For the last 8 months I have been having fun with a Developer platform for Voice AI called VAPI. I can’t express how much fun it has been. I even made a GPT which automates my entire process of creating voice assistants as well. (Right now it only talks to my account, but I am building out a proxy that talks to any account) Even though it only connects to my account account it will still give you everything you need to create your Voice Assistant.
You can check out the GPT here: ChatGPT - MyVAPI
I am also having a FREE workshop on Voice Assistants with VAPI as well: VAPI WorkShop - NoCodePrenuers