Tonner Drones (formerly Delta Drone) is a French company specializing in unmanned technologies, security and logistics solutions, and aerospace and defense investments. Operating as an active holding company, it holds stakes in French drone and technology manufacturers like Diodon, Elistair, and Donecle. The company is actively expanding its presence in military and critical infrastructure systems through strategic asset acquisitions, such as purchasing Azur Drones’ Skeyetech portfolio.