A software product bills three tiers plus metered API usage
A business software product offers three tiers, which are Starter at $29 a month, Growth at $99 a month, and Enterprise at a custom price. Every tier includes an API quota, beyond which each call costs $0.01. Wallet Billing renews each subscription, counts the API calls with a usage meter, and at the end of each billing period issues an invoice with the base fee plus the usage charge.
Result
The engineering team removes its own billing code, because Wallet applies plan changes, proration, and usage totals for every customer. Customers change plans themselves, while Wallet prorates each change.



