Taxi wars heat up: Uber rival Lyft valued at $2.5B By: CNBC.com News March 12, 2015 at 05:06 AM EDT Armed with capital and the backing of a big Japanese company, U.S. ride-sharing app Lyft has been valued at $2.5 billion as it looks to take on Uber. Read More >> Related Stocks: Alibaba Group Holding Ltd Baidu.com SP ADR Rakuten Group Inc ADR