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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.

Valuation $0–100M
Revenue $1–10M
Headcount 100–500
Total funding $50–100M
Unlock exact values This page shows ranges. Dealroom has the exact numbers for H55 and the history behind them.

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
client focusb2btechnologyDeep TechtechnologyAutonomous & Sensor Techsub industryClean Energysub industryAutonomous & Sensor Techsub industryVehicle ProductionsectorAerospacebusiness modelManufacturingsectorSolar EnergysectorBatterysectorAutonomous MobilitysectorSustainable Development GoalssectorAviation and AerospacesectorClimate Tech

Valuation & funding

H55 funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
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
Showing 8 recorded eventsUnlock the complete deal history →

Financials

Revenue and workforce over time

Available revenue and workforce history. Fields without reported data are omitted.

YearRevenueGrowthEmployees
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
Company filings, research estimates and Dealroom dataOpen the full financial model →

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.

Latest monthly visits9.7K 3-month web change+22.8% 1-year team growth-5.3%
Monthly website visits113 observations · Feb 2017–Jul 2026
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Comparisons

H55 compared with similar companies

Dealroom’s weighted taxonomy model identifies the closest operating peers. Company identity and context stay open; selected comparison metrics preview what is available in the platform.

Showing 8 of the closest matchesCompare every metric →
Team profiled 10 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 5 quality Hidden — book a demo/100
Potential founders Hidden — book a demo likely future founders
Startup mafia Hidden — book a demo alumni-founded startups
Talent movements Hidden — book a demo in · Hidden — book a demo out past 12 months

Source: Dealroom Talent Intelligence.

Investors

7 investors on H55's cap table

Sourced from Dealroom's funding and investor records.

Seed 1 investor entered at this stage
European Innovation Council
Series A 3 investors entered at this stage
+ND Capital
Tippet Venture Partners
RTX Ventures
Series B+ 3 investors entered at this stage
Solar Impulse
Government of Canada
Government of Quebec

Global footprint

Where H55 has talent and traffic

Workforce by country
7 countries with
team presence
🇨🇭 Switzerland76.9%
🇨🇦 Canada8.6%
🇩🇪 Germany5.1%
🇺🇸 United States3.4%
🇬🇧 United Kingdom2.6%
Top 5 of 7 shown

In the news

Latest news about H55

Recent press, funding announcements, and product moves mentioning H55 — open to read from the original sources.

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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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