Kustom Checkout

Kustom (formerly Klarna Checkout) is the Nordics’ most-used checkout, built to make it a breeze for shoppers to buy, fully flexible to your needs and surprisingly easy to run.

Deliver a seamless, embedded checkout experience for Adobe Commerce with support for all Kustom payment methods, B2B features, and customizable design options — all in one simple integration.

Kustom Checkout helps merchants increase conversions and simplify checkout flows. With a single integration, merchants can offer all Kustom payment methods across supported markets while benefiting from a fast, embedded checkout that keeps shoppers in flow — no redirects, no drop-offs.

Key Highlights

• Full payment method coverage in all Kustom-supported countries
   
• Pre-filled addresses for a one-click checkout experience
   
• Custom checkboxes for marketing, account creation, or other actions
   
• B2B support mode with dedicated Admin configuration
   
• Shipping assistant integration
   
• Extra Merchant Data (EMD) for improved risk assessment
   
• Merchant references for accurate settlement reconciliation
   
• Flexible design options to match the store’s theme
   

Benefits for Merchants

• Increase conversions with a fast, embedded checkout that keeps shoppers on-site
   
• Unify all payment methods across supported markets through one integration
   
• Offer an enhanced shopping experience with pre-filled data and one-click repeat purchases
   
• Adapt easily with flexible design and configuration options
   
• Expand globally while maintaining local payment and compliance coverage
   

Market Coverage

• Core localized markets: AT, BE, CH, DE, DK, FI, FR, GB, NL, NO, SE, IT, ES, PT, IE, PL.
  These include local currencies, Klarna Credit, local non-risk methods, and card payments where configured.
   
• Global coverage: Accept shoppers from 170+ countries, with localization expanding from approximately 13–18 markets toward 46, enabled by the Stripe migration.
   
• Expansion roadmap: Localized checkout confirmed or planned for USA, Canada, Australia, and New Zealand. Additional European payment methods include Blik (PL), Bancontact (BE), Carte Bancaire (FR), and Twint (CH).
   

Features

• All Kustom payment methods supported in core markets
   
• Pre-filled addresses for one-click checkout
   
• Custom checkboxes for marketing and account creation
   
• Dedicated B2B mode with separate Admin settings
   
• Shipping assistant integration
   
• Extra Merchant Data (EMD) support for advanced risk checks
   
• Merchant references for settlement reconciliation
   
• Design customization (colors, borders, button styles)
   
• Seamless setup and flexible configuration in Admin
   
• Detailed logging for debugging and API requests
   

Requirements

• Adobe Commerce 2.4 (on-premise and cloud) or Magento Open Source 2.4
   
• PHP 8.1 or 8.2 (Adobe certified versions)
   
• HTTPS (SSL certificate installed)
   
• Active Kustom merchant account with API credentials
   

Compatibility

• Adobe Commerce (Cloud) 2.4
   
• Adobe Commerce (On-Premise) 2.4
   
• Magento Open Source 2.4
   

Configuration

In Adobe Commerce Admin:

Stores → Configuration → Sales → Payment Methods → Kustom Checkout

Available settings:

• Enable or disable Kustom Checkout
   
• Merchant ID and Shared Secret (credentials)
   
• Test mode or Live mode
   
• Payment methods per market
   
• Shipping countries and options
   
• Design settings (button color, header color, checkbox styles, border radius)
   
• Pre-fill options
   
• B2B mode toggle
   
• Custom checkboxes
   

Note: Adobe Commerce uses base currency only (not display currency). To support multiple currencies, set up multiple websites at the website level.

Support

Technical support: support@kustom.co

Documentation: https://docs.kustom.co

Legal

License: Apache License 2.0

Privacy Policy: https://kustom.co/privacy

Terms of Use: https://kustom.co/terms

Pricing: Free to install and download

Changelog

Version 1.0.0 (October 2025)

• Initial release of Kustom Checkout for Adobe Commerce
   
• Includes: all Kustom payment methods, one-click checkout, B2B support, shipping assistant, and pre-fill functionality

Version 1.1.0 (January 2026)

• Implemented a fix for loading orders by incremental ID. This resolves issues where an order could not be placed.
• Removed the unused endpoints previously utilized by Klarna  
• Eliminated the region selector  
• Removed API credentials for specific countries  
•  Retained only one general API credential section  
• The C/O address saving issue has been resolved; it is now correctly retrieved from the API to Magento.

Version 1.1.1 (February 2026)

• Adjusted the API endpoints to direct to kustom.co instead of klarna.com
• Changed the direct linking to Kustom's merchant portal on the admin panel
• Fixed order currency loading that could prevent order placement in some cases