# Kairos Power Raises $643M for Google Nuclear

> Kairos Power secures $643 million to build nuclear reactors for Google.
- Title: Kairos Power Raises $643M for Google Nuclear · Dealroom
- Summary: Kairos Power secures $643 million to build nuclear reactors for Google. Kairos Power raised $643 million in late-stage funding to build 500MW of advanced…
- Keywords: kairos power, google, nuclear reactors, molten salt reactor, hers 2, google ventures, samsung c&t, department of energy, startups, business, Kairos, Power
- Source: Dealroom — https://dealroom.co/news/163058-kairos-power-raises-643m-to-build-nuclear-reactors-for-google
- Published: 2026-10-15T23:45:26+00:00
- Read time: 1 min
- Topics: kairos power, google, nuclear reactors, molten salt reactor, hers 2, google ventures, samsung c&t, department of energy, startups, business
## Funding Round
Kairos Power raised $643 million in late-stage funding led by Google Ventures and Samsung C&T.
## Reactor Timeline
Hermes 2, a 50MW demonstration reactor, will switch on in 2030 to test technology for Google's 500MW reactors by 2035.
## Why Now?
Kairos must prove its unproven molten salt reactor works before scaling to power Google data centers.
## Key takeaway

Kairos Power raised $643 million in late-stage funding to build 500MW of advanced nuclear reactors for Google by 2035.