Aalo Atomics
Modular sodium-cooled reactors for data centres
Ranked #10 in Best Small Modular Reactor Companies.
Aalo Atomics, based in Austin, Texas, designs factory-built sodium-cooled reactors, including the 50-megawatt Aalo Pod for data centres. Its Aalo-X Critical Test Reactor reached criticality at Idaho National Laboratory on 4 July 2026 under the Department of Energy's reactor pilot programme.
At a glance
| Price from | Custom |
| Best for | Data centre developers planning on-site nuclear power |
From Aalo Atomics's own website.
What stands out
- Test reactor already reached criticality
- Fast build pace
Worth knowing
- Early commercial stage
- No commercial power plant built yet
How it ranks
Aalo Atomics is ranked 10th of 10 in Best Small Modular Reactor Companies (Lister Score 85.4).
#10 in Best Small Modular Reactor Companies · Lister Score 85.4
Aalo's Aalo-X Critical Test Reactor reached criticality at Idaho National Laboratory on 4 July 2026..
| Rank | Best Small Modular Reactor Companies | Score |
|---|---|---|
| 1 | GE Vernova Hitachi Nuclear Energy | 97.2 |
| 2 | NuScale Power | 95.9 |
| 3 | TerraPower | 94.8 |
| 4 | Rolls-Royce SMR | 93.6 |
| 5 | Kairos Power | 92.3 |
| 6 | X-energy | 91.0 |
| 7 | Holtec International | 89.7 |
| 8 | Oklo | 88.3 |
| 9 | Westinghouse | 86.9 |
| 10 | Aalo Atomics | 85.4 |
Frequently asked questions
How does Aalo Atomics rank on Lister?
Aalo Atomics is ranked 10th of 10 in Best Small Modular Reactor Companies (Lister Score 85.4).
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