citysearch.bmpCitysearch, the division of IAC focuses on local reviews of restaurants and other services, has acquired the struggling local review start-up, Insider Pages.

The purchase (amount undisclosed) comes at a time of increasing competition in the race to deliver a compelling local search services. Citysearch’s parent, IAC, has already bolstered its local search offerings, namely with Ask City, a property that packages everything from local search to local maps, reviews, and ticket services.

However, more entrants have arrived to nip traffic away from Citysearch, an early player that has seen its traffic stagnate in recent months. There’s Yelp, Judysbook and Backfence, for starters. Earlier today, we mentioned new competitor, another company going after the local community news and events area.

Anne Raimondi, vice president of marketing at Redwood City’s Insider Pages, just informed VentureBeat of the purchase, which will be announced tomorrow. We mentioned the rumor last week.

Insider Pages has about 600,000 user reviews, and they’ll be integrated into the Citysearch’s offering, she said. It has 2.5 million monthly unique readers, she said, based on Comscore and internal tracking numbers.

She would not say whether the purchase price was more than $10 million invested in the company by Sequoia Capital, Softbank and Idealab. She said there were multiple bidders, but that Insider Pages preferred Citysearch because it is complementary. Insider Pages is popular among suburban parents and homeowners, she said, giving it strength in the home, garden, health and plumber review areas. Citysearch is stronger in bars, arts and entertainment. Citysearch will absorb Insider Page employees in its San Francisco office.

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