As the International Space Station approaches retirement, NASA faces one of the most significant transitions in its history: shifting from building and operating its own space station to purchasing services from private companies. The mechanism for this transition is the Commercial LEO Destinations (CLD) program — a multi-billion-dollar initiative that will determine who builds humanity's next orbital infrastructure.
The Strategic Context
For over two decades, the ISS has served as humanity's primary outpost in low Earth orbit. NASA operates the station at a cost of approximately $3-4 billion per year — roughly half of the agency's human spaceflight budget. The agency's leadership concluded that this funding could be better directed toward deep space exploration (Artemis, lunar surface operations) if commercial providers could take over LEO operations at lower cost.
The model mirrors NASA's successful Commercial Crew and Commercial Cargo programs, which transitioned ISS crew and cargo transportation from government-operated vehicles (Space Shuttle) to private services (SpaceX Dragon, Boeing Starliner, Northrop Grumman Cygnus).
[HIGHLIGHT]NASA's strategy is to become a customer of commercial space stations rather than an operator — freeing up $3-4 billion annually in human spaceflight budget for deep space exploration.[/HIGHLIGHT]
Phase 1: Design and Development (2021-2025)
In December 2021, NASA awarded a combined $416 million to three teams to design and develop commercial space station concepts:
[STATS]
Starlab (Nanoracks/Voyager) | $160M
Blue Origin (Orbital Reef) | $130M
Northrop Grumman | $125.6M
CLD Total Phase 1 | $416M
[/STATS]
Axiom Space had separately won a $140 million contract to build modules for attachment to the ISS — a related but distinct pathway to the same goal.
Key Phase 1 Developments
Several significant shifts occurred during Phase 1 that reshaped the competitive landscape:
1. Northrop Grumman withdrew from its own station concept in October 2023, joining the Starlab team instead and committing to develop an autonomous docking system for its Cygnus cargo ship
2. Northrop received $36.6 million of its original $125.6 million award before redirecting
3. Axiom Space revised its assembly plans in December 2024, enabling autonomous operation after just two launches rather than the originally planned four
4. Vast, though not a Phase 1 awardee, secured an unfunded Space Act Agreement with NASA, allowing it to participate in the CLD ecosystem without government funding
5. Blue Origin's Orbital Reef partnership with Sierra Space evolved, with Sierra Space increasingly focusing on its own Dream Chaser spaceplane and LIFE habitat independently
The Phase 2 Pivot (2025)
In late July 2025, NASA made a significant strategic adjustment to Phase 2. The agency moved away from its original plan of fixed-price contracts for station certification and services, instead adopting funded Space Act Agreements (SAAs) to support multiple station development efforts simultaneously.
This pivot reflected several realities:
- No single company had demonstrated sufficient technical maturity for NASA to commit to a single provider
- The geopolitical urgency of maintaining U.S. orbital presence increased as China expanded Tiangong operations
- Congress signaled support for maintaining competitive pressure among multiple providers
- Technical and schedule risks favored a portfolio approach over a single-point-of-failure strategy
What Phase 2 Contracts Include
Phase 2 agreements are expected to cover:
- Continued station development and manufacturing
- Crew and cargo transportation integration
- Safety certification and crew health standards
- Initial operational demonstration missions
- Transition planning for ISS research migration
The total Phase 2 funding is estimated at $1 billion to $1.5 billion, with awards expected in mid-2026.
The Competitors
As of March 2026, four primary competitors are positioned for CLD Phase 2:
Vast (Haven-1 / Haven-2)
Vast entered the CLD competition through an unfunded Space Act Agreement but has since become arguably the strongest contender. With over $1 billion in total investment, successful Haven Demo operations, and Haven-1 in integration, Vast has the most advanced hardware of any competitor. The company's independence from government funding during early development gave it speed advantages.
Axiom Space (Axiom Station)
Axiom's ISS-first approach provides a unique transition pathway. By attaching commercial modules to the existing station before separating, Axiom can maintain continuous operations during the transition period. The company has operational revenue from private astronaut missions and strong NASA relationships from years of ISS-related work.
Starlab (Voyager Space + Airbus + Northrop Grumman)
Starlab passed its Preliminary Design Review in March 2025 — a significant technical milestone. The partnership combines American space operations experience with European manufacturing capabilities. Northrop Grumman's Cygnus cargo vehicle provides a proven resupply solution.
Blue Origin (Orbital Reef)
While Blue Origin has deep financial resources from Jeff Bezos, the Orbital Reef concept has received less public attention than competing efforts. The company's successful New Glenn launch in early 2025 demonstrated increasing launch capability, but the station program's status relative to competitors remains less clear.
Evaluation Criteria
NASA will evaluate Phase 2 proposals across several dimensions:
- Technical approach and risk reduction demonstrated
- Business case and non-NASA revenue potential
- Schedule credibility and manufacturing readiness
- Safety architecture and crew health provisions
- International cooperation opportunities
- Workforce development and domestic manufacturing
- Cost to NASA for services over the contract period
[QUOTE]We don't want to be in the space station business anymore. We want to be a customer.
— NASA Administrator[/QUOTE]
The Broader Implications
The CLD program represents more than just a procurement exercise. It signals a fundamental shift in how the United States approaches space infrastructure. The transition from government-owned-and-operated to commercially-provided space stations has several profound implications:
- Cost reduction through competition and commercial incentives
- Innovation acceleration as companies compete for non-NASA customers
- Risk distribution across multiple commercial providers
- International partnership evolution as allies seek commercial station access
- Market creation for microgravity research, manufacturing, and tourism
The commercial space station market is projected to reach $37 billion by 2035, with NASA representing only a fraction of total demand. Pharmaceutical research, advanced materials development, space tourism, media production, and national security applications are expected to drive the majority of revenue.
What to Watch
The mid-2026 Phase 2 award is the next major milestone. Key questions to monitor include whether NASA will select one provider or maintain competition among multiple companies, how funding will be distributed between technical development and operational demonstrations, what role international partners like ESA, JAXA, and CSA will play in commercial station utilization, and whether Congressional appropriations will match NASA's stated ambitions for the CLD program.
The answers will shape humanity's presence in low Earth orbit for the next generation.
[FAQ]
Q: When will the ISS be decommissioned?
A: The ISS is scheduled for controlled deorbit in the early 2030s. SpaceX has been contracted to build the deorbit vehicle. The exact date depends on the station's structural health and the readiness of commercial replacements.
Q: How much is NASA spending on commercial space stations?
A: NASA awarded $416 million in Phase 1 and is expected to award $1-1.5 billion in Phase 2 contracts. Additionally, Axiom Space received a separate $140 million contract for ISS-attached modules.
Q: Will NASA astronauts use commercial space stations?
A: Yes. NASA plans to transition from owning and operating the ISS to purchasing crew time and research capabilities on commercial stations — similar to how it purchases crew transportation from SpaceX today.
Q: Could the ISS retirement be delayed?
A: It's possible. If commercial stations aren't ready, NASA could extend ISS operations, though the station's aging structure makes indefinite extension increasingly risky and expensive.
[/FAQ]