Defence companies in United Kingdom

Applies decision intelligence to government, defence and critical infrastructure, combining simulation, digital twins and AI agents in a platform called Faculty Frontier.

Faculty Frontier

A decision intelligence platform built on the OUDA framework (Observe, Understand, Decide, Act). It connects organisational data and AI models, simulates the impact of decision strategies on KPIs via a Computational Twin and Simulation Engine, identifies optimal approaches using the AI Decision Agent (ADA), and deploys them into operational workflows. Used across defence, life sciences, energy and financial services.

Runs a distributed network of precision factories powered by MasonOS, its proprietary software platform, manufacturing high-precision components for aerospace, defence and critical industries.

Synthetic environments and military simulation platform used for NATO defence training and wargaming. Raised over $700M in total funding.

Develops ultra-low Earth orbit satellites and ion propulsion systems to bring higher-resolution imaging, direct-to-device connectivity and weather intelligence closer to Earth.

Builds counter-drone net capture systems and autonomous electro-optical targeting platforms for military and government security operations.

Designs memory-safe semiconductors with post-quantum cryptography for securing servers, edge devices and critical infrastructure against both current and quantum-era threats.

Builds edge AI camera systems and GPS-denied autonomy software for small drones, enabling security teams and military units to operate in environments where cloud connectivity and external infrastructure cannot be relied on.

Builds physics simulation platforms that use machine learning to accelerate engineering design for aerospace and defence applications.

Builds autonomous systems software that links disparate unmanned hardware through a single command interface for defence operations.

Builds quantum networking hardware that connects quantum processors into distributed computing architectures, enabling commercial-scale quantum computing.

Quantum Networking Unit (QNU)

A 19-inch rack-mount system hosting photonic integrated circuits that distributes quantum entanglement across connected processors. Launched in June 2025, the QNU provides reconfigurable connectivity between quantum computing nodes for datacenter-scale quantum architectures. Nu Quantum describes it as the world's first product of its kind, delivering 99.7% entanglement fidelity at a 1 MHz attempt rate.

Entanglement Fabric

Nu Quantum's distributed quantum computing architecture, combining its networking hardware with a software abstraction layer for qubit-agnostic application development. The Entanglement Fabric defines how modular quantum processors interconnect and scale, and is the overall framework that the QPI and QNU are designed to populate.

Builds miniaturised cold atom quantum hardware for GPS-independent navigation, timing and sensing in defence, telecoms and critical infrastructure.

Develops quiet, safe electric propulsion systems and jet engines for aircraft including drones, air taxis, and regional aircraft to accelerate sustainable aviation.

Aspen 212

A 212mm ducted fan propulsion unit producing 5 kg static thrust at 500g weight, achieving 93% noise reduction and 45% greater efficiency than an open propeller of the same diameter.

Sycamore 160

A compact 160mm ducted fan engine for fixed-wing sub-25kg UAVs producing 6 kg thrust at 792g, designed for 26 m/s cruise speed with 75% noise reduction.

Hemlock

Ultra-high-speed ducted fan engine designed for fast fixed-wing drone applications, capable of flight speeds up to 125 m/s while maintaining low acoustic signature.

SimOps platform spun out of Imperial College London and the Alan Turing Institute that operationalises simulation-backed AI for mission-critical engineering, serving BAE Systems, QinetiQ and Boeing via Digital Catapult's Defence Testbed Accelerator.

Builds modelling and simulation software for strategic decision-making, creating synthetic environments and digital twins for defence and national security customers.

Skyral Core

A modular toolkit of simulation and modelling components for building high-fidelity synthetic environments, supporting agent-based modelling of large civilian populations with real-time behaviour tracking. The foundation platform on which Skyral's defence and government applications are built.

ARCUS

An agent-based simulation laboratory for operational planning that provides real-time scenario exploration and Blue-Red adversarial course-of-action testing. Delivered for the UK MoD via the Accelerated Capability Environment, built in consortium with Frazer-Nash Consultancy and Principle One.

Skyral Mirror

Strategic digital twin platform that models human behaviours alongside real-time infrastructure systems including transit, power and telecoms networks for entire cities and countries. Used for vulnerability assessment, infrastructure resilience planning and consequence analysis.

Builds multi-link satellite communication terminals that connect simultaneously to multiple satellite networks and orbits from a single device, for defence and government applications.

Builds synthetic environment software for military training, command and control, and battlefield intelligence for armed forces worldwide.

Builds radio frequency-based drone detection systems and signals intelligence sensors for airports, military, prisons and critical infrastructure operators.

