https://www.outseta.com/ is the best tool I've seen that offers everything you listed.

Wow! That's it!

It just looks like they are offering there services mostly for non-developers (low-code / no-code) and I couldn't find anything about whether they have an API that I can use from my own code to check for registered users and if they paid etc.

EDIT: nevermind, found it: https://documenter.getpostman.com/view/3613332/outseta-rest-...

> as a solo developer it takes considerable time to connect all these together

Well hopefully it you’re a developer it doesn’t take that long. I just switched a SaaS to Stripe from PayPal last week and it took less than 30 minutes. These SaaS support tools/websites are increasingly easy to use, making time to market for even a solo dev pretty easy.

Search for SaaS skeleton or boilerplate. Examples:

https://www.saaspegasus.com/

https://usegravity.app/

https://buildasaasappwithflask.com/

https://bullettrain.co/

https://www.saasforge.dev/

https://nodewood.com/

https://mernkit.com/

That all requires me to setup my own infrastructure (such as a database) which I'd like to avoid. Otherwise yeah, the list isn't bad!

I can't speak to the others in the list, but I'm building Nodewood, and I have heard this worry from other people as well! Consequently, one of the features I'm working on is a deploy process that can target different cloud providers and set up VMs, managed databases, etc for you.

I feel your pain personally, as well, so I built and already have an Ansible script I use to deploy Nodewood.com, but it turns out that Ansible doesn't play well on Windows, so while I'm happy to make it available to customers, I can't really justify making it the default deploy method.

Stripe is incredibly good. And then there's stuff like Laravel Spark which handles all the common stuff like accounts and invoicing.

Sounds like I have to install/maintain stuff here myself. I wish there was a solution that doesn't require me to have any additional infrastructure...