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.

2500 Servers

  • 200K CPU cores
  • 1PB+ RAM
  • 50PB HDD
  • 90PB 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
    420 million pages
  • Total content index size
    8.6 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.

11.8 billion keywords. 10 search engines. 229 countries.

  • Google
    9.6 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

11.8 billion keywords

  • 4 B United States
  • 638 M Brazil
  • 426 M France
  • 376 M United Kingdom
  • 248 M Germany
  • 233 M Spain
  • 220 M Poland
  • 207 M Italy
  • 177 M Mexico
  • 165 M Canada
  • 162 M Russian Federation
  • 161 M Japan
  • 156 M Argentina
  • 148 M India
  • 126 M Colombia
  • 118 M Australia
  • 98 M Ukraine
  • 75 M Indonesia
  • 74 M Chile
  • 73 M Turkey
  • 65 M Czechia
  • 65 M Netherlands
  • 63 M Philippines
  • 59 M Venezuela
  • 57 M Belgium
  • 57 M Taiwan
  • 55 M Peru
  • 48 M Greece
  • 48 M Hungary
  • 43 M Ecuador
  • 39 M Finland
  • 39 M Romania
  • 38 M Thailand
  • 36 M Portugal
  • 36 M Sweden
  • 34 M Malaysia
  • 33 M Pakistan
  • 33 M Egypt
  • 33 M Vietnam
  • 31 M South Africa
  • 28 M Austria
  • 28 M Korea
  • 27 M Switzerland
  • 27 M Norway
  • 26 M Algeria
  • 26 M Morocco
  • 24 M New Zealand
  • 24 M Denmark
  • 24 M Serbia
  • 23 M Slovakia
  • 21 M Bulgaria
  • 21 M Saudi Arabia
  • 20 M Israel
  • 19 M Hong Kong
  • 18 M Croatia
  • 18 M Ireland
  • 18 M Bolivia
  • 17 M Uruguay
  • 17 M Singapore
  • 16 M Belarus
  • 14 M Dominican Republic
  • 14 M Costa Rica
  • 14 M Tunisia
  • 13 M Kazakhstan
  • 11 M Lithuania
  • 11 M Slovenia
  • 11 M Guatemala
  • 10 M United Arab Emirates
  • 10 M Bangladesh
  • 9.6 M Sri Lanka
  • 8.6 M Nigeria
  • 8.5 M Panama
  • 8 M El Salvador
  • 7.9 M Bosnia & Herzegovina
  • 7.9 M Latvia
  • 7.8 M Paraguay
  • 7.5 M Estonia
  • 6.1 M Honduras
  • 6 M Moldova
  • 5.3 M Kenya
  • 4.7 M Azerbaijan
  • 4.6 M Puerto Rico
  • 4.2 M Trinidad And Tobago
  • 4 M Jordan
  • 3.8 M Armenia
  • 3.8 M Mauritius
  • 3.6 M Reunion
  • 3.5 M Jamaica
  • 3.5 M North Macedonia
  • 3.4 M Nicaragua
  • 3.2 M Georgia
  • 3 M Iraq
  • 2.9 M Ghana
  • 2.4 M Palestinian Territory
  • 2.3 M Malta
  • 2.3 M Lebanon
  • 2.3 M Cyprus
  • 2.3 M Nepal
  • 2.3 M Albania
  • 2.2 M Qatar
  • 1.9 M Kuwait
  • 1.9 M Luxembourg
