Stuttgart-based developer and integrator of hydrogen-electric fuel-cell propulsion systems for aviation.
Propulsion Architecture
Hydrogen fuel cells, liquid-hydrogen storage integration and aircraft propulsion systems.
Primary Certification Context
Supplier / Component
Strengths
H2FLY reports development and integration of hydrogen-electric propulsion systems. Its parent Joby reported piloted liquid-hydrogen fuel-cell flights of the HY4 demonstrator in September 2023. H2FLY also reports developing the fuel-cell system for Joby’s hydrogen-electric demonstrator.
Sources: H2FLY, company profile; Joby, 7 September 2023.
Weaknesses / Open Questions
Demonstrator flights do not establish certification of a commercial propulsion product. Current product approval scope and third-party commercial deliveries require verification.
Last Updated
October 27, 2026
Hydrogen fuel cells; Hydrogen storage and delivery
System integrator
