This is super simple, and I like that using Twilio Studio makes it easy to expand and customise.

But for just the end goal, depending on use case specifics, another option is to use Twimlets which has the added bonus of the missing voicemail to email. https://www.twilio.com/labs/twimlets

I've been thinking of building something a little bit more in depth, using Twilio Studio and Google Firebase, with proper dial-in voicemail retrieval, SMS notification, and maybe Sendgrid voicemail to email.

Does anyone has a ready-rolled Twilio Studio direct to Firebase example?