Multi-provider address validation for Shopify, Shopware & WooCommerce
Address Validation iO connects your shop to Loqate, Smarty, Google Address Validation, Postcode.eu and more. You decide which provider, under which GDPR terms, works best for you in each destination country. Test the providers with A/B tests on your real orders and keep what works for your customers.
Free plan · First 500 validations free · $0.045 per verified order · Extendable with individual add-ons
Runs on
Validation provider per country
Nordlicht Mode setup
| Country | Provider | Backup | Mode |
|---|---|---|---|
| Germany | Postcode.eu | Loqate | Balanced |
| Austria | Postcode.eu | Loqate | Balanced |
| Switzerland | Loqate | Strict | |
| Netherlands | Postcode.eu | Smarty | Strict |
| All other countries | Loqate | Balanced |
A/B test · Germany
Postcode.eu vs Loqate
10 % of new ordersExample data
In use at
The problem
Postcode.eu
14
Postcode.eu: official address data in 14 European countries
Google Address Validation
40
Google Address Validation: 40 countries and regions
Smarty
249
Smarty: 249 countries and territories, US addresses checked against USPS data
Loqate
~250
Loqate: about 250 countries and territories
Email verification
4
Email verification: the Offline Check plus Bouncer, Loqate and Amazon SES. Each one detects something different.
Apps with a single provider or a fixed, rigid setup force a compromise. On top of that, a provider's quality relative to others can change at any time. Address Validation iO picks the best provider for each country and a backup provider when the first one fails or is unsure. The same goes for email addresses: Bouncer, Loqate and Amazon SES don't detect the same things. You can test this setup with your customers at any time and find the best fit for your individual customer base.
How it works
A recommended setup for every country out of the box. Or choose your own provider, backup provider and validation strictness (Strict / Balanced / Loose) per country.
Addresses are checked in checkout (Shopify Plus) and on every order afterwards, including express checkouts (PayPal, Apple Pay, Google Pay). On Shopify Plus, Address Validation iO suggests complete addresses while the customer types.
Your own rules and a free pre-check run first. The pre-check catches a missing house number, a Packstation without a Postnummer, PO boxes, and an email or phone number in an address line.
Analytics, savings, tracking of problems that slipped through, AI summaries and provider A/B tests show which setup works best.
Test, don’t guess
A/B-test providers on your own new orders. Pick two or three providers and the countries to test, set a share and a budget, and let real addresses decide.
Your current providers still decide every order. The test only shows how the others would have answered.
Example data
Backtest a provider on orders that slipped through
Test any address live before your customers do
Compare email and phone checks side by side (20 free tests per day)
In checkout
Catch errors before payment – on every Shopify plan. With Plus, Address Validation iO also checks live with your provider.
Basic · Grow · Advanced
per country
checked per country
per address line
block per country
APO/FPO, emojis, non-Latin characters
invalid or disposable*
Built on Shopify Functions – no theme code.
* Disposable addresses only with email validation enabled.
Shopify Plus
from postal data, in 14 countries
above the pay button
optional, if unconfirmed
right in checkout
Shopify only offers checkout extensions on Plus.
Without Plus, customers correct after purchase: on the thank-you and order status pages and via correction email.
Additional restrictions apply to some Shopify APIs and plans.
Features
The best provider for each country, with an automatic backup when it fails or is unsure.
Including express checkouts, drafts, POS and custom channels – one at a time or up to 250 orders at once.
On the thank-you and order status pages, in the customer account or on an Address Validation iO correction page in your theme, including classic customer accounts. In 6 languages.
Up to 5 reminders, sent from your own domain (DKIM), optionally with a copy to you and your own reply-to address.
You decide until when customers can change their address – until the order reaches a certain status (e.g. “In progress”) and/or up to 60 days after the order. Shipped orders are always locked, and no more reminders go out after that.
Hold invalid orders and release them automatically.
Mailbox, disposable and shared-inbox checks, plus line type and carrier for phone numbers.
EU-hosted summaries with concrete next steps. No personal data leaves your store.
