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Saltfoss

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Developing a nuclear power plant concept based on a molten salt reactor, to provide abundant, affordable, and sustainable energy

Copenhagen, DenmarkFounded 2015Energy
Valuation $100–250M Last recorded · 2020
Headcount <100 Current team size
Total funding $10–50M Disclosed equity funding
Unlock exact values This page shows ranges. Dealroom has the exact numbers for Saltfoss and the history behind them.

About Saltfoss

Saltfoss, formerly Seaborg, is a startup that's innovating in the nuclear power industry. They are developing a new type of nuclear power plant that is fundamentally different from existing models. Their Compact Molten Salt Reactor (CMSR) is smaller, safer, more environmentally friendly, and cheaper than traditional nuclear reactors. The CMSR uses a liquid salt mixture as both fuel and coolant, which eliminates the need for constant cooling and reduces the risk of meltdowns or explosions. This also simplifies the design, reducing costs.

Seaborg's business model revolves around the production and deployment of their CMSR on Power Barges. These barges are modular, meaning they can be adjusted to produce between 200 to 800 MW of electricity, and have a lifespan of 24 years. This makes them a flexible and long-term solution for energy production.

Seaborg's target market includes any entities in need of large-scale, affordable, and sustainable energy. This could range from national governments to private corporations. Their competitive advantage lies in their ability to provide a safer, cheaper, and more sustainable alternative to both traditional nuclear power and fossil fuels.

In terms of revenue, Seaborg likely makes money by selling their CMSR Power Barges to clients, and potentially through partnerships for co-development of energy projects.

Source: Dealroom company data

At a glance

Status
Operational
Founded
2015
Headquarters
Copenhagen, Denmark
Employees
79
Open positions
None listed
Dealroom signal
85.8/100
Sub-industry
Clean Energy
Sector
Energy, Sustainable Development Goals, EIC, Nuclear Fission, Climate Tech, Nordic Rising Star 2022, Top 50 Nordic Rising Star 2022 Denmark, Novel Energy, Hard Tech, Horizon Europe
Technology
Hardware, Deep Tech
Business model
Manufacturing
Client focus
b2b
Investment activity
1 company, latest Jan 2021
Capital deployed
$0
Preferred round
CORPORATE SPINOUT

Funding history

6 recorded events

Company financing events and reported valuations.

Deal typeDateAmountValuationInvestorsSource
SEEDEquity / VC Jan 2023 $0 — Unruly Capital ↗
GRANT✓Other financing Mar 2022 $2.5M — European Innovation Council —
Showing the latest 2 of 6 recorded eventsBook a demo for the full funding history →

Financials

Revenue, earnings and profit over time

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

YearEBITDAMarginProfitMarginR&D
2026 — —
2025 — —
2024 — —
2023 — —
2022 — —
2021 — —
2020 — —
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Growth signals

Saltfoss website traffic

Latest recorded traffic for Saltfoss is 2.3K monthly website visits, down 4.2% over the last three months. Saltfoss's team grew 9.7% over the past year.

Latest monthly visits2.3K 3-month web change-4.2% 1-year team growth+9.7%
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

16 investors on the cap table

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

Seed8 investors entered at this stage

  • David Helgason
  • Lars Fløe Nielsen
  • PSV
  • Mette Fløe Nielsen
  • Peter Holm
  • The Index Project
  • European Innovation Council
  • Unruly Capital

Series A1 investor entered at this stage

  • Anders Holch Povlsen

Series B and later2 investors entered at this stage

  • Team Global
  • Heartland

Other known investors5 additional known investors

  • Carsten Bondo Ellegaard
  • Investbridge Capital
  • Lukasz Gadowski
  • Navid Samandari
  • Nordic Makers
Team profiled 18 named & role-tagged
Founders Hidden — book a demo/100 quality score
Key operators 11 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
3 countries with
team presence
🇩🇰 Denmark91.7%
🇸🇪 Sweden5%
🇰🇷 South Korea3.3%
3 countries shown

Market sentiment

Posts on X, past 7 days

An AI-synthesised read of the highest-engagement posts about Saltfoss 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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