Space Stations Companies

Sierra Space

Louisville, United States commercial

Sierra Space is a commercial space company developing the Dream Chaser spaceplane, Orbital Reef commercial space station, and related space technologies. Spun off from Sierra Nevada Corporation in 2021, Sierra Space is based in Louisville, Colorado, and aims to build commercial infrastructure in low Earth orbit to support NASA, commercial, and international customers. Sierra Space operates as a privately held company backed by strategic investors including General Atlantic, Coatue, and Moore Strategic Ventures. The company employs approximately 1,500 people and is led by CEO Tom Vice. Sierra Space positions itself as a leader in the commercialization of low Earth orbit. ## History and Milestones Sierra Nevada Corporation's Space Systems group developed the Dream Chaser vehicle beginning in 2004, based on NASA's HL-20 lifting body design. The spacecraft competed for NASA's Commercial Crew Program but was not selected. Sierra Nevada pivoted to cargo delivery, winning a Commercial Resupply Services-2 contract in 2016. Sierra Space was established as a separate company in 2021 to focus on commercial space opportunities beyond government contracts. The spinoff attracted significant private investment, valuing the company at over $4.5 billion. In 2021, Sierra Space partnered with Blue Origin to propose Orbital Reef, a commercial space station selected by NASA's Commercial LEO Destinations program. This partnership positions Sierra Space as a potential successor to the International Space Station. ## Products and Services Dream Chaser is a reusable lifting-body spaceplane designed to deliver cargo to the International Space Station and future destinations. The vehicle launches atop a ULA Vulcan Centaur or Atlas V rocket and returns to Earth with a runway landing, enabling rapid payload recovery. Dream Chaser carries both pressurized and unpressurized cargo. The LIFE (Large Integrated Flexible Environment) habitat is Sierra Space's expandable space station module technology. LIFE modules launch compactly and inflate to provide large pressurized volume. This technology is central to Orbital Reef and could support lunar surface habitats. Sierra Space is developing Shooting Star, a cargo module that accompanies Dream Chaser, providing additional volume for supplies and waste disposal. The company also works on space station systems, life support, and related technologies. ## Technology and Capabilities Dream Chaser's lifting body design provides cross-range capability during reentry, enabling landing at multiple locations. The spacecraft is designed for gentle returns (1.5 g maximum), suitable for sensitive cargo including biological experiments. Dream Chaser can land on commercial runways at non-federal spaceports. LIFE habitat technology uses advanced materials to create expandable structures that provide more volume per launch than traditional rigid modules. Sierra Space has conducted full-scale burst tests demonstrating the technology's structural integrity and safety margins. The company develops life support, thermal control, and power systems for space habitats. Sierra Space also works on in-space manufacturing technologies, including plans for industrial facilities aboard Orbital Reef. ## Business and Financial Overview Sierra Space raised approximately $1.4 billion in private funding, including a 2021 Series A at a $4.5 billion valuation. The company generates revenue from NASA contracts, including the Commercial Resupply Services agreement for Dream Chaser cargo flights. Major contracts include NASA CRS-2 (at least six Dream Chaser cargo missions), Commercial LEO Destinations funding for Orbital Reef, and various technology development awards. The company seeks additional commercial and international customers for Dream Chaser and space station services. Sierra Space competes for astronaut and cargo transportation services while developing commercial space station offerings. The company's path to profitability depends on successful Dream Chaser operations and Orbital Reef development. ## Recent Developments In 2024, Sierra Space prepared for the first Dream Chaser mission, completing spacecraft integration and testing. The inaugural flight to the International Space Station was targeted for launch on ULA's Vulcan Centaur rocket. The company advanced Orbital Reef development, conducting system design reviews and component testing. Sierra Space also expanded its LIFE habitat program, completing additional structural tests and advancing manufacturing capabilities. Sierra Space strengthened international partnerships and explored additional commercial applications for its technologies. The company also invested in workforce development and facilities expansion to support upcoming operations. ## Market Position Sierra Space positions itself as a commercial space infrastructure provider, distinct from launch companies like SpaceX or satellite operators. The Dream Chaser and Orbital Reef represent comprehensive solutions for low Earth orbit commercialization. Key competitors include SpaceX (for cargo services and potentially stations), Axiom Space (for commercial space stations), and other companies developing LEO infrastructure. Sierra Space's reusable spaceplane technology offers unique capabilities for cargo return. Competitive advantages include the Dream Chaser's gentle return capability, expandable habitat technology, and diverse technology portfolio. Strategic partnerships with Blue Origin for Orbital Reef and ULA for launch services strengthen the company's position.

