I have been looking at various ways to find similar sites to the one specified: there are tools that analyze visitors’ behavior and generate the list of resources people also like to visit (Alexa.co), there are tools that analyze users’ bookmarking preferences and generate the list of sites having similar tags when bookmarked (Delicious and FoxMarks).
"Similar site" is the tool that is also "mainly based on user annotations or tags on websites". While that remained not really clear to me which database the tool is using (probably it’s own) but I found the results intriguing enough to share with our readers (the interface may look a bit simplistic but the actual job seems pretty well done).
So: type in any page URL and hit "Search". The results page returned contains the following (useful) information:
- The confidence level (more about this one below);
- The most frequent tags used for the page (you can exclude any or add your own to refine the results);
- The list of similar sites;
- Most frequent tags characterizing each page in the list;
- The similarity score (how similar each page appears to be to the base one, in %);
- The quick button to find similar pages to each one in the list.

Thus the accuracy of results returned is basically defined by 2 main factors:
- The combination of tags;
- The level of confidence.
The level of confidence is the grade given to each page depending on how many users tagged it (obviously the fewer people tagged the page, the less probable it is that the page has most relevant tags, thus the lower the level, the worse the results returned):
- very low : The site being searched has been tagged less than 5 times. Fulltext search is used.
- low : The site being searched has been tagged less than 50 times. Tag based searched is used.
- medium : The site being searched has been tagged less than 100 times. Tag based searched is used.
- high : The site being searched has been tagged more than 100 times. Tag based searched is used.
The free tool was reviewed under SEJ disclaimer.





Interesting search engine tool article!
Hi Ann,
Really Great tool to find competitor as well.
Hi Guyz,
I found another great tool that finds similar sites.
Check out http://tinyurl.com/m7g6gp
I know of this, its a great tool
In today’s internet-dominated world, search engine marketing has become an essential part of every business. Organizations aspire to attract as much visibility online as possible. Search is by far the most used function on the internet and it is natural that search engine optimization should be indispensible to marketers, to increase visibility online.
http://blogs.position2.com/category/seo/page/4
Similar sites finder is a great tool. i use it a lot for SEO search on web.
There is another sites that gives you that application-> http://www.similarsites.com
Are you familiar with it?
In addition, there is a firefox addon that does the same. It can be found at http://www.similarweb.com
Ann,
Thanks for introducing our website. We have changed the site name to http://www.similarsitesearch.com/.
Our database size has tripled and algorithm has improved. One significant change we made recently is “search wiki” feature. You can now “thumb up” or “thumb down” a website. Next time when you visit (from the same computer), you will see your previous votes. We will take consideration of users’ vote when scoring sites. We are now a web2.0 search engine. Thanks!