💥 Nuclear is Back.

And these 40 Startups are redefining energy

Read time: 4 min

You want to hear my honest, unfiltered opinion on Nuclear, both Fusion and Fission.

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Let’s talk about power.

Real power.

The kind that runs cities, replaces fossil fuels, and doesn’t blink when the sun sets or the wind dies down.

Fusion and fission are no longer pipe dreams or science fiction subplots.

They’re here, raising billions, breaking records, and building the backbone of tomorrow’s energy system.

And today?

I'm giving you the full list of 40+ nuclear startups: fusion, fission, and everything in between, that are rewriting the energy playbook.

But before the list…

Let me say this:

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⚠️ Nuclear is fully back on the agenda.

For the last 30 years, it was the underdog.

Now?

It’s the comeback story of the decade.

Trump signed a $550 billion Nuclear deal with Japan
Fusion funding has crossed $9 billion.
SMRs are entering the grid in the next 24 months.
Microsoft and Google are signing fusion power deals.
The DOE is going full throttle on fission scale-ups.

There’s a $600B fusion market emerging, and not just one way to play it.
Tokamaks. Lasers. Mirrors. Stellarators. Railguns. Plasma shots. Portable reactors.

We’re in a moment where radically different bets are all sprinting toward the same finish line:

Abundant, clean, on-demand energy.

Some of these founders are betting on science.
Others? Betting on manufacturing.
And a few are just ruthlessly focused on getting something real online by 2026.

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Here’s the full breakdown:

🧨 Fusion Startups

🔦 Laser-Driven & Inertial Fusion

• 🇺🇸 Blue Laser Fusion ($37.5M)

• 🇬🇧 First Light Fusion ($135M+)

• 🇩🇪 Marvel Fusion (€385M)

• 🇺🇸 Pacific Fusion ($900M)

• 🇺🇸 Xcimer Energy ($100M)

…and more

🍩 Tokamaks

• 🇺🇸 Commonwealth Fusion Systems ($863M)

• 🇬🇧 Tokamak Energy ($125M)

• 🇨🇳 China Fusion Energy Co ($2.1B)

• 🇺🇸🇬🇧 Hephaestus Technologies ($8M)

• 🇫🇷 Firefly Fusion

• 🇮🇳 Pranos Fusion

⭐ Stellarators

• 🇩🇪 Proxima Fusion (€130M)

• 🇺🇸 Type One Energy ($82.4M)

• 🇫🇷 Renaissance Fusion (€47M)

• 🇺🇸 Thea Energy ($20M)

• 🇯🇵 Helical Fusion ($15.6M)

• 🇮🇱 nT-Tao ($28M)

🧲 Magneto-Inertial Fusion

• 🇺🇸 Helion Energy ($425M)

• 🇺🇸 Zap Energy ($130M)

• 🇺🇸 TAE Technologies ($1.3B)

• 🇺🇸 NearStar Fusion ($8M)

• 🇨🇦 General Fusion ($440M)

• 🇸🇪 Novatron ($19.5M)

💥 Next-Gen Fusion Concepts

• 🇺🇸 Realta Fusion ($36M)

• 🇺🇸 SHINE Technologies ($800M)

• 🇺🇸 Avalanche Energy ($40M + grants)

• 🇨🇭 Deutelio AG

• 🇬🇧 Astral Systems (£4.5M)

• 🇺🇸 Acceleron Fusion ($24M)

• 🇨🇦 Stellarex (DOE-backed)

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⚡️ Fission Startups (SMRs & Modular Reactors)

• 🇺🇸 Oklo ($400M)

• 🇺🇸 TerraPower ($1.4B)

• 🇺🇸 X-Energy ($700M)

• 🇺🇸 NuScale Power ($469.6M)

• 🇨🇦 Terrestrial Energy ($156.6M)

• 🇺🇸 Kairos Power ($303M DOE)

• 🇺🇸 NANO Nuclear Energy Inc ($250M)

• 🇩🇰 Copenhagen Atomics ($33.6M)

• 🇸🇪 Blykalla ($8.2M)

• 🇺🇸 USNC ($17.5M)

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These aren’t science experiments anymore.
This is go time.

Bill Gates is backing SMRs.
Sam Altman is building his own fission startup.
The DOE is fast-tracking nuclear approvals.

The nuclear stack is getting real.

If you’re investing in hard tech, or just want to understand where the real energy arbitrage is, this is where to look.

I’ve personally identified one fusion startup that could be a complete standout.

They’re targeting Net Energy Gain (Q>1) by 2028, while solving one of fusion’s biggest bottlenecks, the cost of superconductive magnets.

With my syndicate, we’re preparing to invest.
If you want to be part of it, just reply to this email or drop a note in the comments.

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Ready to go deeper?

Some of the startups above have raised their Series A and B rounds in just months.

They didn’t just get lucky, they had an unfair advantage.

The right strategy. The right tools. The right data.

I’ve pulled together everything that actually works: the tools, templates, and investor contacts those founders have used to raise enormous money.

📌 The Ultimate Investors List of Lists (12,000 VCs, FOs, Angels)
💰 The Investor List No One Talks About: 140 Family Offices
🦄 40 pitch decks that built Unicorns (how Airbnb, Coinbase, Canva got funded)
⚡️ The Ultimate Notion Data Room (all key docs you’ll EVER need)
🥇 The Most Successful Investor Update Template
📊 The Only Finance Tracker Your Startup Needs
⚖️ SAFE Note Dilution Calculator & Cap Table Builder
👯 Co-Founder Agreement Templates + Legal Clauses You Can’t Forget

Your move.

👉 Upgrade to get ALL OF IT in one go

Yoann