Vertex, Inc.

Vertex makes software that helps large companies figure out and pay the taxes they owe on sales and transactions. Businesses use Vertex to calculate the right tax amounts, file tax returns, and keep track of tax documents across different states and countries. The company sells this software as subscriptions and also offers services to help companies set it up and run it day-to-day. Vertex has been around since 1978 and works with all kinds of businesses, from retailers to manufacturers.