Communications defence companies in the UK
We track 29 defence communications companies in the UK, most of them in Cambridge and Fareham. 5 of them are hiring now, with 20+ open roles. Among them are Nu Quantum, Rowden Technologies and Windracers.
All Communications Companies in the UK
Builds quantum networking hardware that connects quantum processors into distributed computing architectures, enabling commercial-scale quantum computing.
Designs and manufactures edge computing, sensing and communications systems for defence, national security and resilience organisations operating in degraded or denied connectivity environments.
UK autonomous aviation company building Windracers ULTRA, a dual-use heavy-lift drone for defence resupply, reconnaissance, cargo and remote logistics missions.
Builds multi-link satellite communication terminals that connect simultaneously to multiple satellite networks and orbits from a single device, for defence and government applications.
Drone Defence develops counter-drone and airspace security systems for protected sites, combining drone detection, tracking, identification and defeat technologies.
Atheras Analytics develops AI software for resilient satellite networks, forecasting outages and optimising ground-segment and gateway decisions for mission-critical satcom operations.
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.
UK UAS developer designing, prototyping and manufacturing uncrewed aerial systems, avionics and mission platforms for civil and military customers in contested environments.
UK defence technology SME building data-driven training, performance analytics and decision-support products for military organisations at the tactical edge.
Domo Tactical Communications develops tactical wireless communications, MANET networking and video links for defence, public safety, unmanned systems and mission-critical operations.
Develops next-generation navigation and positioning software using Supercorrelation technology to enhance GNSS accuracy for smartphones, wearables and autonomous vehicles.
Aberdeen subsea robotics company developing uncrewed underwater deployment platforms, Loggerhead systems and cloud-edge control software for offshore operations.
Inzpire provides defence training, mission systems and operational support for military aviation, battlespace management and synthetic training programmes.
Maritime connectivity company building AI-driven 5G mesh networks for offshore, autonomous and contested environments. Selected for NATO DIANA Mission Track in 2026.
UK defence technology company building cyber electromagnetic activity, counter-UAS, counter-IED and electronic countermeasure systems for military and security customers.
Landguard Systems designs and manufactures specialist ISTAR radio systems, tracking devices and software-defined radios for government, defence and law-enforcement customers.
UK heavy-lift UAS manufacturer building all-electric VTOL logistics drones for military, government and commercial missions, including battlefield resupply and last-mile operations.
UK defence supplier providing intelligence collection, communications, electronic warfare, tactical systems and uncrewed systems technology to armed forces and police users.
Plextek provides advanced engineering and technology development for defence applications, including sensing, communications and mission-critical electronics.
Lancaster-based secure communications and detection specialist delivering voice, data and real-time connectivity systems for defence, emergency response and critical infrastructure.
Roke builds defence and security technologies across AI, autonomy, cyber, secure communications and electromagnetic-spectrum operations.
UK builder of remotely controlled uncrewed surface vessels with defence and security configurations for maritime missions that reduce personnel risk at sea.
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 tactical communications company building secure, resilient and deployable communications systems including SlingShot and GENSS for modern battlespace users.
SPX Communication Technologies develops spectrum monitoring, tactical COMINT, RF jamming, maritime RDF and counter-UAS capabilities for defence and security environments.
UK maritime technology company developing advanced surface and subsurface craft, including VICTA, MARS USV and CADDIS systems for contested littoral and defence missions.
Tactical Wireless develops secure resilient communications systems for remote and poorly connected locations, including military and police support applications.
Teleplan Forsberg delivers assured positioning, navigation and timing systems for mission-critical aerospace, defence, marine, security and space operations.
