Xconomy | Dassault to Pay $400M for Exa in Engineering Software Consolidation Xconomy Exa is part of a strong cluster of engineering and design software companies that have emerged in the Boston area over the years, including PTC (NASDAQ: PTC), GrabCAD (acquired by Stratasys in 2014), Onshape, Aras, SolidWorks (acquired by Dassault ... |