The reason Close.io is so successful is because my other company was such a humongous failure. I learned so much from it, especially all the things I'm not going to repeat again. - Steli Efti Like this quote? Listen to the show: Hear Steli Efti share this on the episode:Steli Efti’s Stunning Start Up Struggles And Why Character Is Important In Business. Read more about Steli Efti.