Interceptor drones: how drones against drones are becoming a new class of air defence
Expensive guided missiles against cheap attack drones do not add up. That is why defence companies and start-ups worldwide are developing interceptor drones – from the Ukrainian hackathons to the Sting from Wild Hornets.
The most effective answer to drones is interceptor drones – defence companies and start-ups worldwide are currently working on this idea. Their systems are intended to neutralise incoming unmanned aerial vehicles efficiently, flexibly and above all at low cost. An overview of the new class of so-called “interceptor drones”.
That incoming drones such as Geran and Shahed pose a threat far beyond the front line became apparent in Kyiv shortly after the start of Russia’s war of aggression against Ukraine. Increasingly, the attackers targeted not only soldiers and military equipment, but also civilian targets and critical infrastructure deep in the hinterland.
The core of the problem also quickly became clear: Russia was able to produce and deploy attack drones in sheer numbers that overwhelmed even modern air defence systems. Engaging cheap kamikaze drones with expensive guided missiles was inefficient both militarily and economically. This gave Ukraine a new task – developing low-cost, scalable defence solutions against an air threat that had never existed in this form before.
It started with a hackathon
As is typical for Ukraine, a solution was not long in coming: in June 2023, the Ukrainian Ministry of Digital Transformation held a national hackathon. Engineers, start-ups and military experts jointly developed initial concepts and prototypes there. They form the basis of an entirely new segment of air defence today – mobile, autonomous interceptor drones that locate, track and selectively eliminate enemy systems, without expensive guided missiles and with much greater flexibility.
Proposals were submitted by 50 to 60 teams. Three of them emerged as winners; each received a contract worth one million dollars (around 860,000 euros) to develop its project further and scale up production.
Further impetus came in April 2024 from the Drone XL Defence Tech Hackathon in London. The Paraceptor drone was presented there: a high-speed quadcopter with an aerodynamic conical fuselage, based on first-person view (FPV) technologies, whose intercept course is calculated precisely using position data.
Besides quadcopters, fixed-wing and jet drones are also currently being planned, developed and manufactured. Their role lies between the classic anti-aircraft gun and the various classes of short- and medium-range air defence missiles.
Sting from Wild Hornets
Ukrainian MilTech company Wild Hornets, which develops and produces combat drones, has existed since spring 2023. It is known above all for images and videos on its social media channels. These are more than self-promotion, however: behind them is a fundraising initiative calling on individuals, organisations and companies to actively support development and production.
Insights into Wild Hornets’ latest development came in October 2024 from an article in the British newspaper The Telegraph, which also showed a photo of the Sting interceptor drone prototype. Once the project was known, videos of test flights appeared towards the end of 2024; series production began in early 2025. As of mid-October 2025, Wild Hornets says it has destroyed 900 targets with the interceptor drone, with 70 per cent of Sting missions ending in a successful intercept.
Many projects, common problems
Sting is no longer a one-off project. Several comparable projects are under way in Ukraine, Russia also has corresponding developments, and well-known start-up projects are being added in the West.
What they all have in common is that they must solve a number of technical and operational challenges:
High top speed so that flying targets can be caught – for electric drones, over 300 km/h is now considered normal.
Good climb performance: newer developments use small booster rockets that quickly take interceptor drones to an altitude of 4 to 5 kilometres.
Partial or complete replacement of the pilot by automatic control. Ukraine, and later Russia too, have invested massively in FPV pilots, but in the long term interceptor drones are to manage without human control.
Scalability and modifiability: compared with conventional air defence missiles, production numbers must rise by several orders of magnitude – a few thousand systems per day would be needed instead of a few thousand per year. At the same time, adaptation to new threats must be ensured so that technical and tactical changes by the enemy can be answered quickly with modifications to the interceptor drones.
Integration into and interaction with existing air defence systems: in the long run, the multitude of very different air threats can only be handled by coordinated defence – that is, when the cheapest available yet sufficiently effective means can be deployed in parallel in sufficient numbers.
Hit-to-kill or warhead with proximity fuze: when potentially tens of thousands of drones fly over the hinterland every day, every drone destroyed by impact energy alone rather than by an explosive charge with fragmentation effect means one less problem in future. Whatever explodes eventually falls back down – and demining services also have only limited capacity.
Price as the central driver: it is the real reason for the demand. Air defence missiles often cost six- to seven-figure sums each, whereas interceptor drones should ideally cost between 1,000 and 5,000 euros. For the cheapest models, the current “sound barrier” is around 10,000 euros per unit. Anything that costs more – in some cases considerably more – must deliver correspondingly more.
In price, the following two systems sit between the low-cost interceptor drones and the expensive air defence missiles.
Both fly at subsonic speed and are therefore slower than missiles, but remain in action much longer – flight time is estimated at around 30 to 60 minutes. Their operating radius is also clearly greater than that of short-range air defence missiles. If a mission is aborted, they can land and be reused; this improves cost-effectiveness and tactical flexibility.
