https://www.airdog.com/meet-airdog/
https://hexoplus.com/
http://www.ascentaerosystems.com/sprite
https://www.lily.camera/
Super excited to see multiple options developing in this space.
Lily has gotten a lot of publicity, but isn't a hands down winner IMO.
I'd prefer one that can use the GoPro I already have. But then I'd expect it to cost ~$500 less than a unit that includes a comparable camera.
Also, at only ~20 min flight time, exchangeable batteries will be a must, methinks.
Not to mention that Lily is rated for 25 mph, which is awfully close to wakeboarding speeds. What happens when there's a 5-10 mph head wind?