Maritime Fusion
- Company typePrivate
- Founded2024
- HeadquartersSan Francisco, United States
- Headcount1–10
- GTM typeB2B
- OfferingHardware or Manufacturing
Maritime Fusion firmographics
Firmographics- Name
- Maritime Fusion
- Legal name
- Maritime Fusion
- Website
- https://maritimefusion.com
- Company type
- Private
- Founded year
- 2024
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Ownership category
- akta.pro rank
Maritime Fusion industry classification
Industry- Product category
- Fusion Energy Systems
- SIC
- Engines & Turbines (3510), Special Industry Machinery, Nec (3559)
- akta.pro primary industry
- Marine Hybrid & Electric Propulsion Systems (IMAJAHAC)
- akta.pro secondary industry
- Reactor Vessel, Internals & Primary Circuit Components (RPV, piping, pumps, valves) (EUAKADAE)
Keywords
Where Maritime Fusion is headquartered
LocationHeadquarters
- HQ city
- San Francisco
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
Maritime Fusion business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Technology or R&D, Personnel, Infrastructure, Supply Chain, Marketing or Sales, Operations
Revenue model
- Fusion Reactor Sales: First-of-a-kind Yinsen reactor (25-70 MWe) estimated to cost approximately $700M in overnight CapEx for first unit, with Nth-of-a-kind units projected to cost substantially less approaching $400M with mass manufacturing and cheaper HTS. Revenue from selling complete tokamak-based propulsion systems to commercial shipping and defense customers.
- HTS Cable Technology: SHIELD HTS cable technology for AI datacenters and power distribution applications. Targets datacenter operators requiring high-density power delivery solutions with 18-36 month payback and 3-6x lifetime ROI over 10-year operating window.
Go-to-market motion2 records
Distribution channels1 record
Marketing channels4 records
Maritime Fusion product offering
Product offeringCore offering
Maritime Fusion is developing the Yinsen reactor, a low-power-density high-temperature superconducting (HTS) tokamak fusion reactor targeting 130 MW fusion power and 25-70 MWe net electric output for maritime propulsion and off-grid energy applications, with first deployment targeted for 2032. Complementing the reactor, the company offers SHIELD (Superconducting High-Integrity Energy Link & Distribution), a patent-pending HTS power cable system carrying up to 8,000 amps in a sub-tennis-ball cross-section with effectively zero resistive loss, applicable to both AI datacenter power distribution and the Yinsen reactor's own power take-off.
Product overview
Maritime Fusion offers a portfolio of two core products: Yinsen, a low-power-density HTS tokamak fusion reactor for maritime propulsion and off-grid energy markets, and SHIELD, a high-temperature superconducting power distribution cable system. Yinsen targets commercial shipping and remote energy installations with 25-70 MWe reactors, while SHIELD provides lossless power distribution for both AI datacenter applications and maritime fusion power systems. Both products leverage high-temperature superconducting (HTS) magnet and cable technology developed in-house.
Differentiator
Problem solved
Functional benefit
Brands
- SHIELD: Superconducting High-Integrity Energy Link & Distribution - a high-temperature superconducting power cable system designed for AI datacenters and fusion applications, capable of carrying 8,000 amps in a cross-section smaller than a tennis ball.
- Yinsen
Products and services
- Yinsen Tokamak Fusion Reactor A low-power-density high-temperature superconducting (HTS) tokamak fusion reactor designed for maritime propulsion and off-grid energy applications. Yinsen targets 130 MW fusion power and 25-70 MWe net electric output, uses FLiBe coolant with supercritical CO2 balance-of-plant, a vanadium-alloy (V-4Cr-4Ti) vacuum vessel designed for 20-year lifetime, and a deliberately low 0.7 MW/m² power density to extend component lifetime. The complete propulsion system fits in ~6,000-7,000 m³ and is intended for commercial shipping companies, defense customers, and remote islanded energy installations.
- SHIELD HTS Power Cable SHIELD (Superconducting High-Integrity Energy Link & Distribution) is a patent-pending, cryogenically cooled high-temperature superconducting (HTS) power cable system designed for AI datacenter DC power distribution and fusion reactor power take-off. SHIELD carries up to 8,000 amps continuously in a cross-section smaller than a tennis ball with effectively zero resistive loss, operates at 70-77K, achieves under 50mV end-to-end voltage drop over 100m, and supports 54V DC distribution to rack level. For AI datacenters it enables 18-36 month payback and 3-6x lifetime ROI, recovers 6-8U of rack space, removes ~3.6 kW of in-rack PSU heat per rack, returns ~17% rack volume, and yields an +11% GPU density uplift, with integration into NVIDIA 800V DC reference architecture.
Quantifiable outcome
- Vacuum vessel lifetime extended to 20 years as a lifetime component (1,040 MW·yr integrated fusion energy)
- +5 more outcomes
Companies that use Maritime Fusion
Customer profileSegments3 records
Ideal customer profiles3 records
Maritime Fusion technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Integration1 record
Feature3 records
Maritime Fusion partnerships and signals
Strategic signalPartnerships
Two partnerships are on record, tiered core.
- Columbia UniversitycoreSponsored Research Agreement for advancing physics basis of Yinsen tokamak. Collaboration on May 2026 arXiv preprint detailing reactor concept.
