SaaS & Cloud
Subscription platforms, license servers and cloud backends on Azure, AWS and Vercel — with billing, auth and analytics built in.
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Payment Gateway Integration Services
Payment integration is the part of a project where "it works in testing" and "it works on launch day with a real customer’s card" are two very different claims. We build for the second one.
Stripe and PayPal cover most of the world and most use cases — one-time payments, subscriptions with trials and proration, saved cards for repeat customers, and webhooks that keep your database in sync with what actually happened at the processor, not just what your server hoped happened.
For customers outside where Stripe and PayPal serve well, we add regional processors — the right choice depends on your specific target countries, and we will research and recommend rather than default to what we last used.
Marketplace and multi-vendor payouts (splitting a payment between your platform and multiple sellers or contractors) are a specific, easy-to-get-wrong pattern we have built before — the failure modes around partial refunds and payout timing are exactly where generic tutorials fall short.
Security is non-negotiable and not optional scope: we never let raw card data touch your servers (PCI compliance handled by using the processor's hosted fields or SDKs correctly), webhook signatures are always verified, and idempotency keys prevent duplicate charges on retry.
This is usually an add-on to a larger build (web application, SaaS platform, or mobile app) rather than a standalone project, and it is quoted and escrow-protected the same way: fixed price, written checklist, tested with real (small) transactions before you release payment.
What's included
- Stripe & PayPal integration: one-time, subscriptions, saved cards
- Regional payment processor integration where needed
- Marketplace / multi-vendor split payments and payouts
- PCI-conscious architecture, webhook verification, idempotency
Questions people ask us
Before you write to us — the honest answers.
Is it safe — will card details touch our servers?
No, and they should not. We use the processor’s hosted card fields or SDKs so raw card numbers never pass through your backend, which is both the secure approach and the one that keeps you out of the heaviest PCI-DSS compliance scope.
Can you add subscription billing with free trials?
Yes — trial periods, proration on plan changes, dunning for failed renewal payments, and cancellation flows are all standard subscription-billing requirements we build in, the same pattern running our own Invoex web app.
We have customers in multiple countries — can one integration serve all of them?
Often Stripe or PayPal alone cover a surprising number of countries well. Where they don’t serve a market well, we add a regional processor for that market specifically rather than forcing one gateway to do a job it is not suited to.
What happens if a webhook fails or a payment is duplicated?
Webhook signature verification confirms events are genuinely from the processor, and idempotency keys prevent a network retry from charging a customer twice — both are built in by default, not an edge case we handle only if asked.
Can you build split payments for a marketplace or platform?
Yes — routing a portion of each payment to multiple sellers or contractors, with correct handling of refunds and payout timing, is a pattern we have implemented before and know the sharp edges of.
How much does payment integration cost on its own?
As an addition to a web or mobile build, typically low-to-mid four figures depending on complexity (single gateway vs. multi-currency vs. marketplace payouts). Quoted and escrow-protected like every project.
Do you test with real transactions before we pay?
Yes — small real transactions (refunded afterward) or the processor’s test mode with a full scenario walkthrough are part of the delivery checklist, so you see it actually work before final payment releases.
Related
Often paired with this service
Invoicing & Billing
Custom invoicing platforms with multi-currency billing, recurring invoices, tax handling and payment tracking — built for businesses anywhere in the world.
Explore invoicing & billing →Escrow-protected payments
Every payment integration project runs on our escrow model: your funds stay safeguarded until you approve delivery.
How escrow works →Need payment integration?
Tell us about your project — we'll reply within one business day with a plan and an escrow-protected quote.