| Name |
Description/Focus |
User count |
Registration |
| 43 Things |
Goal and Dreams; Tagging |
&&&&&&&&01007433.&&&&&01,007,433[1] |
Open |
| Advogato |
Free software and open source developers |
&&&&&&&&&&011000.&&&&&011,000[2] |
Open |
| Amina – Chechen Republic Online |
Chechens |
&&&&&&&&&&&03500.&&&&&03,500+[3] |
Open |
| aSmallWorld |
European jet set and social elite |
&&&&&&&&&0150000.&&&&&0150,000[4] |
Invite-only |
| Badoo |
European young adults |
&&&&&&&&&01.2E+7.Expression error: Unrecognised word “e”12,000,000[5] |
Open |
| Bebo |
Schools and colleges |
&&&&&&&&&03.4E+7.Expression error: Unrecognised word “e”34,000,000[6] |
Open |
| BlackPlanet |
African-Americans |
&&&&&&&&&01.6E+7.Expression error: Unrecognised word “e”16,000,000[7] |
Open |
| Blue Dot |
Link sharing |
&&&&&&&&&&080000.&&&&&080,000[8] |
Open |
| Broadcaster.com |
Video sharing and webcam chat |
&&&&&&&&&02.6E+7.Expression error: Unrecognised word “e”26,000,000[9] |
Open |
| Buzznet |
Music and pop-culture |
&&&&&&&&&05.0E+5.Expression error: Unrecognised word “e”500,000+[10] |
Open |
| CarDomain |
Car enthusiasts |
&&&&&&&&&01.6E+6.Expression error: Unrecognised word “e”1,600,000[11] |
Open |
| Care2 |
Green living and social activism |
&&&&&&&&07744297.&&&&&07,744,297[12] |
Open |
| Classmates.com |
School, college, work and the military |
&&&&&&&&&04.0E+7.Expression error: Unrecognised word “e”40,000,000[13] |
Open |
| Consumating |
“Consumeetings” |
&&&&&&&&&&021000.&&&&&021,000[14] |
Open |
| CouchSurfing |
Hospitality |
&&&&&&&&&0281000.&&&&&0281,000[15] |
Open |
| Cyworld |
Young South Koreans |
&&&&&&&&02.12E+7.Expression error: Unrecognised word “e”21,200,000[16] |
Open |
| Dandelife |
Collective narratives or “shared biographies” |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Dodgeball |
Mobile location-based service, owned by Google |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[17] |
Open |
| DontStayIn |
Clubbing (primarily UK) |
&&&&&&&&&0235000.&&&&&0235,000+[18] |
Open |
| Doostang |
Careers |
&&&&&&&&&0173000.&&&&&0173,000[19] |
Invite-only |
| eCRUSH |
Teens |
&&&&&&&&&04.4E+6.Expression error: Unrecognised word “e”4,400,000[20] |
Open |
| Experience Project |
Life experiences |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Facebook |
Started for colleges, then high schools, and now everyone. |
&&&&&&&&&04.8E+7.Expression error: Unrecognised word “e”48,000,000[21] |
Open |
| Faceparty |
British teens and young adults |
&&&&&&&&&05.9E+6.Expression error: Unrecognised word “e”5,900,000[22] |
Open to people 16 and older. |
| Flickr |
Photo sharing |
&&&&&&&&&04.0E+6.Expression error: Unrecognised word “e”4,000,000[23] |
Open (Yahoo! login) |
| Flirtomatic |
Flirting/Dating |
&&&&&&&&&0265000.&&&&&0265,000[24] |
Open to people 18 and older. |
| Fotki |
Photo sharing |
&&&&&&&&&01.0E+6.Expression error: Unrecognised word “e”1,000,000[25] |
Open |
| Fotolog |
Photoblogging |
&&&&&&&&&09.0E+6.Expression error: Unrecognised word “e”9,000,000[26] |
Open |
| Friends Reunited |
School, college, work, sport and streets |
&&&&&&&&&01.9E+7.Expression error: Unrecognised word “e”19,000,000[27] |
Open |
| Friendster |
General |
&&&&&&&&&05.0E+7.Expression error: Unrecognised word “e”50,000,000[28] |
Open |
| Frühstückstreff |
General |
&&&&&&&&&&011600.&&&&&011,600[29] |
Open |
| Gaia Online |
Anime and games |
&&&&&&&&&09.3E+6.Expression error: Unrecognised word “e”9,300,000[30] |
Open |
| Gather |
Article, picture, and video sharing, as well as group discussions |
&&&&&&&&&0360000.&&&&&0360,000[31] |
Open |
| Geni.com |