Voyager Space

Denver, United States commercial

Voyager Space is a space exploration company building the future of commercial space stations and in-space services through strategic acquisitions and partnerships. The company leads development of the Starlab commercial space station in collaboration with Airbus, creating infrastructure for post-ISS human spaceflight. In January 2024, Voyager Space and Airbus completed formation of Starlab Space LLC, a transatlantic joint venture to design, build, and operate the Starlab commercial space station. The team completed the station-level System Definition Review, a critical milestone assessing technical and programmatic accountability. Starlab features a large inflatable habitat built by Lockheed Martin, metallic docking node, power and propulsion element, robotic arm, and the George Washington Carver Science Park laboratory. NASA awarded the Voyager-led team a $160 million contract under the Commercial Low-Earth Orbit Development program. Starlab will continuously host up to four astronauts for research, science, and manufacturing, targeting initial operational capability by 2027. Northrop Grumman provides cargo transportation services for the station using Cygnus spacecraft. Voyager acquired Nanoracks, a pioneer in commercial space services that launched the Bishop Airlock to ISS in 2020, the first permanent commercial addition to the station. Nanoracks consolidated under the Voyager Space brand in 2024, bringing expertise in satellite deployment, ISS research, and space station operations. Voyager Space continues building a comprehensive commercial space ecosystem through strategic acquisitions and partnerships.

Axiom Space

Houston, United States commercial

Axiom Space is building the world's first commercial space station while conducting pioneering private astronaut missions to the International Space Station. Founded in 2016 by former ISS Program Manager Michael Suffredini and entrepreneur Kam Ghaffarian, Axiom is creating the infrastructure for humanity's transition to commercial space operations. In January 2024, Axiom Mission 3 (Ax-3) launched an all-European crew including astronauts from Turkey and Sweden to the ISS for 18 days, conducting 30 experiments during orbit. Axiom Mission 4 launched in June 2025 carrying the first astronauts from Poland and Hungary to stay aboard the station, commanded by veteran NASA astronaut Peggy Whitson. NASA awarded Axiom a $140 million contract to attach habitable commercial modules to the ISS before separating to form an independent station. The first Axiom module, Hab One, completed critical design review in 2024, with five modules manifested on the station assembly roadmap. The Payload Power Thermal Module is scheduled to launch no earlier than 2027, separating from ISS in 2028, followed by habitat and airlock modules creating a fully functional commercial station before ISS retirement in 2030. Axiom partners with Thales Alenia Space for module construction and SpaceX for crew transportation via Dragon spacecraft. The company broke ground on a major manufacturing facility at Houston Spaceport. Axiom Space continues advancing commercial space station development while providing private astronaut mission services connecting paying customers and international space agencies with ISS research opportunities.

Vast

Long Beach, United States commercial

Vast is an American commercial space station company founded in 2021 by billionaire Jed McCaleb (co-founder of Ripple and Stellar). The company acquired Launcher (rocket startup) in 2023 and is developing Haven-1, a single-module commercial space station whose launch on a SpaceX Falcon 9 is targeted for the first quarter of 2027 (Vast update, March 2026). Haven-1 would be the first commercial space station in orbit if launched as planned, hosting NASA, commercial, and private astronaut missions. Vast has a Launch Services Agreement with SpaceX and a NASA CLD (Commercial Low Earth Orbit Destination) study contract. The company is also developing Haven-2, a larger multi-module station intended to be operational when the ISS deorbits around 2030. Vast's business model centers on selling research time, tourism stays, and government crew transport slots. McCaleb has personally funded the company with hundreds of millions of dollars, giving Vast unusual financial runway for a space station startup.

Thales Alenia Space Gateway

Turin, Italy commercial

Thales Alenia Space Gateway, founded in 2019 and based in Turin, Italy, is a business unit of Thales Alenia Space focused on the development of critical infrastructure for future space exploration. The company’s core business centers around the design and construction of modules intended for space stations and lunar surface habitats. Specifically, current activities are focused on the Gateway module development program. While detailed technological specifics are not publicly available, the company leverages Thales Alenia Space’s extensive expertise in life support systems, robotic technologies, and pressurized module construction – capabilities crucial for sustaining human presence in deep space. This suggests a focus on advanced materials, reliable power generation, and closed-loop environmental control systems. As a dedicated unit within Thales Alenia Space, the company is directly involved in supporting international space programs. The Gateway module development signifies a key role in the NASA-led Artemis program, aiming to establish a sustainable human presence on the Moon and utilize lunar orbit as a staging ground for future missions to Mars. This positions Thales Alenia Space Gateway as a vital contributor to international collaboration in space exploration. Given the limited publicly available information, it is difficult to fully assess the company’s unique value proposition beyond its parent company’s established reputation. However, the focused approach on Gateway module development suggests a specialization in providing critical, high-reliability infrastructure for long-duration space missions, potentially offering a streamlined and dedicated resource for partner space agencies.

