Yahoo to buy Tumblr for $1.1bn

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Media captionWikipedia's Jimmy Wales gives his reaction to Yahoo's deal with Tumblr

Yahoo has agreed a deal to buy New York-based blogging service Tumblr for $1.1bn (£723m; 857m euros) in cash.

Yahoo's chief executive Marissa Mayer said that as part of its promise "not to screw it up", Tumblr would operate independently.

David Karp, will continue as chief executive officer of Tumblr.

The deal is the largest made by Ms Mayer since she took the helm at Yahoo last July, and she described the acquisition as a "unique opportunity."

"On many levels, Tumblr and Yahoo couldn't be more different, but at the same time, they couldn't be more complementary," added Ms Mayer.

Mr Karp, 26, who owns 25% of the privately-owned company he co-founded with Marco Arment in 2007, said he was "elated" to have the support of Yahoo.

"Tumblr gets better faster with more resources to draw from," he added. Mr Karp emphasised that neither its aims or team was changing as a result of Yahoo's purchase.

Mobile devices

The $1.1bn price tag for Tumblr represents a significant premium on its $800m valuation when it last raised money from private investors.

Tumblr's 2012 revenue was just $13m, according to a report by Forbes magazine, leading analysts to suggest Yahoo had overpaid for the deal.

"Even if revenue was $100 million, it means Yahoo paid 10 times revenue," said BGC Financial analyst Colin Gillis. "Ten times is what you pay to date the belle of the ball. It's on the outer bands of M&A."

Tumblr combines elements of blogging with social networking, and its simple design has attracted millions of users since its launch.

According to its homepage, it now hosts 108 million blogs, with a total of 50.7 billion posts.

It also has a significant presence on mobile devices.

But despite its fast-growing user base, it has struggled to make money and has traditionally resisted advertising.

It said in April 2012 that it would roll out limited use of adverts.

Ms Mayer said Yahoo would now work with Tumblr to create ads that "are seamless and enhance the user experience".

Image caption Tumblr's founder David Karp will keep his role as chief executive

Brian Wieser, analyst at Pivotal Research Group, said that the quickest way for Yahoo to boost Tumblr's revenue would be to combine its sales force with the blogging site, but that this would risk alienating users.

"It's not clear that this deal will be favourable from a return-on-capital perspective," Wieser said. "One billion [dollars] for one company is a big bet."

Yahoo remains a giant in the internet world, with around 700 million visitors to its website every month. The majority of its revenues come from advertising.

But it has limited mobile reach and lags behind Google in the search engine rankings.

It also shed more than 1,000 jobs during 2012 and has long been divided over whether it should focus on media content or on tools and technologies.

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