Private space stations are no longer a concept for the distant future. They are actively being designed, built, and tested by commercial companies across the United States. With the International Space Station scheduled for decommissioning in the early 2030s, the future of human activity in low Earth orbit now depends on whether these commercial space stations can be ready in time to prevent a gap in America’s crewed presence above the planet.
This transition represents one of the most significant shifts in the history of human spaceflight, moving from a single government-operated platform to a competitive marketplace of commercially owned and operated destinations in orbit. NASA has made clear that it does not intend to build an ISS replacement. Instead, the agency plans to become a customer, purchasing services from private operators rather than managing its own facility.
For those tracking this transition closely, the International Space Development Conference (ISDC) 2026 offers a rare opportunity to engage directly with the researchers, engineers, policymakers, and commercial leaders working to make it happen.
Why the ISS Is Being Retired and What Comes Next
The ISS has hosted nearly 300 people from 26 countries since its first crew arrived in November 2000. It remains one of the most complex engineering achievements in history. However, the station is aging. Structural concerns, including a persistent leak in the Russian Zvezda module, have raised questions about how long the facility can safely operate.
NASA and its international partners have agreed to continue operations through at least 2030. A United States Deorbit Vehicle is being developed to safely guide the station out of orbit at the end of its operational life. The question is no longer whether the ISS will retire. It is whether what comes next will be ready in time.
NASA’s Commercial LEO Destinations Program: From Operator to Customer
Through the Commercial Low Earth Orbit Destinations (CLD) program, NASA is funding and supporting private companies to develop space stations that can serve government, commercial, and international customers. The model follows the same approach NASA used successfully with cargo and crew transportation to the ISS through programs like Commercial Resupply Services and Commercial Crew.
In Phase 1, NASA awarded Space Act Agreements and contracts to several companies to mature their station designs. Phase 2, which is expected to provide between one billion and 1.5 billion dollars in funding through 2031, will support continued development and initial crewed demonstrations. As of early 2026, NASA has placed the formal Phase 2 acquisition on hold while aligning the program with updated national space policy, though the agency has signaled continued commitment to the effort.
The approach reflects a fundamental change in how the United States manages its presence in orbit, one that prioritizes commercial viability and shared investment over sole government ownership.
Who Is Building Commercial Space Stations to Replace the ISS
Several companies are actively developing commercial space stations, each with a distinct approach and timeline.
Vast is building Haven-1, a single-module station designed to host crews of four astronauts for missions lasting up to thirty days. Originally targeting a 2026 launch, the company updated its timeline in early 2026 and now expects Haven-1 to be ready for launch no earlier than the first quarter of 2027 aboard a SpaceX Falcon 9. If successful, it would be the first standalone commercial space station in orbit. Vast has also outlined plans for Haven-2, a larger multi-module station designed to support up to twelve crew members, with a first module targeted for 2028 and full assembly expected by the early 2030s.
Axiom Space is taking a different path by initially attaching its first module to the ISS itself. The company’s Payload Power Thermal Module is expected to dock with the station, then later separate and join with a second Habitat module to form a free-flying station as early as 2028. Axiom has already flown four private astronaut missions to the ISS and was awarded a fifth in January 2026. Construction of the first module’s primary structures is underway with partner Thales Alenia Space.
Starlab Space, a joint venture between Voyager Space and Airbus with support from Northrop Grumman, is developing a station that includes a large habitat and laboratory module along with a service module for power and propulsion. The station is currently in the design phase and is targeting a launch around 2029.
Other concepts, including Blue Origin’s Orbital Reef program developed with Sierra Space, remain in various stages of planning and development.
What Private Space Stations Mean for Science and the Low Earth Orbit Economy
The shift to private stations has implications that extend well beyond replacing the ISS. Commercial operators are designing their platforms to support a wider range of activities, including microgravity research, pharmaceutical development, advanced materials manufacturing, Earth observation, and space tourism.
