Markforged offers a platform for 3D printing, as well as a range of 3D printers for industrial uses. While many companies work solely in plastic, Markforged printers can print carbon fiber, stainless steel, fiberglass, and titanium, as well as plastics and other materials. Founder and CEO Greg Mark told us the story of how Markforged went from being an idea to a major disruptive force in this highly competitive industry.