The latest ‘SEO Book’ blog post is titled “Comparing Backlink Data Providers”.

Rob Kerry says, “Since Ayima launched in 2007, we’ve been crawling the web and building our own independent backlink data. Starting off with just a few servers running in our Directory of Technology’s bedroom cupboard, we now have over 130 high-spec servers hosted across 2 in-house server rooms and 1 datacenter, using a similar storage platform as Yahoo’s former index.

Crawling the entire web still isn’t easy (or cheap) though, which is why very few data providers exist even today. Each provider makes compromises (even Google does in some ways), in order to keep their data as accurate and useful as possible for their users”.

Comparing Backlink Data Providers

‘SEO Book’ Blog

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