AkuCalc vs Vatstack

AkuCalc is an API product for calculating sales tax inside ERP, ecommerce, and billing workflows. It covers all US tax jurisdictions, including more than 13,000 jurisdictions, and supports Canada. Calculations use transaction addresses for rooftop-accurate results, while rates and rules update automatically as regulations change. Businesses can configure taxability by product, jurisdiction, and transaction type; complex or research-intensive mappings are scoped separately. A valid certificate stored in AkuCert is applied automatically as an exemption. The API connects custom ERP, ecommerce, billing, and other business systems, and featured integrations include Microsoft Dynamics 365, Business Central, Dynamics GP, Acumatica, Sage Intacct, QuickBooks, and NetSuite. Transaction data supports reporting, reconciliation, return preparation, and audit workflows. Clarus describes guided implementation covering configuration, integration setup, testing, and training, with timing depending on systems and data complexity. AkuCalc is aimed at finance, tax, controller, ERP, and growing-business teams. Pricing is on request through a custom quote.

Vatstack is a VAT API for businesses selling telecommunications, broadcasting and electronic services to customers around the world. It provides rates for domestic and cross-border sales, updating them when government changes take effect. The API can calculate VAT-inclusive or VAT-exclusive prices, determine customer location from an IP address or billing address, verify VAT numbers for exemption, and adjust rates for some digital products such as ebooks. Real-time VAT and GST checks cover the 27 EU member states, Australia, Norway, Singapore, Switzerland and the United Kingdom. EU and UK checks include a consultation number, and validation records are stored in the cloud and replicated between EU data centers on AWS. Users can import a CSV for bulk checks. Vatstack compiles VAT OSS and EC Sales List reports using European Central Bank exchange rates, and integrates with Stripe to sync invoices, location evidence and tax IDs and to adjust reports after refunds. A free plan is available; paid plans start at $15/mo.