  • 1.9 M Madagascar
  • 1.9 M Côte d'Ivoire
  • 1.8 M Oman
  • 1.8 M Cameroon
  • 1.6 M Senegal
  • 1.5 M Angola
  • 1.4 M Iceland
  • 1.4 M Guadeloupe
  • 1.4 M Montenegro
  • 1.3 M Martinique
  • 1.3 M Cambodia
  • 1.3 M Zimbabwe
  • 1.3 M Bahrain
  • 1.3 M Yemen
  • 1.2 M Tanzania
  • 1.1 M Kyrgyzstan
  • 979 K Libya
  • 974 K Mozambique
  • 945 K New Caledonia
  • 922 K Mongolia
  • 877 K Ethiopia
  • 734 K Zambia
  • 706 K Namibia
  • 668 K Haiti
  • 653 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
  • 383 K Congo, Democratic Republic
  • 358 K Afghanistan
  • 354 K Maldives
  • 334 K Suriname
  • 318 K Cape Verde
  • 309 K Guam
  • 305 K Mayotte
  • 280 K Rwanda
  • 277 K Laos
  • 274 K Saint Lucia
  • 251 K Antigua And Barbuda
  • 244 K Benin
  • 225 K Andorra
  • 221 K Burkina Faso
  • 199 K Myanmar
  • 194 K Aruba
  • 178 K Saint Vincent And Grenadines
  • 176 K Grenada
  • 167 K Togo
  • 159 K Tajikistan
  • 150 K Malawi
  • 141 K Congo
  • 131 K Djibouti
  • 123 K Bhutan
  • 123 K Seychelles
  • 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
  • 36 K Uganda
  • 30 K Equatorial Guinea
  • 30 K Syrian Arab Republic
  • 27 K Uzbekistan
  • 22 K China
  • 21 K Sudan
  • 12 K Cuba
  • 9 K Macao
  • 6.1 K Somalia
  • 5.8 K Turkmenistan
  • 4.3 K Papua New Guinea
  • 3.3 K Jersey
  • 3 K Sierra Leone
  • 2.9 K Liberia
  • 2.8 K Isle Of Man
  • 2.7 K Lesotho
  • 2.1 K Swaziland
  • 1.6 K Guernsey
  • 1.5 K Gambia
  • 1.2 K Liechtenstein
  • 1.1 K Bermuda
  • 1 K Burundi
  • 926 Timor-Leste
  • 857 Greenland
  • 849 Chad
  • 585 Guinea-Bissau
  • 464 Aland Islands
  • 406 San Marino
  • 393 Northern Mariana Islands
  • 390 Dominica
  • 350 Turks And Caicos Islands
  • 290 Virgin Islands, British
  • 265 Central African Republic
  • 257 Samoa
  • 248 Solomon Islands
  • 216 American Samoa
  • 214 Vanuatu
  • 137 Saint Martin
  • 131 Tonga
  • 117 Comoros
  • 114 Sao Tome And Principe
  • 81 Micronesia, Federated States Of
  • 79 Saint Barthelemy
  • 78 Anguilla
  • 56 Saint Helena
  • 55 Eritrea
  • 46 Palau
  • 44 Cook Islands
  • 39 Marshall Islands
  • 24 Svalbard And Jan Mayen
  • 19 Montserrat
  • 19 Saint Pierre And Miquelon
  • 13 Falkland Islands (Malvinas)
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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.