Gateway Spaceport is a United States-based company focused on the development of rotating space stations designed to simulate varying levels of gravity. Their core business centers around creating orbital infrastructure capable of replicating both lunar and Martian gravity environments. This unique capability positions them within the emerging market of in-space research and development, as well as space tourism. The company’s primary technological focus is on the engineering and construction of large-scale rotating structures in orbit. While specific details regarding construction methods or materials are not publicly available, the core concept relies on centrifugal force generated by rotation to create artificial gravity, addressing a significant challenge for long-duration space habitation and biological research. This allows for studies that are difficult or impossible to conduct on Earth or in traditional zero-gravity environments. Currently, Gateway Spaceport is building a community base to support their vision, indicating a pre-operational stage focused on development and outreach. No specific missions, customers, or completed projects are currently publicized. Gateway Spaceport differentiates itself by concentrating on artificial gravity as a key feature of its space station design. This specialization targets a niche within the broader space station market, potentially attracting research institutions and private companies seeking to conduct gravity-dependent experiments or prepare for long-duration missions to the Moon and Mars, as well as offering a novel experience for space tourists.

Genesis Engineering Solutions

Lanham, United States commercial

Genesis Engineering Solutions is an established space engineering firm founded in 1993 and based in Lanham, Maryland. The company provides comprehensive spaceflight solutions, encompassing the entire lifecycle from initial concept and design through fabrication, integration, and testing. Genesis Engineering positions itself as a full-service provider, supporting both government and commercial clients with a range of space-related projects. Currently, a key focus for Genesis Engineering is the development of single-person spacecraft specifically for the Orbital Reef project, a planned commercial space station. This indicates a capability in designing and building crewed spacecraft components, and potentially complete vehicles, tailored to specific station architectures. The company’s website highlights experience working with both NASA and the Department of Defense, suggesting a proven track record in meeting the rigorous requirements of these agencies. While specific project details beyond the Orbital Reef work are not readily available, Genesis Engineering emphasizes a commitment to client success and positions its work as a testament to its capabilities. This suggests a focus on delivering reliable, custom-engineered solutions. Given its long history and established client base, Genesis Engineering Solutions appears to be a mature player in the space infrastructure market, uniquely positioned to contribute to the emerging commercial space station economy with its expertise in single-person spacecraft development and end-to-end engineering services.

ILC Dover

Frederica, United States commercial

ILC Dover is a Frederica, Delaware manufacturer of flexible, fabric-based structures for aerospace and defense, with a space heritage spanning from the original Apollo lunar surface suits to modern commercial space station components. Founded in 1947 and spun off from International Latex Corporation (maker of Playtex products), ILC Dover won the NASA contract to manufacture the Apollo A7L pressure suit in the 1960s — the suit worn by every astronaut who walked on the Moon. The company subsequently produced the Extravehicular Mobility Unit (EMU) worn on Space Shuttle and ISS EVAs for over four decades. ILC Dover's core competency is in flexible pressure vessels and softgoods: the combination of pressure-tight bladders, restraint layers, and thermal/micrometeroid protection in sewn and bonded assemblies that can be folded for launch and deployed in space. Beyond suits, this expertise extends to inflatable spacecraft structures including TransHab-derived habitat modules, inflatable airlocks, and deployable decelerators. The company supplied softgoods for the Mars Pathfinder and Mars Exploration Rover airbag landing systems — the giant inflatable bubbles that cushioned rover landings. For Artemis, ILC Dover supplies components to Axiom Space's next-generation lunar suit (AxEMU) and is developing softgoods for inflatable airlock systems on future lunar Gateway stations. Their work on HALO and other Gateway modules positions them as a critical supplier for NASA's return-to-Moon architecture. ILC Dover also produces ballistic protection, pharmaceutical containment, and chemical-biological protective gear, diversifying revenue while sharing manufacturing processes.

NASA Marshall Space Flight Center

Huntsville, United States government

NASA’s Marshall Space Flight Center, established in 1960 and located in Huntsville, Alabama, serves as the agency’s lead center for propulsion systems and a key contributor to both launch vehicles and broader space systems development. With a workforce of over 6,000, Marshall has a storied history in rocketry, notably developing the Saturn V rockets that propelled the Apollo missions to the Moon. Currently, the center leads development of the Space Launch System (SLS), the powerful rocket designed for deep space exploration, including the Artemis program. Beyond launch systems, Marshall is responsible for significant contributions to space-based observatories, including the Chandra X-ray Observatory, and has played a role in the development of space stations, including Skylab and modules for the International Space Station. The center also actively fosters the next generation of engineers through programs like the Human Exploration Rover Challenge and the Student Launch challenge, engaging students in hands-on design, build, and launch activities. Marshall’s expertise extends to technology demonstration missions, continually advancing capabilities for future space endeavors.