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.

2400 Servers

  • 200K CPU cores
  • 900TB RAM
  • 30PB 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
    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
  • 73 M Indonesia
  • 71 M Turkey
  • 65 M Czechia
  • 64 M Netherlands
  • 63 M Philippines
  • 58 M Venezuela
  • 57 M Belgium
  • 56 M Taiwan
  • 54 M Peru
  • 48 M Greece
  • 47 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
  • 32 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
  • 9.8 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
  • 1.5 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
  • 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
  • 194 K Aruba
  • 194 K Burkina Faso
  • 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
  • 35 K Uganda
  • 30 K Equatorial Guinea
  • 29 K Syrian Arab Republic
  • 26 K Uzbekistan
  • 24 K Myanmar
  • 22 K China
  • 20 K Sudan
  • 11 K Cuba
  • 8.8 K Macao
  • 5.9 K Somalia
  • 5.7 K Turkmenistan
  • 4.2 K Papua New Guinea
  • 3.2 K Jersey
  • 2.9 K Sierra Leone
  • 2.8 K Liberia
  • 2.6 K Lesotho
  • 2.5 K Isle Of Man
  • 2 K Swaziland
  • 1.5 K Guernsey
  • 1.5 K Gambia
  • 1.1 K Bermuda
  • 1.1 K Liechtenstein
  • 999 Burundi
  • 900 Timor-Leste
  • 832 Greenland
  • 823 Chad
  • 570 Guinea-Bissau
  • 448 Aland Islands
  • 387 San Marino
  • 384 Northern Mariana Islands
  • 376 Dominica
  • 343 Turks And Caicos Islands
  • 284 Virgin Islands, British
  • 250 Samoa
  • 239 Central African Republic
  • 238 Solomon Islands
  • 212 American Samoa
  • 208 Vanuatu
  • 135 Saint Martin
  • 127 Tonga
  • 113 Comoros
  • 111 Sao Tome And Principe
  • 83 Micronesia, Federated States Of
  • 76 Saint Barthelemy
  • 74 Anguilla
  • 56 Saint Helena
  • 54 Eritrea
  • 48 Palau
  • 44 Cook Islands
  • 38 Marshall Islands
  • 24 Svalbard And Jan Mayen
  • 19 Montserrat
  • 18 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.

