We're hiring data scientist!
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.
-
Every 24 hours we discover1.8 million new pages
-
Every 24 hours we update metrics for72 million pages
-
Total content index size994 million pages
-
Full updateEvery month
Keyword indexes
We operate two independent keyword indexes. The larger one (7 billion) is used for studying search patterns of internet users (via Keywords Explorer). The smaller one (507 million) is used for researching the search queries that websites rank for in organic search results (via Site Explorer).
Keywords explorer
7 billion keywords
- 2,895,029,439 United States
- 494,547,545 Brazil
- 330,158,585 France
- 308,785,546 United Kingdom
- 177,226,925 Germany
- 172,447,104 Spain
- 168,793,628 Poland
- 151,556,312 Italy
- 133,344,444 Russian Federation
- 130,640,247 Mexico
- 129,841,601 Canada
- 113,014,431 Argentina
- 106,422,655 Japan
- 105,729,060 India
- 98,546,099 Colombia
- 94,184,525 Australia
- 72,850,702 Ukraine
- 56,864,403 Indonesia
- 55,127,347 Chile
- 53,254,120 Turkey
- 47,389,879 Venezuela
- 46,247,222 Czech Republic
- 45,136,257 Philippines
- 43,551,901 Netherlands
- 42,034,944 Taiwan
- 40,898,937 Belgium
- 39,397,799 Peru
- 35,135,366 Hungary
- 34,817,823 Greece
- 32,173,846 Ecuador
- 28,675,777 Romania
- 28,571,868 Finland
- 26,346,013 Viet Nam
- 26,058,661 Pakistan
- 25,442,027 Portugal
- 24,953,577 Sweden
- 24,586,348 Egypt
- 24,248,677 Malaysia
- 22,823,175 Algeria
- 22,140,510 Norway
- 21,548,742 Morocco
- 20,498,818 South Africa
- 20,015,464 Thailand
- 19,858,404 Austria
- 19,712,581 New Zealand
- 19,428,300 Korea
- 18,340,074 Switzerland
- 17,327,957 Serbia
- 16,436,586 Slovakia
- 16,393,529 Denmark
- 16,208,764 Bulgaria
- 14,789,907 Saudi Arabia
- 13,328,926 Croatia
- 12,820,088 Bolivia
- 12,794,957 Belarus
- 12,771,184 Hong Kong
- 12,639,068 Israel
- 12,331,424 Uruguay
- 11,672,340 Ireland
- 11,121,202 Singapore
- 10,999,688 Tunisia
- 10,636,859 Kazakhstan
- 10,273,972 Dominican Republic
- 9,654,073 Costa Rica
- 8,342,765 Lithuania
- 7,859,233 Slovenia
- 7,403,324 Guatemala
- 7,270,231 Sri Lanka
- 7,121,278 Bangladesh
- 6,514,214 United Arab Emirates
- 5,977,324 Bosnia & Herzegovina
- 5,958,345 Panama
- 5,845,091 El Salvador
- 5,754,410 Latvia
- 5,551,964 Nigeria
- 5,483,894 Paraguay
- 5,301,339 Estonia
- 4,999,913 Moldova
- 4,353,222 Honduras
- 3,569,055 Azerbaijan
- 3,174,533 Armenia
- 3,171,222 Kenya
- 3,091,483 Puerto Rico
- 2,836,081 Trinidad And Tobago
- 2,681,307 Jordan
- 2,645,861 Mauritius
- 2,505,979 Reunion
- 2,450,277 Nicaragua
- 2,438,744 Macedonia
- 2,359,133 Georgia
- 2,349,687 Jamaica
- 2,250,475 Iraq
- 1,956,013 Palestinian Territory
- 1,914,706 Ghana
- 1,585,510 Malta
- 1,540,781 Albania
- 1,492,025 Qatar
- 1,482,450 Cyprus
- 1,474,764 Lebanon
- 1,427,592 Nepal
- 1,406,666 Zimbabwe
- 1,332,508 Madagascar
- 1,311,774 Luxembourg
- 1,281,583 Cote D'Ivoire
- 1,261,029 Cameroon
- 1,258,795 Kuwait
- 1,191,756 Oman
- 1,057,577 Senegal
- 1,019,811 Angola
- 1,001,190 Iceland
- 986,017 Montenegro
- 973,188 Guadeloupe
- 912,168 Martinique
- 863,879 Yemen
- 856,483 Cambodia
- 838,378 Tanzania
- 838,273 Bahrain
- 779,631 Kyrgyzstan
- 725,565 Mozambique
- 705,971 New Caledonia
- 693,221 Libya
- 586,773 Mongolia
- 534,419 Ethiopia
- 474,903 Zambia
- 456,393 Brunei Darussalam
- 455,748 Namibia
- 449,198 French Polynesia
- 443,702 French Guiana
- 442,730 Haiti
- 420,000 Fiji
- 416,652 Guyana
- 320,216 Belize
- 319,794 Botswana
- 304,737 Bahamas
- 284,702 Gabon
- 276,492 Afghanistan
- 261,365 Congo, Democratic Republic
- 251,003 Maldives
- 228,015 Mayotte
- 222,754 Suriname
- 218,375 Cape Verde
- 208,015 Guam
- 175,617 Saint Lucia
- 164,754 Antigua And Barbuda
- 160,215 Benin
- 159,474 Andorra
- 158,176 Rwanda
- 151,019 Laos
- 138,335 Saint Vincent And Grenadines
- 130,948 Burkina Faso
- 129,254 Aruba
- 118,134 Tajikistan
- 113,587 Grenada
- 100,466 Togo
- 99,963 Djibouti
- 98,099 Malawi
- 97,751 Congo
- 88,797 Mauritania
- 84,845 Monaco
- 84,277 Guinea
- 82,759 Saint Kitts And Nevis
- 80,053 Cayman Islands
- 79,688 Bhutan
- 79,378 Seychelles
- 75,014 Mali
- 69,546 Faroe Islands
- 62,236 Virgin Islands, U.S.
