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|Type of site||Social network service|
|Registration||Required, by invitation|
|Owner||Origo Média és Kommunikációs Szolgáltató Zrt.|
|Alexa rank||15,776 (March 2014[update])|
iWiW (abbreviation for International Who is Who) is a Hungarian social networking web service started on April 14, 2002 as WiW (Who Is Who). As of 2007 August[update], it has 2,6 million registered users with real names. Every user can provide personal information such as the place they live in, date of birth, schools and universities they attended, workplaces, interests and pets. One can find friends by a search tool or looking through one's acquaintances' acquaintances.
On October 26, 2005 the system was rebuilt from scratch and got a new name (iWiW). The most important changes are the multilingual interface (currently reverted to Hungarian-only as of July 2006), listings, photo upload and a special Java applet to visualize the connections.
On 28 April 2006, T-Online, the net branch of Magyar Telekom, has purchased iWiW for almost one billion HUF (about 4.7 million USD). Users expressed concerns that their personal data may be sold to telemarketers or used for other purposes potentially hurting their privacy. Because of fears for abuse by the Hungarian telco giant, several iWiW clones and unrelated Hungarian social networking websites appeared or gained in popularity since the take-over.
Since the T-Online acquisition, the site is available only in Hungarian.
On July 18, 2006 the iWiW had 1 million users and on December 18 it reached 1.5 million.
On Dec 24, 2008 the number of registered users on iWiW 4 million, covering almost all internet users in Hungary. 
On 22 April 2009, 26 applications became available on iwiw.hu. By mid-2009, users could choose from 65 applications.
- "Iwiw.hu Site Info". Alexa Internet. Retrieved 2014-03-01.
- (Hungarian) Interview with the maintainers on occasion of moving the servers
- (Hungarian) iWiW user count passed 4 million
- (Hungarian) Iwiw is not only used as a contact list but also as a passport
- (Hungarian) iWiW app released for iOS and Android