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

  • 100K CPU cores
  • 600TB RAM
  • 30PB HDD
  • 50PB 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
    30 million new pages
  • Every 24 hours we update metrics for
    350 million pages
  • Total content index size
    5.02 billion pages

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.

11.6 billion keywords. 10 search engines. 229 countries.

  • Google
    9.5 B
  • YouTube
    1.3 B
  • Yahoo
    261 M
  • Amazon
    232 M
  • Yandex
    170 M
  • Bing
    157 M
  • Naver
    33 M
  • Seznam
    14 M
  • Baidu
    5.7 M
  • Daum
    3.3 M

11.6 billion keywords

  • 4 B United States
  • 636 M Brazil
  • 424 M France
  • 372 M United Kingdom
  • 245 M Germany
  • 231 M Spain
  • 219 M Poland
  • 206 M Italy
  • 176 M Mexico
  • 162 M Canada
  • 161 M Russian Federation
  • 155 M Argentina
  • 149 M Japan
  • 140 M India
  • 125 M Colombia
  • 115 M Australia
  • 97 M Ukraine
  • 74 M Chile
  • 72 M Indonesia
  • 71 M Turkey
  • 65 M Czechia
  • 64 M Netherlands
  • 62 M Philippines
  • 58 M Venezuela
  • 57 M Belgium
  • 56 M Taiwan
  • 54 M Peru
  • 48 M Greece
  • 48 M Hungary
  • 43 M Ecuador
  • 39 M Finland
  • 39 M Romania
  • 36 M Thailand
  • 36 M Portugal
  • 35 M Sweden
  • 33 M Malaysia
  • 33 M Pakistan
  • 33 M Egypt
  • 31 M Vietnam
  • 30 M South Africa
  • 28 M Austria
  • 27 M Korea
  • 26 M Norway
  • 26 M Algeria
  • 26 M Switzerland
  • 25 M Morocco
  • 24 M New Zealand
  • 24 M Serbia
  • 23 M Denmark
  • 23 M Slovakia
  • 21 M Bulgaria
  • 20 M Saudi Arabia
  • 19 M Israel
  • 18 M Croatia
  • 18 M Hong Kong
  • 18 M Bolivia
  • 17 M Ireland
  • 17 M Uruguay
  • 16 M Singapore
  • 16 M Belarus
  • 14 M Dominican Republic
  • 14 M Costa Rica
  • 13 M Tunisia
  • 13 M Kazakhstan
  • 11 M Lithuania
  • 11 M Slovenia
  • 10 M Guatemala
  • 9.7 M Bangladesh
  • 9.6 M United Arab Emirates
  • 9.5 M Sri Lanka
  • 8.5 M Panama
  • 8.3 M Nigeria
  • 7.9 M Bosnia & Herzegovina
  • 7.9 M El Salvador
  • 7.8 M Latvia
  • 7.7 M Paraguay
  • 7.5 M Estonia
  • 6.1 M Honduras
  • 6 M Moldova
  • 5 M Kenya
  • 4.6 M Azerbaijan
  • 4.6 M Puerto Rico
  • 4.2 M Trinidad And Tobago
  • 3.9 M Jordan
  • 3.8 M Armenia
  • 3.8 M Mauritius
  • 3.6 M Reunion
  • 3.5 M Jamaica
  • 3.4 M North Macedonia
  • 3.4 M Nicaragua
  • 3.2 M Georgia
  • 3 M Iraq
  • 2.8 M Ghana
  • 2.4 M Palestinian Territory
  • 2.3 M Malta
  • 2.3 M Lebanon
  • 2.3 M Nepal
  • 2.3 M Albania
  • 2.2 M Qatar
  • 2.2 M Cyprus
  • 1.9 M Kuwait
  • 1.9 M Luxembourg
  • 1.9 M Madagascar
  • 1.8 M Côte d'Ivoire
