What Seaborg Technologies does

Saltfoss Energy (formerly Seaborg Technologies) is a Copenhagen-based nuclear technology developer founded in 2015 that designs the Compact Molten Salt Reactor (CMSR) and deploys it on modular floating Power Barges. The CMSR uses liquid fluoride salt as both fuel carrier and coolant, replacing solid fuel rods and high-pressure water cooling with a passive safety architecture that physically cannot melt down and self-shuts down in emergencies. The Power Barge is a serially produced, turnkey floating platform offering 200-800 MW per unit with a 24-year operational lifetime, enabling nuclear deployment at sites with water access globally.

The company's product architecture is platform-plus-deployment-model: the CMSR provides the underlying nuclear technology and the Power Barge provides the deployment infrastructure, together marketed as a single turnkey solution. Carbon intensity is cited at 12 gCO2eq/kWh, on par with wind and 98.5% lower than coal, supporting positioning as a low-carbon baseload alternative. Headcount is 101-250, anchored by CEO Troels Schönfeldt and co-founders Ask Emil Jensen, Esben Klinkby, and Navid Samandari, with research collaborations in place with DTU, Chalmers University of Technology, IndexProject, DAES, and Eurostars/Eureka.

The business model centers on direct enterprise sales of turnkey Power Barges to two primary segments: data center operators (primary, for AI-era baseload demand) and energy developers or utilities (secondary, for remote or island grid applications). The company has no disclosed paying customers and is currently soliciting co-development partners to underwrite first-of-a-kind energy projects. Pricing is quote-based on a project-by-project basis, with a stated goal of kWh pricing competitive with fossil fuels. Revenue mechanics will mix hardware sales or leasing of Power Barges with engineering and operational support services through co-development arrangements, though none of these streams have produced reported revenue as of the latest data.

Name

Seaborg Technologies

Legal name

Saltfoss Energy

Website

https://seaborg.co

Company type

Private

Founded year

2015

Operating status

Operating

Headcount range

101–250 employees

Short description

Saltfoss Energy (formerly Seaborg Technologies) develops the Compact Molten Salt Reactor (CMSR) deployed on floating Power Barges. The Copenhagen-based firm targets data center operators and energy developers with modular 200-800 MW nuclear power plants featuring a 24-year operational lifetime.

Ownership category

akta.pro rank

Product category

Nuclear Power Generation

NAICS

Nuclear Electric Power Generation (221113)

SIC

Cogeneration Services & Small Power Producers (4991)

akta.pro primary industry

Gen IV / Advanced Reactor Systems (SFR, LFR, GFR, MSR, HTGR, Microreactors) (EUAKADAC)

akta.pro secondary industry

Microreactor Power Generation (EUACADAG)

Keywords

• Molten salt reactor
• Small modular reactor
• Nuclear power plant
• Floating power barge
• Clean baseload energy

Headquarters

HQ city

Copenhagen

HQ country

Denmark

HQ region

Europe

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Technology or R&D, Personnel, Supply Chain, Operations, Infrastructure

Revenue model

1. Power Barge Sales/Leasing: Turnkey floating nuclear power plants sold or leased to enterprise customers, particularly data centers and energy infrastructure operators. Modular design enables scalable deployment from 200-800 MW per unit.
2. Co-development Projects: Joint energy project development with strategic partners, likely involving engineering services and ongoing operational support for deployed CMSR systems.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Seaborg Technologies (now Saltfoss Energy) develops and plans to deploy the Compact Molten Salt Reactor (CMSR), a next-generation nuclear reactor using liquid fluoride salt as both fuel carrier and coolant for inherent passive safety. The CMSR is packaged onto a serially produced floating power plant platform called the Power Barge, delivered as a turnkey 200–800 MW modular nuclear power unit with a 24-year operational lifetime, sold or leased to enterprise customers.

Product overview

Saltfoss Energy (formerly Seaborg Technologies) operates a platform-plus-deployment-model architecture consisting of two core products: the CMSR (Compact Molten Salt Reactor), a next-generation molten salt nuclear reactor technology, and the Power Barge, a turnkey floating power plant that deploys the CMSR. The CMSR serves as the underlying nuclear technology while the Power Barge provides the deployment infrastructure, enabling modular nuclear power generation from 200 to 800 MW with a 24-year operational lifetime.

Differentiator

Problem solved

Functional benefit

Products and services

• CMSR (Compact Molten Salt Reactor)

Quantifiable outcome

• 12 gCO2eq/kWh CO2 intensity - 98.5% lower than coal (820 gCO2eq/kWh)
• +1 more outcomes

Segments2 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature2 records

Partnerships

Four partnerships are on record, tiered core and minor.

• DTU (Technical University of Denmark)coreStrategic or Co-development PartnerAcademic research partner for nuclear technology development, likely contributing R&D expertise and institutional credibility to the CMSR program.
• IndexProjectminorStrategic or Co-development PartnerPartner organization supporting or collaborating on energy project development initiatives.
• Chalmers University of TechnologycoreStrategic or Co-development PartnerSwedish technical university partner contributing research and development expertise to nuclear technology projects.
• Eurostars/EurekacoreStrategic or Co-development PartnerEuropean joint R&D funding program supporting innovative SME projects; partnership signals EU-level recognition of the technology's innovation potential.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• Terrestrial Energy: Canadian developer of the Integral Molten Salt Reactor (IMSR), a Gen IV molten salt reactor. Most direct technology peer to Saltfoss's CMSR, targeting similar industrial and data center baseload power customers.
• Moltex Energy: UK/Canada-based developer of the Stable Salt Reactor, another molten salt–based Gen IV design. Competes for similar utility and industrial customers and pursues a comparable pre-commercial regulatory pathway.
• Kairos Power: US-based developer of the fluoride salt-cooled high-temperature reactor (KP-FHR), a Gen IV design using molten salt coolant. Direct MSR-adjacent technology peer targeting data center and industrial heat customers.
• Copenhagen Atomics: Danish thorium-fueled molten salt reactor developer and a fellow Copenhagen-based advanced nuclear startup. Closest geographic and technological peer, working on a related MSR architecture for commercial power generation.
• TerraPower: Bill Gates–backed Gen IV nuclear developer (Natrium sodium-cooled fast reactor). Competes for the same advanced reactor regulatory slots, hyperscaler offtake deals, and capital pool that Saltfoss targets.

Broad incumbents

• NuScale Power: US-listed SMR developer (light-water VOYGR design) that is further along the licensing and commercialization curve. Competes for the same data center and utility customers though with a different (PWR-derived) reactor technology.
• X-energy: US-based high-temperature gas-cooled SMR developer with Dow and Amazon as anchor customers. Competes directly with Saltfoss for hyperscaler SMR offtake agreements and advanced reactor capital.
• Westinghouse Electric Company: Established global nuclear OEM developing the AP300 SMR. A broad incumbent offering overlapping capabilities (SMRs, services, fuel) as part of a much wider nuclear portfolio, and a potential acquirer of niche advanced reactor developers.
• Rolls-Royce SMR: UK-led SMR consortium developing a 470 MW PWR-based small modular reactor. Competes for European utility and data center customers with a more conventional but further-advanced design.

Emerging players

• Last Energy: US/European small modular reactor developer pursuing factory-built microreactors for industrial and data center customers. Comparable product format (small, factory-produced, modular) even though reactor type differs.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/seaborgtech
• Facebookfacebook.com/seaborgian
• LinkedInlinkedin.com/company/seaborg

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds3 records

Investors4 records

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seaborg Technologies