FlytNow is described as 'Live stream HD videos from drones in real-time; control drones & their payloads remotely, over 4G/5G at ultra low latency. Ideal for commercial drone operators, system integrators and enterprises'. There are four alternatives to FlytNow for Online / Web-based, Self-Hosted solutions, iPad and iPhone. The best alternative is FlytBase. It's not free, so if you're looking for a free alternative, you could try AirCorp Photogrammetry. Other great apps like FlytNow are DroneDeploy (Paid) and Flyt.Live (Paid).
FlytBase platform allows easy deployment of intelligent drones, connected with cloud-based business applications. FlytBase provides drone software which is compatible with all major drones (DJI, 3DR, APM, PX4) and hardware platforms.
AirCorp Photogrammetry is an hosting service, provided by iBrain Developers, for Drone data, in formats including JPEG/PNG (Photogrammetry), 3D Object (Mesh) data & Point-Cloud-Data in LAS/LAZ formats. It provides both free & subscription plans.