Designs and manufactures edge computing, sensing and communications systems for defence, national security and resilience organisations operating in degraded or denied connectivity environments.

Builds AI software that processes vast amounts of open-source and classified information to deliver intelligence analysis for defence, national security and commercial organisations.

Adaptive human risk management platform that uses behavioral science and data to detect and reduce cybersecurity risks caused by employee behavior.

Integrated risk management and analytics company focused on managing digital vulnerabilities inherent in third-party ecosystems. CyDesk platform uses AI and machine learning to automatically evaluate risks from over 900 data sources for cybersecurity, compliance, and business risk management.

Develops GPS-free inertial navigation and flight termination systems for drones and crewed aircraft, including the SnapShot nano-drone funded by a £226,200 DASA contract. ITAR-free UK sovereign capability accredited to ISO 9001.

Scotland-based developer of autonomous counter-UAS drones, building the Red Kite fixed-wing drone hunter with patented net capture mechanism and the Shadow Hawk aerial defence platform for critical national infrastructure protection.

Automated AI red teaming and security testing. First company to apply dynamic application security testing methodology to AI systems.

Builds Mastermind, an edge-native agentic AI box that turns cheap third-party drones into coordinated autonomous squads operating in denied environments. Raised $2.1M pre-seed in 2026 led by Seraphim Space with backing from the UK National Security Strategic Investment Fund.

Builds brain-inspired autonomous AI software for robots and drones, using Active Inference and the Free Energy Principle to enable adaptive decision-making on edge devices without large training datasets.

Builds quantum-safe encryption software that protects government, defence and telecoms networks from current cyber threats and future quantum computing attacks.

Designs and manufactures electronic-scanning ground-based radar systems for surveillance of moving objects on land, coastlines and in the air. Their solid-state micro Doppler radars provide 24/7 surveillance capabilities for border security and military force protection.

Technology company building Axiom, a secure workforce management platform that helps organizations verify, support, and pay their globally dispersed teams while managing operations at scale.

Develops layered integrated security solutions and counter-drone technologies for critical site protection. Specializes in AI-powered threat detection systems.

FACE

AI-powered command and control platform that fuses data from 70+ sensor types across 45+ vendors into a single interface, processing over 400 concurrent threat decisions in real-time per site.

SKYSIGHT

AI-enabled optical detection system combining fixed wide-angle and PTZ cameras to autonomously detect, track, and classify drones, vehicles, and personnel without continuous operator monitoring.

Counter-Drone Integrated System

Layered security architecture combining RF sensors, 360-degree radar, directional radar, EO/IR cameras, and INSIGHT AI analytics to detect and track unauthorised drones across airports and critical sites.

Earth observation company providing the world's highest resolution commercial thermal imagery from satellites to monitor climate change, energy efficiency, and economic activity with 3.5m resolution thermal data.

UK-based company providing a Generative AI Synthetic Data Cloud platform that creates fully annotated synthetic data and trains computer vision algorithms at scale for various industries.

52 North Health is a University of Cambridge spin-out developing advanced medical devices for nuclear emergency preparedness. Selected for NATO DIANA, their ARC™ product strengthens medical resilience capability, enabling remote triaging and treatment monitoring of those at risk of radiation sickness.

Designs and operates the Pioneer-class small waterplane area twin hull USV for anti-submarine warfare, maritime ISR and critical national infrastructure monitoring, becoming the UK's first Remotely Operated Unmanned Vessel certified under Workboat Code 3 in 2025.

UK leader in AI safety, security, and assurance providing testing, evaluation, and monitoring of AI systems. Works with UK Government's AI Safety Institute and Ministry of Defence to identify AI vulnerabilities and enable safe AI deployment in critical defence environments.

Full-stack photonic quantum computing company developing quantum technologies for defence, aerospace, cybersecurity and communications applications. Provides quantum computing platforms, quantum communication systems, and quantum cryptography solutions.

Developer of modular military aircraft systems featuring common core fuselage with interchangeable components for training and operational roles. Creates advanced jet trainers, basic trainers, and light attack variants with digital engineering and reconfigurable avionics.

London defence startup building Chimaera counter-UCAV autonomous defence system, Arachnet jam-resistant tactical mesh network, and QCER RF energy-harvesting module. Selected for NATO DIANA 2026 cohort in advanced communications.

Specializes in photonic, laser, fiber-optic and electrical/electronic solutions for aerospace, defence and space harsh environments. Provides high-quality engineered photonic solutions including fiber optic cable assemblies, free space optics, and optical components.

