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Shopify Checkout Customization App Development

Transform your Shopify checkout into a high-converting, brand-aligned experience. We build custom checkout UI extensions, payment method integrations, delivery customization logic, and post-purchase upsell flows using Shopify's Checkout Extensibility platform.

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INR 2000

Per Hour

200+

Apps Delivered

4.9/5

Client Rating

<2 Weeks

MVP Delivery

Trusted by businesses worldwide

ShopifyAmazonStripeSlackNotionVercel

Checkout Customization Capabilities We Build

Full-spectrum Shopify checkout extensibility covering every touchpoint of the buyer journey

Checkout UI Extensions

Custom banners, form fields, gift messages, loyalty point redemption, and branded checkout blocks built with Shopify's Checkout UI Extensions API for a seamless buyer experience.

Custom Payment Methods

Integrate regional payment gateways, BNPL options, cryptocurrency wallets, and custom payment orchestration logic directly into the Shopify checkout flow.

Delivery Customization

Dynamic shipping rate calculation, delivery date pickers, in-store pickup scheduling, and carrier-specific logic using Shopify Functions for delivery customization.

Post-purchase Upsells

One-click post-purchase upsell and cross-sell offers displayed between payment confirmation and thank-you page, boosting average order value by up to 25%.

Address Validation

Real-time address verification and autocomplete using Google Maps, Loqate, or custom APIs to reduce failed deliveries and improve shipping accuracy at checkout.

Checkout Analytics

Custom event tracking, funnel analysis, and conversion dashboards that measure checkout performance, drop-off points, and A/B test results for data-driven optimization.

15%

Higher Conversion

25%

More Upsells

Plus Ready

Shopify Plus

<100ms

Load Time

Our Checkout App Development Process

A proven 5-step process refined across dozens of checkout customization projects

Checkout Audit & Strategy
We analyze your current checkout flow, identify conversion bottlenecks, map Shopify Checkout Extensibility APIs, and design a customization strategy aligned with your business goals.
Extension Architecture & Design
Define the checkout extension points, plan UI placement, design Polaris-compliant components, and create interactive prototypes of the customized checkout experience.
Development & Integration
Build checkout UI extensions, Shopify Functions for payment and delivery logic, post-purchase extensions, and connect with third-party services like address validators and analytics platforms.
Testing & Performance Optimization
End-to-end testing across checkout scenarios, load testing under peak traffic, Lighthouse performance audits, and Shopify CLI validation ensuring sub-100ms extension load times.
Deployment & Conversion Monitoring
Production deployment, A/B testing setup between original and customized checkout, real-time conversion monitoring, and 30-day post-launch optimization support.

Checkout Customization Pricing

Flexible engagement models for every checkout requirement

Starter
INR 50,000starting
Single checkout extension or customization
  • One checkout UI extension
  • Basic styling & branding
  • Single payment or delivery customization
  • Development store testing
  • Source code handover
  • 14-day post-launch support
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Most Popular
Professional
INR 1,50,000starting
Multi-extension checkout overhaul
  • Multiple checkout UI extensions
  • Post-purchase upsell flow
  • Delivery customization logic
  • Address validation integration
  • Checkout analytics dashboard
  • 30-day post-launch support
  • A/B testing setup
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Enterprise
Custompricing
Full checkout transformation for Shopify Plus
  • Complete checkout redesign
  • Custom payment orchestration
  • Advanced Shopify Functions
  • Multi-market checkout logic
  • B2B checkout customization
  • Dedicated project manager
  • SLA-backed support
  • Ongoing optimization retainer
Contact Sales

What Our Clients Say

"Edesy rebuilt our Shopify Plus checkout with custom UI extensions, a post-purchase upsell flow, and regional payment methods. Our checkout conversion rate jumped 18% within the first month, and the upsell page alone generates an extra INR 4L in monthly revenue."

HO

Head of E-commerce

E-commerce at D2C Beauty Brand

"We needed address validation and delivery date selection at checkout for our furniture store. The extensions load in under 80ms and have reduced our failed delivery rate by 40%. The ROI was visible within the first two weeks."

OM

Operations Manager

Operations at Premium Furniture Retailer

"Their checkout analytics dashboard gives us real-time visibility into every drop-off point. We identified that our BNPL option placement was causing friction, moved it with a simple config change, and recovered 12% of abandoned checkouts."

GL

Growth Lead

Growth at Fashion Marketplace

Frequently Asked Questions

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Resources to help you evaluate and implement

Public App DevelopmentPrivate App DevelopmentEmbedded App DevelopmentShopify Plus AppsShopify Functions

Ready to Transform Your Shopify Checkout?

Get a free checkout audit and customization proposal. Our Shopify checkout experts will identify high-impact improvements and deliver a production-ready solution.

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Solutions

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  • AI Chatbot Development
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  • View All Services

Resources

  • Documentation
  • Voice Agent Docs
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  • Number Masking API Docs
  • Blog
  • Changelog
  • Book a Demo

Company

  • About Us
  • Contact
  • Careers
  • Privacy Policy
  • Terms of Service
  • AI Voice Assistant
  • WhatsApp Voice AI
  • WhatsApp Bot Builder
  • AI Website Chatbot
  • AI-SDR
  • Number Masking
  • Shopify Apps
  • View All Products
  • For E-commerce
  • For Healthcare
  • For Real Estate
  • For Restaurants
  • For Appointments
  • View All Use Cases
  • AI Chatbot Development
  • Voice AI Development
  • Shopify Development
  • SaaS Development
  • WhatsApp API Integration
  • View All Services
  • Documentation
  • Voice Agent Docs
  • API Reference
  • Number Masking API Docs
  • Blog
  • Changelog
  • Book a Demo
  • About Us
  • Contact
  • Careers
  • Privacy Policy
  • Terms of Service

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