CUIC ‑ CUI CHECKER vs SD ‑ Add VAT to checkout
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Apr 18, 2026.
The short answer
Head to head
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureThe Romanian CUI Validator for Shopify is a robust tool designed to ensure that customer-entered Company Unique Identification Numbers (CUI) are valid and correctly formatted according to Romanian tax regulations. This validator helps merchants reduce errors and streamline order processing by verifying the authenticity of CUIs directly during checkout or customer data entry.
Transform your B2B checkout experience with professional VAT number validation designed for European merchants. Built with Shopify's 2025-07 API and latest checkout extensibility framework, our app provides seamless real-time validation of EU VAT numbers across all 27 member states.
- Validate CUI
- Comply with FGO integration
- No more "," or "Business name" in the company field
- Real-time validation - Instant VAT number verification as customers type
- 27 EU countries supported - Complete coverage including Austria, Belgium, etc...
- Checkout integration - Clean, native Shopify UI that match your store
- Automatic order data - Validated VAT information is automatically saved to order
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 |  CUIC |  SD |
|---|---|---|
| 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 | CUIC | SD |
|---|---|---|
| App Store rating | Not published | 1.0 ★ |
| App Store reviews | Not published | 2 |
| New reviews, 28 days | Not enough data | Not enough data |
| Reviewers a year or more in | Not enough data | Not enough data |
FAQ
CUIC and SD: common questions
- 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 Apr 18, 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 Apr 18, 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.