Kim Kelleher is leaving her post as worldwide publisher of Time magazine to become president of Say Media, the blog network that includes sites such as XOJane, Gardenista, ReadWriteWeb, Style Bubble and Techdirt, Ad Age has learned.

Time magazine, part of Time Inc., and Say Media, where Ms. Kelleher succeeds Troy Young, confirmed the move Tuesday. Time plans to look at internal and external candidates to succeed Ms. Kelleher. Mr. Young is leaving Say Media.

Say Media, which is based in San Francisco, has been busy building out content areas such as women's lifestyle and technology. The company, which has raised more than $30 million in venture funding by Crunchbase's count, acquired the tech-news blog ReadWriteWeb in December. Some of the sites in its network are independently owned.

"Say is an amazing story and an amazing opportunity," Ms. Kelleher said, saying her exit from Time had less to do with the magazine and more to do with the potential at her new job. "Its CEO Matt Sanchez and his team have built an incredible business. It's really rooted in technology, which I think is an incredible advantage right now."

Ms. Kelleher will bring the company extensive contacts with brand marketers from her time in the magazine business. She joined Time Inc. from Conde Nast two years ago to run Sports Illustrated, but then-CEO Jack Griffin moved her to Time after just five months.

Ad Age named her publisher of the year last fall for her early work at Time , but the magazine has struggled this year. Time 's ad pages this year through its July 2 issue have declined 20% from the year-earlier period, according to the Media Industry Newsletter.

Mr. Sanchez, the Say Media CEO, said Ms. Kelleher's expertise and background fit well with the company's direction. "It's that intersection of Madison Avenue and Silicon Valley that 's really where I see media going," he said.

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