H
H55
Aviation · Sion, Switzerland · Founded 2017
Developing certified technology solutions to make aviation clean, quite, efficient, affordable and ultimative autonomous MoreLess
H55 is a pioneering startup in the electric aviation industry, focusing on making air transport quieter and cleaner. The company provides certified electric propulsion solutions, which means they develop and supply electric engines and related technologies that meet strict aviation safety standards. H55 is a spinoff from the Solar Impulse project, known for its solar-powered aircraft that flew around the world without using any fuel, showcasing the potential of clean energy technologies.
H55's primary clients include aircraft manufacturers, urban air mobility companies, and other aviation industry stakeholders who are looking to adopt electric propulsion systems. The market it operates in is the burgeoning electric aviation sector, which includes applications like flying taxis and vertical take-off and landing (VTOL) aircraft. This market is driven by the need for sustainable and efficient transportation solutions in urban environments.
The business model of H55 revolves around the development, certification, and sale of electric propulsion systems. They make money by selling these systems to aircraft manufacturers and other clients who integrate them into their own products. Additionally, H55 may offer consulting services and support for the integration and maintenance of their propulsion systems.
H55 leverages its extensive experience from the Solar Impulse project, where electric airplanes flew over 1,500 hours and even completed a round-the-world trip. This experience underpins their credibility and expertise in the field. The company emphasizes innovation through certification, meaning they use the rigorous process of meeting aviation standards as a way to drive technological advancements.
In summary, H55 is at the forefront of the electric aviation revolution, providing certified, clean, and efficient propulsion solutions to a growing market. Their business model is based on selling these advanced systems and offering related services, all while contributing to a quieter and more sustainable future for air transport.
Keywords: electric aviation, propulsion solutions, clean energy, certified systems, urban air mobility, flying taxis, VTOL, Solar Impulse, sustainable transport, aviation innovation.
Company overview
H55 company information
The essential company record, classifications and operating signals in one place.
- Status
- Operational
- Founded
- 2017
- Headquarters
- Sion, Switzerland
- Employees
- 144
- Open positions
- 2
- Dealroom signal
- 73.1
Valuation & funding
H55 funding history
Company financing events and reported valuations.
| Deal type | Date | Amount | Valuation | Investors | Source |
|---|---|---|---|---|---|
| SERIES COther financing | Jul 2024 | $18M | $73M | Government of Quebec | ↗ |
| SERIES COther financing | Sep 2023 | $41M | $165M | RTX Ventures · +ND Capital · Tippet Venture Partners | ↗ |
| DEBTDebt | Mar 2023 | $10M | — | Government of Canada | ↗ |
| EARLY VCOther financing | Oct 2022 | $0 | — | RTX Ventures | ↗ |
| EARLY VCOther financing | Dec 2020 | $18M | $73M | Tippet Venture Partners · +ND Capital | — |
| GRANTOther financing | Dec 2018 | European Innovation Council | — | ||
| EARLY VCOther financing | Feb 2018 | +ND Capital | ↗ | ||
| CORPORATE SPINOUTOther financing | Jun 2015 | Solar Impulse | — |
Financials
Revenue and workforce over time
Available revenue and workforce history. Fields without reported data are omitted.
| Year | Revenue | Growth | Employees |
|---|---|---|---|
| 2026 | $4.9M | 0% | 144 |
| 2025 | $4.9M | 0% | 152 |
| 2024 | $4.9M | 0% | 127 |
| 2023 | $4.9M | 0% | 105 |
| 2022 | $4.9M | 0% | 64 |
| 2021 | $4.9M | 0% | 36 |
| 2020 | $4.9M | — | 27 |
Growth signals
H55 website traffic
Latest recorded traffic for H55 is 9.7K monthly website visits, up 22.8% over the last three months. H55's team declined 5.3% over the past year.
Comparisons
H55 compared with similar companies
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Talent graph
H55's talent
Source: Dealroom Talent Intelligence.
Investors
7 investors on H55's cap table
Sourced from Dealroom's funding and investor records.







Global footprint
Where H55 has talent and traffic
team presence
In the news
Latest news about H55
Recent press, funding announcements, and product moves mentioning H55 — open to read from the original sources.
Market sentiment
What the market is saying about H55
An AI-synthesized read of the highest-engagement posts about H55 on X over the past 7 days. We rank by likes & retweets, ignore corporate channels, and surface the themes that broke out from real people.
Reading the room on X — pulling top posts and synthesizing themes…
Source: X recent search ranked by engagement (likes + retweets) · Synthesis by Claude · Cached for 1 hour
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