Webmaster tools lists a large number (hundreds)of different domains linking to my website, but only a few are reported on SEOMoz. Please explain what's going on?

[dnfealkoff]

Google's webmaster tools lists hundreds of links to my site, but SEOMoz only reports a few of them.  I don't understand why that would be.  Can anybody explain it to me?  Is there someplace to I can go to alert SEOMoz to this issue?

[JamesNorquay]

Google has been crawling websites for a very long time, SEO moz has been crawling sites for only a few years.

The thing is Google also has access to all websites online, where as SEO moz's index whilst been great it is not complete.

My advice is if you are reporting link data to a client is to show SEO moz link data as a fresh index and Google Web master tools as a more complete index.

[RobertFisher]

Due to the scope of the Internet it takes a search engines bandwidth to be able to crawl the entire web. SEO moz hits about the top twenty five percent of links. If links are more recent, there is a chance they won't show up for 4 to 7 weeks due to the data having to be processed after the crawl and the sites crawled only once a month (you can see the dates on the site).

Majestic SEO offers a decent free service for your own sites, and the monthly if you handle a lot is small medium level is about $50 per month. Even with the free you will see a lot more links and it shows some additional data as well. For the paid, you get historic, etc.