Unastella is a Seoul-based rocket company building its own launch vehicles and engines for small satellites, with a longer-term bet on crewed suborbital flights. The new $24 million Series B puts the Unastella rocket startup in a stronger position to prove that South Korea can produce a real private launch business, not just another ambitious test program. That matters because launch is still brutally hard and capital-intensive. A handful of countries with deep state backing still dominate it. Founder and CEO Jae Park started the company in 2022 after years spent working on rocket engines in Korea and Germany.
What makes this round interesting isn’t just the size. It’s the timing. Unastella already flew UNA EXPRESS-I from South Korean soil in May 2025, and now it’s trying to turn that early proof into a repeatable commercial roadmap.
What does Unastella funding support in its rocket business?
Unastella isn’t just building a rocket and hoping customers show up later. It’s developing a stack of launch products and services around its electric pump-fed propulsion system. On the customer side, that includes ARC 100, a suborbital microgravity test service that targets roughly 100 km altitude, and APEX 400S, a dedicated launch service designed to place 400 kg-class satellites into 400–500 km sun-synchronous orbit with mission-specific insertion.
Under the hood, the company’s core hardware is the VOLTA-52H engine. It uses LOX and Jet A-1, produces 52 kN of thrust at sea level and 63.5 kN in vacuum, and runs on an electric motor pump feed system instead of a traditional turbopump. That choice is the whole point. Fewer moving parts. Lower system complexity. Faster development, even if it costs payload capacity.
The workflow is pretty direct. Unastella designs the propulsion system and builds major components. It runs tests, feeds the data back into the next iteration, and ties that into vehicle engineering and launch operations. The company wants a closed loop from design to manufacturing to testing to improvement, based on hardware validation rather than long paper exercises.
The customer experience is meant to be more predictable than the usual “wait for a rideshare slot and work around someone else’s mission” model. ARC 100 is pitched for repeat microgravity experiments in materials, biotech, defense, and sensor validation, with controlled dwell time and optional payload recovery. APEX 400S is pitched more like a dedicated orbital service. Clear payload class. Clear orbit profile. Clearer mission control for small-satellite operators.
How did Unastella funding help the rocket startup grow?
The founding story
Unastella was established in February 2022. Jae Park — also rendered in company materials as Park Jae-hong — founded it with a specific goal: build a private Korean launch company that could move from engine development to actual flight hardware fast, then stretch that capability toward crewed suborbital spaceflight.
That ambition sounds huge because it is. But Park didn’t come from outside the field. He’s spent his whole career in rocket propulsion. That’s the one background you’d want for this kind of bet.
Why Jae Park looks like a credible builder
Before Unastella, Park worked on combustion systems for Korea’s Nuri rocket at KARI, which was South Korea’s first domestically developed orbital launch vehicle. After that, he moved to the German Aerospace Center in Berlin and worked on European launch vehicle engines, then returned to Korea and joined another rocket startup before launching his own company. That’s not startup-theater experience. It’s deep propulsion work.
You can see that background in the company’s choices. Unastella went with the old, proven kerosene-and-liquid-oxygen combination. Then it paired that with electric motor pumps that simplify the engine architecture. Park’s own summary is blunt: “We’re a commercial launch company trying to get to market fast.”
Early execution, traction, and funding
For a 22-person team, Unastella has moved pretty quickly. The company attempted its first launch within 38 months of founding. It completed a 50-second combustor test in November 2023, flew UNA EXPRESS-I in May 2025, and used that mission as an end-to-end systems check across design, manufacturing, ground operations, and flight data. The rocket reached 10 km after an earlier failed attempt in November 2024.
It still isn’t generating revenue. But it has built relationships that matter. Korea’s national space agency has already flown components on UNA EXPRESS-I, and KARI transferred electric motor pump technology to the company. That’s a useful signal in a country where government institutions still matter a lot in launch.
Altos Ventures led the new $24 million Series B, with Korea Development Bank, Strong Ventures, and Hana Ventures participating. Total funding now stands at $44 million. Before this, Unastella raised a KRW 19.5 billion Series A in September 2024, and earlier pre-Series A financing brought cumulative funding to KRW 7.5 billion by June 2023, with Daekyo Investment leading an additional tranche. It also secured KRW 1.2 billion in Scale-up TIPS R&D support over 3 years.