Develops OT and industrial control system cybersecurity products including Dot (asset discovery), Care (risk assessment) and Optics (pre-incident threat vector analysis) for critical national infrastructure operators. Spun out of Cardiff University research and selected for the AWS European Defence Accelerator.

Space manufacturing company developing hardware for large-scale crystallization of protein drugs in microgravity. While primarily focused on pharmaceuticals, their space manufacturing capabilities and orbital operations have potential dual-use applications.

Interceptor missile systems including Skyhammer and Starhammer. Advanced missile defence and interception technology.

UK developer of radar signal processing, tracking and display software used by defence and maritime system integrators, supporting a wide range of modern and legacy radars with hardware-agnostic SDKs. Serves naval, air and security customers worldwide.

AI quoting platform for manufacturers, extracting materials and pricing inputs directly from CAD files and drawings. Selected by UK Digital Catapult and National Composites Centre for the Defence Testbed Accelerator to make defence Technical Data Packs securely discoverable across distributed additive manufacturing supply chains.

Covert surveillance optics spun out of Dstl in 2007, manufacturing intrusive surveillance lenses capable of imaging through pinholes as small as 0.3mm, plus long-range pan-tilt-zoom systems for defence and law enforcement.

Dstl spin-out making SonarBell, an omni-directional passive sonar reflector used for asset and location marking, sonar testing and performance checking. Battery-free with no electronics for underwater defence applications.

Cambridge Radio Frequency Systems designs RF sensors and spectrum-monitoring software for defence and national security, built around the RFeye Node sensor that covers up to 40 GHz. Over 4,600 sensors deployed across 319 organisations on six continents.

UK data and AI startup developing MIRA AI for natural language querying across disparate enterprise datasets. Selected for Digital Catapult's Defence Testbed Accelerator with the MoD to build secure Technical Data Pack connectors for defence supply chains.

Delivers safety-related control, instrumentation and mission systems for UK nuclear facilities and defence platforms across naval, air and land domains.

Caithness-based engineering firm designing rugged lithium-ion battery systems for the global defence industry, with 20+ years supplying the military. Key products include the BB2590 smart battery and 6T lithium-ion vehicle battery.

Multi-use technology company developing closed-source intelligence systems and threat detection platforms, focusing on OSINT capabilities and situational awareness solutions.

UK counter-drone company building the Crown, a sub-100-gram 3D-printed FPV drone attachment that physically captures rogue multirotor drones mid-air without jamming or pyrotechnics. Patents pending in the UK, Hong Kong, EU and US.

Commercial geospatial intelligence company that applies AI and machine learning to multi-operator satellite imagery to deliver decision-ready insights to industry and government. Selected for the AWS European Defence Accelerator and based in Guildford, Surrey.

Scottish UAS specialist that designs, manufactures and trains on drone and counter-drone systems, most recently launching the HAMMER fixed-wing attack drone with Aero Solutions for UK and allied forces. Operates a manufacturing and test facility in Haddington, East Lothian.

UK specialist in energetic materials, pyrotechnic mechanisms and blast mitigation. Designs and manufactures cable cutters, actuators, gas generators and rocket motors used in defence applications including ejector seats, parachute deployment and breacher grenades developed with Dstl.

Dstl spin-out building Micro ESM electronic support measures sensors that automatically identify and track radar signals. Miniaturised radar detection small enough to be hand-carried or mounted on light UAVs.

Designs and manufactures rugged uncrewed aerial systems for ISR, with platforms proven on Ukraine's frontline and in service with UK armed forces and emergency responders.

Develops next-generation navigation and positioning software using Supercorrelation technology to enhance GNSS accuracy for smartphones, wearables and autonomous vehicles.

Cybersecurity company that provides physical network disconnection technology through the FireBreak platform, enabling remote control of network connectivity without using the internet for ultimate protection against cyber threats.

Gravity Industries develops human flight technology including jet suits, creating the ultimate freedom of true personal flight experiences.

Specializes in neuromorphic computing and AI to enable fully autonomous drones and robots using optimization-driven AI that mimics human neural networks.

Builds drone-in-a-box systems that let organisations deploy, recover and recharge drones autonomously, with remote mission control from anywhere in the world.

UK's leading compound semiconductor development and fabrication company, manufacturing advanced devices for defence, communications, and energy applications.

GaN RF MMICs

Monolithic microwave integrated circuits for radar and secure communications, enabling low noise amplifiers, high power amplifiers, and medium power amplifiers for defence and satellite systems.

MEMS Sensors and Actuators

Custom MEMS devices including accelerometers and microfabricated vapour cells for atomic clocks and magnetometers, with over 50 different device types manufactured across aerospace, defence, and space exploration.

