Crossborderit IOSS and DDP vs Tax Rex ‑ Sales Tax Automationfor Shopify (2026)
Crossborderit IOSS and DDP and Tax Rex ‑ Sales Tax Automation are both Shopify apps addressing the complexities of tax compliance, but they cater to very different geographical markets and tax systems. Crossborderit IOSS and DDP focuses on automating compliance with the European Union's IOSS (Import One-Stop Shop) scheme and DDP (Delivered Duty Paid) shipping, enabling merchants to compliantly ship low-value goods to Europe by handling VAT calculations, reporting, and payment. Its core strength lies in its automation and flat-fee structure for IOSS compliance. Tax Rex, on the other hand, is designed for US-based businesses and focuses on simplifying US state sales tax management. It automates report generation, filing, and provides alerts for economic nexus thresholds, streamlining US sales tax compliance. The primary difference between the two lies in their geographical focus: one covers European VAT compliance, while the other addresses US state sales tax. The apps also differ dramatically in user reviews and ratings. Tax Rex boasts a perfect 5/5 rating from 91 reviews, suggesting high user satisfaction, while Crossborderit IOSS and DDP has a significantly lower rating of 1.3/5 from 18 reviews, indicating potential issues with the app's functionality or user experience. Another crucial difference is that Tax Rex helps merchants file returns based on the taxes *already* collected in Shopify, while Crossborderit implies it handles the tax collection itself.
At a Glance
Crossborderit IOSS and DDP
18 reviews
Tax Rex ‑ Sales Tax Automation
91 reviews
Detailed Overview
Crossborderit IOSS and DDP
Automates IOSS "European One Stop Shop" Allows shipping of Low-value goods to Europe, Compliantly
Key Features
- Automated Sync of Sales, Reporting and compliance.
- Full Visibility and reporting for all shipments
- Flat fee that can be seen in check-out and passed on to your customers
Tax Rex ‑ Sales Tax Automation
US State Sales Tax return Reports & Automated Filing for your store. Easy, Accurate & Time Saving!!!
Key Features
- Timely Autofile: Ensure on-time tax return filings while you focus on business
- Accurate Tax Reports: Precise sales tax reports tailored to state's requirements
- Economic Nexus Alerts: Stay informed on new state nexus thresholds
- Effortless State Registration: Simplified new state registration for compliance
- Ability to Ignore orders imported from Marketplaces like Amazon, Ebay, etc
Feature Comparison
| Rating | 1.3/5 | 5/5 |
Rating Crossborderit IOSS and DDP1.3/5 Tax Rex ‑ Sales Tax Automation5/5 | ||
| Reviews | 18 | 91 |
Reviews Crossborderit IOSS and DDP18 Tax Rex ‑ Sales Tax Automation91 | ||
| Geographical Focus | European Union (IOSS) | United States (Sales Tax) |
Geographical Focus Crossborderit IOSS and DDPEuropean Union (IOSS) Tax Rex ‑ Sales Tax AutomationUnited States (Sales Tax) | ||
| Tax System Focus | VAT (Value Added Tax) | US State Sales Tax |
Tax System Focus Crossborderit IOSS and DDPVAT (Value Added Tax) Tax Rex ‑ Sales Tax AutomationUS State Sales Tax | ||
| Key Feature | Automated IOSS compliance and VAT payment | Automated sales tax reporting and filing for US states |
Key Feature Crossborderit IOSS and DDPAutomated IOSS compliance and VAT payment Tax Rex ‑ Sales Tax AutomationAutomated sales tax reporting and filing for US states | ||
| Target Merchant | Businesses shipping low-value goods to the EU | Businesses selling within the US with US sales tax obligations |
Target Merchant Crossborderit IOSS and DDPBusinesses shipping low-value goods to the EU Tax Rex ‑ Sales Tax AutomationBusinesses selling within the US with US sales tax obligations | ||
| Tax Collection | Implied Tax Collection & Payment | Reports & Files Based on Taxes Already Collected |
Tax Collection Crossborderit IOSS and DDPImplied Tax Collection & Payment Tax Rex ‑ Sales Tax AutomationReports & Files Based on Taxes Already Collected | ||
| Ease of Use (Implied) | Potentially complex due to low rating | Likely user-friendly due to high rating |
Ease of Use (Implied) Crossborderit IOSS and DDPPotentially complex due to low rating Tax Rex ‑ Sales Tax AutomationLikely user-friendly due to high rating | ||
| Value Proposition | Simplifies EU IOSS compliance with a flat fee | Automates US sales tax reporting and filing to save time |
Value Proposition Crossborderit IOSS and DDPSimplifies EU IOSS compliance with a flat fee Tax Rex ‑ Sales Tax AutomationAutomates US sales tax reporting and filing to save time | ||
- Conversion Audit
- Speed Audit
- SEO Audit
Conversion Audit
Our Verdict
Choosing between Crossborderit IOSS and DDP and Tax Rex ‑ Sales Tax Automation depends entirely on the merchant's specific needs. If you're a business shipping low-value goods to the European Union and need a solution to handle IOSS compliance and VAT payments, Crossborderit IOSS and DDP is designed for you, *however* the very low rating should be taken with extreme caution. The reviews need to be carefully considered before implementation. If, on the other hand, you're a US-based business struggling with US state sales tax reporting and filing, Tax Rex is the clear choice, given its high rating and focus on US-specific compliance. The high rating and positive reviews suggest a better user experience and more reliable performance.
Because of the stark difference in customer satisfaction, it is difficult to recommend Crossborderit IOSS and DDP without significant reservations. A merchant should thoroughly investigate the negative reviews and explore alternative IOSS solutions before committing to Crossborderit. For US sales tax automation, Tax Rex seems to be a significantly more reliable and highly rated solution.
Common Questions
Which app is better for a business selling goods in both the US and the EU?
Neither app alone is sufficient. Tax Rex handles US sales tax, and Crossborderit IOSS and DDP handles EU IOSS. A merchant would need both or a comprehensive solution that covers both regions if such a solution exists.
Does Crossborderit IOSS and DDP handle sales tax collection for US states?
No, Crossborderit IOSS and DDP focuses solely on the EU's IOSS scheme, which deals with VAT. It does not address US sales tax.
Is Tax Rex suitable for businesses operating outside the US?
No, Tax Rex is specifically designed to handle US state sales tax. It is not applicable to businesses operating solely outside the US or dealing with other tax systems like VAT.
What should I do if I'm concerned about the low rating of Crossborderit IOSS and DDP?
Carefully read the reviews to understand the specific issues users have encountered. Consider exploring alternative IOSS solutions and contacting the app developer to address your concerns before committing to the app.
Can I use Tax Rex to automatically collect sales tax in Shopify?
No, Tax Rex uses the sales tax information that Shopify has *already* collected. It provides reporting and filing features, but it doesn't handle the initial tax collection process within Shopify.
Get More From Your Shopify Store
Run audits for SEO, CRO, PageSpeed, and AI visibility. Get a clear report and actionable fixes.
Try Fix My Store