Commercial space stations are racing to replace the ISS before it deorbits

NASA intends to deorbit the International Space Station in 2030, ending 30 years of continuous human presence in low Earth orbit. The plan has always depended on commercial companies being ready to take over by then. As of September 2026, none of them have a habitat module in orbit, and the timelines that remain are tight enough that the handoff is no longer a formality — it's a genuine scheduling risk with billions of dollars and America's continued presence in LEO riding on it.

This matters because the ISS isn't just a research lab. It's the anchor tenant for an entire industry — commercial cargo, crew transport, microgravity manufacturing, and astronaut training — that NASA is trying to hand off to the private sector rather than fund directly. If the commercial stations aren't ready when the ISS comes down, the United States loses its continuous LEO presence to China's Tiangong station, which has been crewed since 2022.

Four companies, four different bets

NASA's Commercial LEO Destinations (CLD) program made its first funded awards back in December 2021: a Nanoracks-led team including Voyager Space and Lockheed Martin (developing what's now called Starlab) received $160 million, a Blue Origin-led team with Sierra Space (Orbital Reef) got $130 million, and Northrop Grumman received $125.6 million to explore retrofitting existing station technology. Axiom Space, which had a head start with an existing $140 million NASA contract, took a different path entirely.

In 2024, NASA added $42 million to the Orbital Reef award and $57.5 million to Starlab to fund additional technical milestones — a sign that both programs needed more runway than originally planned. NASA's CLD Phase 2 awards, expected to be finalized in mid-2026, will determine which of these programs get continued funding through the critical build phase.

Axiom's hedge: attach first, detach later

Axiom Space's strategy is the most conservative of the four, and probably the smartest hedge against schedule risk. Rather than launching a free-flying station from scratch, Axiom plans to attach its first module — a Payload Power Thermal Module — directly to the ISS while the station is still operational. A second Habitat module follows, and the combined assembly is designed to detach and become an independent, free-flying station as early as 2028, two years before the ISS is scheduled to come down.

This approach lets Axiom test life-support and power systems while still physically connected to a working station, reducing the number of things that have to work perfectly on the first try. It also means Axiom doesn't need a fully independent station validated before the ISS deorbit deadline — just a module that's already flying and proven.

Vast is moving fastest, but with the smallest station

Vast's Haven-1 is the most aggressive near-term bet: a compact 14-ton station designed to launch in 2026 and host four-person crews for two-week stays, using SpaceX's Dragon capsule for transport. Haven-1 is explicitly a stepping stone rather than an ISS replacement — it's small, single-module, and not designed for long-duration occupation. Vast's real target is Haven-2, which the company is positioning as a CLD Phase 2 bid.

Starlab, the Voyager/Airbus/Northrop joint venture, is the furthest behind of the four. Its station design — a large habitat and laboratory module paired with a separate service module for power and propulsion — remains in the design phase, with a target launch around 2029. That's uncomfortably close to the 2030 ISS deorbit date, leaving almost no margin if development slips, which every station program in this list has already done at least once.

The real risk isn't technical — it's financial

Every company in the CLD program is operating on NASA seed funding that covers a fraction of total development cost; the rest has to come from private capital and future revenue commitments. Building and operating a crewed space station is a business model with no historical precedent at this scale — the ISS itself cost NASA and its partners roughly $150 billion to build and operate, financed entirely by government budgets, not commercial revenue.

The commercial stations are betting on a mix of NASA as an anchor customer (buying crew time and cargo services), other national space agencies, and private astronaut missions or in-space manufacturing revenue to make the economics work. None of that revenue is proven at scale yet, which means the same financing gap risk that has already forced two supplemental funding rounds for Orbital Reef and Starlab could recur.

What to watch

The CLD Phase 2 award decisions, expected mid-2026, are the next real signal — they'll show which programs NASA believes are closest to viability and which face further schedule slips. If Vast's Haven-1 launches on schedule this year and completes its crewed missions without incident, it becomes the strongest proof point that at least one company can execute on this business model. If Axiom's module attachment to the ISS slips into 2027 or later, the 2028 free-flying target becomes unrealistic, and the gap between ISS retirement and commercial readiness widens further.

For an industry watching from the outside — satellite operators, in-space manufacturing startups, and national space agencies planning their own LEO access — the practical takeaway is to not assume continuous U.S. commercial LEO access past 2030 is guaranteed. Contingency planning around a potential gap year, where no U.S. commercial station is fully operational, is a reasonable hedge given how many of these programs have already needed schedule and funding extensions.