---
title: "Payment gateway integration services: Stripe, PayPal and more"
description: "Payment gateway integration by senior engineers: Stripe checkout, subscriptions, Connect payouts and webhooks, plus PayPal or Razorpay. Starts at $1,000."
url: https://zeroic.in/payment-gateway-integration
---

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# Payment gateway integration, from first checkout to marketplace payouts.

[Talk to a payments engineer](https://zeroic.in/book) [See the work](https://zeroic.in/work)

**Starting at**

$1,000

**Retainers from**

$4,000/mo

**Products shipped**

40+

## Where most teams are

Taking a payment is the easy part. Plans that change mid-month, payouts held until work is approved, and one checkout selling different things are where billing gets hard. We've built each of these on Stripe, and add PayPal or Razorpay where your customers need them.

Plan changes break billing → Upgrades, downgrades and proration handled

Webhooks fail and nobody notices → Webhooks that keep your app in sync

Marketplace payouts are done by hand → Stripe Connect payouts, escrow where needed

Pricing changes need a developer → Plans and prices set up to change easily

## What we build

### Subscriptions that change cleanly

Monthly and annual plans with upgrades, downgrades, cancellations and proration, all driven by webhooks, so what a customer pays always matches what they can use.

### Marketplace payouts with Connect

Stripe Connect onboarding, platform fees and payouts, with escrow where you need it, so a buyer's money is held until the work is approved and sellers are paid on time.

### Pricing that fits your model

Free plans, lifetime licences, usage pricing or milestone payments. We set up products and prices in Stripe so your pricing page can change without a rebuild.

### One checkout, several products

Courses, packages and subscriptions sold through one checkout and one wallet, so customers buy everything from a single account and see it all in one place.

## How it works

1. 01

### Pick how to work

One integration, priced upfront and starting at $1,000, or a retainer from $4,000 a month for ongoing billing work.
2. 02

### Review your setup

A senior engineer reviews your gateway setup and webhooks, and tells you what is solid, what is risky and what to fix first.
3. 03

### Build and go live

Checkout, billing and payout work, tested in test mode before real money moves. The engineer doing the work is on your calls.

Starting at $1,000

One integration, one fixed price, agreed after a short call. Single integrations start at $1,000. Need ongoing billing work? Part-time retainers from $4,000/month. Building a new product with payments in it? An [MVP Sprint](https://zeroic.in/services/mvp-development) gets a first version live in 5-6 weeks.

[Talk to a payments engineer](https://zeroic.in/book)

Jatin Mukheja rebuilt our onboarding, shipped our Zapier integrations, and wrote integrated plugins for our proprietary tools - all in record time. He ships better than we spec. This team is literally an extension of mine.

Austin Gegg

Austin Gegg CEO @ Knimble

## Work we've shipped

Marketplace · Acquired

### [Artswrk](https://zeroic.in/artswrk)

A marketplace for creative talent. We built Stripe Connect with escrow. 10k+ creators, then acquired.

AI · Prompt tools

### [Prompt Genie](https://zeroic.in/prompt-genie)

A shared prompt library. We built Stripe Elements checkout with monthly and annual plans and proration.

B2B SaaS · Client portals

### [KeepTrack](https://zeroic.in/keeptrack)

A white-label client portal: free plan, lifetime licence and milestone payments, no platform cut.

Further reading

- [Fixed-price MVP development: the scope discipline that makes it work](https://zeroic.in/blog/fixed-price-mvp-development)

## How we can help

Four ways to work with us - pick what fits, switch when it doesn’t.

From $1,000 · 1-2 weeks

### [Audits](https://zeroic.in/services/ai-audit)

Find what's broken - or whether AI is worth it - before you build.

Learn more

From $12,000 · 5-6 weeks

### [MVP Sprint](https://zeroic.in/services/mvp-development)

Zero to production in 5-6 weeks. A real product, not a prototype.

Learn more

From $4,000/mo · Recurring

### [Retainer](https://zeroic.in/services/senior-developers)

A senior engineer embedded on your team, month to month.

Learn more

From $6,000 · 2-4 weeks

### [Code Rescue](https://zeroic.in/services/code-rescue)

Vibe-coded app breaking under real users? We rebuild it to hold.

Learn more

[Compare all services](https://zeroic.in/services)

FAQ

## Frequently asked questions

How much does payment gateway integration cost?

A single integration, such as Stripe checkout or subscriptions, has one fixed price, agreed after a short call. Prices start at $1,000. Ongoing billing work runs on a retainer from $4,000 a month, month to month.

Which payment gateways do you work with?

Stripe first: Checkout, Elements, Billing and Connect. We also integrate PayPal and Razorpay, and regional gateways where your customers need them. Not sure which fits? We'll tell you on the call.

Can you build marketplace payments with Stripe Connect?

Yes. We built Stripe Connect with escrow for a marketplace connecting brands with creative talent. We set up onboarding, fees and payouts to match how your marketplace works.

Can you fix a Stripe integration that is already live?

Yes. We start by reading your Stripe setup, your webhooks and how your app stores subscription state, then fix what is out of sync before adding anything new.

Do you work with Stripe Billing and Stripe Elements?

Yes. We built a prompt library's checkout on Stripe Elements, with monthly and annual plans, and used webhooks to keep premium features in step with each subscription.

Do we own everything you build?

Yes, 100%. You own your Stripe account, code, docs and credentials.

## Hear from us within 24 hours.

**Prashant and Khushi** Partners @ Zeroic

Need payments built right? Tell us what you sell and how you want to charge for it. We'll tell you what the integration takes.

Rather talk it through? [Book a 30-minute call](https://zeroic.in/book)

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