| Description/Focus | Website | #Users |
| General. | |
| General. No longer popular in US, but still extremely popular in Europe, Latin America and parts of Asia | |
| General. In Simplified Chinese; caters for mainland China users | |
| Blogging | |
| General for teens. Over 31 communities worldwide. Chat Room and user profiles. | |
| General. Popular in Southeast Asia. No longer popular in the western world. | |
| General. Popular in India,Portugal, Mongolia, Thailand, Romania, Jamaica, Central Africa and Latin America. Not popular in the USA. | |
| General | |
| Owned by Google. Popular in Brazil and India | |
| Movies | |
| General. Popular in Europe, Turkey, the Arab World and Canada's Québec province. Formerly known as Facebox and Redbox | |
| Locating friends and family, keeping in touch (formerly Reunion.com) | |
| School, college, work and the military | |
| Russian social network. | |
| General. Micro-blogging, RSS, updates | |
| | Description/Focus | Website | #Users |
| General but mainly business | |
| General. | |
| General. Popular in Russia and former Soviet republics | |
| General, Popular in Europe | |
| Adults Only Porn Network | |
| Photo sharing, commenting, photography related networking, worldwide | |
| Music | |
| family-oriented social network service | |
| Blogs and 'metro' areas | |
| School, college and friends. Popular in Poland. | |
| Japan | |
| Music, Video, Photos, Blogs | |
| Social Network in French-speaking world | |
| Photoblogging. Popular in South America and Spain | |
| African-Americans | |
|