Stripe · Razorpay · Apple Pay · PCI Compliance Payment Gateway Integration

Seamless payment gateways built for trust and high checkout rates.

Eliminate payment failures and cart drop-offs. We integrate secure, multi-currency payment flows across Stripe, Razorpay, PayPal, Apple Pay, and Google Pay with rock-solid webhook reliability, automated invoices, and 3D Secure 2.0 fraud protection.

  • 100% PCI-DSS compliant architecture with tokenized payment data
  • Tested with automated sandbox and live test transactions before launch
Start a proposal A short note is enough

What payment capabilities do you need?

Select your payment requirements. We reply within one business day.

Prefer email? hello@aviancetechnologies.com

99.99%Payment webhook delivery reliability
135+Currencies supported globally
0Sensitive card numbers stored on your server
48 hrsStandard gateway integration turnaround

What we integrate

Six payment gateway solutions we implement flawlessly.

We handle the complete end-to-end transaction lifecycle, from card tokenization to webhook fulfillment and refund automation.

01

Stripe Payments, Elements & Custom Checkout

Custom embedded Stripe Elements and Hosted Checkout supporting cards, Apple Pay, Google Pay, Klarna, and SEPA debit.

Friction-free one-click checkout branded seamlessly to your website.
02

Razorpay & Indian Payment Ecosystems

Complete Razorpay integration featuring instant UPI intent, dynamic QR codes, Netbanking from 50+ banks, and automated GST invoices.

Fast mobile checkout optimized for Indian shoppers and global exports.
03

Recurring Subscription Billing & Dunning

Automated monthly/annual recurring billing with grace periods, failed payment retries (smart dunning), and customer self-serve portals.

SaaS subscription engine with automated proration and upgrade workflows.
04

Resilient Webhook Handlers & Order Verification

Idempotent server-side webhook endpoints that verify cryptographic signatures and guarantee orders update even if user browsers close.

Zero missing orders or unfulfilled purchases caused by drop-offs.
05

Multi-Currency Conversion & International Tax

Automatic currency detection based on visitor IP with dynamic pricing, Stripe Tax, and localized VAT/GST compliance.

Displaying prices in USD, EUR, GBP, or INR based on user location.
06

3D Secure 2.0 & AI Fraud Prevention

Enforcing 3DS2 biometric and OTP verification with custom Stripe Radar / Razorpay Thirdwatch risk rule configurations.

Protecting your merchant account against fraudulent chargebacks.

Why Aviance

Faulty webhooks cause lost orders and angry customers. We engineer for reliability.

Many developers connect a payment gateway but fail to handle dropped webhooks, timeouts, or fraud rules. Here is how we do it.

What matters Template or generic agency An Aviance build Engineered for ROI
Webhook Reliability Order only updates if customer waits for redirect; closes window = lost order Server-to-server cryptographically verified webhooks guarantee fulfillment
Data Security (PCI) Risky form fields that touch your web server, creating PCI compliance liability 100% tokenized fields (Stripe Elements / Razorpay SDK); zero card data touches your server
Mobile Wallets Manual 16-digit card number entry required on small smartphone screens Instant Apple Pay, Google Pay, and 1-tap UPI app redirection
Failed Payment Recovery Subscription cancels instantly on first card decline, losing revenue Smart dunning retry logic with automated customer email notifications
Testing Workflow Launched without live card testing, resulting in broken live checkouts Rigorous sandbox and live $1 micro-transaction verification across devices

Strict PCI-DSS compliance

We utilize hosted fields and SDK tokens. Card data never touches your web server or database, keeping your business legally compliant.

Zero duplicate transactions

Our webhook handlers implement strict idempotency keys, guaranteeing duplicate webhook dispatches never double-charge or duplicate orders.

Fast turnaround in 48–72 hours

Need a payment gateway live urgently for an upcoming launch? We can integrate, test, and deploy verified payment flows in days.

How a payment integration runs

Secure, end-to-end payment integration deployed in 3 to 5 days.

We handle merchant account key configuration, front-end checkout UI, server webhook logic, and live test audits.

01Day 1

Merchant Gateway & Architecture Review

Reviewing your gateway accounts (Stripe, Razorpay, PayPal), compliance requirements, currency needs, and checkout flows.

