AddressGuard Address Validator vs PO Box Shipping Carrier Guard
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 11, 2026.
The short answer
- AddressGuard Address Validator lists 7 features PO Box Shipping Carrier Guard’s listing doesn’t mention, including Address validation, Custom messages, Email notifications.
Head to head
- United States
- Australia
- Netherlands
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureAdd real-time, carrier-validated address verification to checkout - or replace Shopify’s Google Autocomplete with our Autocomplete. Our address validator validates against global and local carriers and uses AI Autocorrection to fix small errors (Rd→Road), prevent failed deliveries, and cut correction fees (many carriers charge $25+). Create rules to block PO Boxes or require apartment numbers.
UPS, FedEx, DHL and other couriers can't deliver to PO boxes, so those orders bounce back or need a costly fix. PO Box Shipping Carrier Guard checks the address at checkout and asks for a street address when the chosen shipping option can't reach a PO box. Choose which of your shipping options go by mail, like USPS, and customers can still use a PO box with those. Prefer no PO boxes at all? Block them everywhere.
- Prompt customers to fix addresses when issues are detected and offer suggestions
- Prevent undeliverable addresses by carrier (PO Boxes, Missing house #, etc)
- Automatically “hold” orders that are undeliverable before they get sent to a 3PL
- Improve customer data accuracy with Email & Phone Number Verification
- Blocks PO box addresses at checkout for courier shipping options
- Allows PO boxes with USPS and other mail services you choose
- Finds your shipping rates and suggests which ones ship by mail
- Block all PO boxes or allow them everywhere with one setting
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  AddressGuard Address Validator | |
|---|---|---|
| Detected stores | 89 | Not published |
| Net store change, 28 days | 0 | Not enough data |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Apparel & Accessories, Health & Beauty, Food, Beverages & Tobacco | Not published |
| Top store countries | United States, Australia, Netherlands | Not published |
Reviews
| Measure | AddressGuard Address Validator | |
|---|---|---|
| App Store rating | 4.7 ★ | Not published |
| App Store reviews | 41 | Not published |
| New reviews, 28 days | 1 | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | AddressGuard Address Validator | |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | No monthly plan listed |
| Longest free trial | Not listed | Not listed |
| Plans listed | 1 | Not published |
Listing
| Measure | AddressGuard Address Validator | |
|---|---|---|
| Shopify category rank | #43 | Not enough data |
| Shopify App Charts | #21 in Shipping | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Jun 29, 2022 | Nov 11, 2026 |
| Languages | 1 | 1 |
| Developer | Address Guard | David Warwick |
FAQ
AddressGuard Address Validator and PO Box Shipping Carrier Guard: common questions
- What features does each app list that the other doesn’t?
- AddressGuard Address Validator lists 7 the others don’t mention, such as Address validation, Custom messages, Email notifications, Label customization. PO Box Shipping Carrier Guard lists 1 the others don’t mention, such as Shipping rules. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Nov 11, 2026; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Nov 11, 2026. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.