Sourcery with Molly O'Shea · Oct 31, 2026 · 1h 10m · 62m saved
With Philip Johnston, CEO and Co-Founder of Starcloud · Ezra Feilden, Co-Founder and CTO of Starcloud · Adi Oltean, Co-Founder and Chief Engineer of Starcloud
Photo via starcloud.com
Starcloud went from founding to a satellite in orbit carrying an Nvidia H100 in 21 months. Philip Johnston, CEO and co-founder of Starcloud, told Sourcery with Molly O'Shea that the company's case for putting data centers in space rests on one number: the cost of launching a kilogram.
Running a data center on solar power on Earth means paying for land permits, battery storage and solar cells. In orbit none of those apply, which leaves launch as the cost that decides whether the model works.
"If the launch cost gets below around $500 a kilo, then it will be much cheaper to do this in space than terrestrially." — Philip Johnston
Philip runs a 30-person company that has raised $450 million, including a $250 million round led by Manhattan West with Nvidia, Cisco Investments, Benchmark and EQT. He showed Molly around its factory with co-founders Ezra Feilden and Adi Oltean.
The full episode is covered here so you can skip it. 1 hour 10 minutes of audio, 8 minutes of reading.
Here are the 9 takeaways that matter.
Key Takeaways
Launch below about $500 a kilo makes data centers cheaper in orbit than on Earth, Philip says
Falcon 9 costs roughly $5,000 a kilo today
Starcloud built its first satellite for about $2.5M, against a $75M-$100M quote from an aerospace prime
A 10-20% higher chip failure rate in orbit would break the economics, a bigger risk than cooling
Starcloud has filed for a constellation of 88,000 satellites, which Philip calls just the first tranche
A satellite is harder to attack than a data center on the ground, Philip argues
Philip says SpaceX is going to buy Tesla, and calls it a fact, not a hot take
1. 21 Months to Orbit
Molly O'Shea, who hosts Sourcery, toured Starcloud's headquarters near Redmond, Washington, with Philip, through the vibration-test area, the fabrication shop and a campus expansion about to open. Starcloud 1 reached orbit 21 months after the company was founded, carrying the first Nvidia H100 flown in space. Philip said the previous record was four years.
Starcloud chose Redmond because most satellites by mass are built there
"90% of all satellites launched in the last few years by mass were designed, built and tested in Redmond, Washington, which is exactly where we are now." — Philip Johnston
Starcloud 2 launches in January with 100 times the compute of Starcloud 1 and large radiators that unfold in orbit. Starcloud 3 is designed to fit through Starship's "Pez dispenser" door.
"It's around two tons fully loaded, 235 kW, and we can deploy up to 50 of them per Starship launch." — Philip Johnston
