Vertex

Vertex is an indirect tax technology company that has specialized in indirect tax and compliance since 1978. Its software calculates sales, use and value added tax in real time, manages exemption certificates, meets e-invoicing mandates, and produces reporting and returns, ending in audit defense under what the company calls its Decision-to-Defense approach.

The core engine, Vertex O Series, performs indirect tax determination in 195+ countries and territories and 20,000+ jurisdictions. It can be deployed on premise, in the cloud or as a hybrid, including edge deployment that calculates tax at the point of transaction. Add-ons cover premium content, address cleansing, latitude and longitude conversion and VAT ID validation. Certificate Center handles exemption certificates in real time, and separate modules cover payroll tax calculation and e-commerce and marketplace transactions.

Industry-specific content is published for leasing, hospitality and lodging, communications, retail and oil and gas. The platform is built to connect ERP and source systems into a single governed data set so reporting and filing are audit-ready across jurisdictions.

The company reports more than 60% of the Fortune 500 among its customers, over 1,600 employees across four continents, and 1B+ tax rates and rules in its content. Licensing is enterprise scale and quoted; scope the ERP integration and the content modules actually needed before comparing costs.