I've built AnonAmaze which is "ChatGPT but with Privacy".
My stack:
This combo has enabled me to quickly build an MVP which provides ChatGPT-like capabilities along with some significant value-adds including the privacy features.
I can also deploy this stack in any region with just a single small application server, and opens the door to dedicated instances for any clients who may want that.
See more about AnonAmaze including a walkthrough video on the landing page:
https://au.anonamaze.co