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ZeroAvia

Retrofitting aircraft with hydrogen-electric engines

Overview

ZeroAvia develops hydrogen-electric propulsion for aircraft and focuses on retrofitting existing planes with a hydrogen-electric engine to cut emissions and operating costs. The engines run on green hydrogen produced via electrolysis and offer higher specific energy and lower maintenance costs than traditional jet engines, making them suitable for commercial aviation. The company targets retrofits that can cover most common flight missions—up to 300 nautical miles for small, 19-seat aircraft and up to 1000 nautical miles for larger 50-90 seat planes—thereby addressing 95%+ of today’s missions. This approach differentiates ZeroAvia from competitors by offering a retrofit path rather than building new aircraft from scratch, leveraging greener fuel and a cost-effective operating model, and aligning with global regulatory pushes toward net-zero emissions. The overarching goal is to make aviation substantially cleaner and steer the industry toward net-zero carbon emissions by 2050.

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About ZeroAvia

Simplify's Rating
Why ZeroAvia is rated
C
Rated B on Competitive Edge
Rated C on Growth Potential
Rated D+ on Differentiation

Industries

Industrial & ManufacturingEnergyAerospace

Company Size

51-200

Company Stage

Grant

Total Funding

$394M

Headquarters

Everett, WA

Founded

2017

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What believers are saying

  • ZeroAvia plans first ZA200 customer deliveries in 2027, with twenty annual units.
  • HyPRIME won UK Department for Transport backing and airport partners Birmingham and Bristol.
  • Christine Ourmières-Widener’s August 2026 CEO role aligns leadership with airlines and regulators.

What critics are saying

  • ZeroAvia laid off half its workforce in early 2026 after funding missed expectations.
  • The Everett factory closed; certification funding for the ZA601 is now on hold.
  • If 2027 customer deliveries slip, runway pressure forces a distressed sale or shutdown.

What makes ZeroAvia unique

  • ZeroAvia owns FAA and UK CAA certification pathways for hydrogen-electric propulsion.
  • Its ZA200 targets certified aircraft integration through Marshall Aerospace and Safran partnerships.
  • It combines airport hydrogen infrastructure with aircraft powertrains, spanning refueling, storage, and propulsion.

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Funding

Total Funding

$394M

Above

Industry Average

Funded Over

14 Rounds

Grant funding comparison data is currently unavailable. We're working to provide this information soon!
Grant Funding Comparison Coming Soon

Benefits

  • Health Insurance
  • Dental Insurance
  • Mental Health Support
  • Stock Options
  • Paid Vacation
  • Paid Holidays
  • Relocation Assistance
  • Performance Bonus
  • Wellness Program
  • Disability Insurance
  • Legal Services

Growth & Insights and Company News

6 month growth

-6%

1 year growth

0%

2 year growth

1%
Aviation International News
Nov 6th, 2026
ZeroAvia Maps Path to Hydrogen Fuel Cell Production

ZeroAvia maps path to hydrogen fuel cell production. CEO says series production in Scotland will start in late 2029 November 6, 2026 ZeroAvia plans to deliver its first ZA200 hydrogen fuel cell systems to customers in 2027 and start series production in Scotland around the end of 2029, CEO Christine Ourmières-Widener said on Wednesday at the HySky Society's annual Flying Hy hydrogen aviation summit. The 200-kilowatt ZA200 uses low-temperature fuel cells, a technology proven in other industries, to turn gaseous hydrogen into electricity for an aircraft's electric motors. Ourmières-Widener said ZeroAvia will have capacity to build up to 20 ZA200 systems a year starting in 2027. On the nine-level technology readiness scale, the ZA200 is at level 5, with components validated in a realistic environment. She expects it to reach level 6, a demonstrated prototype, next year. ZeroAvia plans to add 400- and 600-kilowatt versions. The fuel cell systems could power electric aircraft that take off vertically or from runways, military drones, and small utility airplanes such as trainers. Ourmières-Widener also made the case for replacing some batteries with fuel cells and hydrogen tanks to extend electric aircraft range. Defense customers value the low noise and heat of fuel cells, which make aircraft harder to detect, she explained. For single-aisle and widebody airliners, the company is developing high-temperature fuel cells that target 2.5 kilowatts per kilogram of system weight, versus 1 for the ZA200. Those fuel cells are at level 3, an early proof of concept, with production expected around 2035. "The way to get there and the first step to just prove to the world that it's working is maybe different from what we had in mind when we started the company," Ourmières-Widener said. She described the company's shift from building everything in-house toward relying more on partnerships, such as a July agreement with Marshall Aerospace, a UK firm that modifies certified aircraft under supplemental type certificates. ZeroAvia also began working with French engine maker Safran on high-temperature fuel cells in July. Early this year, ZeroAvia restructured to reduce cash burn, laying off about half of its workforce after a December funding round fell short of expectations. It has also closed its Everett, Washington factory, consolidating most staff at its base in Kemble, England, and labs in Kent. Founder Val Miftakhov stepped down as CEO in late May, and Ourmières-Widener succeeded him in August. Ourmières-Widener gave no update on funding or on certification of the full ZA600 powertrain, which pairs a 600-kilowatt fuel cell system with ZeroAvia's electric motor. ZeroAvia's Dornier 228 testbed flew 12 ZA600 powertrain test flights before testing paused in 2024, and Ourmières-Widener said the company has made more than 50 flights across generations of its power generation system. In July, ZeroAvia said it had no imminent flight testing planned. She said the first ZA200 units built for certification testing will be ready for a certified aircraft next year.

