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.

492 million keywords. 155 countries

156 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
8.7 M Indonesia
6.1 M Netherlands
5.4 M Ukraine
5.1 M Vietnam
5 M Argentina
4.3 M Thailand
3.8 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 Czech Republic
2.1 M Peru
2 M Greece
2 M Belgium
2 M Israel
1.9 M Egypt
1.8 M Hungary
1.7 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
893 K Bulgaria
815 K Serbia
791 K Slovakia
732 K Ireland
648 K Croatia
594 K Kazakhstan
572 K United Arab Emirates
566 K Belarus
456 K Bangladesh
436 K Sri Lanka
424 K Dominican Republic
424 K Uruguay
423 K Tunisia
418 K Lithuania
416 K Bolivia
374 K Costa Rica
357 K Slovenia
350 K Nigeria
340 K Guatemala
286 K Iraq
265 K Azerbaijan
256 K Bosnia & Herzegovina
252 K Kenya
243 K Latvia
236 K Panama
230 K Estonia
216 K El Salvador
200 K Jordan
198 K Paraguay
190 K Moldova
183 K Puerto Rico
174 K Georgia
168 K Honduras
168 K Armenia
130 K Ghana
127 K Jamaica
124 K Trinidad And Tobago
118 K Palestinian Territory
116 K Qatar
113 K Lebanon
112 K Macedonia
108 K Kuwait
105 K Nepal
102 K Nicaragua
101 K Mauritius
91 K Albania
86 K Cyprus
85 K Oman
80 K Tanzania
80 K Côte d'Ivoire
69 K Malta
64 K Kyrgyzstan
63 K Senegal
63 K Luxembourg
62 K Cameroon
61 K Cambodia
55 K Angola
53 K Bahrain
52 K Libya
51 K Iceland
47 K Zimbabwe
47 K Guadeloupe
46 K Mongolia
44 K Mozambique
43 K Montenegro
41 K Ethiopia
41 K Madagascar
27 K Haiti
27 K Namibia
26 K Zambia
23 K Brunei Darussalam
21 K Fiji
20 K Afghanistan
18 K Laos
18 K Bahamas
17 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
9.7 K Congo
9.6 K Cape Verde
9 K Mali
8.2 K Togo
7.1 K Bhutan
7.1 K Saint Vincent And Grenadines
6.5 K Andorra
6.1 K Antigua And Barbuda
5.9 K Malawi
5.7 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