Aspen Technology, Inc., together with its subsidiaries, develops and supplies integrated software and services that enable the process industries to design, operate, manage, and optimize their business processes. Its software applications utilize proprietary empirical models of chemical manufacturing processes to enhance plant and process design, economic evaluation, production, production planning and scheduling, supply chain optimization, and operational performance.

The company's aspenONE product provides engineering, plant operations, and supply chain management software applications. Its engineering products include Aspen Plus, Aspen HYSYS, Aspen Capital Cost Estimator, HTFS, and Aspen Basic Engineering that help in designing and improving plants and processes, as well as to model and improve the way to develop and deploy manufacturing assets. The company's plant operation products comprise Aspen InfoPlus.21 for production management and execution; and Aspen DMCplus for process control. Its supply chain management products include Aspen Inventory Management & Operations Scheduling, Aspen Petroleum Supply Chain Planner, and Aspen Retail for supply and distribution; and Aspen PIMS, Aspen Petroleum Scheduler, Aspen Olefins Scheduler, Aspen Plant Scheduler, Aspen Supply Planner, and Aspen Collaborative Demand Manager for planning and scheduling. The company also provides maintenance and training services for customer technical support and access to software fixes and upgrades; and professional services. It serves various process industries, such as oil and gas, petroleum, chemicals, pharmaceutical, and other industries that manufacture and produce products from a chemical process.