AccurateTax vs ShipVAT

AccurateTax provides TaxTools, a cloud service for e-commerce sales-tax compliance. It calculates sales tax in real time from customer addresses, product taxability and applicable rules, while refining addresses to a US Postal Service-approved format. Reports let sellers file independently, or they can select services covering registration, filing and payment. Optional exemption-certificate management handles documents for exempt transactions. Integrations include Ability Commerce, Adobe Commerce, Magento Open Source, Miva Merchant, osCommerce, Shopify, ShopSite, Stone Edge Order Manager and WooCommerce. An XML API supports custom carts and other applications. AccurateTax identifies itself as a Streamlined Sales Tax Certified Service Provider and says free service is available under the SST contract where applicable. Pricing depends on processed orders and optional services, with charges per order rather than per API call. Basic Service lists 99.99% uptime.

ShipVAT provides an API for calculating VAT, sales tax, and GST across 93 jurisdictions. The maker lists the EU, UK, US, Canada, and Australia among supported regions, and describes economic nexus threshold intelligence for all 50 US states and beyond. API functions include tax calculations, rate and threshold lookup, transaction and customer management, VAT validation, compliance reports, webhooks, and address validation. ShipVAT says rates include a source URL, verification timestamp, and effective dates, with tax data curated from official sources. Developers can use a TypeScript SDK, OpenAPI 3.0, Swagger UI, and curl examples. Endpoints use Bearer-token authentication with test and live key formats. The API is described as working with Paddle, LemonSqueezy, PayPal, or any payment stack. The Free plan costs nothing and allows 100 API calls per month. Pro costs $49 a month for 50,000 calls; Enterprise pricing is custom and its listed call limit is unlimited.