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Ahrefs in numbers
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 biggest third party database of search queries with refined monthly search volume and advanced keyword research metrics.
Browse this page to explore the scale of data that powers Ahrefs marketing tools.
Content index
Our content index is basically a mini search engine. You can search for any word and we'll return all pages, mentioning that word with our useful SEO metrics attached to them.
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Every 24 hours we discover1.8 million new pages
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Every 24 hours we update metrics for72 million pages
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Total content index size967 million pages
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Full updateEvery month
Keyword indexes
We operate two independent keyword indexes. The larger one (6.1 billion) is used for studying search patterns of internet users (via Keywords Explorer). The smaller one (528 million) is used for researching the search queries that websites rank for in organic search results (via Site Explorer).
Keywords explorer
6.1 billion keywords
- 2,351,416,387 United States
- 460,034,634 Brazil
- 310,203,660 France
- 266,859,497 United Kingdom
- 158,720,309 Poland
- 158,641,134 Germany
- 157,705,283 Spain
- 136,427,872 Italy
- 127,130,917 Russian Federation
- 121,240,428 Mexico
- 113,144,852 Canada
- 101,856,062 Argentina
- 95,873,621 India
- 93,121,690 Colombia
- 92,068,555 Japan
- 82,170,059 Australia
- 68,542,854 Ukraine
- 53,175,383 Indonesia
- 51,080,050 Chile
- 47,989,535 Turkey
- 44,915,522 Venezuela
- 42,209,974 Czech Republic
- 41,258,175 Philippines
- 39,182,786 Taiwan
- 37,661,616 Belgium
- 36,921,268 Netherlands
- 36,618,383 Peru
- 32,735,982 Hungary
- 31,792,968 Greece
- 30,189,825 Ecuador
- 26,791,966 Romania
- 26,602,727 Finland
- 25,068,575 Viet Nam
- 24,914,028 Pakistan
- 22,969,733 Portugal
- 22,551,305 Egypt
- 22,464,809 Sweden
- 22,227,508 Malaysia
- 22,005,550 Algeria
- 20,435,957 Morocco
- 20,355,159 Norway
- 18,362,273 Korea
- 17,871,533 Austria
- 17,686,634 New Zealand
- 17,664,295 South Africa
- 16,873,587 Switzerland
- 16,076,186 Serbia
- 15,274,488 Bulgaria
- 15,218,022 Slovakia
- 14,656,235 Denmark
- 13,748,086 Saudi Arabia
- 12,290,984 Croatia
- 12,115,243 Belarus
- 11,649,666 Bolivia
- 11,267,524 Uruguay
- 11,107,444 Hong Kong
- 10,471,021 Tunisia
- 10,451,789 Israel
- 10,231,761 Kazakhstan
- 10,012,171 Thailand
- 9,998,215 Ireland
- 9,601,469 Singapore
- 9,546,393 Dominican Republic
- 8,654,337 Costa Rica
- 7,800,373 Lithuania
- 7,364,587 Slovenia
- 6,696,372 Sri Lanka
- 6,674,096 Guatemala
- 6,447,507 Bangladesh
