The Startup Index

Companies across the energy transition worth tracking. Featured entries link to a full write-up; watchlist entries link out to the company itself.

FiberSense

Fiber-optic sensing for subsea cable and grid infrastructure, detecting threats in real time.

Repath

Physical climate risk analytics that turn the threat of extreme weather into a number investors can act on.

Energy Dome

CO2 battery technology for long-duration, grid-scale energy storage.

Nyobolt

Ultra-fast-charging EV battery technology, cutting charge times without sacrificing battery lifespan.

Verne

Cryo-compressed hydrogen for clean, always-on backup power, built to replace diesel generators.

Metafuels

Converts green hydrogen and captured CO2 into sustainable aviation fuel, at scale.

Synhelion

Solar-powered synthetic fuel, using concentrated sunlight to drive the fuel-making process itself.

Impossible Metals

Robotic, low-impact seabed collection of the critical minerals batteries and grid infrastructure depend on.

Submer

Liquid cooling for data centers, cutting the energy and water footprint of AI-driven power demand.

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