What You’ll Find Here
I remember sitting in a coffee shop last year when a friend who works at a venture fund asked me: “If you had to pick one private company to bet your life savings on, OpenAI or SpaceX?” I laughed, but then I realized it’s not an easy call. Both are rockstars in the private market, and their valuations keep hitting new highs. But which one is actually worth more? And more importantly—should you care about the number? Let’s break it down.
The Background: Two Giants, Different Plays
First, let’s get the basics straight. OpenAI is the company behind ChatGPT, GPT-4, and a ton of generative AI breakthroughs. It started as a non-profit but switched to a “capped-profit” model, raising billions from Microsoft. SpaceX, on the other hand, is Elon Musk’s space baby—it launches rockets, builds Starlink, and dreams of Mars. Both are privately held, which means their valuations are based on secondary market trades and funding rounds, not stock prices.
In recent months, rumors swirled that OpenAI could be valued at around $80 billion to $90 billion after a potential tender offer. Meanwhile, SpaceX has been hovering around $150 billion to $180 billion in private transactions. On paper, SpaceX seems to be worth almost double. But wait—valuation isn’t just about a number. It’s about future cash flows, market size, and investor appetite.
Valuation Numbers: What the Market Says
Let’s look at the cold hard estimates. I’ve compiled data from secondary market platforms and recent funding reports (sources like Forge Global and PitchBook).
| Company | Latest Estimated Valuation | Primary Business | Key Investor |
|---|---|---|---|
| OpenAI | $80B – $90B | Generative AI, LLMs, ChatGPT | Microsoft |
| SpaceX | $150B – $180B | Space launch, Starlink, Starship | Founders Fund, a16z |
SpaceX clearly leads in pure valuation. But here’s the catch: valuation multiples are wildly different. SpaceX is valued at roughly 10–12x its projected 2024 revenue (around $13 billion). OpenAI? It might be at 40–50x projected revenue (around $2 billion). That’s a huge premium. Which one is overvalued? It depends on who you ask.
Revenue & Growth: Cash Flow vs Hype
One thing I’ve noticed from talking to analysts is that SpaceX actually has a profitable business line. Starlink alone is bringing in billions and is EBITDA positive. Launch services are reliable. OpenAI, meanwhile, is burning cash. Sure, ChatGPT has massive adoption, but the compute costs are astronomical. I’ve heard estimates that OpenAI spends over $700,000 per day just to run inference. That’s insane.
Let’s compare revenue streams side by side:
| Revenue Source | OpenAI | SpaceX |
|---|---|---|
| Core product | ChatGPT subscriptions ($20/mo), API usage | Launch contracts (Falcon 9, Starship), Starlink subscriptions |
| Estimated 2024 Revenue | ~$2B (mostly from API & subs) | ~$13B (Starlink ~$6B, launch ~$7B) |
| Profitability | Heavily negative (R&D + compute) | Approaching breakeven or slight positive |
| Growth rate | Soaring (>100% YoY) | Solid (Starlink growing ~50% YoY) |
SpaceX wins on revenue and profitability. But growth? OpenAI is growing faster in percentage terms. If you believe AI will eat the world, you might value a dollar of future revenue today more than a dollar from SpaceX. That’s the bet.
Tech Moat: AI Models vs Reusable Rockets
Now let’s talk about something that doesn’t show up on a balance sheet: competitive advantage. I’ve spent time with both ecosystems—well, as much as an outsider can. SpaceX’s moat is physical. You can’t easily copy a reusable rocket. The engineering complexity, supply chain, and launch licenses take decades to build. Blue Origin is trying, but it’s hard.
OpenAI’s moat is less clear. Sure, GPT-4 is impressive, but competitors like Meta’s Llama, Google’s Gemini, and open-source models are catching up fast. I worry that OpenAI’s lead might shrink if the model becomes a commodity. Unless they build a massive ecosystem (like an app store for AI agents), the moat is narrow. I’ve seen it happen to other tech darlings.
My personal take: I’d give SpaceX a stronger moat, but OpenAI a bigger addressable market. Space is a trillion-dollar opportunity, but AI might be a ten-trillion-dollar one. Moats can be built with data and distribution, but it’s not a sure thing.
Investor Perspective: Which One Wins?
I reached out to a friend who manages a fund that has invested in both companies (on secondary markets). He told me off the record: “SpaceX feels safer; OpenAI feels sexier. But safety rarely pays 10x.” He also mentioned that the secondary market for OpenAI is thinner—fewer shares trade, so the price might be inflated by demand from retail investors who want a piece of the AI narrative.
For an individual investor looking to buy shares via platforms like EquityZen or Forge, here are some practical points:
- Liquidity: SpaceX shares are easier to trade; OpenAI shares are rarer.
- Valuation floor: SpaceX has hard assets (rockets, satellites); OpenAI has intangible IP.
- Exit timeline: Both may go public in 2-5 years, but SpaceX has more pressure from Starlink to show profitability.
If you forced me to choose today, I’d say SpaceX is worth more in absolute terms, but OpenAI has higher upside per dollar invested. But that’s just my opinion—don’t take it as financial advice.
Risks & Uncertainties: What Could Go Wrong
Every high-growth company has landmines. Let’s list some:
- OpenAI risks: Competitors catching up (Meta, Google, Anthropic); regulatory backlash on AI safety; high burn rate forcing a down round; Microsoft might in-source its own models.
- SpaceX risks: Starship explosion or delays; Starlink saturation; geopolitical issues with launch sites; Elon Musk’s management style causing talent flight.
From my own experience watching private markets, the biggest risk for OpenAI is valuation disconnect. If revenue doesn’t grow fast enough to justify the multiple, the next funding round might be flat or down. SpaceX has more tangible assets to back its value.
