When you want an AI to handle phone calls so you never miss a customer, you have two very different paths. You might look at developer tools to build a custom phone agent from scratch, or you might prefer an off-the-shelf solution ready to work today. If you have an engineering team and want to program massive outbound call campaigns, an API platform gives you endless control. But if you just need a friendly voice to answer missed calls, take messages, and maybe greet walk-in customers at a kiosk without writing code, you need an employee, not a software project.