Commercial space stations

State of the art (2026)

No commercial space station has yet flown crew. Vast Space leads on schedule: Haven-1 began launch assembly in January 2026 and targets Q1 2027 on a Falcon 9, having slipped from August 2025 and May 2026. Axiom, at NASA's request, reshuffled to launch its Payload, Power and Thermal Module first (no earlier than 2027), with Hab One no earlier than 2028. NASA's March 2026 Ignition restructure of Commercial LEO Destinations was the decisive signal: the agency now says no commercial LEO business case exists yet and will own a core docking module rather than fund whole stations. China's Tiangong remains the only continuously crewed alternative. Capital is abundant – Vast raised $500M and Sierra Space $550M in March 2026 – operational readiness is the gap.

No commercial station has flown crew; Haven-1 in Q1 2027 is the closest

Vast Space's Haven-1 is the closest commercial station to launch and slipped from August 2025 to May 2026 and then to Q1 2027 following primary-structure qualification testing. The first crewed mission (Vast-1) is planned as a four-astronaut 30-day stay on Crew Dragon. Until that flight, every commercial-LEO claim in the category is paper. The platform's read is that Q1 2027 is itself optimistic given the integration phases the company is still working through.

Axiom reshuffled at NASA's request; PPTM is the new lead module

Axiom Space's Hab One was originally the first module to fly, but NASA asked Axiom in 2024-2025 to launch the Payload, Power and Thermal Module (PPTM) first instead. PPTM is now targeted no earlier than 2027 to dock with the ISS and provide power and thermal capacity. Hab One is targeted no earlier than 2028, at which point PPTM separates and joins Hab One as an independent two-module station. The reshuffle is the operational signal that Axiom and NASA are managing toward gap risk, not toward a clean commercial handover.

NASA's March 2026 CLD restructure is the consensus-shift moment

NASA stated in March 2026 that it does not believe a commercial business case currently exists in LEO. The agency restructured Commercial LEO Destinations away from funding entire stations and toward buying a shared docking module that connects to the ISS. Private stations attach their modules to that core section and detach into free-flyers when ready. This is a downgrade of the original commercial-station thesis: NASA is paying for transition infrastructure, not for the commercial replacement.

March 2026 was the funding inflection – but not the operational one

Vast raised $300M Series A equity plus $200M debt the same week Sierra Space closed $550M Series C at $8B valuation under LuminArx Capital. The combined ~$1.05B confirms that capital is not the constraint on the category. Operational readiness is – Haven-1 is still pre-integration-complete, Sierra Space's LIFE habitat passed its second full-scale burst test in June 2025 but has no launched hardware, and Dream Chaser Tenacity's inaugural flight has been modified from ISS resupply to a free-flyer demonstration.

Tiangong is the only continuous-crew alternative beyond ISS – by design

China's three-module Tiangong has been continuously crewed since 2022 and is on a schedule to reach six modules and 198 tons by 2030 – exactly the year ISS retires. The cruciform expansion begins with a multifunctional module on Long March 5B at end of 2027, then two science modules in 2028 and 2029. The platform's read is that the Western commercial-station gap and the Chinese state-station expansion converge in 2030, and the national-security framing of the US commercial station thesis is the load-bearing demand driver, not commercial science.