GateKeeper: State/ZIP Blocker vs PO Box Blocker Pro
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 14, 2026 for GateKeeper, Nov 8, 2026 for PO Box Blocker Pro.
The short answer
- Paid plans start at $4.99/month for GateKeeper and $2.99/month for PO Box Blocker Pro.
Head to head
- Canada
- United States
GateKeeper
- · Block checkout by state, ZIP or country
- · Limit payment methods by destination
- · Maintained rulesets with citations
- · Optional 18+ or 21+ age gate
- · Restrict all products or only tagged
- · Your own message shown at checkout
Essential
- · Auto health checks & self-repair
- · Block addresses FedEx, UPS & DHL reject
- · Built-in address tester
- · Custom checkout message
- · One-click automatic setup
- · Real-Time PO Box Blocking
Pro
- · Everything in Essential
- · Exempt products, variants, collections
- · PO boxes, lockers, bags & APO/FPO
- · Priority email support
- · Rules by country, state, city & postal
- · Unlimited orders and validations
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureGateKeeper blocks orders shipping to US states or ZIP codes you restrict. Rules run inside checkout as a validation function, so customers cannot bypass them. Restrict all products, or only products with specific tags, and add large ZIP code lists: one rule can cover every US ZIP code. When an order is blocked, the customer sees a message you write.
PO Box Blocker Pro checks each shipping address at checkout and blocks addresses you can't deliver to before the order is placed. Block PO boxes, parcel lockers, locked bags, private bags and APO/FPO addresses, or restrict delivery by country, state, city or postal code. Allow chosen products, variants or collections to bypass the rules, set a custom checkout message, and test any address before going live.
- Block checkout by US state, ZIP code, or country
- Blocking cannot be bypassed by customers at checkout
- Restrict all products or only products with chosen tags
- Add unlimited ZIP codes with no size limit
- Automatically detects and blocks PO Box addresses during checkout.
- Allows merchants to exempt specific products from PO Box blocking.
- Customize the message shown when customers enter a PO Box address.
- Works seamlessly with Shopify Checkout and doesn’t require any theme edits.
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 |  GateKeeper |  PO Box Blocker Pro |
|---|---|---|
| Detected stores | Not published | 3 |
| 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 | Not published | Home & Garden, Business & Industrial |
| Top store countries | Not published | Canada, United States |
Reviews
| Measure | GateKeeper | PO Box Blocker Pro |
|---|---|---|
| App Store rating | Not published | 1.0 ★ |
| App Store reviews | Not published | 1 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | GateKeeper | PO Box Blocker Pro |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | $4.99/month | $2.99/month(ahead) |
| Longest free trial | 14 days | 14 days |
| Plans listed | 1 | 2 |
Listing
| Measure | GateKeeper | PO Box Blocker Pro |
|---|---|---|
| Shopify category rank | #114 | #276 |
| Shopify App Charts | Not on this week’s charts | #3 in Shipping solutions - Other |
| Built for Shopify | No | No |
| Launched | Jul 27, 2026 | Jul 4, 2025 |
| Languages | 1 | 1 |
| Developer | Veryation | Dev Kit |
FAQ
GateKeeper and PO Box Blocker Pro: common questions
- Is GateKeeper or PO Box Blocker Pro cheaper?
- Paid plans start at $4.99/month for GateKeeper and $2.99/month for PO Box Blocker Pro. Shoplist compares base prices only between monthly plans in the same currency; usage charges and annual plans vary, so check each plan’s limits.
- 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 14, 2026 for GateKeeper, Nov 8, 2026 for PO Box Blocker Pro; 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 14, 2026 for GateKeeper, Nov 8, 2026 for PO Box Blocker Pro. 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.