- 5,860,674 United Arab Emirates
- 5,603,563 Bosnia & Herzegovina
- 5,392,001 Latvia
- 5,348,623 El Salvador
- 5,185,811 Panama
- 4,961,660 Paraguay
- 4,917,735 Estonia
- 4,800,298 Moldova
- 4,794,638 Nigeria
- 3,954,493 Honduras
- 3,411,783 Azerbaijan
- 3,048,812 Armenia
- 2,756,635 Puerto Rico
- 2,631,260 Kenya
- 2,357,324 Jordan
- 2,338,787 Reunion
- 2,277,147 Nicaragua
- 2,274,282 Mauritius
- 2,273,264 Iraq
- 2,262,820 Trinidad And Tobago
- 2,259,828 Macedonia
- 2,245,913 Georgia
- 1,903,670 Jamaica
- 1,892,153 Palestinian Territory
- 1,658,011 Ghana
- 1,411,664 Albania
- 1,402,584 Malta
- 1,330,346 Qatar
- 1,247,448 Nepal
- 1,237,461 Madagascar
- 1,225,665 Cyprus
- 1,224,929 Lebanon
- 1,180,749 Luxembourg
- 1,139,544 Cote D'Ivoire
- 1,132,016 Cameroon
- 1,074,633 Kuwait
- 1,068,394 Oman
- 951,762 Senegal
- 928,060 Montenegro
- 927,248 Iceland
- 918,594 Angola
- 908,506 Guadeloupe
- 842,423 Martinique
- 767,806 Cambodia
- 760,716 Zimbabwe
- 760,173 Yemen
- 748,375 Bahrain
- 731,710 Kyrgyzstan
- 730,872 Tanzania
- 668,049 New Caledonia
- 655,957 Mozambique
- 638,143 Libya
- 553,683 Mongolia
- 492,003 Ethiopia
- 420,593 Brunei Darussalam
- 420,520 French Polynesia
- 417,633 French Guiana
- 400,410 Zambia
- 382,094 Namibia
- 381,618 Guyana
- 368,969 Haiti
- 337,605 Fiji
- 270,302 Botswana
- 265,248 Belize
- 263,624 Afghanistan
- 262,808 Bahamas
- 246,148 Gabon
- 242,416 Congo, Democratic Republic
- 232,434 Maldives
- 215,026 Mayotte
- 192,895 Cape Verde
- 192,563 Suriname
- 175,011 Guam
- 153,590 Saint Lucia
- 147,134 Andorra
- 144,651 Benin
- 136,878 Rwanda
- 136,105 Antigua And Barbuda
- 127,080 Saint Vincent And Grenadines
- 120,116 Laos
- 116,058 Burkina Faso
- 114,252 Tajikistan
- 111,142 Aruba
- 102,467 Grenada
- 94,647 Djibouti
- 90,716 Congo
- 88,700 Togo
- 88,293 Malawi
- 81,893 Guinea
- 81,805 Mauritania
- 79,781 Monaco
- 76,309 Saint Kitts And Nevis
- 73,231 Bhutan
- 71,716 Cayman Islands
- 70,745 Seychelles
- 67,260 Mali
- 64,889 Faroe Islands
- 57,716 Virgin Islands, U.S.
- 47,042 Gibraltar
- 36,040 Niger
- 19,017 Equatorial Guinea
Site explorer
528 million keywords
- 166,061,843 United States
- 26,056,082 Japan
- 22,779,615 France
- 20,280,926 United Kingdom
- 20,190,130 Germany
- 18,238,270 India
- 17,663,557 Brazil
- 17,272,772 Canada
- 16,116,971 Australia
- 15,155,525 Italy
- 14,205,876 Russian Federation
- 11,850,009 Mexico
- 11,631,020 Spain
- 11,130,370 Turkey
- 10,975,813 Poland
- 9,161,619 Indonesia
- 6,428,384 Argentina
- 6,316,771 Netherlands
- 5,980,178 Ukraine
- 5,562,692 Viet Nam
- 5,468,785 Colombia
- 3,795,544 Sweden
- 3,665,074 Taiwan
- 3,454,843 Philippines
- 3,044,613 Chile
- 2,665,246 Thailand
- 2,662,437 Venezuela
- 2,590,952 Peru
- 2,548,632 Austria
- 2,525,748 Greece
- 2,482,110 Czech Republic
- 2,464,908 Belgium
