The data used to generate the information below was collected by the Nielsen company and covers the UK, France, Germany, Italy, Spain, Switzerland, Brazil, US and Australia. The figures represent unique users for the month of January 2010.
The categories were defined by the BBC – such as retail, social networks, search/portal.
| brand | category (BBC defined) | unique_audience | total visits |
| Search/portal | 349758716 | 8169550654 | |
| MSN/WindowsLive/Bing | Search/portal | 271929865 | 5669443547 |
| Yahoo! | Search/portal | 233479611 | 4154504780 |
| Microsoft | Software | 220410208 | 1457071144 |
| Social network | 218860914 | 4553369332 | |
| YouTube | Video | 203258182 | 1261959101 |
| Wikipedia | Reference | 154174390 | 677773339 |
| AOL | Search/portal | 128146575 | 1798928826 |
| eBay | Retail | 121740943 | 1136621952 |
| Apple | Computer | 119232527 | 784462899 |
| Amazon | Retail | 111945278 | 498783008 |
| Blogger | Blogging | 110738193 | 509238135 |
| Ask | Search/portal | 100846108 | 471100728 |
| Fox Interactive Media | Media/news | 92899123 | 623816316 |
| Mozilla | Software | 67949332 | 164320932 |
| Real Network | Software | 61513698 | 337871469 |
| Adobe | Software | 53002496 | 98997677 |
| About | Reference | 52543328 | 120546354 |
| PayPal | Financial | 48552302 | 183121758 |
| WordPress | Blogging | 48538401 | 131518828 |
| Weather Channel | Weather | 47048043 | 381890539 |
| Glam Media | Media/news | 46723050 | 144259535 |
| CNN | Media/news | 44437129 | 315237473 |
| Social network | 42138681 | 260435459 | |
| Skype | Voip | 39220786 | 494959820 |
| CBS | Media/news | 38520325 | 102607440 |
| IMDb | Reference | 37717190 | 118408023 |
| Wal-Mart | Retail | 35538645 | 95283768 |
| Craigslist | Retail | 35537183 | 276230288 |
| BBC | Media/news | 35013985 | 313317910 |
| Terra | Portal | 33824315 | 294547251 |
| CNET | Tech news | 33647272 | 70218339 |
| Orange | Portal | 31807197 | 504188450 |
| Disney Online | Portal | 31394500 | 97511302 |
| AT&T | Portal | 30219046 | 121777665 |
| NetShelter Technology | Tech news | 29821347 | 80556448 |
| Flickr | Photo sharing | 29549675 | 75195354 |
| Picasa | Photo sharing | 29118829 | 146136670 |
| Gorilla Nation Websites | Commerce | 29101945 | 81010902 |
| WikiAnswers | Reference | 28825267 | 55624173 |
| Orkut | Social network | 28419073 | 540847650 |
| Chase | Financial | 28042086 | 155093978 |
| UOL | Portal | 27726174 | 352124785 |
| Bank of America | Financial | 27125408 | 170165875 |
| eHow | Reference | 27053378 | 50414385 |
| Livejasmin | Adult | 26761654 | 96824235 |
| ESPN | Media/news | 26609162 | 228211456 |
| Zynga | Gaming | 25299710 | 358649577 |
| Shopzilla | Retail | 25098444 | 41706202 |
| Comcast | Media/news | 25051539 | 340120690 |
| Videolan | Software | 24850138 | 199590815 |
| Everyday Health Network | Health | 24555867 | 71384459 |
| Social network | 24389451 | 82906101 | |
| Expedia | Travel | 24143300 | 57417887 |
| iG | Financial | 24084472 | 193112915 |
| Target | Retail | 23366341 | 53819711 |
| Dell | Computer | 23324607 | 93176142 |
| Globo | Media/news | 23255841 | 281075741 |
| Scripps Networks Digital | Media/news | 23138504 | 97937419 |
| NYTimes | Media/news | 23004157 | 86938080 |
| LimeWire | File sharing | 22713814 | 191014302 |
| WebMD | Health | 22642174 | 50971280 |
| FriendFinder Network | Online dating | 22603720 | 61860369 |
| Shopping.com | Retail | 22504692 | 35849309 |
| Nickelodeon Kids and Family Network | Children | 22409321 | 83215007 |
| Classmates Online | Social network | 22199901 | 83568349 |
| Netflix | Video | 22008309 | 106270947 |
| Meebo | Social network | 21887117 | 86427247 |
| Six Apart | Blogging | 21380991 | 77070983 |
| Turner Sports & Entertainment Digital Network | Media/news | 21098211 | 70720772 |
| Comcast | Media/news | 20733129 | 58431587 |
| Hewlett Packard | Computer | 20721035 | 49312762 |
| NexTag | Retail | 20661472 | 33065309 |
| NBC Universal | Media/news | 20658373 | 61299754 |
| Conduit | Software | 20610183 | 124096743 |
| Verizon | Portal | 20579538 | 137321487 |
| TripAdvisor | Travel | 20548555 | 44345553 |
| Best Buy | Retail | 20074265 | 45170125 |
| Monster | Recruitment | 19416161 | 58285314 |
| RTL Network | Media/news | 19290418 | 158214651 |
| Priceline Network | Retail | 18956830 | 39405792 |
| Experian | Financial | 18645754 | 32564123 |
| Pornhub | Adult | 18511983 | 85677157 |
| iVillage | Portal | 18347399 | 52984051 |
| UPS | Commerce | 18220154 | 64947284 |
| SuperPages | Reference | 18077680 | 35599994 |
| Fox News | Media/news | 18061048 | 110993269 |
| NFL | Sport | 18060741 | 66811375 |
| Dailymotion | Video | 17832095 | 42856313 |
| T-Online | Portal | 17740389 | 254279320 |
| Reed Business Information Network | Media/news | 17588470 | 31740628 |
| Free | Retail | 17573040 | 126239473 |
| Citibank | Financial | 17441648 | 68902194 |
| Vistaprint | Commerce | 17426001 | 40076740 |
| Sears | Retail | 17191100 | 33470558 |
| Tribune Newspapers | Media/news | 17036257 | 59439576 |
| Electronic Arts Online | Gaming | 16580304 | 158185607 |
| Megaupload | File storage | 16395294 | 75813535 |
| Vodafone | Portal | 16316860 | 82765976 |
| Geeknet | Forum | 16270479 | 63750971 |
