali
97 K Saint Kitts And Nevis
96 K Guinea
85 K Faroe Islands
78 K Virgin Islands, U.S.
67 K Gibraltar
50 K Niger
26 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.

489 million keywords. 155 countries

156 M United States
26 M Japan
21 M Germany
21 M United Kingdom
20 M France
17 M Canada
17 M Brazil
17 M India
16 M Australia
14 M Italy
13 M Russian Federation
11 M Spain
11 M Turkey
9.6 M Poland
9.3 M Mexico
8.6 M Indonesia
6.1 M Netherlands
5.4 M Ukraine
5.1 M Vietnam
4.9 M Argentina
4.3 M Thailand
3.8 M Colombia
3.6 M Sweden
3.2 M Taiwan
3 M Philippines
2.8 M Chile
2.4 M Venezuela
2.4 M Austria
2.2 M Denmark
2.1 M Czech Republic
2.1 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
1.6 M Romania
1.5 M Norway
1.5 M Korea
1.5 M Hong Kong
1.4 M Finland
1.3 M Portugal
1.3 M South Africa
1.2 M Algeria
1.2 M New Zealand
1.2 M Saudi Arabia
1.1 M Ecuador
1.1 M Switzerland
1 M Morocco
879 K Bulgaria
804 K Serbia
783 K Slovakia
715 K Ireland
638 K Croatia
583 K Kazakhstan
556 K United Arab Emirates
556 K Belarus
445 K Bangladesh
427 K Sri Lanka
421 K Uruguay
418 K Dominican Republic
417 K Tunisia
412 K Bolivia
411 K Lithuania
369 K Costa Rica
353 K Slovenia
341 K Nigeria
335 K Guatemala
279 K Iraq
261 K Azerbaijan
253 K Bosnia & Herzegovina
244 K Kenya
240 K Latvia
234 K Panama
228 K Estonia
214 K El Salvador
196 K Jordan
196 K Paraguay
187 K Moldova
179 K Puerto Rico
169 K Georgia
166 K Honduras
165 K Armenia
127 K Ghana
124 K Jamaica
122 K Trinidad And Tobago
116 K Palestinian Territory
113 K Qatar
110 K Lebanon
110 K Macedonia
105 K Kuwait
102 K Nepal
100 K Nicaragua
100 K Mauritius
89 K Albania
84 K Cyprus
82 K Oman
78 K Tanzania
78 K Côte d'Ivoire
68 K Malta
62 K Kyrgyzstan
62 K Senegal
61 K Luxembourg
60 K Cameroon
59 K Cambodia
53 K Angola
52 K Bahrain
51 K Libya
50 K Iceland
46 K Guadeloupe
46 K Zimbabwe
44 K Mongolia
43 K Mozambique
42 K Montenegro
40 K Madagascar
40 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
9.8 K Benin
9.6 K Congo
9.5 K Cape Verde
8.8 K Mali
8 K Togo
7 K Saint Vincent And Grenadines
6.9 K Bhutan
6.4 K Andorra
6 K Antigua And Barbuda
5.8 K Malawi
5.7 K Niger
4.8 K Djibouti
3.8 K Virgin Islands, U.S.
3.6 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