Friendster是一个2002年创立的社交网络服务网站，总部位于美国加州。这个以朋友圈为基础的网站比Myspace或Facebook更早设立，后来在美国的页面浏览量被Myspace所超越，改服务允许用户与其他用户联络，并且分享互联网上的内容。Friendster有1.15亿注册用户，每月有6100万独立访问量，90%的流量来自亚洲。Friendster拥有多项社交网站专利权，2010年8月Facebook承认他们向Friendster购买18个专利来使用。

Friendster was a social gaming site based in Kuala Lumpur, Malaysia. It was originally a social networking service website. Before Friendster was redesigned, the service allowed users to contact other members, maintain those contacts, and share online content and media with those contacts. The website was also used for dating and discovering new events, bands and hobbies. Users could share videos, photos, messages and comments with other members via profiles and networks. It is considered one of the original and even the "grandfather" of social networks.