Portal Space Systems has successfully raised $17.5 million in an oversubscribed seed funding round to advance the development of its innovative spacecraft, Supernova. This funding effort, led by AlleyCorp with contributions from several strategic investors, aims to propel the creation of Supernova, a pioneering multi-role spacecraft designed for dynamic and challenging space environments. The financial boost will facilitate a full-scale demonstration of Supernova, encompassing critical design reviews by 2025, propulsion tests, system integration, and a planned launch in mid-2026.
Supernova is engineered to offer unprecedented mission capabilities, including rapid maneuverability between various orbits, such as LEO to GEO within hours, thanks to its unique solar thermal propulsion system. This technology delivers the efficiency of nuclear thermal propulsion without the complexities of a fission reactor, significantly reducing costs and regulatory hurdles. The spacecraft’s adaptability allows for last-minute payload changes and compatibility with multiple launch providers, ensuring flexibility and control over mission timelines.
Portal Space Systems envisions scaling production to support a fleet of Supernova spacecraft post the 2026 demonstration mission. The company’s CEO, Jeff Thornburg, emphasizes the critical need for maneuverability in space operations, highlighting Supernova’s ability to deliver nuclear-like propulsion performance without the associated burdens. Investor Brannon Jones from AlleyCorp commends the spacecraft’s potential to revolutionize space maneuverability and extend mission lifespans.
Based in Bothell, Washington, Portal Space Systems is at the forefront of redefining space mobility with its advanced spacecraft technology, aimed at enhancing operational lifespans and mission flexibility for both commercial and defense sectors. The company is expanding its team and forging partnerships to drive the next generation of in-space mobility solutions.

