A small, deep team focused on payment integrations — nothing else.
We are not a generalist agency that also touches payments. We have one craft, and we run every engagement against the same boring, predictable pipeline so the wins are repeatable.
CheckoutBuilders was put together by engineers who have spent enough time in payment dashboards to be opinionated about how this work should be done. The premise is simple: most teams ship a checkout once and then patch it forever, and they do not need a permanent payments specialist on the payroll — they need someone to come in, do it right, and leave a written record.
So we built CheckoutBuilders as a one-time-purchase service. You pick a scope, you pay once, you get a date. We deliver the integration, the webhook handlers, the refund flow, the test-card guide, and the reconciliation report. If we missed the brief, you get your money back.
We work with Stripe, PayPal, Razorpay, and Paddle — the four gateways that cover the vast majority of online businesses. We use each gateway’s official server SDK and hosted-fields UI components, which keeps your PCI footprint tight and gives you the latest 3D Secure / SCA flow without custom work.
Five rules we do not break.
01
Sandbox before live
No live key gets near production until every relevant test card and webhook event has been signed off in sandbox.
02
Webhooks first
Webhooks are the source of truth. Idempotent processing, signature verification, and queue-backed retries — every time.
03
PCI scope kept tight
Default to gateway-hosted card fields (Elements, Smart Buttons, Razorpay Checkout, Paddle Overlay) so you stay in SAQ-A.
04
No live credentials kept
We work in your sandbox until launch day. You generate live keys and rotate them after we hand off.
05
Tell the truth
If a plan does not need everything in it, we tell you. If a gateway is wrong for your case, we say that too.
Ready when you are.
A short brief, a payment, and your gateway preference is all we need to start. We do the rest.