Vertex's pricing is best suited for large enterprises with complex, multi-jurisdictional indirect tax requirements. The overwhelming majority of G2 reviewers are from enterprise organizations exceeding 1,000 employees, spanning manufacturing, retail, financial services, food and beverages, and medical devices. These buyers leverage Vertex for automated US and global tax calculation, ERP integration with SAP, and multi-country VAT compliance across 40-plus countries. Mid-market companies in accounting, consumer goods, and oil and energy also find value, particularly for returns automation. G2 reviews of Vertex consistently show small businesses and startups struggling with the cost structure, as bundled pricing and per-module fees make Vertex difficult to justify at lower transaction volumes.