Homegrown microblogging platform Koo is confident of achieving its target of 100 million users by the end of this year. “The downloads are still at a very healthy pace. The spike is not as big as it was some time back but it’s healthy growth. We have crossed about 4.5 million downloads and we want to get to 100 million by the end of the year,” Koo co-founder Mayank Bidwatka said.