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.

10.1 billion keywords. 10 search engines. 171 countries.

Google

8.6 B
YouTube

828 M
Yahoo

209 M
Amazon

156 M
Bing

116 M
Yandex

95 M
Naver

18 M
Seznam

8.4 M
Baidu

3.5 M
Daum

1.8 M

10.1 billion keywords

3.7 B United States
585 M Brazil
382 M France
345 M United Kingdom
213 M Germany
205 M Spain
197 M Poland
181 M Italy
156 M Mexico
153 M Russian Federation
148 M Canada
137 M Argentina
135 M Japan
126 M India
114 M Colombia
107 M Australia
88 M Ukraine
67 M Indonesia
65 M Chile
64 M Turkey
57 M Czech Republic
55 M Philippines
55 M Netherlands
53 M Venezuela
52 M Taiwan
49 M Belgium
48 M Peru
42 M Hungary
42 M Greece
38 M Ecuador
34 M Finland
34 M Romania
31 M Portugal
31 M Pakistan
31 M Sweden
30 M Vietnam
30 M Malaysia
29 M Egypt
27 M Thailand
26 M South Africa
26 M Algeria
25 M Morocco
25 M Korea
25 M Norway
24 M Austria
23 M Switzerland
22 M New Zealand
21 M Serbia
21 M Denmark
20 M Slovakia
19 M Bulgaria
18 M Saudi Arabia
17 M Israel
16 M Hong Kong
16 M Croatia
16 M Bolivia
15 M Belarus
15 M Ireland
15 M Uruguay
14 M Singapore
13 M Tunisia
13 M Kazakhstan
12 M Dominican Republic
12 M Costa Rica
10 M Lithuania
9.4 M Slovenia
9.2 M Guatemala
9 M Bangladesh
8.8 M Sri Lanka
8.1 M United Arab Emirates
7.3 M Panama
7 M Nigeria
7 M Bosnia & Herzegovina
6.9 M El Salvador
6.8 M Latvia
6.6 M Paraguay
6.6 M Estonia
5.7 M Moldova
5.3 M Honduras
4.3 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
3.3 M Mauritius
3 M Jamaica
3 M Reunion
3 M Macedonia
2.9 M Nicaragua
2.9 M Georgia
2.7 M Iraq
2.4 M Ghana
2.3 M Palestinian Territory
2 M Malta
2 M Nepal
1.9 M Albania
1.9 M Lebanon
1.9 M Qatar
1.9 M Cyprus
1.7 M Madagascar
1.7 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 Bahrain
1 M Tanzania
1 M Yemen
971 K Kyrgyzstan
862 K Mozambique
854 K Libya
829 K New Caledonia
793 K Mongolia
738 K Ethiopia
615 K Zambia
594 K Namibia
575 K Brunei Darussalam
563 K Fiji
555 K Haiti
537 K French Polynesia
522 K French Guiana
517 K Guyana
424 K Belize
420 K Botswana
393 K Bahamas
358 K Gabon
335 K Afghanistan
331 K Congo, Democratic Republic
312 K Maldives
284 K Suriname
270 K Cape Verde
270 K Mayotte
264 K Guam
239 K Rwanda
230 K Saint Lucia
213 K Laos
208 K Antigua And Barbuda
207 K Benin
193 K Andorra
171 K Saint Vincent And Grenadines
163 K Burkina Faso
163 K Aruba
149 K Grenada
142 K Tajikistan
141 K Togo
129 K Malawi
121 K Djibouti
120 K Congo
106 K Bhutan
105 K Mauritania
104 K Seychelles
102 K Monaco
101 K Cayman Islands
99 K Mali
98 K Saint Kitts And Nevis
97 K Guinea
86 K Faroe Islands
79 K Virgin Islands, U.S.
68 K Gibraltar
50 K Niger
27 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.

494 million keywords. 155 countries

157 M United States
26 M Japan
22 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
9.7 M Poland
9.4 M Mexico
8.8 M Indonesia
6.1 M Netherlands
5.5 M Ukraine
5.1 M Vietnam
5 M Argentina
4.4 M Thailand
3.9 M Colombia
3.6 M Sweden
3.2 M Taiwan
3.1 M Philippines
2.8 M Chile
2.4 M Venezuela
2.4 M Austria
2.2 M Denmark
2.1 M Peru
2.1 M Czech Republic
2 M Greece
2 M Belgium
2 M Israel
2 M Egypt
1.8 M Hungary
1.8 M Pakistan
1.7 M Malaysia
1.6 M Singapore
1.6 M Romania
1.6 M Korea
1.6 M Norway
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
901 K Bulgaria
820 K Serbia
798 K Slovakia
740 K Ireland
652 K Croatia
602 K Kazakhstan
578 K United Arab Emirates
571 K Belarus
461 K Bangladesh
441 K Sri Lanka
428 K Dominican Republic
426 K Tunisia
425 K Uruguay
422 K Lithuania
417 K Bolivia
376 K Costa Rica
359 K Slovenia
354 K Nigeria
341 K Guatemala
289 K Iraq
268 K Azerbaijan
259 K Bosnia & Herzegovina
255 K Kenya
245 K Latvia
238 K Panama
232 K Estonia
217 K El Salvador
202 K Jordan
200 K Paraguay
192 K Moldova
185 K Puerto Rico
176 K Georgia
169 K Armenia
168 K Honduras
132 K Ghana
128 K Jamaica
125 K Trinidad And Tobago
119 K Palestinian Territory
117 K Qatar
115 K Lebanon
114 K Macedonia
109 K Kuwait
107 K Nepal
103 K Nicaragua
101 K Mauritius
92 K Albania
87 K Cyprus
86 K Oman
81 K Tanzania
80 K Côte d'Ivoire
70 K Malta
65 K Kyrgyzstan
64 K Senegal
63 K Luxembourg
62 K Cameroon
62 K Cambodia
55 K Angola
54 K Bahrain
52 K Libya
51 K Iceland
48 K Zimbabwe
47 K Guadeloupe
46 K Mongolia
44 K Mozambique
44 K Montenegro
42 K Ethiopia
41 K Madagascar
27 K Haiti
27 K Namibia
26 K Zambia
23 K Brunei Darussalam
21 K Fiji
20 K Afghanistan
19 K Laos
19 K Bahamas
18 K Guyana
17 K Suriname
16 K Congo, Democratic Republic
16 K Maldives
16 K Botswana
15 K Gabon
15 K Tajikistan
14 K Rwanda
12 K Belize
11 K Burkina Faso
10 K Benin
9.8 K Congo
9.7 K Cape Verde
9.1 K Mali
8.3 K Togo
7.2 K Bhutan
7.1 K Saint Vincent And Grenadines
6.6 K Andorra
6.2 K Antigua And Barbuda
6 K Malawi
5.8 K Niger
4.9 K Djibouti
3.9 K Virgin Islands, U.S.
3.6 K Seychelles
3.3 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