- 2,382,587 Denmark
- 2,311,849 Hungary
- 2,253,984 Egypt
- 2,235,083 Pakistan
- 2,172,560 Malaysia
- 2,098,871 Romania
- 2,033,260 Korea
- 1,989,305 Israel
- 1,867,597 Algeria
- 1,831,288 Finland
- 1,689,785 Saudi Arabia
- 1,645,035 Norway
- 1,642,834 Singapore
- 1,641,550 South Africa
- 1,629,964 Portugal
- 1,603,937 Ecuador
- 1,518,483 Hong Kong
- 1,479,950 Morocco
- 1,431,808 Switzerland
- 1,208,489 New Zealand
- 1,143,089 Bulgaria
- 1,052,362 Serbia
- 1,025,298 Slovakia
- 869,865 Kazakhstan
- 865,716 Ireland
- 840,493 Croatia
- 763,298 Belarus
- 686,171 United Arab Emirates
- 613,382 Tunisia
- 599,330 Uruguay
- 581,599 Bangladesh
- 580,468 Dominican Republic
- 564,582 Bolivia
- 560,908 Sri Lanka
- 548,627 Lithuania
- 488,612 Costa Rica
- 480,755 Slovenia
- 445,334 Guatemala
- 414,101 Nigeria
- 397,054 Iraq
- 367,941 Azerbaijan
- 363,640 Bosnia & Herzegovina
- 324,427 Latvia
- 300,447 Panama
- 291,829 El Salvador
- 288,193 Estonia
- 269,219 Kenya
- 265,600 Moldova
- 260,631 Paraguay
- 250,178 Jordan
- 237,751 Armenia
- 231,607 Puerto Rico
- 226,236 Georgia
- 223,560 Honduras
- 154,015 Palestinian Territory
- 153,051 Qatar
- 151,666 Ghana
- 145,758 Macedonia
- 139,331 Nicaragua
- 137,618 Jamaica
- 137,097 Trinidad And Tobago
- 131,317 Lebanon
- 127,680 Kuwait
- 120,026 Mauritius
- 115,769 Oman
- 115,694 Albania
- 113,469 Nepal
- 97,907 Cote D'Ivoire
- 93,756 Tanzania
- 93,564 Cyprus
- 80,424 Malta
- 79,516 Cameroon
- 78,778 Kyrgyzstan
- 78,447 Senegal
- 77,400 Luxembourg
- 75,777 Cambodia
- 67,900 Bahrain
- 66,063 Libya
- 64,948 Angola
- 63,250 Iceland
- 59,426 Mozambique
- 56,070 Montenegro
- 56,028 Guadeloupe
- 52,598 Zimbabwe
- 52,424 Mongolia
- 51,434 Madagascar
- 48,821 Ethiopia
- 30,988 Haiti
- 29,292 Zambia
- 27,927 Brunei Darussalam
- 27,876 Namibia
- 26,247 Afghanistan
- 20,785 Guyana
- 20,680 Bahamas
- 20,093 Congo, Democratic Republic
- 19,838 Fiji
- 18,945 Maldives
- 18,917 Laos
- 17,728 Tajikistan
- 17,357 Suriname
- 16,237 Botswana
- 16,025 Gabon
- 13,161 Belize
- 12,878 Burkina Faso
- 12,592 Rwanda
- 11,266 Benin
- 10,792 Congo
- 10,626 Cape Verde
- 10,118 Mali
- 7,922 Togo
- 7,619 Saint Vincent And Grenadines
- 7,383 Andorra
- 7,245 Bhutan
- 6,216 Antigua And Barbuda
- 6,177 Malawi
- 6,070 Niger
- 5,468 Djibouti
- 4,635 Virgin Islands, U.S.
- 3,736 Seychelles
- 3,563 Gibraltar
- 5 New Caledonia
- 2 Mauritania
- 1 Monaco
Backlink index
Ahrefs boasts the world's largest index of live backlinks that is updated with fresh data every 15-30 minutes. We use this backlink data to calculate our proprietary metrics: Ahrefs Rank, Domain Rating & URL Rating.
Domains (POST-VETTING)Server fleet
Above anything, 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.
2.5K Servers
- 38,000 CPU cores
- 256TB RAM
- 25PB HDD
- 2.5PB SSD