1. Instagram

Google+ or Google Plus is a social network operated by Google Inc. Google+ was launched on June 28, 2011 with an invitation system to be tested. On that day, Google+ users were allowed to invite friends over 18 to create an account. However, this was immediately stopped a day later after account creation was getting worse. Many features from Google+ are similar to social networking sites like Facebook and LinkedIn.
3. Pinterest

The site functions as a digital notice board. The user can pin images all over the web and then save them on one of the created 'boards' to try or buy later. The website and mobile application are particularly popular with women (around 80% of users). In September 2017, the company announced that it had grown to 200 million monthly active users. The founder and CEO of Pinterest is Ben Silbermann, headquartered in San Francisco, California.
Facebook is a social networking service headquartered in Menlo Park, California, United States which was launched in February 2004. Until September 2012, Facebook has more than one billion active users, more than half of them use cellphones. Facebook was founded by Mark Zuckerberg with his roommates and fellow Harvard University students, Eduardo Saverin, Andrew McCollum, Dustin Moskovitz, and Chris Hughes. Membership of this website was initially limited to Harvard students only, then expanded to other colleges in Boston, Ivy League, and Stanford University.
5. VK

Twitter is owned and operated by Twitter, Inc., based in San Francisco, with additional offices and servers in New York City, Boston and San Antonio. As of May 2015, Twitter has more than 500 million users, 302 million of which are active users. The high popularity of Twitter has caused this service to be used for various purposes in various aspects, for example as a means of protest, political campaigns, learning facilities, and as an emergency communication media.
7. Flickr

According to Microsoft, LinkedIn's growth pace and product diversification were essential to catch the attention of the creator of Windows. In figures presented by the company, the corporate social network has presented an average growth of 19% on year, with more than 433 million registered members.
Sina Weibo is a Chinese social networks website, like Facebook and Twitter. It is used by approximately 30% of Internet users in China, reaching a penetration close to that of Twitter in the United States, as by mid-2012 it had about 368 million registered users. It is a hybrid system between Twitter and Facebook. Sina Weibo is sometimes referred to as Chinese Twitter. The site is available in Simplified Chinese, Traditional Chinese and English. Sina Weibo can be accessed from various platforms, such as Android, BlackBerry OS, iOS, Symbian S60, Windows Mobile and Windows Phone.
10. Tumblr

11. Quora

Quora is a question-and-answer website, where people can ask questions, give answers and can also change it. It has been published by Quora Inc., whose headquarters is located in Mountain View, California.
12. SoundCloud

13. Tagged

14. Goodreads

15. Orkut

16. Ning

17. Viadeo

18. delicious

19. Meetup

20. Skyrock

21. Last.fm

We heart it is a place to share and find inspirational pictures. It's home, inspiration, and a place to organize things you love. You can create your own profile and create folders with pictures you like.
23. hi5

24. WAYN

Plurk is a free social networking and microblog service that allows users to send updates (known as a plurk) through a web interface, short message, or other means, with a maximum length of 140 characters. This update will be displayed on the user's web page using a timeline that displays all received updates in chronological order, and then is delivered to other incoming users. Users can respond to updates from other users of their timeline through the Plurk.com website, sender of instant messages, or short messages.
FilmAffinity is a website dedicated to cinema. FilmAffinity was created in Madrid in 2002 by film critic Pablo Kurt Verdú Schumann and programmer Daniel Nicolás. From the beginning, the page consisted of a film recommender system called Almas twins, which showed the closest people according to the scores given to the films. Three years later, the criticism section was launched, where users expressed their opinion about a film.
Myspace is a social networking site. The head office is located in Beverly Hills, California. MySpace became the most popular social networking site in the United States in June 2006. Based on comScore, MySpace was followed by its main international competitor, Facebook in April 2008. MySpace employs 1,000 employees in June 2009. The company does not disclose revenue or profits separately from News Corporation.
Yammer is a freemium social networking company launched in 2008 and purchased by Microsoft in 2012 worth US $1.2 billion. Yammer is used for personal communication within organizations and is an example of corporate social software. Yammer was originally developed as an internal communication system for genealogical websites called Geni. Access to Yammer networks is determined by the user's Internet domain, only people with certain email addresses can join the network.
MyHeritage is a family-oriented social network and genealogical site that allows members to create their own family websites, share photos and videos, organize family holidays, create family trees and search for ancestors. With over 71 million users, MyHeritage is one of the largest social networking and genealogy sites.
30. Busuu

