https://techcrunch.com/2018/10/29/fresh-drones-of-delair/

Airware desperately sought cash for 18 months before running out of money and shutting down last month, leaving about 120 employees without jobs after the startup had burned $118 million in funding. Bandaid strategic investments from construction company Caterpillar and others kept Airware alive as it looked for a $15 million round, according to a former employee.

A late pivot from hardware to drone software sales through Caterpillar’s dealers went sour, as Airware lacked the features found in competitors and suffered from slow engineering cycles. “So Caterpillar told them, ‘We’re not going to fund you any more. We’re pulling our money.’ So Airware didn’t make payroll,” the source says. The sudden shutdown of one of the most-funded drone startups sent a shock wave through the industry.