Payment architecture spec and test key setup.
02Day 2

Front-End UI & Checkout Integration

Implementing responsive payment fields, Apple Pay/Google Pay buttons, localized currency selectors, and branded styling.

Visual checkout interface working in sandbox mode.
03Day 3

Server Webhook & Database Engineering

Writing idempotent webhook endpoints that handle `payment_intent.succeeded`, failed charges, refunds, and subscription renewals.

Automated database updates upon payment events.
04Day 4

Sandbox Edge-Case Testing

Simulating successful charges, 3DS challenges, declined cards, expired subscriptions, and refund flows in test environments.

Zero-error test audit across all failure states.
05Day 5

Live Production Switch & Verification

Exchanging API keys for production credentials, running a live $1 verification transaction, and issuing an automated refund.

Live, verified payment gateway accepting real revenue.

Ways to start

Clear fixed pricing for payment gateway integrations.

One-time integration fees with zero ongoing transaction markups. You pay your gateway directly for standard processing fees.

Standard Gateway Setup

From $250

Integration of a single payment gateway (Stripe, Razorpay, or PayPal) on an existing website or store.

  • Full checkout UI integration (Cards, Apple/Google Pay)
  • Secure server-side webhook handler
  • Automated email receipts & order updates
  • Live test transaction verification
Integrate A Gateway
Most Popular

Multi-Gateway & Subscription Suite

From $550

Dual gateway integration (e.g., Stripe + Razorpay/PayPal) with recurring subscriptions and multi-currency support.

  • Dual gateway routing (Domestic + International)
  • Recurring subscription billing & customer portal
  • Multi-currency IP detection (USD, EUR, INR, GBP)
  • Automated invoice generation & tax calculation
Setup Multi-Gateway & Subs

Custom Marketplace / Split Payments

From $1,100

Complex payment architecture for multi-vendor platforms, split payments, and escrow workflows (Stripe Connect).

  • Stripe Connect / Custom marketplace vendor payouts
  • Automated commission split & merchant onboarding
  • Custom webhook architecture & dispute management
  • Compliance review & automated KYC verification flows
Discuss Marketplace Payments

A recent project · Eternal Shine

Multi-currency Stripe and Razorpay payment flow with automated invoice generation.

Integrated dual payment routing that automatically detects user geography, routing domestic Indian customers to UPI/Razorpay and international buyers to Stripe.

  1. 01
    Brief

    Eternal Shine was losing international customers because their existing payment gateway only accepted Indian credit cards and failed foreign transactions.

  2. 02
    Approach

    We developed an intelligent currency router that automatically switches between Razorpay (UPI, Netbanking) and Stripe (Apple Pay, USD/EUR credit cards) with automated PDF invoicing.

  3. 03
    Handover

    Zero foreign transaction drop-offs and a 46% increase in international sales volume within the first 30 days.

Stripe + Razorpay Multi-Currency IP Zero Dropped Orders
More Case Studies

Having issues with failed payments or missing order confirmations?

Send us a description of your payment setup. We will inspect your webhook error logs and reply within one business day with the exact technical fix.

Get Payment Gateway Support

Where it shows up

Industries we ship with, and tools we use.

The stack follows the job. We use what your project actually needs.

Industries
  • E-Commerce Retail
  • SaaS & Digital Products
  • Online Education & Courses
  • Professional Services
  • Travel & Hospitality
  • Non-Profits & Donations
  • Marketplaces

Payment Gateways

Global & regional
  • Stripe (Payments, Connect, Billing)
  • Razorpay (Standard & Custom)
  • PayPal Checkout / Braintree
  • Apple Pay & Google Pay
  • Authorize.net

Front-End SDKs

Checkout UI
  • Stripe Elements
  • Stripe Hosted Checkout
  • Razorpay Checkout.js
  • PayPal JS SDK
  • React Stripe JS

Server Webhooks

Fulfillment logic
  • Node.js & Express Webhooks
  • PHP Webhook Handlers
  • Laravel Cashier
  • HMAC SHA256 Signature Verification
  • Redis Queue Retries

Compliance & Security

Trust standards
  • PCI-DSS Level 1 Hosted Fields
  • 3D Secure 2.0 (3DS2)
  • Stripe Radar Fraud Detection
  • TLS 1.3 Cryptography
  • Tokenized Payment Vaults

FAQ

Frequently asked questions about payment gateway integration.

