You're on a good track looking at solutions like Auth0 and Stripe. They're both pretty easy to implement and integrating them together isn't too bad. A few com

You're on a good track looking at solutions like Auth0 and Stripe. They're both pretty easy to implement and integrating them together isn't too bad. A few companies have tried to be the all in one SaaS provider (auth + payments + etc), but I haven't seen one succeed or become prevalent. I suspect it's a combination of a few factors: 1) The individual providers like Auth0, Stripe, and their competition are pretty good already so there isn't a huge pain point. 2) As a company grows, there is business value in being able to switch third party providers for a variety of factors such as missing features and cost savings. Having everything tied into one platform makes this much harder.