UFOCrawler was an example of a highly specialized vertical search engine. Based on manually selected websites, UFOCrawler focuses on anomalies, UFO sightings, and so on. The problem with this type of search engine is that it needs to be regularly checked whether the links are working and still relevant. This means that on the one hand a high manual/intellectual effort is required. On the other hand, this highly specialized search engine generates only a small audience, which has often not justified extensive efforts.

Language English

Launched 2007
Closed 2008

Developer IBM OmniFind Yahoo! Edition enterprise and Anomalies Network

Country of Origin

2007 - 2008 IBM OmniFind Yahoo! Edition enterprise and Anomalies Network

Topic SeEn for special interests

Region No Limitation

Technical functionalities
Robot/Crawler based, algorithmic search
Manually by an editorial team selected sites search engine
Crawler / robot based SeEn using a white list of selected sites

Used SeEn OmniFind

Older Version Internet Archive / WebCite

»What is UFOCRAWLER? The answer to that question is simple, well sort of. The UFOCRAWLER is a new type of search engine which focuses on a very narrow set of information in order to help seperate the wheat from the chaff. The idea being that in another large search engine you may put in a search for say "ufo" and get back 45 million results ranging from true results about UFO's to the band UFO to even UFO mugs when what you really want information on is unidentified flying objects. So by limiting the number of URLs which are indexed then we can limit the number of false positives.

To further decrease the possibility of getting false positives we also moderate the URLs entered. What this means is that we don't just crawl the web and dump everything into our index, instead we try to keep it to website or pages about the subject matter at hand. This again helps us to deliver results which are more on target for what your looking for.« Source

»IBM and Yahoo teamed up to bring to you UFOCrawler, a search engine that is about finding sources on “UFO Sightings, time travel, conspiracy theories and anomalies.” For example, a search on area 51 returns 7,904 sources, unfortunately some of the results do not look all that great. It is important to note that all the other tabbed searches (i..e Web Images Video Audio Directory Local News) take you to Yahoo, the Enterprise tab takes you to UFOCrawler results. This is powered by IBM OmniFind Yahoo! Edition enterprise and brought to you by the Anomalies Network.« Source


Critical points

Features & Functionality


References & further Publications

Wikipedia (EN): n.a.
Wikipedia (Others): n.a.

Other Sources

Schwartz, Barry (2007): UFO Crawler: The Truth Is Out There & Searchable. Online available at Search Engine Land. URL:
Inarejos, S. (2007): UFO Crawler: the new paranormal search engine. Online available at Bigmouthmedia. URL:

Created: 2013-04-07