Google said it will shut down Orkut, which is widely used in Brazil and India but hasn't caught on more broadly, on Sept. 30, to focus on its other social networking initiatives.
The company declined to say how many users Orkut has.
"Over the past decade, YouTube, Blogger and Google+ have taken off, with communities springing up in every corner of the world. Because the growth of these communities has outpaced Orkut's growth, we've decided to bid Orkut farewell," Google said in a post on the Orkut blog on Monday.
Orkut was launched early in 2004, the same year that Facebook Inc, now the world's No.1 social network with 1.28 billion users, was founded.
The service's shutdown comes as Google's social networking plans remain in question. In April, Vic Gundotra, the head of Google's social networking services, left the company.
"If you don't want your posts or name to be included in the community archive, you can remove Orkut permanently from your Google account," Google said.