The legendary Thunder (Xunlei) version of QQ, or Xunlei's IM service, has made an appearance. It isn't the kind of standalone software we imagined; instead, it’s cleverly integrated into the left sidebar of Thunder.
At this point, it still feels rather basic (as shown in the image), and relying solely on Xunlei to compete with Tencent is almost an impossible task. No one would give up QQ just because of the emergence of Xunlei IM, at least I wouldn’t.
Moreover, since it's just starting to develop, they're probably not considering adding advertisements for now, but once they accumulate enough users, it will likely be upgraded to a version that pops up ads.
For IM services, I still prefer QQ + Gtalk.