Offer the delivery options customers want
Turn your checkout into a conversion engine
With the arrival of Checkout Extensibility, Shopify Plus merchants can finally tailor the checkout fully to their customers. The Wuunder Checkout (formerly Paazl) extension helps you easily integrate local delivery preferences, clearly communicate delivery times, and create a checkout that converts. Personalise the final step in your checkout and stand out from the competition.
Shopify Plus provides a strong foundation.
Ambitious brands want to use their checkout more strategically.
Wuunder gives you the freedom to design delivery flows that truly match your brand, markets, and operational strategy.
- Configure shipping logic per country.
- Control how and when delivery options appear.
- Prioritize carriers based on cost, performance or SLA.
- Design a checkout experience that feels fully yours.
From carrier selection to visual presentation, you decide what customers see — and why.
This isn’t just about adding more delivery options. It’s about building a checkout that supports your growth strategy, protects your margins, and scales with you internationally.
Your checkout. Your rules. Fully optimized.
“Since connecting Shopify Plus to Wuunder, we've achieved our highest conversion rate ever.”
KARL LAGERFELD, Director E‑Commerce
Watch the replay of the Shopify Plus webinar with Karl Lagerfeld
Submit the form and we take you directly to the replay of the webinar of September 23rd
Get started quickly in just a few simple steps:
Install the extension
Enable the free Wuunder Checkout extension directly from your Shopify Plus admin.
Configure your delivery matrix
Set up smart delivery rules based on location, product type, or order value; we will guide you step by step.
Connect your systems
Integrate seamlessly with your WMS, OMS and ERP. We provide support where needed to ensure a smooth technical implementation.
Design a checkout that matches your brand
Fully customise the look and feel so the checkout aligns perfectly with your brand experience.
Test and go live
Optimise, validate and launch with confidence.
Discover what our Shopify Plus extension can do
We'll happily show you in a demo how Wuunder's Shopify Plus checkout widget can boost your conversion.
General
Q: What is the Wuunder Shopify Plus Checkout extension?
A: It's a delivery option widget built specifically for Shopify Plus merchants using Checkout Extensibility. It lets you show dynamic delivery methods, accurate delivery times, and carrier choices directly in the checkout without any custom code.
Q: How does this extension improve conversions?
A: By showing customers relevant delivery choices and clear delivery times, shoppers feel more confident completing purchases, reducing drop-off at checkout and increasing completed orders. Want to see it in action? Book a demo.
Q: What delivery options can I show?
A: You can offer home delivery, same-day options (where available), parcel shops and collection points, timeslots, nominated day and more, all dynamically displayed based on the customer's location or cart value.
Shopify Plus & Technical
Q: Do I need a Shopify Plus license to use this?
A: Yes, because this extension leverages Shopify's Checkout Extensibility framework, which is currently available only on Shopify Plus. On standard Shopify? Wuunder offers a direct Shopify integration without the checkout widget.
Q: How does this affect my store's performance?
A: The extension runs via Shopify's native framework, keeping checkout speed and reliability high. No heavy scripts or slowdowns.
Q: Does it require developer help to install?
A: Basic installation can be done quickly, but we recommend our specialists to tailor delivery logic and UI to your brand. Get in touch to discuss onboarding.
Q: How does a typical implementation and onboarding process look?
A: First, you install the Wuunder extension (freely available in Shopify's app store) directly from the Shopify Plus admin. From there, we support you with configuring carriers and delivery options. If required, Wuunder can be connected to your WMS, OMS, or ERP systems. The checkout widget is then customised to your brand and UX requirements, tested with real orders, and launched.
Q: How is support handled for Wuunder Checkout?
A: Every merchant is assigned a dedicated account manager as a primary point of contact. For critical incidents, you have access to 24/7 emergency support. For day-to-day support requests, we work with clearly defined SLAs based on type and urgency, ensuring predictable response and resolution times.
Integration & Carriers
Q: Which carriers does it support?
A: The extension integrates automatically with 100+ carriers, including PostNL, DHL, UPS, DPD and dozens of other local and international providers, without separate setup. See the full overview on our carriers page.
Q: Can I still use my own carrier contracts?
A: Yes. Your pre-negotiated carrier contracts can be integrated so delivery choices and pricing reflect your contract terms. Don't have your own contract? Get in touch and we'll tell you about our Resell options.
Q: How does data sync with my shop backend?
A: The extension integrates with your backend through the Wuunder platform, so delivery selections and carrier data flow seamlessly into your fulfilment and order systems.
Results & Benefits
Q: What sort of results do other brands see?
A: Merchants typically report lower cart abandonment and up to 70% fewer delivery support calls (WISMO) with Wuunder Track. When implementing nominated day in combination with GreenChoice, the University of Groningen validated a 30% checkout conversion uplift.
Q: Will customers see delivery times at checkout?
A: Yes, the extension shows estimated delivery dates or time windows based on merchant-specific business rules (cut-off times, warehouse locations, and origin/destination countries). We also leverage real-time API calls with carriers like PostNL, UPS, DHL and DPD. On a different platform?
Check out our integrations for Magento, Shopware, Salesforce Commerce Cloud and WooCommerce.