WebChoosing a payment gateway: Stripe, PayPal, Adyen and more
How to choose a payment gateway: Stripe, PayPal, Adyen, Checkout.com and regional providers compared on coverage, payment methods, PCI scope and webhooks.
Bilal Khursheed7 min read
Service
Payments and billing that stay correct when things go wrong
Stripe, PayPal and regional payment gateways integrated for checkout, subscriptions and invoicing.
The problem
Where teams get stuck.
Payments are unforgiving. Missed webhooks, proration bugs and poor handling of failed payments lose revenue quietly.
The checkout page is rarely what breaks in production. The trouble is in duplicate events, retries and keeping your database in step with the payment provider.
You need billing that is correct, tested and reconciled, not only wired to the happy path.
Our approach
What makes this work.
- 01
Model the billing
We map your plans, pricing, trials and edge cases before writing code.
- 02
Integrate
Checkout, Billing and the Customer Portal wired into your product.
- 03
Harden the webhooks
Idempotent handlers, signature verification and reconciliation against the gateway as the source of truth.
- 04
Recover and report
Failed-payment recovery, invoicing and revenue reporting.
Delivery process
How we deliver it, step by step.
Every engagement follows the same seven stages, from requirements to post-launch support.
- 01
Discovery & requirements
Workshops with your stakeholders to define goals, users, scope and constraints, captured in clear written requirements.
- Goals and success measures
- Requirements and user stories
- Scope, estimate and roadmap
- 02
UX & UI design
User flows, wireframes and interface design, reviewed with you until the product feels right before it is built.
- User flows and wireframes
- Interface design
- Clickable prototype
- 03
Architecture & planning
Data model, system design, integrations and security are settled, and the work is broken into sprints.
- Architecture and data model
- Technical decisions on record
- Sprint plan
- 04
Development
Short iterations with code review on every change and a demo of working software each week.
- Weekly demo
- Shared board and written updates
- Reviewed, version-controlled code
- 05
QA & testing
Manual and automated testing across functionality, devices, APIs and performance, followed by user acceptance testing.
- Test plan and test cases
- Automated regression suite
- UAT support and sign-off
- 06
Deployment & launch
Release through a CI/CD pipeline onto monitored cloud infrastructure, with a go-live checklist and rollback plan.
- CI/CD pipeline
- Monitoring and alerting
- Go-live checklist
- 07
Hypercare & support
Close monitoring and priority fixes straight after launch, then ongoing support, maintenance and improvement.
- Hypercare period
- Support under agreed response times
- Improvement backlog
Deliverables
What you receive.
- Subscription and usage-based billing
- Stripe Checkout, Billing and Customer Portal
- Dependable webhook handling and reconciliation
- Proration, upgrades, downgrades and trials
- Failed-payment recovery and dunning
- Tax, invoicing and reporting integration
- Test coverage for the billing edge cases
Technology
What we build it with.
- Stripe
- Next.js
- Node.js
- NestJS
- PostgreSQL
Related work
Where we have done this before.
PropTech SaaS
Client name withheld
A GIS zoning platform that turns research into instant reports
A map-based real-estate zoning product with paid on-demand reports, role-based dashboards and deep search.
Our co-founder worked on this product as a full-stack engineer. It is not a CodeBaxh-led build.
- Next.js
- NestJS
- Stripe
- Mapbox
SaaS
Client name withheld
A multi-tenant SaaS MVP, from brief to launch
Tenant isolation, subscription billing, role-based access and a customer dashboard, ready for real users on a tight timeline.
- Next.js
- NestJS
- PostgreSQL
- Stripe
From the blog
Related guides.
What we have written about payment gateway integration: cost, timelines and the trade-offs behind each decision.
- Web
SaaSHow long does it take to integrate Stripe?
Realistic Stripe integration timelines: 3–5 days for one-off payments, 2–3 weeks for subscriptions, 4–6 weeks for usage-based or marketplace billing.
Bilal Khursheed6 min read
SaaSStripe vs Paddle vs Lemon Squeezy for SaaS billing
Stripe vs Paddle vs Lemon Squeezy for SaaS: merchant of record vs payment processor, sales tax and VAT, fees, payouts, and which fits your business.
Bilal Khursheed9 min read
- SaaS
How to add subscription billing to your SaaS with Stripe
Stripe subscription billing for SaaS: what to do in each subscription state, webhook idempotency and ordering, proration examples, and dunning that works.
Bilal Khursheed9 min read
FAQ
Payment Gateway Integration: common questions.
Can you set up subscription billing with Stripe?
Yes. Plans, trials, upgrades and downgrades with proration, the Customer Portal and usage-based billing, all backed by dependable webhook handling.
How do you handle webhooks reliably?
With idempotent handlers, signature verification, retries and reconciliation against Stripe. A dropped or duplicated event should never corrupt your billing state.
Do you handle failed payments and dunning?
Yes. We implement retries, dunning emails and grace-period logic to recover failed payments and reduce involuntary churn.
Can you fix a Stripe integration someone else built?
Yes. We audit the current integration, compare your records with Stripe, and fix the gaps in order of risk.
Do you work with payment providers other than Stripe?
Stripe is where most of our billing work sits. If another provider suits your market or business model better, we will say so during discovery.
Discuss your Payment Gateway Integration project with us.
Share a short brief and we will reply with next steps, usually within one working day.