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App Corp
Full-service software engineering
Engineering your experience…
App Corp
Full-service software engineering
Engineering your experience…
Production-grade Stripe billing for your SaaS product
A complete, production-ready Stripe integration for SaaS: subscriptions, usage-based billing, free trials, upgrade/downgrade flows, invoicing, and customer portal.
30+
Stripe integrations delivered
2 wks
Avg. implementation time
68%
Failed payment recovery rate
15+
Subscription states handled
Stripe is powerful. It's also a maze of webhooks, subscription states, proration logic, and edge cases that can eat weeks of development time if you don't know the patterns.
This specialised service delivers a production-grade Stripe integration for SaaS products: subscriptions, usage-based billing, free trials, upgrade and downgrade flows, invoicing, and customer portal setup. Every integration is built with idempotency, comprehensive webhook handling, and error recovery from day one — so your billing doesn't break at 100 customers or 100,000.
Whether you are adding paid plans for the first time, fixing an existing integration held together with duct tape, or migrating from simple payments to subscription billing, we handle the full lifecycle: audit, implement, test, ship.
Monthly and annual plans, free trials, plan switching with proration, coupon codes, cancellation flows with save offers, and a customer self-serve billing portal — everything required to generate recurring revenue on day one.
Metered billing via Stripe's usage records API for pay-as-you-go models. Real-time usage aggregation, tiered pricing brackets, and automated invoice generation based on consumption.
Stripe Checkout for quick implementation, embedded Elements for custom-branded payment forms, or a fully custom checkout UI — whichever matches your product's conversion goals.
Idempotent webhook processing for payment events, subscription changes, invoice finalisation, and failed payments. Built-in retry logic, dead-letter queues, and monitoring so no billing event is ever lost.
Automated retry logic with smart cadence, grace periods, email notifications, account suspension and reactivation, and smart payment method prompts that recover revenue without burning customer trust.
Stripe Tax integration for automated sales tax calculation, multi-currency support for global SaaS customers, and locale-aware pricing display across your product surfaces.
We audit your current pricing model, subscription states, and edge cases. Produces a comprehensive billing specification covering plan structure, trial logic, proration rules, upgrade and downgrade paths, and compliance requirements before any code is written.
Full Stripe integration: subscription creation and management, checkout flow, webhook endpoint infrastructure with idempotency, customer portal configuration, and dunning workflow setup. Built alongside your existing codebase with zero disruption to production.
Testing across every subscription state: new signup, trial period, upgrade, downgrade, cancellation, reactivation, past due, unpaid, and expired. Stripe test mode verification for all payment scenarios, card declines, and webhook replay.
Production go-live with live API keys, Stripe webhook endpoint verification, monitoring dashboard setup with alerting for failed payments and webhook processing errors, and a 90-day post-launch support period.
A fast-growing AI education platform needed to migrate from a flat monthly fee to a tiered subscription model with free trial, usage-based add-ons, and annual discount — all while 12,000+ active users were billing on the legacy system. Their existing Stripe integration could not handle proration, plan switching, or failed payment recovery.
We rebuilt the Stripe integration from the ground up with proper webhook handling, idempotent event processing, and a comprehensive subscription state machine. Implemented Stripe Checkout for new signups, a self-serve customer portal for plan management, and automated dunning with smart retry cadence.
Many of our best projects combine two or more services from the list below.
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Let's build something great
Book a free 45-minute scoping call. Walk away with a clear picture of what we would build, how long it would take, and how much it would cost — regardless of whether you move forward.
Average response time: 2 business hours. No commitment required.
"App Corp delivered a production-ready AI platform in 11 weeks that our internal team estimated would take 9 months. The architecture is clean, the docs are thorough, and the product works exactly as specified."
Emily Park
CTO, PetScreening
50+
MVPs
98%
Retention
10wk
Avg. launch