Busuu is a social network and community platform for language learning. Users can help each other to improve their language skills.
Odnoklassniki is a Russian social networking website owned by Mail.Ru Group. At the beginning of 2018, it was the third most popular website in Armenia, fourth most popular in Russia and Azerbaijan, fifth position in Kazakhstan, seventh in Ukraine and 27th rank in the world. The project was launched on March 26, 2006. According to the website statistics in July 2011, more than 100 million users were registered. The website currently has more than 200 million registered users and 45 million daily unique visitors.
Douban is primarily a social networking website of China. The website was established on March 6, 2005 by Yang Bo. The website starts with a book and audio, and provides information about books, movies, music, and other works. User-generated content is a unique website in China's Web 2.0 website. This website also provides various types of service functions such as audio and video recommendations, offline city activities, group theme exchange etc. It works like a collection system, expression system and exchange. This website is devoted to the system's innovative network service, to help urban people discover useful things in life. In August 2012, Douban announced that with its daily average daily PV of $160 million, its monthly number has grown to more than 100 million unique visitors. In the second and third quarters of 2013, the number of independent users of Douban monthly coverage reached 200 million, which was twice in the same period last year.
LiveJournal is a virtual community where users can keep a blog or newspaper. It is also the name of free software designed to materialize community exchanges. The main differences between LiveJournal and other blog sites are its autonomous community and social network characteristics similar to Friendster and MySpace for example. LiveJournal was created in 1999 by Brad Fitzpatrick to keep in touch with his high school friends. In January 2005, blogging software company Six Apart bought Danga Interactive, the Fitzpatrick-owned company that runs LiveJournal. In 2007, Six Apart resold LiveJournal to the Russian company SUP Media, which from 2009 begins to repatriate its services in Russia, until December 2016, when it finally repatriates the servers.
34. DeviantArt

35. Yelp, Inc.

36. StumbleUpon

37. Academia.edu

Users were required to register before using the site, which registration was only possible by invitation. After that, they could create a personal profile, add other users as friends, and exchange messages, including automatic notifications when they update their profile.
39. Renren

Renren is a Chinese social networking website. In August 2009, Xiaonei Network officially changed its name to Renren with as domain name www.renren.com.
40. 43 Things

41. About.me

42. Advogato

43. AsianAvenue

44. Athlinks

45. Audimated.com

46. Bebo

47. Biip.no

48. BlackPlanet

49. Bolt.com

50. Buzznet

51. CafeMom

52. Care2

53. CaringBridge

54. Classmates.com

55. Cloob

56. CouchSurfing

57. CozyCot

58. Crunchyroll

59. Cucumbertown

60. Cyworld

61. DXY.cn

62. DailyBooth

63. DailyStrength

64. Diaspora

65. Disaboom

66. Dol2day

67. DontStayIn

68. Doximity

69. Draugiem.lv

70. Dreamwidth

71. Elftown

72. Elixio

73. Ello

74. English, baby!

75. Eons.com

76. Experience Project

77. Fetlife

78. Filmow

79. FledgeWing

80. Flixster

81. Focus.com

82. Fotki

83. Fotolog

84. Foursquare

85. Friendica

86. Friends Reunited

87. Friendster

88. Fuelmyblog

89. Fyuse

90. Gab.ai

91. Gaia Online

92. GamerDNA

93. Gapyear.com

94. Gather.com

95. Gays.com

96. Geni.com

97. Gentlemint

98. GetGlue

99. GirlsAskGuys

100. Gogoyoko

101. Goodwizz

102. GovLoop

103. Grindr

104. Grono.net

105. HR.com

106. Habbo

107. Hospitality Club

108. Hotlist

109. Hub Culture

110. IRC-Galleria

111. Ibibo

112. Identi.ca

113. Indaba Music

114. Influenster

115. Itsmy

116. Jaiku

117. Jiepang

118. Kiwibox

119. LaiBhaari

120. Late Night Shots

121. LibraryThing

122. Lifeknot

123. LinkExpats

124. Listography

125. Livemocha

126. MEETin

127. MOG

128. Makeoutclub

129. Meettheboss

130. MillatFacebook

131. Minds

132. MocoSpace

133. MouthShut.com

134. Mubi

135. My Opera

136. Nasza-klasa.pl

137. Netlog

138. Nexopia

139. OUTeverywhere

140. Open Diary

141. Partyflock

142. PatientsLikeMe

143. Pingsta

144. Playfire

145. Playlist.com

146. Poolwo

147. Quechup

148. Qzone

149. Raptr

150. Ravelry

151. ReverbNation.com

152. Rooster Teeth

153. Ryze

154. ScienceStage

155. ShareTheMusic

156. Shelfari

157. Skoob

158. SocialVibe

159. Sonico.com

160. Spaces

161. Spot.IM

162. Spring.me

163. Stage 32

164. Stickam

165. Streetlife

166. Students Circle Network

167. StudiVZ

168. Talkbiznow

169. TeachStreet

170. TermWiki

171. The Sphere

172. TravBuddy.com

173. Travellerspoint

174. Trombi.com

175. Tuenti

176. Tylted

177. Untappd

178. Vampirefreaks.com

179. Virb

180. Vox

181. Wattpad

182. WeeWorld

183. Wellwer

184. Wepolls.com

185. Wer-kennt-wen

186. Wooxie

187. WriteAPrisoner.com

188. Xanga

189. Xt3

190. Yookos

191. Zoo.gr

192. aNobii

193. aSmallWorld

194. eToro

195. italki

196. tribe.net

197. weRead

198. Kaixin001

199. Taringa!

200. Uplike

201. XING

202. mixi
