"Yeah, definitely take a look at @Vapi_AI. Really good developer ergonomics. You can get started quickly, but their APIs also give you a lot of flexibility. And they've solved a bunch of the hard, low-level stuff so you don't have to worry about things like echo cancellation, picking the fastest endpoints if you're using Azure, web socket reconnection logic across different platforms, supporting WebRTC (apps, web pages) and PSTN (telephones) from the same codebase, etc etc etc."