No worries! From what I can find Dedrone, Aaronia and there is a...

No worries! From what I can find Dedrone, Aaronia and there is a company from The UK that are closest rivals. In terms of the large defence contractors, I don't believe they currently have a product offering on the market. I think this is because this is a new market segment with very specialist requirements. Tracking objects flying at low altitudes can't rely on radar alone.
The rival from the UK (can't remember their name unfortunately) recently won contracts with HM prisons to provide a barrier that stops drones flying within a specific radius of prisons. This is just a blocker, and doesn't have any of droneshields detection or countermeasures.
If you have a look at the competition I think they are years behind Droneshield, especially with the new multi sensory products they have.
Like most tech startups I've followed on the ASX, I think these guys have a great product that is currently a market leader, the problem is going to be cash burn. Back when they had cash rolling in from the option excercises I though I was on to a winner, may still be. It's just the cashflow problem has become a potential problem again.