Vertex vs. Zamp

Vertex is the Decision-to-Defense global indirect tax and compliance company. We help enterprises control indirect tax and compliance with confidence. From tax determination and e-invoicing to reporting, filing and audit defense, we make outcomes easier to prove and improve over time. Our ability to integrate across ERP, e-commerce, marketplace, procurement, CRM, and other financial systems means customers can centralize tax determination and compliance to improve accuracy and consistency for the business.

Zamp is a fully managed sales tax compliance platform designed for modern digital businesses. After regulatory changes pushed enterprise-level complexity onto growing companies, Zamp was built to eliminate the burden entirely. Combining intelligent automation with a dedicated team of tax specialists, Zamp manages calculations, nexus tracking, registrations, filings, and state notices from start to finish. Unlike DIY tax software, Zamp owns both the work and the outcome, providing accuracy, predictable pricing, and ongoing support.