Maneuverability when you need it. On demand.

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Portal Space Systems Raises $50 Million Series A to Advance Rapidly Maneuverable Spacecraft Capabilities

Space has changed, but spacecraft haven't. Static vehicles can't meet the demands of a dynamic environment. Chemical propulsion can't sustain maneuver, electric propulsion doesn't have the speed. We need a better spacecraft for this modern domain.

Supernova is our answer

A maneuverable, solar-thermal spacecraft engineered for persistent delta-v, on-demand autonomy, and real-time control.

6 km/s

delta-v

On-Standby

taskable in minutes

<24h

payload swap

Trans-orbital freedom.
Mission-ready capability.

Supernova delivers sustained maneuverability across orbits, from LEO to Cislunar space and back, with a multi-year life for persistent responsiveness.

For National Security

Respond fast. Shadow threats. Extend reach across orbital regimes.

Cislunar logistics & tactical mobility
Rapid-response capabilities
Space Domain Awareness (SDA)

For Science & Exploration

Deliver payloads. Hit tighter timelines. Push deeper into space.

Low-cost lunar insertion
Experimental platform deliver
Orbital repositioning for extended mission life

For commercial operators

Fix what’s failing. Service what matters. Move with purpose.

Constellation maintenance
Life extension & servicing
Debris mitigation with precision maneuvering

Solar Thermal Propulsion (STP)

Jeff Thornburg

CEO & CTO

From architecting the Raptor engine to pioneering liquid propulsion at NASA, Jeff Thornburg’s career has been defined by building what others thought impossible. Now, he’s applying decades of expertise to unlock a more agile, scalable future in space.

The Case for Solar Thermal

Solar thermal propulsion isn’t new and it’s far from unproven. Backed by decades of research and now Portal has modernized it through advanced materials and additive manufacturing, it’s finally ready to move from the lab to orbit.

Portal in Progress

We’re building fast, testing like we fly, and sharing our progress. Follow along for the latest updates as we validate Portal’s hardware and bring our spacecraft closer to flight.