AddressGuard Address Validator vs BoxGuard: PO Box Blocker
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 22, 2026 for AddressGuard Address Validator, Nov 3, 2026 for BoxGuard.
The short answer
- Only BoxGuard lists a free plan.
- AddressGuard Address Validator lists 7 features BoxGuard’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
Free Plan
Pro Plan
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.
Carriers like FedEx and UPS cannot deliver to PO Boxes, causing returned packages, reshipment expenses, and address correction penalties. BoxGuard validates shipping addresses directly within Shopify Checkout before payment is processed. You can restrict PO Boxes, military APO/FPO addresses, parcel lockers, and custom keywords, while setting custom error prompts.
- 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
- Block PO Boxes and parcel lockers in real time at checkout.
- Restrict military APO/FPO destinations and custom address keywords.
- Customize error messages to prompt buyers for a valid street address.
- Exempt trusted customer tags or apply rules to specific product tags.
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 | 34 | Not published |
| Net store change, 28 days | 0 | 0 |
| 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, Vehicles & Parts | Not published |
| Top store countries | United States, Australia, Netherlands | Not published |
Reviews
| Measure | AddressGuard Address Validator | |
|---|---|---|
| App Store rating | 4.8 ★ | Not published |
| App Store reviews | 54 | 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 | Yes |
| Lowest paid monthly plan | No monthly plan listed | $9.99/month |
| Longest free trial | Not listed | 7 days |
| Plans listed | 1 | 2 |
Listing
| Measure | AddressGuard Address Validator | |
|---|---|---|
| Shopify category rank | #38 | Not enough data |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | Yes | No |
| Launched | Jun 29, 2022 | Oct 31, 2026 |
| Languages | 1 | 1 |
| Developer | Address Guard | Mad Syntax |
FAQ
AddressGuard Address Validator and BoxGuard: common questions
- Is AddressGuard Address Validator or BoxGuard cheaper?
- Only BoxGuard lists a free plan. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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. BoxGuard lists 2 the others don’t mention, such as Cart alerts, Checkout alerts. 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 Oct 22, 2026 for AddressGuard Address Validator, Nov 3, 2026 for BoxGuard; 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 Oct 22, 2026 for AddressGuard Address Validator, Nov 3, 2026 for BoxGuard. 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.