WOT Services

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For the cryptography term, see Web of trust.
WOT Services, Ltd.
Industry Internet safety
Founded July 2006
Headquarters Helsinki, Finland
Website www.mywot.com

WOT Services, Ltd is a Finnish company that runs the partly crowdsourced Internet website reputation rating tool Web of Trust (WOT). The installed WOT browser add-on shows its users the reputations of websites, which are calculated through a combination of user ratings and data from other sources.


WOT was founded in 2006 by Sami Tolvanen and Timo Ala-Kleemola, who wrote the WOT software as post-graduates at the Tampere University of Technology in Finland. They launched the service officially in 2007, with serial entrepreneur and angel investor Esa Suurio as CEO. In November 2009 Suurio moved on to his next endeavor.

The company has partnered with Facebook, hpHosts, LegitScript, Mail.ru, Panda Security, Phishtank, GlobalSign and TRUSTe.[1][2][3][4][5][6][7]

WOT's services[edit]

The WOT browser add-on does two things: (1) it sends user ratings to the WOT site, and (2) it displays the computed results via color-coded icons in the user's browser tool-bar and next to external links on the pages of leading search engines, email services and social network sites. The add-on source code is public.

The program software at WOT headquarters is not public. According to the company information it is designed to compute the measure of trust the rating users have in websites, enhanced with data from a number of third-party sources. The user rating system claims to be meritocratic; the weight of ratings are algorithmically calculated for each user individually.

To generate revenue WOT licenses the use of its reputation database to other businesses.


The rating tool has received several reviews in the press.[8][9][10]


On December 7, 2010, ten companies all associated to Ayman El-Difrawi aka Alec Difrawi filed a lawsuit in Florida against WOT Services for defamation, violating rights, conspiracy and manipulating algorithms, among other claims, demanding WOT to remove ratings and comments for their numerous websites.[11] On December 8, 2011, the case was dismissed with prejudice. [12][13]

See also[edit]


  1. ^ "Facebook Security - Keeping You Safe from Scams and Spam". 12 May 2011. Retrieved 31 May 2014. 
  2. ^ "Donna's SecurityFlash - Web of Trust (WOT) is now using hpHOSTS database". 6 July 2008. Retrieved 31 May 2014. 
  3. ^ "LegitScript Blog - LegitScript, Web of Trust announce partnership". 13 May 2010. Retrieved 31 May 2014. 
  4. ^ "Reuters - Mail.Ru Group Launches New Browser Featuring Web of Trust Safe-Surfing Technology". 8 August 2012. Retrieved 31 May 2014. 
  5. ^ Schaffhauser, Dian (11 August 2009). "The Journal - Panda Security, Against Intuition Offer Free 'Web of Trust' Browser Addon". Retrieved 31 May 2014. 
  6. ^ "Friends of PhishTank". Retrieved 31 May 2014. 
  7. ^ "GlobalSign - GlobalSign Partners with Web of Trust to Provide Reputation Data in the Website Passport". 15 March 2012. Retrieved 31 May 2014. 
  8. ^ Rubenking, Neil J. "PC Magazine - Web of Trust Review and Rating". Retrieved 17 May 2011. 
  9. ^ "Gizmo's freeware - Best Free Internet Safety Check". 6 May 2011. Retrieved 17 May 2011. 
  10. ^ "Mashable - Web of Trust is the Robert De Niro of Reputation Sites". Retrieved 4 December 2007. 
  11. ^ "WOT blog - Safe Surfing Tool Web of Trust Sued over Community Warnings". Retrieved 22 December 2011. 
  12. ^ Orange County court records search Case No. 2010-CA-022724-O, Career Network, Inc. et al v. WOT Services, Ltd. et al
  13. ^ "ArcticStartup - WOT Wins Lawsuit In The US". ArcticStartup. Retrieved 22 December 2011.