Communications defence companies in Spain

Builds and operates a constellation of nanosatellites that deliver satellite IoT connectivity to remote assets in industries including energy, agriculture, logistics and defence.

FOSSASat

FOSSA's 3U nanosatellite platform designed for low Earth orbit missions. Each satellite generates over 30W of power, carries a software-defined radio for communications, and supports multiple payload types including LoRa IoT, RF sensing (SIGINT/ELINT) and earth observation. The modular design allows missions to be tailored for connectivity, situational awareness or imaging applications.

FOSSA Nexus

A ruggedised IoT device and gateway that connects remote assets to FOSSA's satellite network or to cellular networks (GSM, NB-IoT). It supports a wide range of external sensors for monitoring parameters such as temperature, pressure, humidity and voltage, runs on batteries or solar power, and is built for outdoor and industrial deployments in areas without conventional network coverage.

Ground Station

A turnkey ground station for LEO satellite operations, starting at €200,000. The system includes UHF Yagi and S-band parabolic antennas, software-defined radio hardware, and a remote operations capability so the station can be controlled from any mission operations centre. It supports autonomous satellite tracking and is designed for operators running small satellite constellations.

SatIoT

FOSSA's satellite IoT connectivity service, currently in a selective beta programme. It links devices equipped with a FOSSA Nexus gateway or direct LoRa connection to the satellite constellation, routes data through ground stations, and delivers it to customers via API. The service targets businesses with assets in unconnected areas and IoT platform providers who need a satellite backhaul layer.

Santander-based RF specialist building solid-state power amplifiers, block upconverters, and low-noise receivers for space and defence satellite communications. Certified as a PYME Innovadora and competing with US primes in European military RF.

AERTEC is an aerospace technology company with defence systems work spanning UAS platforms, GNC systems, aircraft weapon integration and advanced aerospace engineering.

GNC Systems

Guidance, navigation and control systems for aerospace and defence applications.

Madrid-based defence SatCom integrator supplying X, Ka, and Ku band satellite terminals for vehicular, naval, and aeronautical military platforms. Also builds RF frequency inhibitors, tactical LTE demonstrators, and command and control systems.

Small satellite manufacturer offering end-to-end nanosatellite missions and communication subsystems. Partnered with ESA and GMV on the Celeste IOD-1 in-orbit demonstrator launched in 2026.

Valencia-based photonics spinout of the NTC institute providing next-generation radar warning, signal intelligence, and countermeasures solutions for defence primes and government agencies. AQAP/PECAL 2110 NATO quality certified with deployed systems across three continents.

Madrid cybersecurity startup providing hardware-based encryption and authentication for IoT communications, giving machines unique identities. Signed an agreement with Indra to join the FCAS programme and collaborated with the Spanish Air Force on the BACSI project.

Spanish satellite network software specialist focused on interference management, signal monitoring, and electronic warfare tools for defence and commercial customers. Over 30 years building VSAT deployment and link budget solutions for governments and telcos worldwide.

UAV Navigation-Grupo Oesía develops autopilots, navigation systems and GNC solutions for UAVs, loitering munitions, target drones, C-UAS interceptors and USVs.

VECTOR-600

Autopilot product for larger or more demanding unmanned systems.