24 Shopify apps rank for checkout validation in App Store search. Here they are in order, with what merchants think of each one and what it costs to start.
Rankings last updated 6 September 2026. Shopify stopped allowing its search page to be read on 6 September 2026, so the positions on this page are no longer refreshed. Everything else — each app's rating, review count and pricing — still comes from our daily crawl.
Market
36/100
Difficulty
24/100
Established rivals
9
Avg. rating, top 10
4.93★
Positions from our own crawl of App Store search on 2026-08-25.
Where does your app rank for “checkout validation”?
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BoomGate: Checkout Validation
AI-powered checkout validation, payment and delivery customization for Shopify. 70+ conditions, templates, import/export. Create rules in plain English.
King Checkout Validation
Block checkout with address validation and order limits. Check PO boxes, missing house numbers and VAT formats. Build custom checkout rules with clear errors.
Cart Block: checkout validator
CartBlock blocks purchases and orders based on criteria like country, product quantity, customer profiles, discount code and more also with Captcha
Payflow: COD & Checkout Rules
Add Cash on Delivery fees, customize payment or delivery methods, and create checkout validations using rules based on cart, customer, product, address and more
SMART Checkout Upsells & Rules
SMART Checkout Rules helps merchants control the checkout experience using flexible conditions. Validate checkout or hide, block, sort, or rename p...
Blockit: Checkout Rule
Checkout validation for Shopify stores. Block P.O. boxes and prevent invalid orders, set order limits by product or amount, and reject misused discount codes.
Ninja Address Validation
Shopify address validation app. Block missing house numbers, PO boxes, bad postal codes & special characters at checkout. Stop bad orders. Free plan available.
Checkout Rules & Discounts
Easily customize your Shopify checkout with advanced rules to validate checkout, hide, rename, or reorder payment rule and delivery methods, and offer discounts
Blockify Checkout Customizer
Boost revenue with dynamic checkout extensions. Stop losing customers right at the finish line.
Bony: Checkout Rules & COD
Hide payment methods, rename the shipping methods, prevent unwanted orders with powerful conditions
Kedra Checkout Rules & Upsells
Checkout customization made easy: create rules with the AI assistant and 80+ conditions. Hide, rename or reorder payment and shipping methods. Vali...
Dibs – Preorders & Backorders
Pre-order & backorder app for sold out & out-of-stock items. Preorder deposits, split payments, coming soon badges, presales, inventory tracking & reminders.
Locksmith
Access control for the Online Store channel. Lock any content; grant access with passcodes and more.
VOL Surcharge Fee & Extra Fees
Charge product fees, payment fees, import duties, surcharges, customs fees and tariffs across cart, checkout, POS and draft orders with flexible rules for B2B.
BlockCart: Checkout Validation
Block invalid Shopify orders with no-code cart and checkout rules. Set order limits, restrict products by ZIP code, enforce B2B rules, and show clear errors.
SMART Functions Creator
Build advanced Shopify Functions for tiered discounts, BOGO, bundles, promos, volume discounts functions, payment customizations, delivery customiz...
RUBIX Cash On Delivery‑COD Fee
Limit Cash on Delivery with Conditions: Set specific conditions for COD eligibility, such as a minimum order amount or a maximum purchase limit
NovaPay Checkout Rules
Create conditional rules for payment and shipping methods, discounts, and checkout validation using cart, customer, product, and location data.
Simesy Checkout Rules
Maximize checkout conversion with powerful payment rules. Sort, rename and hide payment methods to offer your customers idea payment methods. Hide ...
CartWisp: Checkout Validation
Prevent invalid orders with CartWisp Checkout Validation. Enforce MOQ, buyer eligibility, product restrictions, shipping controls, and payment rules.
BM Bot blocker Country blocker
BM: Country Blocker IP Blocker helps merchants control who can access their store and prevent unwanted visitors before they place an order. Merchan...
Pareto ‑ Order Limits Quantity
Pareto lets you set order limits and a max quantity per customer on any product, so no one can bulk buy your drops, flash sales or freebies. Limit ...
Lockdown: Cart/Checkout Rules
Create checkout validation rules to block risky orders. Restrict by cart value, products, location, customer type, and more. Free Shopify app with no coding.
Checkmate ‑ checkout validator
Checkmate Pro allows stores to set conditions for cart and checkout validations without having to use any custom code. Using Checkmate Pro, Shopify...
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