Reactor
reactor.inc
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Financials
Funding and backers
Team
201-500
employees, estimated range
Backers
8
Abstract, Amplifypartners
Momentum
15/100
in the news
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
May 7
Launched on Hacker News Show HN: Real-time world model demo
Oct 2025
Website went live first capture in the Wayback Machine
Tractionpublic signals, read monthly
Web presence
top 5%
of 133.2M domains by links, Common Crawl
Backed byfrom the funds' portfolios and accelerator catalogs
Abstract 
Amplifypartners 
FPV Ventures 
Hawkhill 
Lightspeed Venture Partners 
Sapphire Ventures Investors in similar startupsfunds that back the companies most like this one
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News
Fusion Startup on a Shoestring Budget Spins Plasma With Salvaged Parts
Old tech gets revived with salvaged parts and supersonic speeds
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Report
Every New Reactor Needs Fuel: 3 Uranium Stocks Positioned for the Nuclear Buildout
Earlier this year, the U.S. Department of Energy launched the Nuclear Dominance 3x33 campaign to secure the domestic nuclear fuel supply.
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Report
Australia's 'incognito' nuclear reactor marks 20 years of innovation
Australia's only nuclear reactor is celebrating 20 years of producing vital ingredients for lifesaving medicine, critical electronic products and groundbreaking research.
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How to train a frontier-level world model
We are releasing and open-sourcing the model and training code, and sharing all the lessons we learned along the way in this blog post.
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Report
CLR: Computational Life Reactor
Run and inspect computational-life reactor experiments in the browser.
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US Air Force-backed KRONOS nuclear reactor gets high-power fuel boost
NANO Nuclear Energy and Quadrant Nuclear Industries join forces to supply HALEU fuel from Idaho National Laboratory.
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Show more news
Tech stack
The technologies known for Reactor, by layer.
Languages
Java
SQL
Frameworks & libraries
Hibernate
Spring Framework
Spring MVC
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Offices
Where the company hires and what each office is for
Cities
1
Hiring now
0
Countries
1
Dnipro
Ukraine
HQ
200-500 est. staff