Ansys makes engineering simulation software used by engineers to create virtual models of physical products and test how those products behave before building physical prototypes. By simulating phenomena virtually, customers can catch design flaws early, reduce prototyping costs, and accelerate time to market. Ansys covers a broad range of physics — structural mechanics, fluid dynamics, electromagnetics, semiconductors, and optics — and serves industries including aerospace and defense, automotive, high-tech electronics, healthcare, and industrial equipment. Ansys sells primarily through a direct sales force (~75% of revenue), with the remainder through channel partners. The core business model is software licensing, dominated by subscription leases that bundle software, maintenance, support, and upgrades into fixed-term contracts, generating highly recurring revenue. Customers can also purchase perpetual licenses or flexible named-user and elastic unit subscriptions. Revenue growth is driven by expanding the user base, cross-selling across Ansys' physics portfolio, and growth in compute consumption as simulations grow larger and more complex. R&D runs at roughly 20-22% of revenue annually, reflecting the depth of solver development required to maintain accuracy and customer trust. Ansys also offers cloud delivery via AWS and Azure, and is investing in AI-augmented simulation through its SimAI platform, which uses prior simulation data to predict design performance far faster than traditional simulation. Ansys agreed in January 2024 to be acquired by Synopsys in a cash-and-stock deal, with closing expected in the first half of 2025.