Crown Defence
Crown Defence builds ONYKS, a modular AI-enabled cognitive electronic warfare and counter-UAS platform developed in Finland for military and security forces.
Background
Crown Defence Oy was founded in 2023 and is headquartered in Espoo, Finland. CEO Jari Mielonen leads the company, which positions itself as a tactical defense-tech supplier focused on electromagnetic spectrum operations and counter-drone capability. No co-founder names or founding narrative have been disclosed publicly.
The core product is the ONYKS™ platform — a modular cognitive EW system covering counter-UAS detection and defeat, radar suppression, communications jamming, SIGINT collection, force protection, and offensive electromagnetic maneuver.
The portfolio has expanded to include ONYKS Sense, Guardian, Detector, Power, and ONYKS Edge as distinct capability modules. Crown states the architecture was shaped by lessons from active conflict environments, though independent confirmation of battlefield deployment is unavailable.
Crown targets defence forces, capability development organisations, and strategic partners. It has publicly signaled intent to support the European Drone Wall initiative and Finnish air defense.
The company is establishing operations in the United States and Ukraine. Third-party directories estimate 1–50 employees; no verified headcount has been published.