AvidTrack, a one-stop shop for advertisers, transitioned from a buggy phone system to Twilio's reliable and scalable solution, allowing them to develop features faster and handle an increasing volume of calls. The switch was made after 6 months of struggling with their previous telecom provider, resulting in the loss of clients. With Twilio, AvidTrack has been able to hit the ground running, shipping new features and scaling quickly to meet growing demand.