James Chavez
SpaceX vs. Nvidia is suddenly a real question for AI investors, now that Elon Musk's rocket company trades publicly under the ticker SPCX. It's an odd pairing on the surface, but SpaceX owns xAI, the maker of the Grok chatbot and the X social platform, which folds it squarely into the AI conversation.
At a Glance
- SpaceX (NASDAQ: SPCX) now houses xAI after acquiring Musk's AI venture earlier this year.
- The combined AI division pulled in $3.2 billion in 2025 revenue, growing 22%, with X ad revenue making up about half.
- Nvidia's most recent quarter showed 85% year-over-year revenue growth, with analysts modeling 96% for the current quarter.
- Nvidia carries a roughly $5 trillion market cap; SpaceX closed Monday near $2 trillion.
- On AI strength and valuation, Nvidia takes the edge two rounds to one.
How the two AI businesses stack up
xAI landed inside SpaceX through a chain of deals most casual observers probably lost track of. Musk bought Twitter, renamed it X, then sold X to xAI, and after a further merger that whole bundle ended up under SpaceX. The result: a rocket maker now owns a social network. Advertising dollars from X account for roughly half of the $3.2 billion the AI unit generated last year. A 22% growth rate is respectable, but it's hardly the kind of acceleration that makes an AI bull sit up straight.
Nvidia is operating on a different plane. The chipmaker's latest quarter delivered 85% revenue growth from a year earlier, and Wall Street expects the current quarter to come in around 96%. Almost all of that comes from selling GPUs into data centers chasing AI capacity. Put the two side by side and Nvidia's AI engine is plainly larger, faster, and more central to its identity.
Round one: Nvidia.
One company is far more than its AI label
Calling SpaceX an AI company misses most of what it does. Rockets and space ambitions get the headlines, but its biggest and most profitable engine is connectivity, driven largely by the Starlink satellite internet service. That diversification matters. If the AI buildout cools off or disappoints, SpaceX has other revenue streams to lean on.
Nvidia isn't a one-trick operation either. It sells into gaming, manufacturing, and autonomous driving. Still, the overwhelming share of its money flows from AI-related demand. Should spending patterns shift hard, SpaceX would be better positioned to absorb the blow. That versatility hands it a clear win here.
Round two: SpaceX.
The valuation gap is hard to ignore
This is where the comparison gets uncomfortable for SpaceX shareholders. Nvidia's market cap sits near $5 trillion, about 2.5 times SpaceX's roughly $2 trillion. If both were priced sensibly, their fundamentals should track somewhere close to that ratio. They don't.
Over the trailing 12 months, Nvidia booked more than $250 billion in revenue and around $160 billion in net income. To justify a price tag at 40% of Nvidia's, SpaceX would need something like $100 billion in revenue and roughly $64 billion in profit.
| Metric | Nvidia (TTM) | SpaceX (2025) |
|---|---|---|
| Market cap | ~$5 trillion | ~$2 trillion |
| Revenue | $250+ billion | Under $20 billion |
| Net income / EBITDA | ~$160 billion net income | $6.6 billion adjusted EBITDA |
The reality lands nowhere near that. SpaceX reported less than $20 billion in 2025 revenue. Net income wasn't disclosed, but adjusted EBITDA came to $6.6 billion. Those figures don't support a $2 trillion valuation in any conventional sense, which suggests the stock is riding more on excitement than on results. Stories built mostly on hype tend not to age well, though SpaceX could prove an exception given Musk's track record.
Round three: Nvidia.
Frequently Asked Questions
How did SpaceX end up owning an AI company?
SpaceX acquired xAI, the business behind Grok and the X social platform, earlier this year before going public. Musk had previously sold X to xAI, and a later merger placed the entire group under the SpaceX umbrella.
Why does X matter to SpaceX's AI revenue?
Advertising revenue from the X social platform accounts for roughly half of the $3.2 billion the SpaceX AI division generated in 2025.
Is SpaceX cheaper than Nvidia?
No. Despite a market cap roughly 40% of Nvidia's, SpaceX produces a tiny fraction of Nvidia's revenue and profit, making it look richly valued relative to its fundamentals.
Where this leaves investors
SpaceX brings genuine breadth and an exciting story, and its connectivity business gives it staying power beyond AI. But on the two measures that count most for an AI-focused buyer right now, Nvidia's far stronger AI engine and more grounded valuation carry the day, two rounds to one.