- DIII-D National Fusion Facility (DOE)coreMaritime Fusion is a user at the Department of Energy's DIII-D National Fusion Facility, running experiments focused on pulse scenario development for Yinsen reactor.
Scale indicators5 records
Recent moves6 records
Expansion highlights5 records
Maritime Fusion competitors and assessment
Company assessmentDirect peers
- Commonwealth Fusion Systems: Closest direct peer—MIT-spinout building a high-field tokamak (SPARC) targeting Q>1 demonstration in 2027. Both pursue HTS-magnet tokamak fusion for commercial energy; CFS targets grid-scale while Maritime Fusion targets off-grid, making them the most analytically comparable fusion competitor in technology and physics approach.
- Tokamak Energy: UK-based spherical tokamak developer using HTS magnets (similar technology stack to Maritime Fusion). Pursuing commercial fusion with focus on compact, faster-to-deploy designs that align philosophically with Maritime Fusion's off-grid, low-power-density thesis.
- Helion Energy: Direct peer in commercial fusion pursuit, using a field-reversed configuration (FRC) instead of tokamak. Notable for securing the first fusion-power purchase agreement with Microsoft/Constellation, demonstrating the off-take commercial path Maritime Fusion aspires to in maritime and defense.
- TAE Technologies: Direct fusion peer pursuing field-reversed configuration with p-B11 fuel cycle; raised over $1.2B from Google, Chevron, and others. Represents the well-capitalized end of the private fusion competitive set that Maritime Fusion must differentiate from on capital, talent, and milestones.
- General Fusion: Direct peer pursuing magnetized target fusion (MTF) with magnetically-confined plasma compression. Recently restructured and pivoted toward a 'Lawson Machine' design; comparable in mission (commercial fusion) and stage though with a different technology architecture than Maritime Fusion's tokamak.
- VEIR: Closest direct peer to Maritime Fusion's SHIELD product—VEIR develops HTS overhead power transmission cables for data centers and grid applications, claiming similar lossless, high-current-density power delivery. Directly competes with SHIELD in the AI datacenter power distribution market.
Emerging players
- Zap Energy: Emerging peer using shear-flow-stabilized Z-pinch (no expensive magnets) to pursue low-cost fusion. Represents a potential alternative compact-fusion path that, if successful, could compete with Maritime Fusion's off-grid thesis on cost and capital efficiency.
- Type One Energy: Emerging peer pursuing stellarator fusion with HTS magnets, focused on utility-scale fusion. Philosophically aligned on HTS-magnet fusion but pursues a different magnetic confinement geometry than Maritime Fusion's tokamak.
Broad incumbents
- ABB Marine & Ports: Broad incumbent in marine electrification—ABB provides electric propulsion, energy storage, and integrated power systems for commercial and naval vessels. Represents the existing ecosystem Maritime Fusion must sell into, integrate with, and potentially partner or compete against for shipboard power system deployment.
- Wärtsilä: Broad incumbent supplying marine engines, propulsion systems, and decarbonization solutions (including future-fuel readiness for ammonia and hydrogen) to global shipping. Represents both a potential integration partner and a competitive incumbent for maritime energy systems if shipping operators choose future-fuels over fusion.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks6 records
Key highlights6 records
Customer concentration
Maritime Fusion social profiles
Digital presenceMaritime Fusion financial estimates
Financial estimateRevenue estimate
Valuation estimate
Maritime Fusion leadership team
Management profileNumber of profiles
Profiles2 records
Maritime Fusion funding detail
Funding detailFunding overview
Funding rounds3 records
Investors5 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Maritime Fusion M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Maritime Fusion
What does Maritime Fusion do?
Maritime Fusion is developing the Yinsen reactor, a low-power-density high-temperature superconducting (HTS) tokamak fusion reactor targeting 130 MW fusion power and 25-70 MWe net electric output for maritime propulsion and off-grid energy applications, with first deployment targeted for 2032. Complementing the reactor, the company offers SHIELD (Superconducting High-Integrity Energy Link & Distribution), a patent-pending HTS power cable system carrying up to 8,000 amps in a sub-tennis-ball cross-section with effectively zero resistive loss, applicable to both AI datacenter power distribution and the Yinsen reactor's own power take-off.
Is Maritime Fusion a public or private company?
Maritime Fusion is a private company. It is classified as venture growth investor backed and is currently operating.
When was Maritime Fusion founded?
Maritime Fusion was founded in 2024. It employs 1 to 10 people.
Where is Maritime Fusion based?
Maritime Fusion is headquartered in San Francisco, United States, in the North America region.
How does Maritime Fusion make money?
Two revenue lines are on record. Fusion Reactor Sales are the primary driver. The others are HTS Cable Technology.
Who are Maritime Fusion's main competitors?
Direct peers on record are Commonwealth Fusion Systems, Tokamak Energy, Helion Energy, TAE Technologies, General Fusion and VEIR. Emerging players are Zap Energy and Type One Energy. Broad incumbents are ABB Marine & Ports and Wärtsilä.
Does Maritime Fusion have an API?
No public API is recorded for Maritime Fusion.
What industry is Maritime Fusion in?
Maritime Fusion's product category is Fusion Energy Systems. Its primary akta.pro industry code is IMAJAHAC, Marine Hybrid & Electric Propulsion Systems, with a secondary code of EUAKADAE, Reactor Vessel, Internals & Primary Circuit Components (RPV, piping, pumps, valves). Its SIC code is 3510.