Rob van Es

Pure software is a leading software tool maker. It was acquired in 1996 which was acquiredby rational software and then was acquired by IBM in 2002

Part of International Business Machines Corp., Rational, Inc. provides object oriented software tools. The company is based in Santa Clara, CA. Rational was acquired by Verdix Corp. on April 18, 1994.

Fortify Software, Inc. provides software security solutions. The company was founded by Arthur Do in 2003 and is headquartered in San Mateo, CA.

Aria Systems, Inc. provides enterprise cloud-based subscription billing solutions. It provides subscription businesses/divisions with an integrated platform for billing management, revenue recognition and associated business intelligence. The firm offers invoicing engine that supports a range of billing scenarios on the market and includes various components, including calculation, usage rating, taxation, invoice presentation, account management solutions, marketing tools, reporting and analytics to improve billing and customer management processes, manages and automates subscription management and billing solutions. The company was founded by Edward J. Sullivan and Brendan O'Brien in 2002 and is headquartered in San Francisco, CA.