SendGrid raised $131 million in a successful IPO but the founders aren't the big financial winners (

SendGrid, the Denver-based startup responsible for sending 36 billion emails a month, completed a $131 million IPO on Wednesday. With that, SendGrid has become the first company out of TechStars to go public and the second IPO of a company backed by Dave McClure's 500 Startups accelerator seed fund. Only one of the three founders still had a big enough stake in SendGrid to be among the shareholders who own 5% or more of the company. SendGrid is one of the big startup success stories...