We track 71,000+ companies and rank them dynamically using our Seedtable Score – a score that uses quantitative and qualitative data points to signal the momentum behind a company. We then monitor the list manually leveraging our expertise as founders and investors.
There are 12 start-ups with an aggregate funding of $4.6b. The average funding per company in this subset is $414.9m.
Last update to the database: Feb 18, 2025. See changelog.
6
Funding Rounds
$577.8m
Money raised
Helion Energy is a fusion power company aiming to build the world's first fusion power plant.
5
Funding Rounds
$2.1b
Money raised
Commonwealth Fusion Systems is a Cambridge, Massachusetts-based research and development company developing fusion power systems based on ARC tokamak reactors.
2
Funding Rounds
$5.0m
Money raised
Avalanche Energy Designs is an American start-up company designing, testing, and building micro-fusion reactors.
2
Funding Rounds
$49.2m
Money raised
Renaissance Fusion is a nuclear fusion reactor manufacturer founded in 2020 by Francesco A Volpe.
7
Funding Rounds
$172.1m
Money raised
Tokamak Energy is a fusion energy producer founded in 2009 by Alan Sykes, David Kingham and Mikhail Gryaznevich.
7
Funding Rounds
$332.8m
Money raised
Zap Energy is developing compact fusion power that doesn't require magnets or lasers.
1
Funding Rounds
$150.0k
Money raised
HelicitySpace is a fusion propulsion and power company, developing technology for spacecraft.
2
Funding Rounds
$39.0m
Money raised
A company developing its own petawatt class and high energy laser system coupled with a sophisticated target physics infrastructure exclusively dedicated to commercial "neutron-lean" fusion energy.
1
Funding Rounds
$3.0m
Money raised
A nuclear fusion research company based in Tempe, Arizona.
11
Funding Rounds
$1.2b
Money raised
TAE Technologies, Inc., formerly known as Tri Alpha Energy, is a California-based renewable energy company focused on developing commercial fusion energy.
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