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Zephyr Fusion

Energy · San Diego, United States · Founded 2025

In-orbit megawatt-class fusion power for space industry MoreLess

Zephyr Fusion is developing an in-orbit, megawatt-class fusion power source to facilitate large-scale industrial activities in space. The company was founded by Dr. Galen Burke and Dr. Edward Hinson, who serve as co-founders. Both founders have PhDs in Nuclear Engineering and Engineering Physics and accumulated over 35 years of combined experience in experimental fusion research at institutions like Lawrence Livermore National Laboratory, Oak Ridge National Laboratory, and the University of Wisconsin-Madison. They have been collaborators since their time in graduate school in 2010.

Zephyr Fusion aims to address the power limitations of satellites, which typically operate on kilowatt-scale solar power, constraining high-power applications in orbit. The company's solution is a compact magnetic confinement system that leverages the vacuum of space, allowing for a dipole magnetic confinement device to create the large plasma confinement regions needed for fusion without requiring bulky reactor hardware. This approach is made viable by recent advancements in high-temperature superconductors (HTS) and significantly lower launch costs. The technology is designed to provide megawatt-class power at a fraction of the cost of equivalent solar arrays, potentially catalyzing a new space economy that includes large-scale industry, in-orbit data centers, and high-power electrical propulsion. The company is a Y Combinator participant and is seeking introductions to satellite, defense, and other teams with an interest in megawatt-class power in orbit.

Keywords: in-orbit fusion power, space industry, megawatt-class reactor, compact magnetic confinement, dipole magnetic confinement, high-temperature superconductors, space economy, satellite power source, plasma physics, nuclear engineering, deep tech, space propulsion, orbital power, fusion energy, Y Combinator, advanced energy, space technology, electrical propulsion, satellite technology, industrial space economy

Company overview

Zephyr Fusion company information

The essential company record, classifications and operating signals in one place.

Status
Operational
Founded
2025
Headquarters
San Diego, United States
Employees
8
Open positions
None listed
Dealroom signal
73.3
client focusb2btechnologyHardwaretechnologyDeep Techbusiness modelManufacturingsectorNuclear FusionsectorSpace TechsectorSpace ExplorationsectorSpace UtilitiessectorSpace UpstreamsectorNIF defense security and resiliencesectorNIF Energy Security and Climate ChangesectorYC F25sectorDT and LSsectorscience-based

Valuation & funding

Zephyr Fusion funding history

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SEEDEquity / VC May 2026 $0 Tekedia Capital
SEEDEquity / VC Sep 2025 $125K $500K Y Combinator
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Financials

Workforce over time

Available workforce history. Financial fields without reported data are omitted.

YearEmployees
2026 8
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Growth signals

Zephyr Fusion website traffic

Latest recorded traffic for Zephyr Fusion is 1.3K monthly website visits, down 43.5% over the last three months.

Latest monthly visits1.3K 3-month web change-43.5%
Monthly website visits9 observations · Nov 2025–Jul 2026
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Comparisons

Zephyr Fusion compared with similar companies

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Talent graph

Zephyr Fusion's talent

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Team profiled 1 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 1 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

4 investors on Zephyr Fusion's cap table

Sourced from Dealroom's funding and investor records. Investor profile links are shown where available.

Seed 2 investors entered at this stage
Y Combinator
Tekedia Capital
Other known 2 additional known investors
Pioneer Fund
Sterling Road

Global footprint

Where Zephyr Fusion has talent and traffic

Workforce by country
1 countries with
team presence
🇺🇸 United States100%
1 country shown

In the news

Latest news about Zephyr Fusion

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Market sentiment

What the market is saying about Zephyr Fusion

An AI-synthesized read of the highest-engagement posts about Zephyr Fusion 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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