Alsym Energy, founded in 2015 in Massachusetts, makes non-flammable sodium-ion batteries for grid storage, data centres and industry. In June 2026 it partnered with Re:Build Manufacturing to scale US cell production.
At a glance
| Price from | Custom |
| Best for | Storage projects where fire safety is a priority |
From Alsym Energy's own website.
What stands out
- No thermal runaway risk
- Avoids lithium and cobalt
Worth knowing
- Lower energy density than lithium-ion
- Manufacturing scale-up still ahead
How it ranks
Alsym Energy is ranked 9th of 10 in Best Battery Startups (Lister Score 86.6).
#9 in Best Battery Startups · Lister Score 86.6
Alsym announced a 500 MWh sodium-ion storage deployment with Juniper Energy in May 2026..
| Rank | Best Battery Startups | Score |
|---|---|---|
| 1 | Form Energy | 97.0 |
| 2 | Group14 Technologies | 95.7 |
| 3 | Lyten | 94.4 |
| 4 | Verkor | 93.1 |
| 5 | Peak Energy | 91.8 |
| 6 | Nyobolt | 90.5 |
| 7 | EnerVenue | 89.2 |
| 8 | Base Power | 87.9 |
| 9 | Alsym Energy | 86.6 |
| 10 | Echion Technologies | 85.3 |
Frequently asked questions
How does Alsym Energy rank on Lister?
Alsym Energy is ranked 9th of 10 in Best Battery Startups (Lister Score 86.6).
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