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.

9.8 billion keywords. 10 search engines. 171 countries.

Google

8.4 B
YouTube

797 M
Yahoo

203 M
Amazon

149 M
Bing

112 M
Yandex

91 M
Naver

17 M
Seznam

8.2 M
Baidu

3.3 M
Daum

1.7 M

9.8 billion keywords

3.6 B United States
572 M Brazil
375 M France
340 M United Kingdom
208 M Germany
200 M Spain
193 M Poland
177 M Italy
152 M Mexico
151 M Russian Federation
145 M Canada
133 M Argentina
132 M Japan
123 M India
112 M Colombia
105 M Australia
86 M Ukraine
65 M Indonesia
64 M Chile
62 M Turkey
56 M Czech Republic
54 M Philippines
53 M Netherlands
52 M Venezuela
50 M Taiwan
48 M Belgium
47 M Peru
41 M Hungary
41 M Greece
37 M Ecuador
33 M Romania
33 M Finland
30 M Portugal
30 M Pakistan
30 M Sweden
30 M Vietnam
29 M Egypt
29 M Malaysia
26 M Thailand
26 M Algeria
25 M South Africa
24 M Morocco
24 M Norway
24 M Korea
23 M Austria
22 M Switzerland
22 M New Zealand
20 M Serbia
20 M Denmark
19 M Slovakia
19 M Bulgaria
17 M Saudi Arabia
16 M Israel
16 M Croatia
16 M Hong Kong
15 M Bolivia
15 M Belarus
14 M Uruguay
14 M Ireland
14 M Singapore
13 M Tunisia
12 M Kazakhstan
12 M Dominican Republic
11 M Costa Rica
9.8 M Lithuania
9.2 M Slovenia
9 M Guatemala
8.8 M Bangladesh
8.6 M Sri Lanka
7.9 M United Arab Emirates
7.1 M Panama
6.9 M Bosnia & Herzegovina
6.8 M Nigeria
6.8 M El Salvador
6.7 M Latvia
6.5 M Paraguay
6.4 M Estonia
5.7 M Moldova
5.2 M Honduras
4.2 M Kenya
4 M Azerbaijan
3.7 M Puerto Rico
3.5 M Armenia
3.5 M Trinidad And Tobago
3.2 M Jordan
3.2 M Mauritius
2.9 M Reunion
2.9 M Jamaica
2.9 M Macedonia
2.9 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
1.9 M Albania
1.8 M Lebanon
1.8 M Qatar
1.8 M Cyprus
1.6 M Zimbabwe
1.6 M Madagascar
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
1.1 M Guadeloupe
1.1 M Martinique
1.1 M Cambodia
1 M Tanzania
1 M Bahrain
1 M Yemen
947 K Kyrgyzstan
845 K Mozambique
837 K Libya
813 K New Caledonia
764 K Mongolia
712 K Ethiopia
601 K Zambia
576 K Namibia
559 K Brunei Darussalam
545 K Fiji
542 K Haiti
527 K French Polynesia
512 K French Guiana
503 K Guyana
408 K Belize
407 K Botswana
381 K Bahamas
349 K Gabon
327 K Afghanistan
322 K Congo, Democratic Republic
303 K Maldives
277 K Suriname
266 K Mayotte
264 K Cape Verde
257 K Guam
228 K Rwanda
223 K Saint Lucia
204 K Laos
202 K Antigua And Barbuda
201 K Benin
189 K Andorra
167 K Saint Vincent And Grenadines
159 K Burkina Faso
158 K Aruba
145 K Grenada
139 K Tajikistan
135 K Togo
125 K Malawi
118 K Djibouti
117 K Congo
104 K Mauritania
102 K Bhutan
100 K Seychelles
100 K Monaco
98 K Cayman Islands
96 K Saint Kitts And Nevis
96 K Mali
95 K Guinea
84 K Faroe Islands
77 K Virgin Islands, U.S.
66 K Gibraltar
49 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.

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