Can the Unastella rocket startup beat Korea’s rivals?
Inside South Korea, the field is small but getting real. Hanwha Aerospace took over the government-built Nuri rocket after acquiring the full tech rights from KARI. Innospace has gone public and completed a suborbital launch. Perigee Aerospace is working on its Blue Whale rocket. None of them has pulled off a commercial orbital launch yet.
Unastella’s edge is simpler to explain than some deep-tech pitches. It builds key propulsion hardware in-house and controls its own design-test-launch loop. It also already has launch permits and a launch site in Korea. Its official materials also stress a concentrated domestic industrial base, with design, testing, and launch infrastructure clustered within about 200 km. That helps shorten iteration cycles and hold down cost.
Why this Unastella funding round matters
Launch startups don’t die because the idea is boring. They die in the gap between promising tests and dependable flight cadence. This round gives Unastella a shot at bridging that gap without trying to do everything at once.
The next big checkpoint is UNA EXPRESS-II, targeted for 2027, with a goal of reaching 100 km. Park has been clear that this is the mission he’s building toward because hitting that altitude could make Unastella a more credible partner for major Korean aerospace and defense groups. If that mission works, the company stops looking like a lab project and starts looking like a supplier.
The round says something about investor appetite, too. Backing a rocket company with no revenue is a hard ask unless people believe the team can turn technical progress into contracts later. Here, the pitch is speed, local control, and a product set that starts with small-satellite launches and microgravity testing instead of immediately trying to challenge Falcon 9. That’s a smarter place to begin.
How big is the market for the Unastella rocket startup?
The macro story is simple: more countries want sovereign launch capability, and more satellite operators want launch options that aren’t built entirely around giant U.S. providers. Grand View Research sized the global space launch services market at about $15 billion in 2023 and projects it to reach roughly $41 billion by 2030. That growth doesn’t guarantee winners. But it does explain why new entrants keep showing up.
Asia is getting more crowded fast. China’s Galactic Energy, LandSpace, and iSpace have already completed multiple launches. Japan’s H3, developed by JAXA and Mitsubishi, logged its first successful launch in 2024, while Interstellar Technologies keeps pushing on small launch. Australia’s Gilmour Space attempted its first orbital launch in 2026. Rocket Lab — founded in New Zealand and now Nasdaq-listed — is still the only Asian-founded company to prove there’s an actual commercial launch business here.
South Korea is also putting real money behind the category. KASA, created in 2024, committed $266 million over 7 years to expand launch infrastructure. That doesn’t remove the technical risk. But it does make the timing better for any company trying to build a domestic launch supply chain instead of outsourcing the hard parts abroad.
What to watch next from the Unastella rocket startup
Unastella has raised enough to stay in the race, and that alone stands out in a business where bad timing can kill even good engineering. But money isn’t the real test. Flight is.
The next thing that matters is whether UNA EXPRESS-II actually reaches 100 km in 2027 and whether that turns government relationships into commercial ones. If that happens, the Unastella rocket startup could become the clearest sign yet that South Korea’s private launch sector is finally leaving the prototype phase behind.
Read how XCENA raised $135M in Series B funding to build computational memory chips that reduce AI data bottlenecks and improve inference efficiency.
FAQ
– What funding did Unastella raise?
Unastella raised a $24 million Series B announced on June 1, 2026. Altos Ventures led the round, with Korea Development Bank, Strong Ventures, and Hana Ventures joining, and the company’s total funding reached $44 million after the raise.
– How does Unastella’s rocket system work?
Unastella builds launch vehicles around an electric motor pump-fed liquid engine rather than a traditional turbopump setup. Its VOLTA-52H engine runs on LOX and Jet A-1, and the company has paired that propulsion architecture with two commercial offers: the ARC 100 suborbital microgravity service and the APEX 400S small-satellite launch service.
– Who founded Unastella?
Jae Park founded Unastella in February 2022 after years working on rocket propulsion in both South Korea and Germany. His background includes combustion-system work on Korea’s Nuri rocket and later engine work at the German Aerospace Center in Berlin, which gives him real domain depth for a launch startup.
– Is Unastella in the small satellite launch market or the space tourism market?
Right now, it’s mainly a small satellite launch and suborbital testing company. The near-term business is built around orbital launch validation and services for small payloads, while crewed suborbital spaceflight is still the longer-range goal rather than the immediate product.