Associated Press
Oct 12th, 2026
Xcert AI launches Xcert 1.2 for aerospace certification, backed by ZeroAvia collaboration

Xcert AI, a Geneva-based startup, has launched Xcert 1.2, a platform that helps aerospace teams prepare for certification. The release builds on its EASA AI Olympics win and its work with ZeroAvia and other customers. The update extends the tool from requirements into verification and quality workflows. Teams can generate test specifications traced to requirements, find coverage gaps, and export controlled deliverables for review. ZeroAvia uses Xcert AI to review documents for its ZA200 during development. Managing director Gabriele Teofili said it surfaced points that manual editing had missed. Customers keep control of their data and can choose secured cloud or on-premises deployment. Qualified engineers remain accountable for every decision.

Air Cargo Week
Aug 27th, 2026
ZeroAvia appoints Christine Ourmières-Widener as Chief Executive Officer.

ZeroAvia appoints Christine Ourmières-Widener as Chief Executive Officer. * ZeroAvia has appointed Christine Ourmières-Widener as Chief Executive Officer as it advances the certification and commercialisation of its hydrogen-electric propulsion technologies. * The former TAP Air Portugal, Flybe and CityJet CEO will also continue as Chair of the Board. * She will lead ZeroAvia's next phase of growth across civil and defence aerospace markets. ZeroAvia, Inc. announced the appointment of Christine Ourmières-Widener as Chief Executive Officer, effective immediately. She will lead ZeroAvia as the company advances toward certification, commercialisation and market adoption of its hydrogen-electric propulsion technologies, and continues as Chair of the Board. Ourmières-Widener has served as Executive Chair of the Board since November 2025, having previously served as a Board Director since February 2021. With more than three decades of aviation leadership experience, Ourmières-Widener combines deep technical expertise with a proven track record of airline transformation and operational excellence. She previously served as Chief Executive Officer of TAP Air Portugal, Flybe and CityJet, held multiple senior leadership positions within the Air France-KLM Group, and served on the IATA Board of Governors. A trained aeronautical engineer, Ourmières-Widener began her career at Air France working on the Concorde before moving into senior commercial and executive leadership roles across the aviation sector. She is a Fellow of the Royal Academy of Engineering and a Fellow of the Royal Aeronautical Society, reflecting her contribution to both engineering and aviation leadership. Geoff Eisenberg, Board Director and Investor - Ecosystem Integrity Fund said: "The Board concluded that Christine has the experience, leadership and industry perspective to lead ZeroAvia through its next phase. Since assuming operational leadership of the business, she has strengthened the company's strategic focus and secured key partnerships, while bringing valuable insight from a distinguished career leading airlines." Christine Ourmières-Widener, Chair and Chief Executive Officer of ZeroAvia, said: "I am honoured to be appointed Chief Executive Officer of ZeroAvia at such an important moment for the company and the aviation industry. I understand the priorities of its customers and see huge potential for the business to unlock value across civil and defence aerospace markets. I look forward to leading ZeroAvia through its next phase as Air Cargo Inc. commercialise its products and continue to push the boundaries of the technology." ZeroAvia remains focused on accelerating the development and certification of its hydrogen-electric propulsion systems for aviation. Christine Ourmières-Widener, Executive Chair of ZeroAvia, said: "Hydrogen-electric propulsion has the potential to transform aerospace and defense applications, and collaboration is essential to accelerating that transition. By working hand-in-hand with Safran, we are helping to advance technologies that are critical to building a better, cleaner future for flight." Anastasiya Simsek is an award-winning journalist with a background in air cargo, news, medicine, and lifestyle reporting. For exclusive insights or to share your news, contact Anastasiya at [email protected]. LATAM Cargo becomes the first airline in the Americas to integrate IATA's DG AutoCheck. MAG reinforces operational strength with global certifications and record performance metrics.