UK radiation detection and shielding manufacturer, co-developer with AWE of the GMS595 gamma dose-rate monitor — the most sensitive gamma monitor available, cutting CBRN response time from two minutes to two seconds.

Builds chip-based quantum key distribution (QKD) and quantum random number generation (QRNG) hardware for securing defence, telecoms and critical infrastructure against quantum-era threats.

British company developing disruptive maritime capabilities including advanced littoral, surface, and subsurface autonomous platforms for defence and commercial applications using cutting-edge composite materials and rapid prototyping.

K3 Scout

An 8.4m autonomous USV with 55-knot top speed, 650 NM range, and 600 kg modular payload capacity, available in three variants up to the 18.6m MAX with 10,000 kg payload and 2,000 NM range.

K4 Manta

An all-electric foiling uncrewed surface-subsurface vessel (USSV) that transits at up to 45 knots on the surface before submerging to 10m depth for covert ISR, loitering, or strike missions.

K5 Kraken

A 15.25m armed maritime precision engagement platform hitting 65 knots, carrying twin 7.62mm remote weapon stations, four multi-role missiles, and four aft-launched torpedoes for crewed or autonomous operations.

Leading exposed data intelligence platform with Gen AI Agents for threat detection that continuously monitors for exposed data and provides high fidelity intelligence for cybersecurity risk management.

Company Monitoring

A continuous alerting service that detects when an organisation or its third-party suppliers appear in data breaches, analysing exposed files to identify PII, credentials, financial documents, and source code.

Data Scanning

AI-powered analysis of breached datasets that extracts and classifies exposed data entities at a rate of 629 per second, enabling incident response teams to triage and remediate data exposures 41x faster than manual methods.

Company Scoring

A risk scoring engine that rates organisations based on the volume and sensitivity of their exposed data, used by cyber insurers, attack surface management providers, and supply chain security teams.

Designs and manufactures bespoke lithium-ion batteries and charging systems for military platforms, EOD robots, unmanned systems and defence prime contractors across NATO.

UK counter-drone company building the Air Intelligence System with PDAR passive RF detection (70 MHz to 6 GHz), Hera long-range cameras, Apollo acoustic direction finding, and Orion autonomous drone defeat effectors. Clients include the British Royal Navy, MOD and Civil Aviation Authority.

Plasma thruster propulsion systems for satellites and space vehicles. Oxford University spinout advancing in-orbit maneuvering.

Maritime autonomy software for uncrewed surface vessels, including GuardianAI for defence applications. Technology powered the Mayflower Autonomous Ship's transatlantic crossing and is used by Plymouth's USV cluster.

Builds AI-powered command and control systems for counter-drone defence, maritime security and critical infrastructure protection, deployed at over 60 sites worldwide.

Metahelios develops highly advanced cameras for defence and space applications using optical metasurfaces. The company is the first and only in the world to design and manufacture metasurface-integrated camera solutions, collaborating with the UK Ministry of Defence on imaging nanotechnologies for surveillance and material classification.

MGI Engineering's defence division applying Formula 1 rapid prototyping and lightweight composite expertise to autonomous platforms. Builds one-way effectors, heavy-lift UAVs, and the SkyShark drone that first flew in July 2025.

UK uncrewed systems specialist delivering the DART 250 one-way attack drone under a £7.5 million MoD contract. The system has a 250 km range and flies in terrain-following mode at 400+ km/h for land and maritime strike missions.

Designs, builds and operates manned and unmanned submersibles for military and commercial markets, including extra-large autonomous test submarines awarded a £1 million DASA contract for the Royal Navy. Operates from Plymouth with a sister facility in Round Rock, Texas.

Builds AI-powered airport and national infrastructure security screening products including Deeper Scan electronic-device validation and NexuSec natural-language CCTV search. Developed Deeper Scan with £80,000 DASA funding and Dstl technical support.

London defence tech startup building OccamX, a retrofit computer-vision autopilot for FPV drones that enables autonomous target tracking without GPS or continuous manual control. Raised €3M pre-seed and approved for Ukrainian Brave1 integration testing.

British defence technology company pioneering design, engineering and manufacture of unmanned aerial systems and precision strike payloads for defence applications.

Pholos

A 4.5 kg coaxial multi-role tactical UAV with static loiter capability, ultra-low noise signature, and interchangeable kinetic and non-kinetic payloads for precision strike and ISR missions.

PteroDynamics Transwing UAS

VTOL fixed-wing UAS with a folding Transwing design that combines vertical takeoff with long-range fixed-wing endurance, distributed exclusively by Overwatch in the UK, Saudi Arabia, and UAE.

