Hephaestus has raised $17.2M in a funding round led by CiRi Ventures to develop rare-earth-free HTS superconductors and build low-cost fusion power.
PRIVATEOct 21, 2026
Amount Raised
$17.2 Million
Round Type
Venture
Greater LondonEnergyRenewable Energy
Investors
Ciri Ventures
Description
Hephaestus exits stealth mode with significant funding to advance its technology. The company aims to supply rare-earth-free high-temperature superconductors. This funding will support their efforts in creating lower-cost fusion power solutions. The investment is expected to accelerate progress in sustainable energy.
Who to call at Hephaestus, and when
A new round usually means Hephaestus is about to hire and buy. The teams that reach out first get the meeting.
An alert the day Hephaestus raises, hires an executive or expands, scored against what you sell
The decision-makers there, with verified emails
Who you already know at Hephaestus, from your own LinkedIn network
Trusted byOracleSnowflakeCloudflareLinkedInGoogleSalesforce★★★★★4.8/5 on G2
Company Information
Company
Hephaestus
Location
Greater London, England, United Kingdom
About
Hephaestus is focused on developing rare-earth-free high-temperature superconductors and plans to build low-cost fusion power. The company has recently exited stealth with a significant funding round. Their innovations aim to revolutionize energy applications by eliminating dependence on rare-earth materials.
AI made execution free. Knowing first is the whole game now.
Fundz sees it the moment Hephaestus raises, hires an exec or expands, usually minutes after it happens, and tells you who to reach.
Greater LondonEnergyRenewable Energy