Here's a look at the top 10 fastest-growing drone companies building drones and drone-based services:

1) Skydio 2) Saildrone Inc 3) 3D Robotics 4) DroneDeploy 5) Dedrone 6) Zeitview (formerly DroneBase) 7) BRINC 8) Skycatch 9) Sentera 10) Exyn Technologies

Based on total funds raised. Companies >50 employees Source: Crustdata