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Bringing Big Data to SEO Professionals - Ahrefs

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
Show more

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
Show more