Arinna raises $4M seed round to solve the space power problem

March 25, 2026 Tim Fernholz

Arinna builds solar cells specifically for spacecraft and has developed an ultrathin new material that it expects to be far more flexible and more efficient than current technology.

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With Sift, two ex-SpaceX engineers are bringing the software that helped launch rockets to the factory floor
With Sift, two ex-SpaceX engineers are bringing the software that helped launch rockets to the factory floor

Sift is building the data infrastructure for advanced manufacturing.

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Harbinger’s next product will be hybrid emergency vehicles
Harbinger’s next product will be hybrid emergency vehicles

The young California startup is already building RVs, FedEx vans, and box trucks. Now its hybrid powertrain...