Evan Williams, who co-founded Twitter in 2007, is stepping down as the company's chief executive.
The company has appointed the current chief operating officer Dick Costolo to the chief executive role effective immediately. Williams will remain with the company to advise on product strategy.
“When I insisted on bringing Dick into the COO role a year ago, I got a lot of questions from my board,” Williams said in a blog post.
“But I knew Dick would be a strong complement to me, and this has proven to be the case. During his year at Twitter, he has been a critical leader in devising and executing our revenue efforts, while simultaneously and effectively making the trains run on time in the office. Given Dick’s track record as a three-time successful CEO, I’m confident we can make this a smooth transition.”
Williams said that he felt his real interest was in developing new products and now that Twitter had grown so much he wanted to explore new ideas.
In his previous role as co-founder of Pyra Labs and its Blogger service, Williams is sometimes credited with inventing the word blogging.
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