Reaction Engines' technology will contribute to the next generation of hypersonic flight and space access vehicles. The business is known for its Synergetic Air-Breathing Rocket Engine (SABRE), a hybrid engine blending jet and rocket technology that is capable of Mach 5 in air-breathing mode and Mach 25 in rocket mode for space flight.

As part of the SABRE programme, Reaction Engines developed an ultra-lightweight heat exchanger that stops engine components from overheating at high speeds, thus improving access to hypersonic flight and space.

Founded by three propulsion engineers in 1989, Reaction Engines produces robust technical designs for advanced heat exchangers, air-breathing engines, and the vehicles they could power. These capabilities may lead to high-speed point-to-point transport that is cost-effective and sustainable.