The last time I ran a SaaS company, I used an external subscriptions provider and somehow managed to have 10% of my lines of code be about billing anyway. Every line of that was a waste. Stripe's new product obviates most of the cruftiness:https://stripe.com/billing
What do you mean by physical billing? Our invoices are online only! Have a look at some examples of what you can do:https://stripe.com/billing#effortless-design …