Unastella Secures $24 Million to Accelerate South Korea’s Private Space Race
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A Strategic Bet on Simplified Propulsion
The global race to dominate the small-satellite launch market is no longer just a contest between the U.S. and China. In South Korea, Unastella is attempting to carve out a niche by prioritizing speed-to-market over raw technical prestige. The Seoul-based startup recently closed a $24 million Series B funding round, led by Altos Ventures with participation from the Korea Development Bank, Strong Ventures, and Hana Ventures, bringing its total capital to $44 million.
While the industry often chases the most efficient or powerful engines, Unastella has taken a pragmatic approach to propulsion. The company utilizes a kerosene and liquid oxygen system—a reliable combination mirrored in SpaceX’s Falcon series—but replaces the complex, expensive turbopumps typically found in orbital rockets with an electric motor pump. This design choice, previously validated by the likes of Rocket Lab, significantly lowers the barrier to entry in terms of cost and manufacturing complexity.
The decision comes with a known trade-off: mass. Electric pumps are heavier than their turbopump counterparts, which naturally limits the maximum payload capacity. However, founder and CEO Jae Park views this as a commercial necessity rather than a technical failure. “We’re not an R&D group trying to build the most impressive rocket,” Park stated, emphasizing that the company’s goal is to establish a viable commercial launch cadence rather than winning an engineering trophy.
From Nuri to UNA EXPRESS
Unastella’s trajectory is deeply intertwined with South Korea’s national space ambitions. Park himself is a product of the country’s state-led aerospace push, having spent his early career developing combustion systems for the Nuri rocket—South Korea’s first indigenous orbital launch vehicle created by the Korea Aerospace Research Institute (KARI). After refining his expertise at the German Aerospace Center in Berlin, Park returned to Seoul to translate state-level engineering into a lean private enterprise.
This connection to the public sector has provided Unastella with an edge in technology transfer. KARI has already transferred electric motor pump technology to the startup, and the national space agency has utilized the UNA EXPRESS-I for component testing. In May 2025, the company successfully launched the UNA EXPRESS-I from South Korean soil, marking a critical end-to-end validation of their in-house design, manufacturing, and ground operations.
The company is now pivoting toward the UNA EXPRESS-II, targeted for launch next year. Reaching the 100-kilometer Karman line will be the definitive milestone Park needs to attract larger partnerships with South Korea’s aerospace and defense conglomerates, who are increasingly looking for private partners to handle tactical satellite deployments.
The Broader Asian Landscape
Unastella is operating within a rapidly fragmenting market. According to Grand View Research, the global space launch market is projected to grow from $15 billion in 2023 to roughly $41 billion by 2030. In South Korea, the competitive field is tightening. Hanwha Aerospace recently took over the Nuri rocket program, while other startups like Innospace and Perigee Aerospace are vying for the same small-sat customers.
However, South Korea is playing a game of catch-up compared to its neighbors. China’s commercial sector, led by firms like Galactic Energy and LandSpace, has already achieved multiple orbital successes. Japan’s JAXA-backed H3 rocket and startups like Interstellar Technologies provide a mature ecosystem for domestic launches. Even the Australian market is heating up with Gilmour Space attempting its first orbital flights.
The only Asian-founded company to achieve sustained, commercially viable orbital success remains Rocket Lab, which now trades on the Nasdaq. For Unastella, the $24 million injection is less about joining a trend and more about building the infrastructure necessary to ensure South Korea has a private-sector alternative to government-led launches. With the establishment of the Korea Aerospace Administration (KASA) in 2024 and a commitment of $266 million toward launch infrastructure, the government is signaling that the era of the ‘national rocket’ is transitioning into the era of the ‘commercial fleet.’
