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H55

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Developing certified technology solutions to make aviation clean, quite, efficient, affordable and ultimative autonomous

Sion, SwitzerlandFounded 2017Aviation
Valuation $50–100M Last recorded · 2024
Revenue $1–10M Latest reported FY
Headcount 100–500 Current team size
Total funding $50–100M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for H55 and the history behind them.

About H55

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.

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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.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2017
Headquarters
Sion, Switzerland
Employees
144
Open positions
2
Dealroom signal
73.1/100
Sub-industry
Clean Energy, Autonomous & Sensor Tech, Vehicle Production
Sector
Aviation, Aerospace, Solar Energy, Battery, Autonomous Mobility, Sustainable Development Goals, Aviation and Aerospace, Climate Tech
Technology
Deep Tech, Autonomous & Sensor Tech
Business model
Manufacturing
Client focus
b2b

Funding history

8 recorded events

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 ↗
Showing the latest 2 of 8 recorded eventsBook a demo for the full funding history →

Financials

Revenue over time

Revenue, earnings and other financial measures where available. Years marked “E” are estimates.

YearRevenueGrowth
2026
2025
2024
2023
2022
2021
2020 —
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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%
Summary metrics are public; monthly history is available with a demoCompare with peers →

Similar companies

Closest operating peers by Dealroom taxonomy

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Showing 8 of the closest matchesCompare every metric →

Investments and acquisitions

Capital deployed

Recent portfolio relationships for companies that also act as investors or acquirers.

Investors

7 investors on the cap table

From Dealroom's funding and investor records, grouped by the round each investor first entered.

Seed1 investor entered at this stage

  • European Innovation Council

Series A3 investors entered at this stage

  • +ND Capital
  • Tippet Venture Partners
  • RTX Ventures

Series B and later3 investors entered at this stage

  • Solar Impulse
  • Government of Canada
  • Government of Quebec
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.

Global footprint

Workforce and web traffic by country
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

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about H55 on X, ranked by likes and reposts, corporate channels excluded.

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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