Pricing, delivery timelines, platforms, technical specifications, and post-launch support.

Get A Free Quote
01Which payment gateway is best for my website — Stripe, Razorpay, or PayPal?

The ideal gateway depends on your target customer location: Stripe is the gold standard for international transactions, supporting cards, Apple Pay, Google Pay, and localized European payment methods in 135+ currencies. Razorpay is the premier choice for customers in India, supporting UPI (Google Pay, PhonePe, Paytm), Netbanking across all Indian banks, and local debit cards. PayPal is valuable globally as a recognized alternative payment method. Many successful businesses integrate dual gateways (e.g., Stripe for international + Razorpay for domestic) to maximize conversion rates everywhere.

02How do you ensure PCI-DSS compliance so we don't get fined?

We implement 100% tokenized payment architectures using Stripe Elements or Razorpay Checkout SDKs. Under this architecture, the customer's credit card number, expiration date, and CVV are entered into secure iframe fields hosted directly by the payment processor's PCI-DSS Level 1 certified servers. Raw card numbers never touch or pass through your website server or database, keeping your business legally compliant with zero regulatory liability.

03Why do payments succeed on the gateway but orders fail to appear on our website?

This common bug occurs when an amateur integration relies on browser-side redirects rather than asynchronous server-to-server webhooks. If a customer closes their browser tab, experiences a cellular network disconnect, or has an aggressive ad-blocker before redirecting back to your confirmation page, the browser never notifies your database that the payment succeeded. We resolve this by building cryptographic server-side webhook endpoints that listen directly to the payment gateway and update orders reliably 100% of the time.

04Can you set up recurring subscription billing with customer management portals?

Yes. We integrate Stripe Billing and Razorpay Subscriptions to manage recurring monthly or annual plans. We implement customer billing portals where your clients can update credit cards, upgrade/downgrade subscription tiers, view historical invoices, and manage cancellations automatically without contacting customer support.

05How long does a payment gateway integration take?

A single payment gateway integration (such as Stripe or Razorpay) typically takes between 2 and 3 business days. More complex implementations featuring multi-currency switching, automated subscription dunning, or custom marketplace split payouts take between 4 and 6 business days. We always conduct live test transactions before handing over.

06Can you integrate Apple Pay and Google Pay onto our checkout page?

Yes! We configure Apple Pay and Google Pay via Stripe and Razorpay Payment Request APIs. Apple Pay requires domain association file verification, which we configure directly on your server. On mobile devices, this allows shoppers to complete checkouts using Face ID or Touch ID in seconds without typing 16-digit card numbers.

07How do you test payments before going live with real customers?

We perform multi-stage testing: First, we test comprehensive scenarios using the payment provider's sandbox test credentials (simulating successful charges, 3DS OTP challenges, insufficient funds, and expired cards). Once sandbox testing passes, we switch to live production keys and execute a live $1 micro-transaction with real credit cards and UPI, verify webhook fulfillment, and issue an immediate refund.

08Can our website accept payments in multiple currencies (USD, EUR, GBP, INR)?

Yes. We build multi-currency checkout architectures. We can either automatically detect the visitor's country via geolocation and display native currency pricing, or provide an interactive currency selector dropdown. The payment gateway charges the customer in their native currency and deposits the funds into your primary bank account in your preferred settlement currency.

09What is 3D Secure 2.0 (3DS2) and is it required?

3D Secure 2.0 is an authentication protocol that adds an extra layer of biometric (Face ID / fingerprint) or one-time password (OTP) verification to prevent fraud. It is mandatory in Europe under PSD2 / Strong Customer Authentication (SCA) regulations and mandatory in India for card transactions. We configure 3DS2 frictionless authentication so compliant low-risk payments pass instantly while high-risk payments prompt for verification, protecting you from chargebacks.

10Are there any ongoing transaction fees charged by Aviance?

No. Aviance charges a one-time project fee for the design, development, and testing of your payment integration. You only pay standard transaction processing fees directly to your payment gateway (e.g., Stripe's 2.9% + 30¢ or Razorpay's 2%). We take 0% of your transaction revenue.

Tell us what your project should do.

Send a few details. We reply within one business day with scope, timeline, and a number you can plan around.