What is Impulse Space?
Impulse Space is an aerospace technology firm dedicated to transforming in-space mobility through the development of advanced, flight-proven space vehicles. Founded by industry veteran Tom Mueller, the company addresses the critical need for efficient payload transportation from Low Earth Orbit (LEO) to more complex destinations, including Medium Earth Orbit (MEO), Geostationary Orbit (GEO), and lunar trajectories.
The company's core product suite includes the Helios kick stage, powered by the high-energy Deneb engine, and the Mira vehicle, which provides precise maneuverability for rendezvous and proximity operations. By focusing on rapid responsiveness and high-performance logistics, Impulse Space serves as a vital link in the space economy, enabling commercial and government entities to execute complex missions with greater agility and reduced operational overhead.
How much funding has Impulse Space raised?
Impulse Space has raised a total of $1.8B across 6 funding rounds:
Angel/Seed
$20M
Other Financing Round
$10M
Series A
$45M
Series B
$150M
Series C
$300M
Series D
$500M
Angel/Seed (2022): $20M with participation from Founders Fund
Other Financing Round (2022): $10M led by Lux Capital
Series A (2023): $45M supported by RTX, Airbus Ventures, and Lux Capital
Series B (2024): $150M featuring Lux Capital, Founders Fund, RTX, and Alumni Ventures
Series C (2025): $300M backed by Linse Capital, Lux Capital, Founders Fund, and Valor Equity Partners
Series D (2026): $500M with participation from Lux Capital, 137 Ventures, Linse Capital, and Founders Fund
Key Investors in Impulse Space
Lux Capital
Lux Capital is a New York based venture capital firm that raises dedicated funds to invest in earlystage and growthstage companies at the intersection of science and technology, backing founders in frontier areas such as AI, robotics, space, defense, biotechnology, and advanced materials from seed through IPO or acquisition.
Founders Fund
Founders Fund invests in the world's most important and valuable companies across all geographies, sectors and stages. The firm's partners have been founders and early funders of companies including PayPal, SpaceX, Palantir, Anduril, Airbnb, Stripe and Facebook.
Linse Capital
Linse Capital is a venture capital firm that invests in late-stage technology companies in the transportation space, with a focus on high-growth infrastructure and mobility solutions.
What's next for Impulse Space?
With the successful closure of its Series D round, Impulse Space is positioned to transition from a development-focused entity to a high-volume operational provider. The strategic focus will likely shift toward scaling the production of the Helios and Mira fleets to meet the increasing demand for orbital transfer services. Furthermore, the company is expected to deepen its integration within the broader aerospace ecosystem, leveraging its partnerships with major defense and commercial stakeholders to secure long-term mission contracts.
As the space industry moves toward a more dynamic and congested orbital environment, Impulse Space's ability to provide reliable, on-demand mobility will be a key differentiator. Future milestones will likely include expanded flight testing, increased launch cadence, and the potential for new service offerings that capitalize on the company's proprietary propulsion and maneuvering technologies.
