[dax77]

Zuora is a well-known Enterprise-scale commercial option that displaced many others as “SaaS” took off several years ago (and its associated accounting standards).

Depending on complexity, Netsuite can address some moderate scale use cases. Stripe, Chargebee, etc address more of the SMB-scale needs.

[derekperkins]

Avoid Chargebee at all costs. I've never made an architectural decision I regretted more.