In 2009, Tencent launched Xiaoyou (校友, 'schoolmate'), its first social network website.
In mid-2010, Tencent changed direction and replaced Xiaoyou with Pengyou (朋友, 'friends'), trying to establish a more widespread network, to which extant QQ users could be easily redirected, hence giving Pengyou a major advantage over its competitors.
This has raised concerns of replacing (and thus "inflating") real currency in these transactions.
Furthermore, QQ's parent company, Tencent, has over successive versions modified the QQ protocol to the extent that it can no longer be supported by most, and perhaps any, of the third-party implementations that were successful in the past (some of which are listed below).
As of 2009, none of the developers of third-party clients have publicized any plans to restore QQ support.
Tencent launched its web-based QQ formally on 15 September 2009, the latest version of which being 3.0.
Rather than solely a web-based IM, Web QQ 3.0 functions more like its own operating system, with a desktop in which web applications can be added.