When I interviewed with Twilio, they let me know the next day I wasn't a good fit (they wanted a hardcore developer with DevOps skills, I'm a decade-long SysAdmin with some developer skills). While I was disappointed that I wasn't up to snuff for the role I had applied, to this day I still have a lot of respect for them because of how they handle people (at least from what I saw during the interview process). My hat is off to them.