Blykalla
Blykalla is an energy company in Stockholm, Sweden, founded in 2013. It has 3 recorded funding rounds, most recently a Venture Round in December 2025.
Building Europe's first advanced small modular reactor
- Headquarters
- Stockholm
- Employees
- 11–50
- Founded
- 2013
- Business Model
- B2B
- Website
- blykalla.com
- Last Round
- Venture RoundDec 2025
- Rounds
- 3
Indexed holds 3 funding rounds for this company. The full record is or through the API.
About
Blykalla is a Stockholm-based nuclear energy company building Europe's first advanced small modular reactor (SMR). Founded in 2013 as a spin-off from the Royal Institute of Technology (KTH) in Stockholm, the company's technology is based on 25+ years of research into lead-cooled fast reactor systems. Its flagship product, SEALER-55, is a 55MW lead-cooled fast reactor (LFR) designed for modular factory production and deployment at industrial sites. The reactors target electricity generation, district heating, hydrogen production, and other hard-to-abate industrial applications. Blykalla raised an 80 mSEK funding round in 2024 led by Norrsken Launcher and Nucleation Capital. The company aims to begin serial production of SEALER-55 units in the early 2030s and deploy 1,000 units globally.
Summary
It lists 11–50 employees. Its most recent funding was a Venture Round in Dec 2025.
Tech & App Stack
4 technologies & apps tracked
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Funding History
Dec 2025
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Funding: Series A through Venture Round. Amounts, valuations, and investors where available.
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