Muon Space has secured $146 million in Series B funding to accelerate the development and production of its end-to-end satellite constellations, targeting defense and commercial applications. The Series B1 round, totaling $89.5 million, includes $44.5 million in equity led by Congruent Ventures and $45 million in credit facilities. The funding will support propulsion system integration, a new high-volume manufacturing facility in San Jose, and a major ramp-up in satellite production.
The company also announced the acquisition of Starlight Engines, bringing in-house a breakthrough zinc-based Hall-effect electric propulsion system. Unlike traditional xenon or krypton propellants, Starlight’s solid zinc fuel offers lower costs, simplified integration, and enhanced safety. This move vertically integrates propulsion into Muon’s Halo™ platform, enabling faster build cycles and improved mission reliability for spacecraft between 100kg and 500kg+.
To support increased demand, Muon has opened a 130,000-square-foot facility in Silicon Valley designed for vertically integrated, high-throughput satellite manufacturing. The new site can produce up to 500 satellites annually and features extensive cleanroom, integration, and testing facilities. Muon has already signed over $100 million in new contracts this year, including a partnership with SNC to support the Vindlér commercial RF sensing constellation.
• $146M Series B total includes $44.5M equity, $45M credit; led by Congruent Ventures
• Acquires Starlight Engines for zinc-based electric propulsion integration
• Opens 130,000-sq-ft San Jose facility with 70,000-sq-ft of manufacturing space
• Can build 500 satellites annually across 100–500kg+ classes
• Over $100M in new contracts signed in 2024, including with SNC’s Vindlér program
“High-performance constellations require the speed, cost, consistency, and performance of volume production – they can’t be built one satellite at a time,” said Jonny Dyer, CEO of Muon Space.
