AI summary
- SpaceX's AI revenue sits in a division the company now calls SI. It hit $7.56 billion in the third quarter and overtook Starlink for the first time.
- It means more than a rename because SI is now the label on a business segment that investors and analysts follow every quarter.
- The reporting on the SpaceX numbers still says AI revenue, though, and people search for the words they actually use.
- Most .si names are speculation and the aftermarket is small, so if you can get the .com at a fair price, that's usually the better buy.
- A .si only makes sense for a plain generic phrase that people search for, when the .com and .ai of the same words are taken or expensive.
What SpaceX reported
SpaceX's third-quarter numbers came out this week, and one line stands out if you're following the move from "AI" to "SI". finance.biggo reports that AI revenue, which sits inside a division SpaceX now calls "SI" for superintelligence, reached $7.56 billion. That's more than nine times the figure a year earlier, and it's enough to overtake Starlink for the first time.
The segment also swung to an operating profit of $431 million, up from a $1.26 billion loss the quarter before. Total revenue was $14.58 billion, up 161%, and the company posted its first quarterly profit since going public in June: $4.4 billion.
Musk told investors that demand for rented computing power is far bigger than supply. In his words: "We could rent out our compute several times over if we said yes to everyone." SpaceX also disclosed a long-term infrastructure contract worth $1.11 billion a month, starting on 1 December, with an unnamed large customer. It expects $33 billion to $37 billion of revenue in the current quarter.
One caution. The report relies on investor Peter Diamandis, who holds a stake in SpaceX and went through the results on his podcast. I'd keep that in mind as you read the detail.
Why this matters more than a rename
I've already written about Musk renaming SpaceXAI to SpaceXSI. Changing a name costs very little. A reported business segment worth billions is a different matter. Once "SI" is the label on a division that earns more than Starlink, the term isn't only a political slogan any more. Analysts, investors and journalists have to type it every quarter.
On the same podcast, physicist Alexander Wissner-Gross said xAI later folded its way into SpaceX to form the SI division. So the SI label sits on top of what used to be an AI company. I'd expect to see that pattern again: the same business with a new word on it.
Musk isn't the only one. On Thursday the US Treasury proposed a rule on outbound investment, and The Asahi Shimbun reported that it used Trump's favoured term for AI, "superintelligence" or SI. New Scientist also recalls that last month Trump issued an executive order saying the technology would no longer be known as "artificial". He then wrote that his administration considers anyone who uses "artificial intelligence" rather than "super intelligence" as "THE ENEMY".
The catch: most writers still say AI
Read the coverage closely, though. The finance.biggo piece that names the SI division still talks about "AI revenue" and says "SpaceX's AI business grew 830% in a single year". Asahi's own copy says "artificial intelligence" and only notes that Treasury used SI. The New Scientist columnist still describes the debate between "AI doomers vs AI accelerationists".
That gap matters for domains. People search for the words they use, and right now most of them still say AI. Nobody types a .si name into a browser out of habit the way they type a .com. Don't assume one company's label will change that quickly.
What it means for .si names
The SpaceX story is about renting out compute, building power supply and moving money. Musk said the main limit is no longer chips but power, cooling and physical infrastructure, and SpaceX and Tesla are each building factories that can produce 100 gigawatts of solar panels a year. That's a story about markets and project finance. It isn't about clever brand names.
So the useful .si names aren't ones that copy SpaceX or anyone else's brand. Don't register anything with SpaceX, Starlink or Musk in it. Those are someone else's brands and you'd be asking for trouble. The names worth a look are plain generic words for what's going on in this story: selling compute and models, financing power projects, and what all of it means for people.
Names from my inventory that fit
- aimarket.si, $4,500. The .com is listed at $594,888 and the .ai at $47,995, and the phrase gets 12,100 searches a month. If companies now rent out compute and models, that market needs a plain name.
- bankability.si, $2,500. Lenders, solar developers and project-finance teams use this word, and it has the highest US cost per click in my portfolio at $15.26. The .ai is listed at $49,800, the .com has been parked since 2002, and it gets 6,600 searches a month.
- greatmind.si, $2,000. The .com asks $500,000 and the .ai is for sale with the price on request. It gets 33,100 searches a month and would suit a reasoning model, a tutor or a mentor.
- futurehuman.si, $1,500. The .ai asks $290,000, the .com has been held since 1999, and it gets 5,400 searches a month. Diamandis ended the podcast debate with "Humans are the bottleneck for sure." This name is about that same question.
None of these is a sure thing. I've priced them against what the .com and .ai versions cost, not against any proven history of .si resales.
Should you buy a .si name because of this?
Not because of SpaceX alone. A big company putting "SI" on a division is real evidence that the term is spreading into business reporting, but the basics haven't changed. Most .si names are speculation, and very few of them get resold. If you can get the .com of your name at a fair price, that's the better buy for most businesses.
A .si makes sense only if you can answer yes to all three of these questions:
- Are the .com and .ai taken or expensive? If either one is available at a sensible price, buy that instead.
- Is it a generic name and not a brand? Plain dictionary words are fine. Copying SpaceX, Starlink or any other company's name isn't.
- Do people search for it? Check the monthly searches. A name nobody types won't help you, whatever the extension.
If a name passes all three, a .si can be a sensible, cheaper option. If it fails any of them, I'd keep your money. You can see the full list at aidomains.si.
Names from this store that pass the test
Questions
How much did SpaceX's SI division make?
AI revenue in the division SpaceX calls SI reached $7.56 billion in the third quarter, more than nine times the figure a year earlier. It overtook Starlink for the first time and swung to an operating profit of $431 million.
Has the press switched from AI to SI?
Not yet. The coverage of the SpaceX numbers still talks about AI revenue, and The Asahi Shimbun noted that the US Treasury used Trump's favoured term, "superintelligence" or SI, in its proposed rule while its own copy said artificial intelligence.
Should I register a .si name with SpaceX or Starlink in it?
No. Those are another company's brands. Stick to plain generic words whose .com and .ai are taken or expensive.
Which .si names fit this story?
From my inventory, aimarket.si ($4,500), bankability.si ($2,500), greatmind.si ($2,000) and futurehuman.si ($1,500) fit the themes of compute markets, project finance and what SI means for people.
Sources
- finance.biggo, 2026-10-23
- The Asahi Shimbun, 2026-10-23
- New Scientist, 2026-10-20
This post was researched and drafted with AI help from the sources above, then checked by me before publishing. Facts are as reported on the dates shown.