We are the team making hydrogen-electric flight a reality.
Who we are
H2FLY is a globally leading developer of integrated hydrogen fuel cell and liquid hydrogen (LH₂) tank systems for aviation, based in Stuttgart, Germany.
We develop, test, and integrate hydrogen-electric propulsion systems for aircraft manufacturers and operators worldwide — backed by a decade of flight-proven research and a vision to advance zero-emission aviation.
H2FLY and Joby Aviation. One mission. One team.
In 2021, Joby Aviation acquired H2FLY, bringing one of the world’s leading hydrogen-electric propulsion developers into Joby’s aviation ecosystem. The acquisition reflects a shared mission: to accelerate the path toward quiet, zero-emission aviation – combining Joby’s ambition in air mobility with H2FLY’s deep expertise in hydrogen-electric propulsion.
H2FLY continues operating from its base in Stuttgart, Germany, as a wholly owned subsidiary.
What defines our approach
-
Flight-proven
Every system we develop is validated through real flight operations — including the world’s first piloted liquid hydrogen flight with our HY4 demonstrator aircraft.
-
End-to-end responsibility
We take complete system responsibility — from fuel cell systems to liquid hydrogen storage, system integration, and ground operations.
-
Built for certification
From day one, we design with aviation certification requirements in mind — integrating safety, redundancy, and regulatory compliance into every decision.
-
Ecosystem thinking
Technology alone doesn’t decarbonize aviation. We work across the full hydrogen value chain — propulsion, infrastructure, and operations — to make zero-emission faviation operationally and commercially feasible.
-
0 +
Team members across engineering, testing, and operations
-
0 +
Years of hydrogen-electric aviation research and development
-
0
World firsts in hydrogen-electric flight
Hydrogen-electric flight has been proven in the air. Now we’re focused on bringing it to market.
From demonstration to market readiness
-
2025+
Advancing our propulsion systems toward certification readiness — with a focus on performance, integration, and scalability.
-
2028
Certification-ready components, kicking off the formal certification process with regulatory authorities.
-
2030+
Potential first commercial flights — starting with smaller aircraft applications and expanding from there.
Working together for the future of aviation
Progress in hydrogen aviation requires collaboration.We work with leading aerospace companies, research institutions, and airports to bring our vision of zero-emission flight to life.
From flight-proven research to market-ready systems.
We develop and deliver hydrogen-electric propulsion systems for hydrogen-powered aircraft and provide support with integration, infrastructure development and operations.
