Buzzeromatic is a Seattle-based startup that has developed a smart doorbell system using Twilio's API. The service allows apartment residents to manage who can enter their building, create passwords for regular guests, and receive voice messages from delivery staff. The company's co-founder, Andres Krogh, credits Twilio's API with making it easy to build the service despite having no experience with telephony programming. Buzzeromatic has already made significant progress in a short period of time and plans to launch a closed beta soon. The company is also exploring other humanitarian projects that can be built on top of Twilio's API.