The Thruster Math Nobody has Run
Options for Satellite Manufacturers are Limited and Getting Smaller as Demand Grows
What This Means
The satellite propulsion market is growing at 16.6% annually — a number that sounds reassuring until you map the actual supplier base. Fewer than a dozen manufacturers can deliver radiation-tested, LEO-qualified thrusters at the scale a 16,900-satellite pipeline demands, and the open-market supplier pool is actively shrinking as constellation operators acquire propulsion companies for internal use. Supply-chain leaders who have not validated secondary sourcing options for every thruster category in their program are carrying a single-source risk they probably haven’t named on any risk register — and the 2028 Golden Dome demonstration deadline is about to make that problem measurably worse.
Who Makes the Thrusters for 16,900 Satellites
Sixteen thousand nine hundred satellites. That’s the Novaspace forecast for small satellite launches through 2035 — a number The Journal of Space Commerce reported on April 29, confirmed by Analysys Mason’s March 2026 projection of 36,528 constellation satellites launching between now and 2034. Pick whichever figure you prefer. Both require a propulsion supply chain that does not currently exist at the scale they imply.
The satellite propulsion market is growing, no question. Research and Markets pegged it at $5.93 billion in 2025, projecting a jump to $6.92 billion in 2026 on a 16.6% compound annual growth rate (CAGR), with a path to $12.22 billion by 2030. That’s a market that looks, by the numbers, like it’s scaling to meet demand. The problem with aggregate market figures is that they tell you nothing about the supplier concentration at the specific sub-tiers that matter — the handful of manufacturers capable of delivering radiation-tested, flight-heritage thrusters qualified for low Earth orbit (LEO) radiation environments, on the production schedules that constellation integrators are now locked into.
The supply side of this equation is thinner than the market growth charts suggest. And it’s getting thinner.
The Signal: Two Numbers Moving in the Wrong Direction
In April 2026, Muon Space acquired Starlight Engines. The Journal of Space Commerce covered the move as a supply chain consolidation signal: Muon Space’s acquisition of Starlight Engines removes an independent propulsion supplier from the open market at the same moment that constellation-scale production demand is reaching program-of-record levels.
This is the pattern to watch. When constellation operators acquire propulsion suppliers rather than sourcing from them, they are making a rational institutional decision — vertical integration hedges their own supply risk. But for every other constellation integrator in the market, each acquisition narrows the open-market supplier pool. The buyer solved their problem. Everyone else’s problem got worse.
