| SNS Name | Year Created | Created by | Active Users | Description/Focus Areas |
| | 2004 | Mark Zuckerberg | 1184 Million (Jan. 2014) | General social networking site |
| | 2006 | Jack Dorsey | 232 Million (Jan. 2014) | Mobile social networking site, Micro-blogging |
| YouTube | 2005 | Chad Hurley, Steven Chen and Jawed Karim | 1000+ Million | Video hosting/sharing site |
| StumbleUpon | 2002 | Garrett Camp and Geoff Smith | 40 Million | Discovery engine, social networking |
| MySpace | 2003 | Chris DeWolfe and Tom Anderson | 36 Million (Oct. 2013) | General social networking site |
| LinkdIn | 2002 | Reid Hoffman | 259 Million | Business and Professional Networking |
| Google+ | 2011 | Larry Page and Sergey Brin | 300 Million (Jan. 2014) | General social networking site |
| | 2010 | Ben Silbermann, Paul Sciarra and Evan Sharp | 20 Million | Visual discovery tool |
| Tumblr | 2007 | David Karp | 230 Million (Jan. 2014) | Social networking site, Micro-blogging |
| | 2005 | Steve Guffman and Alexis Ohanian | 114.9 Million (April 2014) | Social news, social networking site |
| Orkut | 2004 | Orkut Büyükkökten | Dissolved | General social networking site |