After searching for weeks and many free trials of online billing and subscription platforms, we finally discovered one that blows them all out of the window.
Service Provider Pro – 

We tried so many and they were all so expensive!
Chargebee, Rerunapp, Billsby, Recurly, Chargeover, Fusebill, and many others.

For way less per month, I have a full fledged store, subscription management, built-in help desk, and integrations for me and my team. It even has a reseller integration!  I highly recommend it!
Service Provider Pro –