The International Space Station has been humanity's orbital home for over 25 years. But its time is running out — NASA has scheduled the ISS for controlled deorbit in the early 2030s, and a new generation of private companies is racing to build its replacement. The stakes could not be higher: without a commercial successor, the United States risks ceding its continuous human presence in low Earth orbit to China's Tiangong station.
Here's where each of the four main contenders stands as of March 2026.
Vast — Haven Stations
Vast has emerged as arguably the strongest contender, buoyed by a recent $500 million funding round that pushed its total investment past $1 billion. What truly differentiates Vast is flight heritage: in 2025, the company became the only commercial space station venture to design, build, launch, operate, and deorbit its own spacecraft — Haven Demo.
- Haven-1 launch planned for 2027 aboard SpaceX Falcon 9
- Haven-2 first module launching 2028 on Falcon Heavy
- Full station completion targeted for 2032
- Crew capacity: up to 4 astronauts initially
[HIGHLIGHT]Vast is the only commercial space station company to have actually flown its own spacecraft in orbit — giving it a significant experience advantage over all competitors.[/HIGHLIGHT]
Axiom Space — ISS-First Strategy
Axiom Space in Houston is taking a different approach: rather than building a standalone station from scratch, it's attaching commercial modules to the existing ISS before eventually separating into a free-flying station.
This strategy has pros and cons. On the positive side, it allows Axiom to leverage ISS infrastructure and maintain crew access during the transition. On the negative side, Axiom's timeline is inherently tied to the ISS schedule, and any delays to the ISS retirement could complicate the separation plan.
- First module planned for ISS attachment in 2027
- Autonomous operation after two launches
- Separation planned approximately one year after second module
- Raised $350 million in late 2025
- Strong NASA relationship through private astronaut missions
Axiom's Private Astronaut Missions
Axiom has already conducted multiple private astronaut missions to the ISS, generating revenue and building operational experience. These missions serve as both a business line and a proving ground for the company's station operations capabilities.
Starlab — The European Partnership
Starlab is a joint venture between Voyager Space and Airbus, with Northrop Grumman joining the team in late 2023 after abandoning its own station concept. The station benefits from Airbus's world-class manufacturing capabilities and European Space Agency relationships.
- Passed Preliminary Design Review in March 2025
- Backed by $160 million NASA Space Act Agreement
- Northrop Grumman providing Cygnus-based cargo resupply
- Target operational date in the late 2020s
The multi-company structure introduces coordination challenges, but also brings deep aerospace expertise from multiple continents. Starlab could be an attractive option for NASA as a hedge against any single company's failure.
Blue Origin — Orbital Reef
Blue Origin's Orbital Reef concept was originally developed in partnership with Sierra Space as a "mixed-use business park in space." However, the project's scope has narrowed over time, and Sierra Space has pivoted to focus on its own Dream Chaser spaceplane and LIFE habitat independently.
- Received $130 million from NASA in Phase 1
- Jeff Bezos provides deep-pocket backing
- Partnership with Sierra Space has been restructured
- Less public momentum compared to Vast and Axiom
Blue Origin's attention has been heavily focused on its New Glenn launch vehicle, which successfully completed its first flight in early 2025. It remains to be seen whether the company will increase its commitment to Orbital Reef or let the concept evolve into something different.
The NASA Factor
NASA's Commercial LEO Destinations program is the single most important driver of this competition. The agency plans to select one or more companies for Phase 2 contracts in mid-2026, with awards potentially worth $1 billion to $1.5 billion.
Phase 2 will shift from funded Space Act Agreements to operational service contracts, where NASA purchases crew time and research capabilities from private station operators — becoming a tenant rather than a landlord.
Key evaluation criteria include:
1. Technical maturity and risk reduction
2. Business case viability beyond NASA as a customer
3. Timeline to operational capability
4. Safety and crew health standards
5. International partnership potential
What's at Stake
The commercial space station market extends far beyond NASA contracts. Industry analysts project a $37 billion market by 2035, driven by microgravity research and manufacturing, pharmaceutical development, advanced materials science, space tourism and media, national security applications, and international crew services.
The company — or companies — that successfully operate the next generation of space stations will have a foundational advantage in the emerging orbital economy.
[FAQ]
Q: When will the ISS be retired?
A: NASA has scheduled the International Space Station for controlled deorbit in the early 2030s, with SpaceX contracted to build the deorbit vehicle.
Q: Which company is closest to launching a commercial space station?
A: Vast appears closest, with Haven-1 targeting a 2027 launch and having already flown a pathfinder spacecraft (Haven Demo) in 2025.
Q: How much is NASA investing in commercial space stations?
A: NASA awarded $416 million in Phase 1 agreements and is expected to award $1-1.5 billion in Phase 2 contracts in mid-2026.
[/FAQ]