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.

8.3 billion keywords. 10 search engines. 171 countries.

Google

8.3 B
YouTube

760 M
Yahoo

156 M
Amazon

142 M
Bing

107 M
Yandex

87 M
Naver

16 M
Seznam

7.9 M
Baidu

3.2 M
Daum

1.7 M

8.3 billion keywords

3.6 B United States
559 M Brazil
372 M France
337 M United Kingdom
203 M Germany
198 M Spain
191 M Poland
175 M Italy
150 M Mexico
149 M Russian Federation
143 M Canada
130 M Argentina
125 M Japan
122 M India
110 M Colombia
103 M Australia
85 M Ukraine
65 M Indonesia
63 M Chile
62 M Turkey
54 M Czech Republic
53 M Philippines
53 M Netherlands
52 M Venezuela
50 M Taiwan
47 M Belgium
46 M Peru
41 M Hungary
41 M Greece
37 M Ecuador
33 M Romania
33 M Finland
30 M Portugal
30 M Pakistan
29 M Sweden
29 M Vietnam
29 M Egypt
28 M Malaysia
25 M Thailand
25 M Algeria
25 M South Africa
24 M Morocco
24 M Norway
23 M Korea
23 M Austria
22 M New Zealand
21 M Switzerland
20 M Serbia
19 M Denmark
19 M Slovakia
18 M Bulgaria
17 M Saudi Arabia
16 M Israel
15 M Croatia
15 M Hong Kong
15 M Bolivia
15 M Belarus
14 M Uruguay
14 M Ireland
14 M Singapore
12 M Tunisia
12 M Kazakhstan
12 M Dominican Republic
11 M Costa Rica
9.7 M Lithuania
9.1 M Slovenia
8.9 M Guatemala
8.5 M Sri Lanka
8.5 M Bangladesh
7.7 M United Arab Emirates
7 M Panama
6.7 M Bosnia & Herzegovina
6.7 M Nigeria
6.7 M El Salvador
6.6 M Latvia
6.4 M Paraguay
6.3 M Estonia
5.6 M Moldova
5.1 M Honduras
4.1 M Kenya
4 M Azerbaijan
3.7 M Puerto Rico
3.5 M Armenia
3.5 M Trinidad And Tobago
3.2 M Jordan
3.1 M Mauritius
2.9 M Reunion
2.9 M Jamaica
2.9 M Macedonia
2.8 M Nicaragua
2.8 M Georgia
2.6 M Iraq
2.3 M Ghana
2.2 M Palestinian Territory
1.9 M Malta
1.9 M Nepal
1.8 M Lebanon
1.8 M Albania
1.8 M Qatar
1.8 M Cyprus
1.6 M Zimbabwe
1.6 M Madagascar
1.6 M Luxembourg
1.5 M Kuwait
1.5 M Côte d'Ivoire
1.5 M Cameroon
1.4 M Oman
1.3 M Senegal
1.2 M Angola
1.2 M Iceland
1.1 M Montenegro
1.1 M Guadeloupe
1.1 M Martinique
1 M Cambodia
1 M Tanzania
995 K Yemen
987 K Bahrain
934 K Kyrgyzstan
835 K Mozambique
827 K Libya
805 K New Caledonia
748 K Mongolia
699 K Ethiopia
593 K Zambia
566 K Namibia
541 K Brunei Darussalam
534 K Haiti
534 K Fiji
521 K French Polynesia
507 K French Guiana
496 K Guyana
394 K Belize
391 K Botswana
370 K Bahamas
345 K Gabon
318 K Afghanistan
311 K Congo, Democratic Republic
299 K Maldives
273 K Suriname
263 K Mayotte
258 K Cape Verde
252 K Guam
221 K Rwanda
220 K Saint Lucia
199 K Laos
196 K Antigua And Barbuda
194 K Benin
184 K Andorra
164 K Saint Vincent And Grenadines
155 K Burkina Faso
154 K Aruba
142 K Grenada
138 K Tajikistan
132 K Togo
123 K Malawi
116 K Djibouti
114 K Congo
103 K Mauritania
99 K Seychelles
98 K Monaco
97 K Bhutan
97 K Cayman Islands
95 K Saint Kitts And Nevis
94 K Guinea
94 K Mali
83 K Faroe Islands
75 K Virgin Islands, U.S.
65 K Gibraltar
48 K Niger
25 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.

487 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
10 M Turkey
9.6 M Poland
9.2 M Mexico
8.6 M Indonesia
6.1 M Netherlands
5.3 M Ukraine
5 M Vietnam
4.9 M Argentina
4.3 M Thailand
3.8 M Colombia
3.6 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
2.1 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 New Zealand
1.2 M Algeria
1.2 M Saudi Arabia
1.1 M Ecuador
1.1 M Switzerland
1 M Morocco
874 K Bulgaria
800 K Serbia
780 K Slovakia
711 K Ireland
635 K Croatia
580 K Kazakhstan
553 K Belarus
552 K United Arab Emirates
442 K Bangladesh
424 K Sri Lanka
420 K Uruguay
416 K Dominican Republic
415 K Tunisia
411 K Bolivia
409 K Lithuania
367 K Costa Rica
352 K Slovenia
339 K Nigeria
333 K Guatemala
278 K Iraq
260 K Azerbaijan
251 K Bosnia & Herzegovina
242 K Kenya
238 K Latvia
233 K Panama
227 K Estonia
214 K El Salvador
195 K Jordan
195 K Paraguay
186 K Moldova
178 K Puerto Rico
168 K Georgia
165 K Honduras
165 K Armenia
126 K Ghana
124 K Jamaica
122 K Trinidad And Tobago
115 K Palestinian Territory
112 K Qatar
110 K Lebanon
109 K Macedonia
104 K Kuwait
101 K Nepal
99 K Mauritius
99 K Nicaragua
89 K Albania
83 K Cyprus
82 K Oman
77 K Tanzania
77 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
43 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
9.7 K Benin
9.5 K Congo
9.4 K Cape Verde
8.8 K Mali
7.9 K Togo
7 K Saint Vincent And Grenadines
6.9 K Bhutan
6.4 K Andorra
6 K Antigua And Barbuda
5.7 K Malawi
5.6 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