Custom Subscription & Billing Platform Development Services for SaaS & Enterprise Businesses

We love Stripe and use it constantly. However, Stripe Billing is an API; it still requires significant engineering to integrate into your app, build a customer portal, handle your specific business logic, and ingest metered usage data. For complex enterprises, Stripe is the payment rail, but the *billing engine*—the logic that dictates *what* and *when* to charge—must be custom-built to match your unique operations.

Proration math is notoriously difficult. We build robust backend logic that calculates the exact time remaining in the billing cycle, applies credits for unused time on the old plan, and calculates the new charge down to the second, ensuring seamless transitions without manual intervention.

Yes. We build systems that generate professional invoices, track outstanding balances, automatically send reminders, and allow clients to pay via credit card, ACH, or wire transfer, with automatic reconciliation in your database when payment is received.

We build decoupled, event-driven architectures. The system that records usage (e.g., an API gateway recording a call) drops the event into a resilient message queue (like Kafka). A separate worker process aggregates that data and writes it to the billing database. If the billing database goes down momentarily, the queue holds the data, ensuring zero revenue leakage.