Tyroo is an India based online advertising network that uses proprietary targeting technology to ensure advertisers reach out to the right websites from its inventory of publishers.

Internet company Yahoo picked up at least 35% stake in Tyroo for an undisclosed amount in July 2007. Incubated by Delhi-based digital media company Smile Interactive Technologies Group, Tyroo was voted as one of the 10 most interesting startups by Business daily Mint, a part of the HT Media group.

Recently Tyroo claimed to reach 2.5 billion Ad impressions a month. According to Tyroo, its 2500 strong publisher network includes Perfspot, Facebook, About.com, SantaBanta, Smashits, Yatra, and OneIndia. The company counts Microsoft, General Motors, Pepsi, ICICI and Yahoo amongst its advertisers.