"counter the speed, manoeuvrability, and lethality of the threats," the Space Force said — and on that rationale it has handed out prototype contracts to jump‑start a controversial new layer of U.S. missile defence.
Eleven firms, up to $3.2 billion in prototype work
The United States Space Force announced awards to eleven companies to develop space‑based interceptors under the Space‑Based Interceptor (SBI) program, in agreements worth up to $3.2 billion. Named primes include Raytheon, General Dynamics, Lockheed Martin and Northrop Grumman, alongside newer entrants such as Anduril and True Anomaly Inc, a company the report describes as focused exclusively on space defence.
Other Transaction Authority used to pull in startups and primes
The Space Force used Other Transaction Authority (OTA) agreements for the awards. According to the reporting, OTAs permit prototype research and development outside standard federal acquisition rules, giving the government flexibility to select providers without being locked into a single contractor. Bryon McClain, program head and USSF Colonel, said OTAs allow the Space Force to bring in both traditional and non‑traditional vendors to take advantage of more innovation‑focused startups.
The SBI program’s origin inside the Golden Dome of America effort
The Space‑Based Interceptor program was established last year as part of the Golden Dome of America program. The Golden Dome initiative, the report says, stems from one of President Trump's first Executive Orders after his 2025 inauguration, which called for a system to defend the U.S. against ballistic, hypersonic, and cruise missiles, as well as "other advanced aerial attacks." The Space Force framed the SBI work as a necessary complement to existing missile defence systems, coupled with next‑generation space‑based tracking and AI‑enabled interceptors.
The service justified the push by saying AI‑enabled interceptors are required to "counter the speed, manoeuvrability, and lethality of the threats." The Space Force also cautioned that further details of the SBI program would be withheld because of "operational security requirements."
Cost and capability context: UCS estimate and the existing GMD baseline
The awards arrive against a backdrop of scepticism and expensive precedents. The Union of Concerned Scientists estimated in a cited PDF that an effective space‑based interceptor network would require "hundreds to several thousand orbiting interceptors" and would cost at least $300 billion — roughly ten times the price of ground‑based alternatives, the report notes. The Register's earlier coverage is summarized with sceptical headlines such as "Orbital datacentres are a pie‑in‑the‑sky idea: Gartner" and comparisons to past high‑profile programmes.
The report also places SBI alongside America's current Ground‑Based Midcourse Defence (GMD) system: 40 interceptor rockets in Alaska and four in California, established at a cost of around $350 billion and costing about $4 billion a year to operate. The GMD reportedly works 57 percent of the time in tests, according to the same account. The article recalls President Reagen's Strategic Defense Initiative (SDI) in the 1980s, which similarly aimed to protect the United States against ballistic nuclear missiles and was largely abandoned after the collapse of the Soviet Union.
What this means for traditional primes, startups, and taxpayers
- Traditional primes (Raytheon, Lockheed Martin, Northrop Grumman, General Dynamics): The OTA awards create opportunities to convert prototype work into larger programs of record, leveraging existing experience with missile‑interceptor design and integration — but they also place primes in direct competition with newer firms on a program framed as requiring rapid innovation.
- Startups and non‑traditional vendors (Anduril, True Anomaly Inc): OTAs explicitly open a pathway for younger firms to apply novel approaches and AI‑centric designs to space interceptors; the Space Force signalled an intent to draw on these companies' innovation potential.
- Taxpayers and policymakers: The UCS estimate and the historical costs of the GMD system underline the scale and budgetary questions tied to SBI. The awards accelerate technical work, but the cited cost comparisons — $300 billion for a large interceptor network versus decades of existing ground‑based spending — will shape oversight and debate as prototypes advance.
The Space Force has moved from policy directive to contracting action, combining established defence primes with newer space‑defence specialists under flexible OTA agreements. What remains plainly visible in the public record is a tension between the service's stated operational need — AI‑enabled interceptors to meet high‑speed threats — and the scale and cost concerns raised by independent estimates and past programs. With many technical and budgetary details withheld for operational security, the next concrete markers to watch will be what prototypes emerge from the eleven teams, how performance compares to the GMD baseline, and whether projected numbers of orbiting interceptors track toward the hundreds‑to‑thousands range that the Union of Concerned Scientists estimated.
Original story: The Register — "Trump's Golden Dome gets $3.2BN of contractors and an AI sprinkle"