457 million keywords. 155 countries

  • 160 M United States
  • 27 M Japan
  • 20 M United Kingdom
  • 18 M Germany
  • 17 M India
  • 16 M Australia
  • 15 M Canada
  • 15 M France
  • 12 M Italy
  • 11 M Russian Federation
  • 11 M Turkey
  • 10 M Brazil
  • 9.4 M Indonesia
  • 9.3 M Spain
  • 8.3 M Mexico
  • 7 M Poland
  • 6 M Netherlands
  • 5.3 M Vietnam
  • 4.6 M Thailand
  • 4.6 M Ukraine
  • 3.9 M Argentina
  • 3.5 M Sweden
  • 2.9 M Colombia
  • 2.9 M Taiwan
  • 2.3 M Philippines
  • 2.3 M Austria
  • 2.2 M Denmark
  • 1.9 M Israel
  • 1.8 M Chile
  • 1.8 M Belgium
  • 1.7 M Egypt
  • 1.7 M Malaysia
  • 1.6 M Peru
  • 1.6 M Singapore
  • 1.6 M Czechia
  • 1.6 M Greece
  • 1.5 M Hong Kong
  • 1.5 M Norway
  • 1.5 M Korea
  • 1.4 M Romania
  • 1.4 M Pakistan
  • 1.4 M Hungary
  • 1.3 M Venezuela
  • 1.3 M Saudi Arabia
  • 1.2 M South Africa
  • 1.2 M New Zealand
  • 1.2 M Finland
  • 1.1 M Portugal
  • 1.1 M Switzerland
  • 1.1 M Algeria
  • 917 K Morocco
  • 900 K Ecuador
  • 791 K Bulgaria
  • 735 K Ireland
  • 701 K Serbia
  • 673 K Slovakia
  • 599 K United Arab Emirates
  • 572 K Kazakhstan
  • 565 K Croatia
  • 513 K Belarus
  • 427 K Bangladesh
  • 401 K Sri Lanka
  • 380 K Lithuania
  • 368 K Dominican Republic
  • 367 K Nigeria
  • 365 K Tunisia
  • 338 K Uruguay
  • 333 K Costa Rica
  • 332 K Bolivia
  • 312 K Slovenia
  • 301 K Iraq
  • 292 K Guatemala
  • 282 K Azerbaijan
  • 257 K Kenya
  • 233 K Bosnia & Herzegovina
  • 216 K Latvia
  • 213 K Jordan
  • 212 K Puerto Rico
  • 205 K Panama
  • 195 K Estonia
  • 181 K El Salvador
  • 175 K Paraguay
  • 171 K Georgia
  • 169 K Moldova
  • 147 K Armenia
  • 141 K Honduras
  • 132 K Ghana
  • 129 K Qatar
  • 128 K Kuwait
  • 127 K Lebanon
  • 123 K Palestinian Territory
  • 114 K Jamaica
  • 110 K Trinidad And Tobago
  • 109 K Nepal
  • 103 K North Macedonia
  • 97 K Nicaragua
  • 93 K Tanzania
  • 93 K Oman
  • 90 K Cyprus
  • 88 K Albania
  • 85 K Mauritius
  • 79 K Côte d'Ivoire
  • 73 K Kyrgyzstan
  • 65 K Luxembourg
  • 64 K Malta
  • 63 K Senegal
  • 61 K Cambodia
  • 60 K Cameroon
  • 58 K Bahrain
  • 57 K Libya
  • 51 K Angola
  • 50 K Iceland
  • 50 K Mozambique
  • 47 K Mongolia
  • 47 K Zimbabwe
  • 45 K Guadeloupe
  • 45 K Montenegro
  • 44 K Ethiopia
  • 34 K Madagascar
  • 30 K Haiti
  • 29 K Zambia
  • 28 K Namibia
  • 24 K Brunei Darussalam
  • 22 K Laos
  • 21 K Afghanistan
  • 21 K Congo, Democratic Republic
  • 21 K Fiji
  • 20 K Bahamas
  • 18 K Suriname
  • 18 K Guyana
  • 18 K Tajikistan
  • 17 K Maldives
  • 16 K Botswana
  • 16 K Gabon
  • 14 K Uganda
  • 14 K Rwanda
  • 13 K Burkina Faso
  • 12 K Belize
  • 11 K Congo
  • 11 K Benin
  • 10 K Mali
  • 9.5 K Uzbekistan
  • 9.4 K Cape Verde
  • 9.1 K Myanmar
  • 8.7 K Togo
  • 8 K China
  • 7.8 K Bhutan
  • 7.3 K Saint Vincent And Grenadines
  • 6.7 K Niger
  • 6.7 K Malawi
  • 6.3 K Andorra
  • 5.6 K Antigua And Barbuda
  • 5.2 K Djibouti
  • 4.9 K Virgin Islands, U.S.
  • 4.3 K Cuba
  • 3.8 K Seychelles
  • 3.8 K Gibraltar
  • 2.1 K Somalia
  • 1.9 K Turkmenistan
  • 1.4 K Papua New Guinea
  • 1.1 K Jersey
  • 1 K Sierra Leone
  • 867 Isle Of Man
  • 704 Lesotho
  • 549 Guernsey
  • 443 Gambia
  • 372 Liechtenstein
  • 279 Greenland
  • 237 Burundi
  • 232 Timor-Leste
  • 231 Chad
  • 131 San Marino
  • 114 Dominica
  • 88 Virgin Islands, British
  • 86 Central African Republic
  • 71 American Samoa
  • 67 Solomon Islands
  • 64 Samoa
  • 49 Vanuatu
  • 43 Sao Tome And Principe
  • 25 Tonga
  • 24 Micronesia, Federated States Of
  • 19 Anguilla
  • 18 Cook Islands
  • 9 Saint Helena
  • 2 Montserrat
Show more