Families, genealogy |
&&&&&&&&&01.0E+5.Expression error: Unrecognised word “e”100,000[32] |
Open |
| Graduates.com |
School, college, and work |
&&&&&&&&&0650000.&&&&&0650,000[33] |
Open |
| Grono.net |
Poland |
&&&&&&&&01350000.&&&&&01,350,000[34] |
Invite-only |
| GuildCafe |
Online games |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| hi5 |
General |
&&&&&&&&&05.0E+7.Expression error: Unrecognised word “e”50,000,000[35] |
Open |
| Hospitality Club |
Hospitality |
&&&&&&&&&0328629.&&&&&0328,629[36] |
Open |
| Hyves |
General Dutch social networking website |
&&&&&&&&03266581.&&&&&03,266,581[37] |
Open |
| imeem |
Music, Video, Photos, Blogs |
&&&&&&&&&01.6E+7.Expression error: Unrecognised word “e”16,000,000[38] |
Open |
| IRC-Galleria |
Finland |
&&&&&&&&&04.0E+5.Expression error: Unrecognised word “e”400,000[39] |
Open |
| iWiW |
Hungary |
&&&&&&&&&02.6E+6.Expression error: Unrecognised word “e”2,600,000[40] |
Invite-only |
| Jaiku |
General |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[41] |
Open |
| Joga Bonito |
Football (soccer) |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Last.fm |
Music |
&&&&&&&&&01.5E+7.Expression error: Unrecognised word “e”15,000,000[42] |
Open |
| LibraryThing |
Book lovers |
&&&&&&&&&0214425.&&&&&0214,425[43] |
Open |
| LinkedIn |
Business |
&&&&&&&&&01.5E+7.Expression error: Unrecognised word “e”15,000,000[44] |
Open |
| LiveJournal |
Blogging. Popular in Russia. |
&&&&&&&&01.29E+7.Expression error: Unrecognised word “e”12,900,000[45] |
Open (OpenID) |
| LunarStorm |
Sweden |
&&&&&&&&&01.2E+6.Expression error: Unrecognised word “e”1,200,000[46] |
Open |
| MEETin |
General |
&&&&&&&&&&072000.&&&&&072,000[47] |
Open |
| Meetup.com |
General |
&&&&&&&&&02.0E+6.Expression error: Unrecognised word “e”2,000,000[48] |
Open |
| MiGente.com |
Latinos |
&&&&&&&&&03.6E+6.Expression error: Unrecognised word “e”3,600,000[49] |
Open |
| Mixi |
Japan |
&&&&&&&&09830000.&&&&&09,830,000[50] |
Invite-only |
| MOG |
Music |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Multiply |
“Real world” relationships |
&&&&&&&&&05.0E+6.Expression error: Unrecognised word “e”5,000,000[51] |
Open |
| MyChurch |
Christian Churches |
&&&&&&&&&&070306.&&&&&070,306[52] |
Open |
| My Opera Community |
General (blogs, photo albums, forums, groups, etc.) |
&&&&&&&&01001798.&&&&&01,001,798[53] |
Open |
| MySpace |
General |
&&&&&&0206304468.&&&&&0206,304,468[54] |
Open |
| myYearbook |
General |
&&&&&&&&&0950000.&&&&&0950,000[55] |
Open |
| Netlog |
Formerly known as Facebox. |
&&&&&&&&&02.4E+7.Expression error: Unrecognised word “e”24,000,000[56] |
Open |
| Nexopia |
Canada |
&&&&&&&&01158531.&&&&&01,158,531[57] |
Open |
| Ning |
Social network creation |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| OkCupid |
Dating |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| orkut |
Owned by Google. Popular in Brazil and India. |
&&&&&&&067962551.&&&&&067,962,551[58] |
Open (Google login) |
| OUTeverywhere |
Gay |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Passado |
General |
&&&&&&&&&04.7E+6.Expression error: Unrecognised word “e”4,700,000[59] |
Open |
| Piczo |
Teenagers, Canadians, photo sharing |
&&&&&&&&&01.0E+7.Expression error: Unrecognised word “e”10,000,000[60] |
Open |
| Playahead |
Swedish teenagers |
&&&&&&&&&0530000.&&&&&0530,000[61] |
Open |
| Playtxt |
Mobile social network, location, worldwide |
&&&&&&&&&&070000.&&&&&070,000 |
Open |
| ProfileHeaven |
British teens |
&&&&&&&&&01.0E+5.Expression error: Unrecognised word “e”100,000[62] |
Open |
| Pownce |
