CartShield: Checkout Rules vs Puco Validation: Order Limits
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Nov 3, 2026 for CartShield, Oct 20, 2026 for Puco Validation.
The short answer
- Both list a free plan. Paid plans start at $19.99/month for CartShield and $3.90/month for Puco Validation.
- Puco Validation lists 7 features CartShield’s listing doesn’t mention, including Collection-specific, Custom messages, Customer tags.
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Free Starter
- · 1 Active Checkout Validation Rule
- · Community Support
- · Standard PO Box & Address Validation
- · Sub-5ms WebAssembly Edge Execution
Pro Protection
- · B2B wholesale carton multiples
- · Collection min and max spend limits
- · Custom checkout error messages
- · PO Box and delivery blocker
- · Priority 24/7 merchant support
- · Real-time loss prevention telemetry
Free
- · Create 1 checkout validation
- · Validation is ALWAYS applied
Pro - Early Bird 1
- · 100% setup support if needed
- · Apply based on multiple conditions
- · Create more checkout validations
- · Lifetime discount for early customers
- · Unlock all 30 different conditions
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureCartShield protects merchant profits by validating orders directly inside checkout using server-side Shopify Functions. Unlike legacy apps that rely on cart scripts bypassed by 1-click express wallets or browser tools, CartShield cannot be skipped. Prevent couriers from rejecting freight by blocking PO Boxes and parcel lockers.
Take full control of your checkout process by creating custom validation rules. Whether it's blocking bots, restricting PO boxes, or enforcing order limits, our solution ensures only valid and profitable orders go through. Ideal for stores facing issues with fraud, incorrect addresses, or unwanted orders, this app simplifies management and reduces costs.
- Block PO Boxes and parcel lockers for heavy freight and restricted items
- Require qualifying catalog items to purchase discounted sample kits
- Enforce B2B wholesale case pack multiples like cartons of 6, 12, or 24
- Validate checkout server-side across express digital wallets and one-page flows
- Tailor validation for orders with specific tags, quantities, address, 30+ more
- Block suspicious transactions and invalid addresses to reduce fraud.
- Instant checks on product, cart, and checkout pages using Shopify Functions.
- Display custom error messages in multiple positions
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 |  Puco Validation | |
|---|---|---|
| Detected stores | Not published | 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 | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | Puco Validation | |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 9 |
| New reviews, 28 days | Not enough data | 0 |
| Reviewers a year or more in | Not enough data | Not enough data |
Pricing
| Measure | Puco Validation | |
|---|---|---|
| Free plan | Yes | Yes |
| Lowest paid monthly plan | $19.99/month | $3.90/month(ahead) |
| Longest free trial | 14 days | 7 days |
| Plans listed | 2 | 2 |
Listing
| Measure | Puco Validation | |
|---|---|---|
| Shopify category rank | Not enough data | #71 |
| Shopify App Charts | Not on this week’s charts | Not on this week’s charts |
| Built for Shopify | No | No |
| Launched | Nov 3, 2026 | Aug 16, 2024 |
| Languages | 1 | 1 |
| Developer | ModApps | Puco.io |
FAQ
CartShield and Puco Validation: common questions
- Is CartShield or Puco Validation cheaper?
- Both list a free plan. Paid plans start at $19.99/month for CartShield and $3.90/month for Puco Validation. 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?
- Puco Validation lists 7 the others don’t mention, such as Collection-specific, Custom messages, Customer tags, Purchase frequency. 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 3, 2026 for CartShield, Oct 20, 2026 for Puco Validation; 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 3, 2026 for CartShield, Oct 20, 2026 for Puco Validation. 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.