Muon Space Soars with $146 Million Series B Funding

June 13, 2025, 9:33 am
Muon Space
Muon Space
BuildingDataGovTechGreenTechIndustryInformationPlatformProductSensorsSpace
Location: United States, California, Mountain View
Employees: 11-50
Founded date: 2021
Total raised: $262M
In the vast expanse of the cosmos, a new player is making waves. Muon Space, a Mountain View, California-based company, has successfully closed a substantial $146 million Series B funding round. This infusion of capital is not just a number; it represents a bold leap into the future of satellite technology.

The funding is split into two parts: $89.5 million from the Series B1 round and an earlier $56.5 million from the initial Series B close in August 2024. This latest round was led by Congruent Ventures, with participation from existing investors like Activate Capital, Acme Capital, Costanoa Ventures, and Radical Ventures. Newcomer ArcTern Ventures also joined the ranks, signaling strong confidence in Muon’s vision.

So, what does Muon Space plan to do with this financial boost? The company aims to scale its operations significantly. This includes ramping up satellite production, integrating essential components like propulsion systems, and expanding its global ground station network. The ambition is clear: to create a seamless, end-to-end satellite constellation system that delivers critical data in real-time.

At the heart of Muon’s operations is its proprietary technology stack, known as Halo. This innovative platform integrates advanced spacecraft platforms, payload management, and a software-defined orchestration layer. The result? High-performance capabilities that can take a satellite from concept to orbit with unprecedented efficiency.

A key milestone in this journey is Muon’s recent acquisition of Starlight Engines. This startup has developed a groundbreaking solid propellant Hall-effect thruster system. Unlike traditional propulsion systems that rely on costly and complex xenon or krypton fuels, Starlight’s technology offers a safe, affordable, and scalable alternative. This acquisition enhances Muon’s vertically integrated Halo platform, bringing propulsion capabilities in-house and further solidifying its position in the market.

The timing of this acquisition is crucial. As the demand for satellite technology surges, the need for reliable and cost-effective propulsion systems becomes paramount. Starlight’s thruster system eliminates many of the challenges associated with high-pressure fluid management, which has long been a bottleneck in space propulsion. This innovation not only simplifies integration but also allows for a more compact design, making it suitable for a range of spacecraft sizes.

In addition to technological advancements, Muon Space is expanding its physical footprint. The company has opened a new 130,000-square-foot facility in San Jose, California. This state-of-the-art production center is designed for high-throughput satellite manufacturing. With the capacity to produce up to 500 satellites annually, the facility features advanced cleanroom environments and dedicated areas for various operational needs, from assembly to testing.

The new site is a game-changer. It represents a tenfold expansion from Muon’s previous facility, allowing for a more streamlined production process. The flexible layout accommodates everything from spacecraft assembly to optical instrument integration. A 300 kW solar array powers much of the facility, underscoring Muon’s commitment to sustainability in its operations.

The momentum behind Muon Space is palpable. Since December, the company has grown its team by 50%. In 2024 alone, it signed over $100 million in new contracts, including a landmark agreement with Sierra Nevada Corporation (SNC) to develop next-generation satellites for the Vindlér commercial RF sensing constellation. This growth trajectory highlights the increasing demand for Muon’s innovative solutions in the satellite industry.

The space sector is evolving rapidly. As commercial, civil, and national security customers seek faster and more efficient satellite solutions, Muon Space is poised to meet these demands head-on. The company’s focus on delivering mission-optimized satellite constellation systems at scale is a significant shift in an industry that has traditionally operated at a slower pace.

In a world where data is king, the ability to gather and process information in real-time is invaluable. Muon’s commitment to high-performance constellations means that it can deliver these capabilities with speed and reliability. The integration of hardware, software, and operations into a single, vertically integrated platform sets Muon apart from its competitors.

As the company continues to expand its capabilities and refine its technology, the future looks bright. The combination of innovative propulsion systems, a robust production facility, and a clear vision for satellite constellations positions Muon Space as a leader in the space industry.

In conclusion, Muon Space is not just another startup; it’s a beacon of innovation in the satellite technology landscape. With $146 million in funding, a cutting-edge facility, and a commitment to excellence, Muon is ready to redefine what’s possible in space. The stars are not the limit; they are just the beginning.