Top 30 SEO Link Authority Websites Worldwide

At the heart of SEO is the fact that search engines use the quantity, context and quality of links pointing to a web page when ranking it for a keyword. This helps them determine how important the site is and what it’s about.

Since links are so important, it’s interesting to analyse which websites have the most links. It’s particularly interesting to compare link authority data with our perceptions about which sites are more popular, important on the web.

Below is a table ranking the global top 30 websites according to the number of inbound links they have – particularly those with the greatest number of separate domains linking to them.

Theoretically these should have the highest basic SEO authority in the world. On-page content, social media signals and many other factors also affect rankings. But as the world’s leading authority sites it’s reasonable to expect that the sites at the top of the list should be able to rank in Google for just about anything.

Did you know that Twitter – not Google – has the highest link authority site on the web?

Some of this data might surprise you…

Domain Linking domains Overall Links Description
Twitter.com 1,350,000 116,890,000 Microblogging platform and the world’s second most popular social network. Many sites link to their Twitter feed
Google.com 872,000 47,620,000 Google’s main homepage
Yahoo.com 452,000 23,280,000 Was the biggest search engine before Google’s dominance. Now merging with Bing
Baidu.com 308,000 16,750,000 China’s top search engine – China has the world’s largest population (more than 4 times more people than USA)
WordPress.com 211,000 14,340,000 The most popular blogging platform
Blogger.com 210,000 7,280,000 Google’s blogging platform
Amazon.com 207,000 5,430,000 Online retailer that began life selling books
Youtube.com 204,000 5,960,000 The most popular video-sharing social network – owned by Google
Bing.com 150,000 3,190,000 Microsoft’s search engine and rival to Google
Adobe.com 132,000 4,420,000 Provides Flash for online video and reader software for PDF documents – both are popular and frequently linked to.
Taobao.com 108,000 3,140,000 A leading consumer-to-consumer marketplace
Microsoft.com 102,000 1,679,000 Microsoft global homepage
sina.com.cn 97,081 3,580,000 China’s leading web analytics provider
Linkedin.com 88,349 2,720,000 The leading professional networking website
Sohu.com 87,309 3,270,000 Chinese search engine
CNN.com 85,057 2,580,000 The leading global news provider (US-based)
Ebay.com 83,948 2,130,000 The world’s most popular auction site (peer-to-peer)
PayPal.com 83,886 2,760,000 The world’s most popular peer-to-peer payment system. Websites using PayPal often link to the site
163.com 81,974 3,340,000 Leading Chinese web portal
Apple.com 76,271 1,220,000 Apple homepage
Facebook.com 75,988 2,040,000 Homepage of one of the world’s most popular social networking sites
Wikipedia.org 74,819 1,700,000 User-edited (wiki) encyclopedia
Yahoo.co.jp 74,434 2,750,000 Yahoo’s Japan homepage
Tumblr.com 63,302 4,390,000 A leading blogging platform
Qq.com 62,995 2,280,000 China’s biggest web portal
Google.co.jp 62,483 3,300,000 Google’s Japan homepage
Msn.com 58,029 1,520,000 Microsoft Network homepage – used to be the default homepage for Windows computers
Google.de 53,443 1,120,000 Google Germany
BBC.co.uk 46,182 1,100,000 Leading provider of news, entertainment and information – ad free – to the UK and the world. Funded by UK TV owners
Imdb.com 45,887 1,320,000 Movie database



Domains are listed in strict order of authority – with the highest authority sites at the top. Authority is based primarily on the number of linking domains. 10 links from 10 domains typically represent more SEO value than 10 links all from the same domain.

Perhaps most interesting of all is that based on this data Twitter is the most authoritative site on the web. Perhaps this is in part because many businesses and individuals link to their Twitter feed from their website.

Of course SEO is about much more than just links and domain authority – but link-based metrics are among the most important SEO factors and they do tend to correlate well with rankings. Based on the enormity of Twitter’s link authority alone, pages on the Twitter.com domain might be expected to rank far better in Google than they actually do, for a wide range of terms. Do tweets simply not represent enough content to rank well? That seems likely and might explain why Wikipedia tends to rank far better than Twitter. (Could Google actually be suppressing Twitter URLs? I’ve seen other anecdotal evidence that this may indeed be the case and it may be worthy of further research).


Yahoo!
Yahoo! comes third – way ahead of Bing and Facebook – which is also something of a surprise at first. But it’s a much older domain. It’s been a major part of the web for much longer and at for quite some time was the most popular site on the web.

Baidu

Baidu coming fourth in the link popularity chart is a reminder that China is the next global superpower – soon to overtake the USA to become the world’s richest and most economically active nation. If China is emerging as the most important country in the world then Baidu is also becoming the most important search engine in a global context. It’s the fourth highest authority in the world according to this data, and I expect it to rise to the top of the list by 2015.

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1 thought on “Top 30 SEO Link Authority Websites Worldwide

  1. I Follow different SEO expert time to time but I believe SEO is more than reading. Its actually doing and getting good quality and relevant backlinks. Its really amazed me when i start getting relevant links. Results are awesome once you start getting quality links fast. Thanks for your Quality Blog.

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