In September 2011, it invested in Blekko as part of a $30 million financing round.[41][42] In November 2011, ot acquired software developer SPB Software for $38 million.[43][44] In June 2012, it acquired a 25% stake in Seismotech, for $1 million.[45][46] In December 2010, the firm launched Yandex.Start to find startups and work with them systematically, and purchased WebVisor's behavior analysis technology in December 2010.[47][48] On January 26, 2011, it introduced premium placement opportunity in its Business directory in which advertisers' local small businesses are highlighted.[49] On January 27, 2011, the company acquired single sign-in service Loginza.[50]