Twilio provides all of the tooling necessary to send voice calls, text messages, and emails programmatically, with a robust set of features and options, well-defined documentation, sample code in many languages, and open-source SDKs for easy integration. Cost of service is very reasonable given the complexity removed from the developer side.

Twilio is a powerful tool once you get past the learning curve, it can handle complex workflows and scale well. That said, the customer support experience leaves a lot to be desired. Response times are slow, and getting clear solutions often requires multiple follow-ups. The platform can feel harder to adopt than it should be.