OpenFiskal TSE & RKSV for POS vs Tax Rex ‑ Sales Tax Automationfor Shopify (2026)

OpenFiskal TSE & RKSV for POS and Tax Rex - Sales Tax Automation cater to distinct segments of the Shopify merchant ecosystem. OpenFiskal targets merchants operating Point of Sale (POS) systems in Germany, Austria, and Switzerland (DACH region), addressing the specific fiscal regulations (KassenSichV and RKSV) in these countries. Its strength lies in providing a compliant POS system with real-time secure signing of receipts, automatic Z-reports, and cashbook functionalities tailored to DACH region's legal requirements. Tax Rex, on the other hand, focuses on US-based e-commerce businesses grappling with the complexities of US state sales tax. It automates sales tax reporting and filing, provides economic nexus alerts to track when a merchant needs to register in a new state, and simplifies the state registration process. While both apps share the "Finances, Taxes" category in Shopify, their functional focus and geographic scope are vastly different. The 'ease of use' for OpenFiskal might involve setting up compatible POS printers, while for Tax Rex, it's about connecting to state portals. The value proposition of OpenFiskal is compliance with local regulations, while Tax Rex offers time savings and reduced risk of errors in US sales tax management.

OpenFiskal TSE & RKSV for POS and Tax Rex - Sales Tax Automation cater to distinct segments of the Shopify merchant ecosystem. OpenFiskal targets merchants operating Point of Sale (POS) systems in Germany, Austria, and Switzerland (DACH region), addressing the specific fiscal regulations (KassenSichV and RKSV) in these countries. Its strength lies in providing a compliant POS system with real-time secure signing of receipts, automatic Z-reports, and cashbook functionalities tailored to DACH region's legal requirements. Tax Rex, on the other hand, focuses on US-based e-commerce businesses grappling with the complexities of US state sales tax. It automates sales tax reporting and filing, provides economic nexus alerts to track when a merchant needs to register in a new state, and simplifies the state registration process. While both apps share the "Finances, Taxes" category in Shopify, their functional focus and geographic scope are vastly different. The 'ease of use' for OpenFiskal might involve setting up compatible POS printers, while for Tax Rex, it's about connecting to state portals. The value proposition of OpenFiskal is compliance with local regulations, while Tax Rex offers time savings and reduced risk of errors in US sales tax management.