Portal Space Systems is developing solar thermal propulsion technology for in-space transportation. The company's Starburst and Supernova propulsion systems use concentrated solar energy to heat propellant, offering high-efficiency orbit transfers and maneuvers without the cost or complexity of electric propulsion or the fuel constraints of chemical rockets.
| Round | Amount | Valuation | Lead Investors | Date |
|---|---|---|---|---|
| Series A | $50M | $250M | Geodesic Capital | Apr 1, 2026 |