- 53,055 Gibraltar
- 41,470 Niger
- 20,604 Equatorial Guinea
Site explorer
507 million keywords
- 166,056,171 United States
- 26,077,381 Japan
- 22,784,842 France
- 20,284,956 United Kingdom
- 20,195,999 Germany
- 18,250,100 India
- 17,676,885 Brazil
- 17,122,422 Canada
- 16,119,027 Australia
- 13,444,721 Italy
- 12,180,827 Russian Federation
- 11,852,297 Mexico
- 11,144,824 Turkey
- 10,344,301 Spain
- 9,339,491 Poland
- 9,168,224 Indonesia
- 6,429,769 Argentina
- 5,981,332 Ukraine
- 5,892,035 Netherlands
- 5,459,399 Colombia
- 4,816,926 Viet Nam
- 3,799,687 Sweden
- 3,670,200 Taiwan
- 3,461,490 Philippines
- 3,043,050 Chile
- 2,804,765 Thailand
- 2,505,697 Austria
- 2,496,108 Venezuela
- 2,382,972 Czech Republic
- 2,338,111 Peru
- 2,287,893 Denmark
- 2,261,422 Greece
- 2,190,209 Belgium
- 2,007,731 Hungary
- 1,951,652 Egypt
- 1,882,273 Israel
- 1,859,219 Pakistan
- 1,788,933 Malaysia
- 1,709,317 Romania
- 1,605,433 Korea
- 1,547,456 Singapore
- 1,515,469 Norway
- 1,440,349 Finland
- 1,415,830 Algeria
- 1,406,480 Hong Kong
- 1,229,267 South Africa
- 1,222,847 Portugal
- 1,211,595 Saudi Arabia
- 1,168,847 New Zealand
- 1,167,350 Ecuador
- 1,022,853 Switzerland
- 992,815 Morocco
- 813,323 Bulgaria
- 742,775 Serbia
- 728,607 Slovakia
- 642,255 Ireland
- 598,319 Croatia
- 539,193 Kazakhstan
- 514,141 Belarus
- 496,562 United Arab Emirates
- 414,220 Uruguay
- 392,333 Bolivia
- 391,157 Dominican Republic
- 387,836 Bangladesh
- 386,655 Tunisia
- 384,020 Lithuania
- 383,490 Sri Lanka
- 347,180 Costa Rica
- 335,698 Slovenia
- 317,084 Guatemala
- 309,636 Nigeria
- 243,429 Azerbaijan
- 242,522 Iraq
- 236,077 Bosnia & Herzegovina
- 225,842 Latvia
- 223,278 Panama
- 213,728 Estonia
- 210,997 Kenya
- 205,252 El Salvador
- 185,168 Paraguay
- 173,724 Jordan
- 173,503 Moldova
- 165,040 Puerto Rico
- 159,273 Honduras
- 154,150 Armenia
- 147,977 Georgia
- 113,528 Ghana
- 112,148 Trinidad And Tobago
- 111,431 Jamaica
- 104,233 Palestinian Territory
- 103,289 Qatar
- 100,992 Macedonia
- 98,131 Lebanon
- 94,147 Nicaragua
- 94,125 Kuwait
- 92,219 Mauritius
- 86,375 Nepal
- 81,116 Albania
- 73,982 Cyprus
- 73,253 Oman
- 68,871 Tanzania
- 68,772 Cote D'Ivoire
- 62,016 Malta
- 55,899 Luxembourg
- 55,749 Cameroon
- 55,121 Kyrgyzstan
- 54,999 Senegal
- 53,269 Cambodia
- 46,815 Bahrain
- 46,753 Angola
- 45,998 Libya
- 45,989 Iceland
- 43,374 Guadeloupe
- 39,410 Zimbabwe
- 38,904 Montenegro
- 38,797 Mozambique
- 36,877 Madagascar
- 36,698 Mongolia
- 33,375 Ethiopia
- 23,110 Namibia
- 23,090 Haiti
- 21,788 Zambia
- 19,680 Brunei Darussalam
- 16,990 Afghanistan
- 16,988 Fiji
- 15,759 Bahamas
- 15,446 Laos
- 15,020 Guyana
- 14,746 Suriname
- 13,602 Congo, Democratic Republic
- 13,322 Maldives
- 13,129 Botswana
- 12,568 Gabon
- 12,321 Tajikistan
- 10,968 Rwanda
- 10,506 Belize
- 9,866 Burkina Faso
- 8,974 Congo
- 8,654 Cape Verde
- 8,587 Benin
- 7,940 Mali
- 6,994 Togo
- 6,512 Saint Vincent And Grenadines
- 6,253 Bhutan
- 6,066 Andorra
- 5,518 Antigua And Barbuda
- 5,364 Niger
- 5,036 Malawi
- 4,397 Djibouti
- 3,583 Virgin Islands, U.S.
- 3,158 Seychelles
- 2,983 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