NASA has stated that it plans to continue supporting research in low Earth orbit after the ISS retires, with commercial stations expected to host ongoing scientific investigations. The agency also anticipates that private customers, from universities and biotech firms to international space agencies, will drive much of the demand for orbital facilities.
The economic model behind commercial space stations assumes that falling launch costs, particularly through reusable launch vehicles, will make orbital access practical for a broader range of users than the ISS ever served.
The Geopolitical Stakes of a Space Station Gap
The United States is not operating in a vacuum. China’s Tiangong space station has been continuously crewed since 2022, and Beijing has actively pursued international partnerships for research aboard the facility. A gap between the retirement of the ISS and the availability of commercial alternatives would leave the United States without a crewed presence in low Earth orbit for the first time in decades.
Congressional leaders have emphasized the national security implications of this timeline. Proposals to extend ISS operations beyond 2030 have been discussed as a safeguard, though the long-term solution remains the successful development and deployment of commercial stations.
Where the Conversation Continues: ISDC 2026
The transition from the ISS to commercial space stations touches every dimension of space development: technology, policy, economics, science, and international relations. These are precisely the themes that define the International Space Development Conference.
ISDC 2026, hosted by the National Space Society from June 4ā7 at the Hilton McLean Tysons Corner in McLean, Virginia, brings together the professionals, researchers, policymakers, and advocates who are actively shaping this future. The conference location, in the heart of the Washington, D.C. metropolitan area, places attendees near the federal agencies, aerospace organizations, and policy institutions driving these decisions.
Sessions at ISDC 2026 address commercial spaceflight, space settlement, orbital infrastructure, space policy, and emerging technologies, with speakers drawn from NASA, private industry, academia, and the international space community. The conference themes align closely with the National Space Society’s Roadmap to Space Settlement, which identifies the transition to commercial low Earth orbit operations as a critical milestone for humanity’s future beyond Earth.
For those looking to understand what comes after the ISS, and who wants to be part of building it, ISDC provides a forum that few other events can match.
š Explore the ISDC 2026 program and sessions
Frequently Asked Questions
What will replace the International Space Station?
NASA is supporting the development of multiple private space stations through its Commercial Low Earth Orbit Destinations program. Companies including Vast, Axiom Space, and Starlab Space are building stations designed to serve government, commercial, and international customers in orbit.
When will private space stations be operational?
Timelines vary by company. Vast is targeting a Q1 2027 launch for its Haven-1 station. Axiom Space plans to begin assembling its free-flying station as early as 2028. Starlab Space is targeting 2029. Full operational capability across multiple stations may take until the early 2030s.
Why is NASA not building a replacement for the ISS?
NASA has chosen to transition from owning and operating a space station to purchasing services from commercial providers. This approach is intended to reduce costs, encourage private investment, and allow NASA to focus its resources on deep-space exploration through the Artemis program.
Will there be a gap between the ISS and commercial stations?
This is one of the central concerns in the space community. While the ISS is expected to operate through at least 2030, most commercial stations are still in development. NASA, Congress, and industry leaders are working to minimize any gap in the United States’ crewed presence in low Earth orbit.
How does ISDC 2026 address the future of low Earth orbit?
ISDC 2026 features dedicated sessions on commercial spaceflight, orbital infrastructure, and space policy. The conference brings together professionals from NASA, private space companies, and international organizations to discuss the transition from the ISS to commercial space stations.
What is NASA’s Commercial LEO Destinations program?
The Commercial LEO Destinations (CLD) program is NASA’s public-private initiative to fund and support the development of commercially owned space stations in low Earth orbit. Through phased agreements, NASA provides funding and technical expertise while private companies design, build, and operate the stations. NASA plans to purchase services from these stations rather than build and operate its own ISS replacement.
Who is building commercial space stations right now?
As of 2026, the leading companies developing commercial space stations include Vast (Haven-1 and Haven-2), Axiom Space (Axiom Station), Starlab Space (a Voyager Space and Airbus joint venture), and Blue Origin with Sierra Space (Orbital Reef). Each company is pursuing a different design and timeline, with the earliest launches expected in 2027.