90-day logs with CSV export.
Triggers, an action and five templates.
Hydrogen, Next.js and custom frontends.
Savings
The same cost calculator you find inside the app.
Net savings per month
$555
Estimate. Your numbers will differ.
Coverage
Combine providers and every country gets the best level among them. See house-number, street and postcode coverage for each provider on the interactive map.
Integrations
The full app, live on the Shopify App Store.
Native app for Shopware 6. Install from the store, no API key.
Native plugin for WooCommerce. Install from the plugin directory, no API key.
Hydrogen, Next.js and custom frontends, via the widget.
TypeScript and PHP clients with an API key, for validations in your own systems.
Use the API SDK to validate addresses when orders are imported into the ERP or contacts are created in the CRM, using the same routing, rules and providers.
Privacy and trust
Pricing
FAQ
No. On every plan you get the checkout rules (house number, postcode format, character limit, PO boxes and parcel lockers, your own blocking rules, invalid and disposable email addresses), validation of every order after purchase, and correction on the thank-you and order status pages and by email. Only provider validation in checkout, address suggestions while typing and email validation in checkout need Shopify Plus.
No. Address Validation iO handles every provider and you get one bill (on Shopify, via your Shopify invoice).
Yes: one order at a time, up to 250 orders at once from the order list, or with the Shopify Flow action.
No. There is no theme code. The checkout check runs in the background, gives up on a provider after 1.5 seconds and never stops the customer. Everything else runs after the order is placed.
Yes. PayPal, Apple Pay and Google Pay addresses are checked when the order is created. If needed, the customer gets a correction notice and email. Blocking checkout rules also apply in Shop Pay, Apple Pay, Google Pay and PayPal. If a customer starts the wallet on the product or cart page, Shopify sometimes shows only an unclear message, or none at all, when checkout is blocked. If that matters more to you than the block, you can hide these buttons in your theme settings. Address Validation iO never changes your theme.
Yes, on Shopify Plus in 14 countries: Netherlands, Belgium, Germany, Luxembourg, Austria, Switzerland, France, United Kingdom, Spain, Denmark, Norway, Finland, Sweden, Italy. In other countries, checkout shows no suggestions while Address Validation iO is selected as the provider. Suggestions while typing are free. If the customer picks an address, it costs the same as a verified order, and the order is not validated or billed again afterwards.
For addresses: Loqate, Google Address Validation and Postcode.eu. For emails: Bouncer, Amazon SES and Loqate. For phone numbers: the offline check, AWS Carrier Lookup and Loqate. Address Validation iO recommends a provider, mode and backup for each country, and you can change any of them.
Yes. The Free plan has no monthly fee — you only pay $0.045 per verified order, plus optional email checks ($0.02) and phone checks ($0.01). Your first 500 verified orders are free.
No. Every address validation costs $0.045 per verified order, every email check $0.02 and every phone check $0.01 — whichever provider Address Validation iO uses for the country.
An order whose address was checked by a provider. Each order is billed once, however often it is re-checked. Suggestions while typing are free. If a customer picks a suggested address, it is billed like a verified order; the order itself is not billed again afterwards.
If an address, email address or phone number was already checked in your store in the last 30 days, it is billed at 50 % less.
Validation pauses until the next billing period or until you raise the cap. Your usage never goes above it.
Yes. Test checks are billed like a verified order and count toward your spending cap. The test pauses when its own budget is reached.
On Shopify, all charges appear on your Shopify invoice. Prices are in USD, excluding taxes.
Order data is stored on AWS in Frankfurt and the app runs on Vercel in Frankfurt. Addresses only go to the provider that checks them. Order records are kept for 180 days and logs for 90 days. All store data is deleted about 48 hours after you uninstall the app.
Yes. There is an app for Shopware 6, a WooCommerce plugin, a platform API with TypeScript and PHP clients, and a widget for Hydrogen and Next.js storefronts.
No. Install the app or plugin and you’re ready. API keys are only needed for custom shops via the Platform API.