Engadget
Aug 13th, 2026
The largest battery-electric plane ever made has flown for the first time.

The largest battery-electric plane ever made has flown for the first time. Heart Aerospace's X1 demonstrator flew for 27 minutes on $5 of electricity Heart Aerospace has announced the successful first flight of its prototype all-electric aircraft, the X1 demonstrator. X1 took off from Plattsburgh International Airport in Upstate New York and flew for 27 minutes, reaching an altitude of 1,100 feet, running entirely on its batteries. Heart added the flight, including takeoff and landing, consumed less than $5 worth of electricity, a useful selling point given the price of fuel. It has already earned praise from executives at United Airlines and Air Canada, who are interested in adding electric planes to its fleets. If Heart is successful, the X1 will be followed by the ES-30, a fixed-wing 30-seat hybrid model designed to service regional airports. The company's hope is that its planes can offer a far cheaper service for hopper flights currently operated by turboprop planes like the Embraer ERJ. It is aiming for an all-electric range of 125 miles, with that figure climbing to 500 miles with the hybrid engine. Heart's broader pitch is that it won't just be in the cheaper cost of electricity versus jet fuel that will make its plane affordable. Naturally, the cheaper maintenance and operation cost of electric motors, their better reliability will add to the balance sheet. Of more concern, perhaps, is Heart's belief that the ES-30, while operated by a single pilot initially, will enable autonomous service in the future. Right now, the company is aiming for the ES-30 to enter service by 2031, a date Engadget, Inc.'ll only say is "ambitious" by most plane development standards. The next decade does appear to be one in which a number of aviation startups are looking to offer their vision for the future of flight. Heart will be jostling for space alongside Boom Supersonic, Harbour Air, ZeroAvia, and Rolls-Royce. But, as Engadget, Inc. opined back in 2021, the future of electric flight is entirely dependent on batteries getting a lot denser and lighter compared to their current-day equivalents.

AdvanceH2
Aug 6th, 2026
ZeroAvia launches groundbreaking hydrogen airport infrastructure for a sustainable aviation future.

ZeroAvia launches groundbreaking hydrogen airport infrastructure for a sustainable aviation future. Key points. * ZeroAvia is spearheading a UK government-funded project to enhance hydrogen refuelling infrastructure. * The HyPRIME initiative aims to demonstrate the feasibility of hydrogen in aviation. * This project aligns with global goals to reduce carbon emissions in the aviation sector. * The initiative seeks to showcase hydrogen's potential as a sustainable energy source for airports. ZeroAvia, a pioneer in hydrogen-powered aviation, is set to lead an innovative project under the UK government's HyPRIME initiative, aimed at developing hydrogen refuelling infrastructure for airports. This initiative reflects a significant step forward in the quest for sustainable aviation solutions, particularly as the aviation industry faces increasing pressure to decarbonize and reduce its carbon footprint. The HyPRIME project is designed to demonstrate the practicality and effectiveness of hydrogen as a viable energy source for aircraft refueling, potentially transforming how airports operate and manage sustainable energy resources. The project's objectives include not only the establishment of hydrogen refueling stations at airports but also the integration of these facilities into the existing aviation infrastructure. It aims to validate the technical capabilities and economic feasibility of hydrogen systems, positioning them as a key component in the ongoing efforts to achieve net-zero emissions in aviation. With governments and organizations worldwide committing to reducing greenhouse gas emissions, ZeroAvia's work under the HyPRIME project reflects a growing recognition of hydrogen's role in sustainable transport solutions. Through this project, ZeroAvia seeks to address the challenges associated with hydrogen storage, distribution, and refueling, ensuring that the necessary infrastructure is in place to support the increasing adoption of hydrogen-powered aircraft. The initiative is expected to attract interest from various stakeholders, including airport authorities, airlines, and energy providers, all of whom have a vested interest in promoting environmentally friendly aviation practices. In summary, the HyPRIME project represents a crucial step towards the integration of hydrogen into the aviation sector, showcasing the potential for airports to become hubs of renewable energy and sustainable practices. By demonstrating the feasibility of hydrogen infrastructure in aviation, ZeroAvia and its partners aim to position the UK as a leader in sustainable aviation technology, paving the way for a greener future in air travel. August 6, 2026 at 10:10 PM United Kingdom

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