Vertex for e-Commerce vs Zamp

Vertex for e-Commerce automates indirect tax determination and compliance during e-commerce checkout through APIs and a web dashboard. It identifies customer location, applies taxability logic, and calculates tax from rules and rates configured in Vertex O Series Cloud; that configuration determines which countries and regions are available. The service handles direct and marketplace transactions, can identify the party responsible for remitting tax, and supports sales and use tax, GST, HST, PST, QST, VAT, IOSS, and OSS. Businesses can use tax-inclusive or tax-exclusive prices, currency conversion, refunds, and discounts. The product includes the Seller Transaction API, digital invoices through Vertex Invoice IQ, tax ID checks through Vertex Validator, and a dashboard for settings, reports, and users. A pre-built checkout form supports Stripe and PayPal, one-time and recurring sales, and launch by link or JavaScript. Vertex describes it as suited to digital-goods sellers, particularly businesses with small tax teams. It supports only digital goods and does not support Brazil. Pricing is on request.

Zamp has no write-up on Specifiction yet; its figures are above.