Photo by Kyoko Hasegawa
- 1991: AMERICA ONLINE (AOL): 30 Million users at peak
- 1994: WARCRAFT: 9.6 Million users currently
- 1995: CLASSMATES.COM: 50 Million users at peak
- 1997: SIX DEGREES: 3.5 Million users at peak
- 2000: PANDORA: 200 Million users currently, HABBO: 240 Million users currently
- 2001: STUMBLEUPON: 25 Million users currently
- 2002: FRIENDSTER: 115 Million users currently, LAST.FM: 40 Million users currently
- 2003: LINKEDIN: 115 Million users currently, MYSPACE: 115 Million users currently
- 2004: FACEBOOK: 1.11 Billion users currently
- 2005: REDDIT & YOUTUBE
- 2006: TWITTER: 550 Million users currently
- 2007: TUMBLR & SONGKICK
- 2009: FOURSQUARE & CHARTROULETTE
- 2010: INSTAGRAM: 150 Million users currently
- 2011: GOOGLE: 300 Million users currently
- 2012: PINTEREST: 70 Million users currently
- 2013: VINE & SNAPCHAT
Sources: Rohit Kinra, Principal, Product Management, AOL Mail (2004-2010)-wow.joystiq.com/2013/02/07/world-of-warcraft-down-to-9-6-million-subscribers/-alexa.com
profiles-www.networkworld.com/news/2010/072310-myspace-loses-49-of-visitors.html-networkworld.com reports-facebook.com
press releases-linkedin.com
press releases-google play statistics (for apps)-google press releases