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Facebook acquires voice tech start-up

Facebook has acquired, a start-up that develops open-source voice recognition interfaces, announced on Monday.

Facebook declined to disclose financial details of the deal. The social media giant is still determining how to use technology within its products, a Facebook spokeswoman told CNBC.

"Facebook's mission is to connect everyone and build amazing experiences for the over 1.3 billion people on the platform—technology that understands natural language is a big part of that, and we think we can help," wrote on its blog.

Jonathan Nackstrand | AFP | Getty Images

The start-up was founded 18 months ago and produces open platforms that allow developers to build voice-based applications. More than 6,000 developers have worked on the platform, said.

Read MoreWearables, 3-D printers, and virtual reality dominate CES's interface will remain open and free after it joins Facebook, according to its website.

The deal comes as Facebook is extending its reach beyond its core products. The company bought virtual reality headset maker Oculus VR for $2 billion in March. declined to comment on the deal's details.

—Reuters contributed to this report.