You asked about Fusion Energy

132 people built something like it. 19 are gone.

That is 15% of the ones whose fate we could settle, against 23% across the whole register. 8 were acquired.

Matching
147
Gone
15%
Median life
Acquired
8

Matching launches · 60 of 147

checked 9 hours ago · 250 probed today
LaunchedWhat it wasToday
2014-06-01
Building the world's first fusion power plant · helionenergy.com
still up
2025-01-01
Fusion reactors for ships · maritimefusion.com
still up
2025-09-01
Powering tomorrow's industrial revolution in space · zephyrfusion.com
still up
2021-01-01
Mobile Energy Storage Technology · moxionpower.com
gone
2023-02-28
scribblediffusion.com
moved
2022-10-12
stockai.com
unverified
2023-01-15
neuralframes.com
gone
2026-08-28
wilsonharper.net
unverified
2015-06-01
Oolu is one of the fastest growing off-grid solar firms in West Africa · oolusolar.com
acquired
2016-01-01
AI + Robotics for the Built World · geckorobotics.com
still up
2020-06-01
India's Largest EV charging network · statiq.in
still up
2015-01-01
Inspection software for renewable energy & sustainable infrastructure · zeitview.com
still up
2022-09-30
ghostlystock.com
still up
2023-10-17
riffusion.com
moved
2021-01-01
Protecting the grid today, preparing the grid for tomorrow · gridware.io
still up
2016-06-01
Making car ownership and management frictionless. · yoshimobility.com
still up
2016-06-01
A carbon MRV solution for energy and hard-to-abate sectors · validere.com
still up
2015-01-01
Sunrun for the developing world · thinkbright.mx
still up
2022-01-01
First electric business aircraft designed for hydrogen propulsion · beyond-aero.com
still up
2016-06-01
Raptor Maps builds software to manage the solar PV lifecycle. · raptormaps.com
still up
2022-09-08
tattoosai.com
still up
2021-01-01
Energy Orchestration Platform · enode.com
still up
2022-10-23
vectorart.ai
still up
2018-06-01
AI Platform for Efficient and Sustainable Operations · tenderd.com
still up
2023-01-01
Managed marketplace for solar in Latam · ruuf.cl
still up
2021-01-01
Modernizing commercial insurance · shepherdinsurance.com
still up
2023-04-20
comicsmaker.ai
still up
2022-09-08
prompthero.com
still up
2014-06-01
Emission free, always on power from advanced fission power plants. · oklo.com
acquired
2020-01-01
Enterprise software to quantify cost-effective decarbonization… · sinai.com
still up
2022-11-05
1sewn.com
still up
2022-06-01
Agentic AI for Power Projects and AI Infrastructure · paces.com
still up
2022-10-04
thisshirtexists.com
still up
2022-09-09
baible.com
still up
2015-06-01
Long range, wireless energy distribution that scales · reachpower.com
still up
2017-06-01
Sunfolding builds next generation infrastructure for solar farms. By… · sunfolding.com
gone
2022-06-27
orchid.gistnoesis.net
unverified
2023-06-01
Unmanned airships for inspecting our critical assets · hylight.aero
still up
2016-01-01
Data management platform for oil & gas assets · mineralsoft.com
acquired
2022-12-12
88stacks.com
moved
2020-06-01
Predictive battery management software for electrified fleets · zitara.com
still up
2024-06-01
autarc is the agentic OS for energy installers. · autarc.energy
still up
2022-06-01
Engineering the future of chemistry for natural resource extraction · maverickx.com
still up
2022-09-11
twofergoofer.com
moved
2019-01-01
We use solar and wind power to make zero net carbon electrofuels · prometheusfuels.com
still up
2017-06-01
Advano is a battery technology company that improve the longevity of… · advano.io
still up
2014-01-01
Enabling li-ion batteries to charge ultra fast without compromising… · gbatteries.com
still up
2022-01-01
Traceable AI for billion-dollar infrastructure. · korrai.com
still up
2022-10-19
latentspace.dev
unverified
2020-01-01
AI powered sensors that save energy, water and emissions · powerx.co
acquired
2022-01-01
Software to find the best sites for renewables on the electrical grid · niraenergy.com
still up
2017-06-01
Decarbonized heat and power cheaper than fossil fuels · airthium.com
still up
2021-06-01
Low-cost, high-scale EV charging platform for apartments (and more). · heycharge.com
still up
2023-04-14
clipdrop.co
still up
2021-06-01
Nuclear-inspired cooling that turns wasted power into more AI compute · ferveret.com
still up
2022-11-09
draw.nnc.ai
moved
2015-06-01
Reliable and affordable solar energy in developing countries. · sunfarmer.org
still up
2023-01-25
colab.research.google.com
still up
2023-06-01
Automating Compliance for Construction · dili.com
still up
2022-10-22
healthydiffusion.com
unverified

How this compares

Where they launched

share gone · line is the 23% average
  1. Show HN 2715%
  2. Y Combinator 9715%

Y Combinator reports its own outcomes, including acquisitions. The other two are judged by asking the domain, so they are not measured the same way and are never averaged together.

By year launched

share gone · line is the 23% average
  1. 2022 2814%
  2. 2023 2223%
  3. 2026 200%

Older launches have had longer to die, so this slope is expected. A year that broke it would mean something is wrong with the checking.

How this was made. Show HN entries are every post from 2021 to 2023 with at least five points that linked to its own domain; code hosts and free hosting are excluded, because a repository outlives the effort behind it. Product Hunt entries needed 100 votes — a far higher bar, so they are the promoted top slice rather than a like-for-like sample. Both are judged by asking the domain whether it still answers: gone means it no longer resolves, refuses the connection, serves a parking page, or says plainly that it shut down. An HTTP error is not counted as gone — a server answering 404 is one somebody still pays for, and an audit of 25 gone-calls found two such sites alive with only a moved homepage. Y Combinator entries use the status YC publishes itself, which is why only those can say acquired. Squatted domains — a lapsed name now serving somebody else's site — are not detected, so these figures run slightly low.