524 million keywords. 186 countries

  • 206 M United States
  • 28 M Japan
  • 21 M United Kingdom
  • 20 M India
  • 19 M Germany
  • 16 M Canada
  • 16 M Australia
  • 15 M France
  • 13 M Italy
  • 11 M Russian Federation
  • 11 M Turkey
  • 11 M Brazil
  • 10 M Indonesia
  • 9.9 M Spain
  • 8.9 M Mexico
  • 7.4 M Poland
  • 6.3 M Netherlands
  • 5.6 M Vietnam
  • 5 M Ukraine
  • 4.8 M Thailand
  • 4.4 M Argentina
  • 3.7 M Sweden
  • 3.3 M Colombia
  • 3.2 M Taiwan
  • 2.8 M Philippines
  • 2.4 M Austria
  • 2.3 M Denmark
  • 2.2 M Chile
  • 2.1 M Belgium
  • 2 M Malaysia
  • 2 M Israel
  • 1.9 M Egypt
  • 1.8 M Singapore
  • 1.8 M Czechia
  • 1.7 M Peru
  • 1.7 M Hong Kong
  • 1.7 M Greece
  • 1.7 M Pakistan
  • 1.6 M South Africa
  • 1.6 M Norway
  • 1.6 M Romania
  • 1.6 M Korea
  • 1.5 M Saudi Arabia
  • 1.5 M Hungary
  • 1.4 M Venezuela
  • 1.4 M Switzerland
  • 1.3 M Finland
  • 1.3 M New Zealand
  • 1.2 M Portugal
  • 1.2 M Algeria
  • 988 K Ecuador
  • 950 K Morocco
  • 877 K Ireland
  • 847 K Bulgaria
  • 809 K United Arab Emirates
  • 739 K Slovakia
  • 732 K Serbia
  • 622 K Kazakhstan
  • 608 K Croatia
  • 571 K Belarus
  • 552 K Bangladesh
  • 514 K Nigeria
  • 455 K Sri Lanka
  • 408 K Lithuania
  • 379 K Tunisia
  • 374 K Bolivia
  • 373 K Costa Rica
  • 367 K Dominican Republic
  • 351 K Uruguay
  • 341 K Guatemala
  • 330 K Kenya
  • 321 K Slovenia
  • 311 K Azerbaijan
  • 296 K Iraq
  • 244 K Jordan
  • 232 K Bosnia & Herzegovina
  • 223 K Latvia
  • 210 K Puerto Rico
  • 206 K Estonia
  • 205 K Panama
  • 203 K El Salvador
  • 194 K Paraguay
  • 174 K Ghana
  • 171 K Georgia
  • 169 K Moldova
  • 147 K Armenia
  • 141 K Honduras
  • 127 K Qatar
  • 126 K Kuwait
  • 125 K Lebanon
  • 122 K Palestinian Territory
  • 121 K Cyprus
  • 114 K Jamaica
  • 113 K North Macedonia
  • 110 K Trinidad And Tobago
  • 109 K Nepal
  • 106 K Nicaragua
  • 98 K Côte d'Ivoire
  • 91 K Oman
  • 91 K Tanzania
  • 88 K Albania
  • 85 K Cambodia
  • 85 K Mauritius
  • 80 K Bahrain
  • 78 K Cameroon
  • 76 K Senegal
  • 72 K Kyrgyzstan
  • 68 K Malta
  • 65 K Luxembourg
  • 63 K Angola
  • 55 K Libya
  • 50 K Iceland
  • 49 K Mozambique
  • 47 K Mongolia
  • 47 K Zimbabwe
  • 45 K Guadeloupe
  • 44 K Montenegro
  • 44 K Myanmar
  • 44 K Ethiopia
  • 34 K Madagascar
  • 29 K Haiti
  • 29 K Zambia
  • 28 K Namibia
  • 23 K Brunei Darussalam
  • 21 K Laos
  • 21 K Afghanistan
  • 21 K Congo, Democratic Republic
  • 21 K Fiji
  • 20 K Bahamas
  • 20 K Burkina Faso
  • 18 K Guyana
  • 18 K Suriname
  • 17 K Tajikistan
  • 17 K Maldives
  • 16 K Botswana
  • 15 K Gabon
  • 15 K Uganda
  • 14 K Rwanda
  • 11 K Belize
  • 11 K Congo
  • 11 K Benin
  • 10 K Mali
  • 9.7 K Uzbekistan
  • 9.3 K Cape Verde
  • 8.6 K China
  • 8.5 K Togo
  • 7.6 K Bhutan
  • 7.3 K Saint Vincent And Grenadines
  • 6.6 K Niger
  • 6.6 K Malawi
  • 6.3 K Andorra
  • 5.6 K Antigua And Barbuda
  • 5.1 K Djibouti
  • 4.8 K Virgin Islands, U.S.
  • 4.6 K Cuba
  • 3.8 K Seychelles
  • 3.8 K Gibraltar
  • 2.1 K Somalia
  • 2 K Turkmenistan
  • 1.5 K Papua New Guinea
  • 1.1 K Jersey
  • 1 K Sierra Leone
  • 876 Isle Of Man
  • 694 Lesotho
  • 546 Guernsey
  • 441 Gambia
  • 384 Liechtenstein
  • 289 Greenland
  • 238 Chad
  • 229 Burundi
  • 219 Timor-Leste
  • 136 San Marino
  • 113 Dominica
  • 104 Central African Republic
  • 86 Virgin Islands, British
  • 65 American Samoa
  • 65 Solomon Islands
  • 57 Samoa
  • 46 Vanuatu
  • 44 Sao Tome And Principe
  • 24 Tonga
  • 21 Micronesia, Federated States Of
  • 19 Anguilla
  • 19 Cook Islands
  • 10 Saint Helena
  • 1 Montserrat
Show more