Moblog for websites, files, and short updates |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Invite-only |
| RateItAll |
General (consumer ratings) |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[63] |
Open |
| Reunion.com |
Locating friends and family, keeping in touch |
&&&&&&&&&02.8E+7.Expression error: Unrecognised word “e”28,000,000[64] |
Open |
| Ryze |
Business |
&&&&&&&&&0250000.&&&&&0250,000[65] |
Open |
| Searchles |
Social search and networking |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[66] |
Open |
| Sconex |
American high schools |
&&&&&&&&&05.0E+5.Expression error: Unrecognised word “e”500,000[67] |
Open |
| Sermo |
Physicians |
&&&&&&&&&&020000.&&&&&020,000[68] |
Open only to registered D.O.s and M.D.s in the U.S.A. |
| sexi |
Japan (sexual networking site) |
&&&&&&&&&&060000.&&&&&060,000[69] |
Invite-only |
| Shelfari |
Books |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Skyrock Blog |
France, Belgium, French Polynesia, Guadeloupe, Martinique, New Caledonia, Senegal |
&&&&&&&&&03.8E+6.Expression error: Unrecognised word “e”3,800,000[70] |
Open |
| Snooth |
Wine |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| Soundpedia |
Music |
&&&&&&&&&03.5E+6.Expression error: Unrecognised word “e”3,500,000[71] |
Open |
| Sportsvite |
Recreational sports |
&&&&&&&&&&018000.&&&&&018,000[72] |
Open |
| Studivz |
University students, mostly in the German-speaking countries |
&&&&&&&&&02.4E+6.Expression error: Unrecognised word “e”2,400,000[73] |
Open |
| StumbleUpon |
Websurfing |
&&&&&&&&&03.2E+6.Expression error: Unrecognised word “e”3,200,000[74] |
Open |
| Tagged.com |
General |
&&&&&&&&&03.0E+7.Expression error: Unrecognised word “e”30,000,000[75] |
Open |
| TagWorld |
General (tagging) |
&&&&&&&&01850692.&&&&&01,850,692[76] |
Open |
| TakingITGlobal |
Social action |
&&&&&&&&&0145000.&&&&&0145,000[77] |
Open |
| The Student Center |
Teens and colleges |
&&&&&&&&&08.0E+5.Expression error: Unrecognised word “e”800,000[78] |
Open |
| Threadless |
Custom T-shirts |
&&&&&&&&&0364474.&&&&&0364,474 |
Open |
| TravBuddy.com |
Travel |
&&&&&&&&&0760000.&&&&&0760,000[79] |
Open |
| Travellerspoint |
Travel |
&&&&&&&&&0105000.&&&&&0105,000[80] |
Open |
| tribe.net |
General |
&&&&&&&&&0602876.&&&&&0602,876 [81] |
Open |
| Twitter |
General |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[82] |
Open |
| Vox |
Blogging |
&&&&&&&&&&&&&&-1.1.0E+6Unknown |
Open |
| WAYN |
Travel and lifestyle |
&&&&&&&&&08.0E+6.Expression error: Unrecognised word “e”8,000,000[83] |
Open to people 18 and older |
| WebBiographies |
Genealogy and biography |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[84] |
| WeeWorld |
General (cartoons) |
&&&&&&&&&01.7E+6.Expression error: Unrecognised word “e”1,700,000[85] |
open |
| Windows Live Spaces |
Blogging (formerly MSN Spaces) |
&&&&&&&&&01.2E+8.Expression error: Unrecognised word “e”120,000,000[86] |
Open |
| Woophy |
travel & photography, photo sharing website |
&&&&&&&&&&020000.&&&&&020,000[87] |
Open |
| Xanga |
Blogs and “metro” areas |
&&&&&&&&&04.0E+7.Expression error: Unrecognised word “e”40,000,000[88] |
Open |
| XING |
Business |
&&&&&&&&&04.0E+6.Expression error: Unrecognised word “e”4,000,000[89] |
Open |
| Yahoo! 360° |
Linked to Yahoo! IDs |
&&&&&&&&&04.7E+6.Expression error: Unrecognised word “e”4,700,000[90] |
Open to people 18 and older, (Yahoo! login) |
| Yahoo! Mash |
Yahoo’s new SNS – Still in beta |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[91] |
invite only while in beta |
| Zooomr |
Universal photo sharing |
&&&&&&&&&&&&&&-1.1.0E+6Unknown[92] |
Open (OpenID) |