Defence-as-a-Service: Europe’s New Military Procurement Model

Defence-as-a-Service is moving from a technology-sector analogy to a practical defence procurement model, as armed forces seek faster ways to field drones, sensors, counter-UAS systems and software-defined military capabilities.

The model, often shortened to DaaS, applies a service-based structure to military capability. Instead of buying every platform, system or software stack outright, governments can pay private firms to provide a defined operational capability, maintain it, update it and adapt it as threats change.

The concept received new attention after Reuters Breakingviews highlighted Ukraine’s use of private-sector air-defence groups and compared the model with service-based technology procurement. The issue is not only commercial. It raises strategic questions about speed, control, dependency and accountability in modern warfare.

Defence-as-a-Service and the Ukraine Test Case

Ukraine provides the clearest current example of Defence-as-a-Service in practice. Its Ministry of Defence has integrated private companies into a controlled air-defence pilot project. These companies do not operate outside the military system. Instead, they function as part of Ukraine’s broader layered air-defence architecture.

The Ukrainian model shows why DaaS has become relevant. Drone warfare changes quickly. New Shahed variants, reconnaissance UAVs, electronic warfare methods and countermeasures appear in short cycles. Therefore, a capability model based on continuous updates can be more useful than a slow acquisition model built around long platform lifecycles.

For European defence planners, the lesson is direct. The threat environment now rewards forces that can adapt sensors, software, effectors and command systems rapidly. As a result, procurement is shifting from ownership alone toward access, updates and operational resilience.

Why Defence-as-a-Service Fits Software-Defined Warfare

Traditional defence procurement works well for major platforms such as aircraft, warships, armoured vehicles and missile systems. However, it struggles when capability depends on software, data, autonomy, sensors and rapid hardware refresh cycles.

Defence-as-a-Service offers a different approach. A contractor can provide the capability, keep the system current and introduce improvements during the service period. This structure can support counter-drone systems, intelligence, surveillance and reconnaissance, electronic warfare and autonomous mission software.

Moreover, DaaS can help smaller technology firms enter defence markets. Instead of forcing governments to make large upfront purchases, service-style contracts can support faster testing, deployment and scaling. This matters for Europe, where rearmament requires both industrial capacity and faster capability insertion.

Counter-UAS, ISR and Undersea Surveillance

The Defence-as-a-Service model already appears in several capability areas. Counter-UAS is one of the strongest candidates because drone threats evolve quickly and require constant software, sensor and effector updates.

ISR is another natural fit. Aircraft, sensors, data links and mission software can be provided as a service when the customer needs intelligence outputs rather than permanent ownership of every platform. Similarly, undersea surveillance and anti-submarine monitoring can use contractor-owned and contractor-operated systems under military direction.

Defence-as-a-Service for ISR counter-UAS and software-defined defence systems — Service-based defence contracts may expand in ISR, counter-UAS, autonomy and undersea surveillance.

These use cases show why Defence-as-a-Service is not simply “outsourcing.” It is a model for keeping high-change military capability current. However, it still requires clear command authority, security controls and sovereign decision-making.

The Sovereignty Risk

The same features that make Defence-as-a-Service attractive also create risk. If a military relies on a rented or externally operated capability, it must know what happens during crisis, escalation or supplier failure.

Governments need answers to several questions. Can the service be withdrawn? Can prices rise during wartime? Who controls software updates? Who owns mission data? Can the contractor refuse support for a politically sensitive operation? These issues become more serious when the capability supports lethal force.

Therefore, DaaS contracts need stronger guardrails than normal technology-service agreements. They should define continuity of service, wartime obligations, data rights, cybersecurity standards, human control requirements and government step-in rights.

Implications for European Defence Industry

For Europe, Defence-as-a-Service may become part of the answer to two linked problems. First, armed forces need more capability at speed. Second, defence ministries need to connect faster with software, AI, autonomy and drone firms.

Service-based contracts can support this shift. They can create recurring revenue for defence technology companies and reduce the time between prototype and operational use. In addition, they can help armed forces avoid being locked into obsolete systems.

However, the model will not replace traditional procurement. Europe will still need sovereign production of ammunition, missiles, armoured vehicles, aircraft, naval systems and air-defence interceptors. Defence-as-a-Service is more likely to complement these assets by adding software-defined, updateable and mission-specific capability layers.

For further Defence Agenda coverage, read our defence technology, unmanned systems and Europe sections. Recent examples of this industrial shift include Shield AI’s Hivemind partnership with UAV Navigation–Grupo Oesía and FNSS and CSG Defence’s Danube Defence Systems joint venture.

Defence-as-a-Service Needs Rules Before Scale

Defence-as-a-Service will likely grow because the operational logic is strong. Drones, autonomy, ISR and software-defined systems need constant adaptation. Service-based models can deliver that adaptation faster than classic procurement.

Yet the model should scale carefully. States cannot outsource sovereign responsibility for war. They can use private-sector speed, engineering and operational support, but they must preserve command authority, legal accountability and control over lethal decisions.

The next phase of Defence-as-a-Service will depend on whether governments can build contracts that combine speed with sovereignty. If they succeed, DaaS could become a core element of European rearmament and software-defined defence.