  • 1.8 M Oman
  • 1.7 M Cameroon
  • 1.5 M Senegal
  • 1.4 M Angola
  • 1.4 M Iceland
  • 1.4 M Guadeloupe
  • 1.4 M Montenegro
  • 1.3 M Martinique
  • 1.3 M Zimbabwe
  • 1.3 M Yemen
  • 1.3 M Cambodia
  • 1.2 M Tanzania
  • 1.2 M Bahrain
  • 1.1 M Kyrgyzstan
  • 978 K Libya
  • 973 K Mozambique
  • 945 K New Caledonia
  • 926 K Iran, Islamic Republic Of
  • 922 K Mongolia
  • 876 K Ethiopia
  • 733 K Zambia
  • 706 K Namibia
  • 668 K Haiti
  • 652 K Brunei Darussalam
  • 652 K Fiji
  • 616 K French Guiana
  • 612 K French Polynesia
  • 594 K Guyana
  • 508 K Belize
  • 497 K Botswana
  • 462 K Bahamas
  • 431 K Gabon
  • 379 K Congo, Democratic Republic
  • 357 K Afghanistan
  • 354 K Maldives
  • 334 K Suriname
  • 318 K Cape Verde
  • 309 K Guam
  • 305 K Mayotte
  • 280 K Rwanda
  • 276 K Laos
  • 274 K Saint Lucia
  • 251 K Antigua And Barbuda
  • 244 K Benin
  • 225 K Andorra
  • 194 K Aruba
  • 193 K Burkina Faso
  • 178 K Saint Vincent And Grenadines
  • 176 K Grenada
  • 167 K Togo
  • 159 K Tajikistan
  • 149 K Malawi
  • 141 K Congo
  • 131 K Djibouti
  • 123 K Seychelles
  • 123 K Bhutan
  • 122 K Mali
  • 121 K Mauritania
  • 118 K Cayman Islands
  • 118 K Monaco
  • 113 K Saint Kitts And Nevis
  • 105 K Guinea
  • 101 K Faroe Islands
  • 96 K Virgin Islands, U.S.
  • 81 K Gibraltar
  • 63 K Niger
  • 30 K Equatorial Guinea
  • 23 K Uganda
  • 21 K Syrian Arab Republic
  • 18 K Uzbekistan
  • 17 K Myanmar
  • 15 K Sudan
  • 11 K China
  • 7 K Cuba
  • 5.8 K Macao
  • 3.9 K Somalia
  • 3.8 K Turkmenistan
  • 2.9 K Papua New Guinea
  • 2.1 K Jersey
  • 2 K Sierra Leone
  • 1.9 K Lesotho
  • 1.7 K Liberia
  • 1.7 K Isle Of Man
  • 1.3 K Swaziland
  • 1 K Gambia
  • 966 Guernsey
  • 715 Bermuda
  • 696 Liechtenstein
  • 673 Burundi
  • 651 Timor-Leste
  • 558 Chad
  • 429 Greenland
  • 389 Guinea-Bissau
  • 281 Aland Islands
  • 260 Dominica
  • 255 Northern Mariana Islands
  • 225 Turks And Caicos Islands
  • 216 Solomon Islands
  • 197 San Marino
  • 195 Samoa
  • 192 Virgin Islands, British
  • 166 Vanuatu
  • 153 American Samoa
  • 103 Tonga
  • 101 Central African Republic
  • 96 Saint Martin
  • 69 Sao Tome And Principe
  • 66 Micronesia, Federated States Of
  • 62 Anguilla
  • 59 Comoros
  • 56 Saint Barthelemy
  • 41 Eritrea
  • 38 Cook Islands
  • 36 Palau
  • 35 Saint Helena
  • 31 Marshall Islands
  • 18 Montserrat
  • 16 Svalbard And Jan Mayen
  • 13 Falkland Islands (Malvinas)
  • 11 Saint Pierre And Miquelon
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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.

