Coupa Software on Wednesday hit the top of an IPO price range that it boosted this week, raising $133.2 million. Despite that, the market cap for the San Mateo business expense management software company is $866 million going into its first day of trading. That is below the roughly $1 billion that the company was valued at by private investors a little more than a year ago. Coupa priced the 7.4 million it is selling to the public at $18 a share.