Most recurring billing systems, including free ones, will come with the ability to send out automated invoices. However, in the subscription space, things can get complicated. SaaS, eCommerce businesses, and subscription service providers will typically need a professional grade subscription billing platform that can handle their complex invoicing needs.
For example, when managing B2B accounts, there will often be multiple users operating within a single subscription. B2C customers may have a subscription membership in addition to making regular one-time purchases with your company. In situations like these, it's wise to have detailed automated billing that accurately maps out your customer's pricing in a way that is simple to understand.