464 million keywords. 155 countries

  • 161 M United States
  • 27 M Japan
  • 21 M United Kingdom
  • 18 M Germany
  • 18 M India
  • 16 M Australia
  • 15 M Canada
  • 15 M France
  • 12 M Italy
  • 11 M Russian Federation
  • 11 M Brazil
  • 11 M Turkey
  • 9.6 M Spain
  • 9.4 M Indonesia
  • 8.5 M Mexico
  • 7.3 M Poland
  • 6.1 M Netherlands
  • 5.4 M Vietnam
  • 4.7 M Ukraine
  • 4.7 M Thailand
  • 4.1 M Argentina
  • 3.5 M Sweden
  • 3.1 M Colombia
  • 2.9 M Taiwan
  • 2.4 M Philippines
  • 2.3 M Austria
  • 2.2 M Denmark
  • 1.9 M Israel
  • 1.9 M Chile
  • 1.8 M Belgium
  • 1.7 M Egypt
  • 1.7 M Malaysia
  • 1.7 M Peru
  • 1.6 M Czechia
  • 1.6 M Greece
  • 1.6 M Singapore
  • 1.6 M Hong Kong
  • 1.5 M Norway
  • 1.5 M Korea
  • 1.5 M Romania
  • 1.5 M Pakistan
  • 1.5 M Hungary
  • 1.4 M Venezuela
  • 1.3 M South Africa
  • 1.3 M Saudi Arabia
  • 1.2 M Finland
  • 1.2 M New Zealand
  • 1.2 M Portugal
  • 1.2 M Switzerland
  • 1.1 M Algeria
  • 943 K Ecuador
  • 941 K Morocco
  • 817 K Bulgaria
  • 757 K Ireland
  • 720 K Serbia
  • 694 K Slovakia
  • 611 K United Arab Emirates
  • 586 K Croatia
  • 586 K Kazakhstan
  • 526 K Belarus
  • 436 K Bangladesh
  • 412 K Sri Lanka
  • 393 K Lithuania
  • 383 K Dominican Republic
  • 377 K Tunisia
  • 373 K Nigeria
  • 361 K Uruguay
  • 349 K Bolivia
  • 347 K Costa Rica
  • 323 K Slovenia
  • 304 K Guatemala
  • 303 K Iraq
  • 289 K Azerbaijan
  • 261 K Kenya
  • 241 K Bosnia & Herzegovina
  • 223 K Latvia
  • 217 K Jordan
  • 217 K Puerto Rico
  • 216 K Panama
  • 202 K Estonia
  • 189 K El Salvador
  • 186 K Paraguay
  • 176 K Georgia
  • 174 K Moldova
  • 151 K Armenia
  • 148 K Honduras
  • 135 K Ghana
  • 132 K Qatar
  • 130 K Lebanon
  • 130 K Kuwait
  • 125 K Palestinian Territory
  • 119 K Jamaica
  • 115 K Trinidad And Tobago
  • 111 K Nepal
  • 107 K North Macedonia
  • 100 K Nicaragua
  • 95 K Oman
  • 95 K Tanzania
  • 93 K Cyprus
  • 91 K Albania
  • 90 K Mauritius
  • 81 K Côte d'Ivoire
  • 73 K Kyrgyzstan
  • 67 K Malta
  • 67 K Luxembourg
  • 64 K Senegal
  • 63 K Cambodia
  • 61 K Cameroon
  • 60 K Bahrain
  • 57 K Libya
  • 53 K Angola
  • 51 K Iceland
  • 50 K Mozambique
  • 49 K Zimbabwe
  • 49 K Mongolia
  • 46 K Guadeloupe
  • 46 K Montenegro
  • 44 K Ethiopia
  • 36 K Madagascar
  • 30 K Haiti
  • 30 K Zambia
  • 29 K Namibia
  • 24 K Brunei Darussalam
  • 22 K Laos
  • 22 K Afghanistan
  • 21 K Fiji
  • 21 K Bahamas
  • 20 K Congo, Democratic Republic
  • 18 K Suriname
  • 18 K Guyana
  • 17 K Tajikistan
  • 17 K Maldives
  • 16 K Botswana
  • 16 K Gabon
  • 14 K Rwanda
  • 13 K Burkina Faso
  • 12 K Belize
  • 12 K Congo
  • 12 K Benin
  • 11 K Uganda
  • 10 K Mali
  • 9.7 K Cape Verde
  • 8.9 K Togo
  • 8 K Bhutan
  • 7.9 K Uzbekistan
  • 7.7 K Myanmar
  • 7.5 K Saint Vincent And Grenadines
  • 6.7 K Niger
  • 6.7 K Malawi
  • 6.6 K Andorra
  • 5.8 K China
  • 5.8 K Antigua And Barbuda
  • 5.3 K Djibouti
  • 4.9 K Virgin Islands, U.S.
  • 4 K Seychelles
  • 3.9 K Gibraltar
  • 3.2 K Cuba
  • 1.7 K Somalia
  • 1.6 K Turkmenistan
  • 1.2 K Papua New Guinea
  • 934 Jersey
  • 874 Sierra Leone
  • 759 Isle Of Man
  • 605 Lesotho
  • 461 Guernsey
  • 386 Gambia
  • 304 Liechtenstein
  • 226 Greenland
  • 202 Timor-Leste
  • 200 Burundi
  • 198 Chad
  • 104 Dominica
  • 102 San Marino
  • 77 Virgin Islands, British
  • 74 Samoa
  • 64 Solomon Islands
  • 62 American Samoa
  • 56 Vanuatu
  • 34 Sao Tome And Principe
  • 31 Tonga
  • 25 Central African Republic
  • 23 Anguilla
  • 23 Cook Islands
  • 23 Micronesia, Federated States Of
  • 8 Saint Helena
  • 1 Montserrat
Show more