HEX Munitions

A family of platform-agnostic kinetic payloads benchmarked to STANAG 4187 safety standards, available in multiple sizes and effects with supply-chain-resilient designs.

AI and robotics company developing human-like artificial intelligence solutions for defence, space and security sectors, including AVIS AI platform and STRIDER autonomous robots.

Award-winning quantum technology spinout from Oxford University developing quantum random number generators (QRNGs) that provide verifiably secure random numbers for cybersecurity applications.

Scotland-based defence AI company with the Deep Truth machine learning framework, the SkySpyke 360-degree passive counter-drone detection system, the WiSAD passive RF surveillance detector and the MASC AI-generated adaptive camouflage pattern generator.

Stirling-based SME producing lightweight, ballistic and blast-rated modular building blocks made from 100% recycled polypropylene. Awarded a £238,000 DASA contract with the UK MoD for force protection and vehicle checkpoint infrastructure.

Incident modelling consultancy building CBRN hazard, cyber attack, and disease dispersion simulation platforms for UK MoD, Dstl, and government agencies. Ploughshare spin-out commercialising Dstl research.

Provides drone detection services and autonomous defence solutions including counter-UAS systems, with global defence networks spanning 40+ countries.

Develops VOYAGER AI maritime autonomy software that converts crewed vessels into uncrewed surface vessels with IMO Degree 4 autonomy, sold to government and defence customers. Opened Southampton UK headquarters in 2025 with offices in USA, Canada and India.

Laser-based shot detection and positioning system for military rifles, enabling instant sniper location identification. DASA-funded.

Develops high-precision MEMS inertial and gravity sensors for navigation, aerospace, defence, and subsurface exploration applications.

Hardware-based ultra-low-latency encryption for data in motion, including the SAFE Series delivering 200 Gbps full duplex throughput and post-quantum crypto-agility. Raised £7.5M Series A in 2025 and supplies government, critical infrastructure, and telecom networks.

Slipstream Design develops advanced RF and digital signal processing systems for defence, security, telecommunications, and space. Their flagship ASTRO platform is an ultra-wideband adaptive radio processor delivering resilient sensing and communication technology for mission-critical operations in contested electromagnetic environments.

UK counter-UAV manufacturer producing the NightFighter family of portable and vehicle-mounted RF jammers, effective against UAVs at ranges beyond 5 km and certified to UK Defence Standards. Systems are in operational service with military and security forces across multiple jurisdictions.

Sovereign drone intelligence platform providing defence-grade autonomous BVLOS operations, multi-sensor capture and analytics for critical infrastructure and defence. Raised £8.3m seed in November 2025 led by Rokos Capital Management.

Cybersecurity spinout of the Exsel Group that licensed Dstl data-centric security research, commercialising Bastion — software that embeds encryption into each document so files remain secure even if the network is breached.

UK covert audio surveillance startup spun out of Dstl via Ploughshare. Its directional microphone arrays use patented acoustic shield signal processing for long-range intelligibility in noisy environments, aimed at law enforcement and intelligence users.

Edinburgh mathematical modelling consultancy building bespoke algorithms for space situational awareness, spacecraft thermal modelling and classified defence data projects. Longstanding partner of the European Space Agency and UK MoD's SEAS DTC programme.

Swansea University spin-out manufacturing life-like whole-body trauma training simulators for military combat medic and MERT training. Models are built from 3D CT and MRI imaging and replace animal and cadaveric training materials.

UK-registered defence platform unifying combat-proven Ukrainian unmanned systems, including MAGURA USVs, Nemesis strike drones and Fury ground robots. Raised $50M seed at a $1B valuation, with Ben Wallace on the board.

Recovery and recycling technology for aerospace composite waste, reducing defence supply chain dependency on virgin materials. NIF-backed.

AI computer vision for unmanned systems and counter-unmanned defence. Advanced surveillance and threat detection systems.

Belfast-based sovereign AI company building Collective, a modular AI operating system deployable on air-gapped, edge and on-prem infrastructure. Raised £10M Series A in 2025 and is one of only four SMEs holding an MoD enterprise agreement.

Zelim develops intelligent maritime safety and rescue technology to make oceans, seas and waterways safer. The company provides advanced detection, tracking, and alerting systems including ZOE (intelligent detection system), SWIFT (rapid man overboard recovery system), and GUARDIAN (uncrewed rescue vessel). Zelim serves the cruise/passenger and offshore energy sectors with ISO 9001 certified solutions.