The customer support at Twilio has been absolutely the worst I've ever experienced. They continually shut down our account and numbers, claiming that fraudulent behavior has been detected (not from us, but from people trying to log into our account). When we reach out for more details they go days and days without responding to our tickets. We staked too much of our core business functionality on Twilio. We are currently looking to replace them with other options. I will absolutely never use them again.