Semiconductors / AI

🔥 Jim Keller's Tenstorrent Just Raised $1.5 Billion to Take On Nvidia With Open Chips

Jim Keller's Tenstorrent raised a $1.5B Series E at a $6.2B valuation to sell open, RISC-V AI chips as an alternative to Nvidia.

By Tech Arcade··5 min read

Jim Keller's Tenstorrent Just Raised $1.5 Billion to Take On Nvidia With Open Chips — Tech Arcade
Photo: Laura Ockel / Unsplash

Let’s get the number on the table first: $1.5 billion. That’s the size of the Series E that Tenstorrent — the AI-chip company run by processor designer Jim Keller — just closed (SiliconANGLE). It values the Toronto-based startup at $6.2 billion, more than double the $2.6 billion it was worth back in December 2024 (BetaKit).

The money is the headline. The pitch behind it is the story.

Tenstorrent doesn’t want to sell you a better GPU. It wants to sell you a different kind of machine entirely — one built on open, royalty-free RISC-V silicon, sold as anything from a single card to a full server rack, running software you’re allowed to pry open and rewrite. In a market where Nvidia carries the overwhelming majority of every AI accelerator shipped, that’s a long shot. But it’s a long shot with a very specific resume behind it.

Here’s the thesis: the $1.5 billion isn’t a bet that Tenstorrent beats Nvidia. It’s a bet that buyers want a second option they actually own.

🧠 Why This Matters

Right now, training and running large AI models mostly means renting Nvidia. The hardware is excellent, but the real lock-in is CUDA — the software layer that a decade of AI code is written against. Switching chips usually means rewriting that code, which is why so few buyers try.

That lock-in is exactly what Tenstorrent is attacking. Its whole design philosophy is open: open-source RISC-V processor cores, an open software stack, and chips you can buy at the size you need instead of in Nvidia-dictated bundles.

And then there’s Keller. This is the engineer who led the designs behind AMD’s Zen comeback, Apple’s early iPhone chips, and Tesla’s self-driving silicon, with a stop at Intel in between. When someone with that track record says the next chip giant will be built in the open, investors with names like Fidelity, ARK Invest, Morgan Stanley and T. Rowe Price write checks (unite.ai).

“The future of compute is open, scalable and owned by the people building on it.” — Jim Keller, CEO, Tenstorrent

📊 Deep Dive

The round was led by Trace Capital and Innovation X, with the funds earmarked for volume manufacturing and global commercial expansion (DataCenterDynamics). Tenstorrent sells its own hardware — Blackhole cards, TT-QuietBox workstations, and rack-scale Galaxy servers — and also licenses the underlying IP, its Ascalon CPU and Tensix cores, to chipmakers including Samsung and LG.

Here’s the split, in plain terms:

  • Architecture: Nvidia runs on proprietary CUDA; Tenstorrent builds on open-source RISC-V and a software stack anyone can modify.
  • What you buy: Nvidia sells GPUs; Tenstorrent sells one architecture at every size — a Blackhole card, a QuietBox workstation, or full Galaxy racks.
  • Business model: Nvidia sells silicon; Tenstorrent sells silicon and licenses its CPU and AI cores as IP to the likes of Samsung and LG.
  • This round: $1.5B Series E at $6.2B, up from roughly $693M and a $2.6B valuation in December 2024.
  • The backers: Trace Capital and Innovation X led; Fidelity, ARK, Morgan Stanley and T. Rowe Price joined earlier investors Samsung, LG, Hyundai Motor Group and Bezos Expeditions (TechCrunch).

The “one architecture, every size” line is the key commercial idea. As Keller put it: “We’ve built one architecture and we sell it at every size.” The same chip design scales from a workstation under a desk to a cluster in a data center — no separate product lines, no forced upgrades.

⚠️ The Catch

Now the cold water. $6.2 billion is a big valuation for a company whose revenue nobody is publishing. The “$150 million” figure floating around the last raise referred to closed deals investors were shown, not booked sales — a distinction worth holding onto.

CUDA is still the gravity well. An open software stack is lovely in principle, but Nvidia’s ecosystem has a decade of libraries, tutorials and trained engineers behind it, and Tenstorrent’s tooling is years younger. “Open” only wins if it’s also good enough to switch to.

Tenstorrent isn’t alone in the challenger lane, either. AMD, Groq, Cerebras and the in-house chips from Google, Amazon and Microsoft are all chasing the same “not just Nvidia” budget. And Nvidia isn’t standing still — its next-generation Rubin parts are already in the pipeline. Raising $1.5 billion buys Tenstorrent a seat at the table. It doesn’t buy the meal.

🎯 What Happens Next

The immediate job is manufacturing. Tenstorrent has said the money goes toward ramping Galaxy server production, funding RISC-V ecosystem research, and hiring globally. The number that will actually matter over the next year isn’t the valuation — it’s shipped units and named customers. Watch for a marquee data-center win and, eventually, a real revenue figure. Those are the signals that turn a promising architecture into a business.

🧩 Bigger Picture

Step back and this round is less about one company than about a pattern. AI buyers spent two years learning what it feels like to depend on a single supplier for the most expensive component in their stack. Now the money is flowing toward anything that offers a second door — open standards, on-premise deployment, chips you own outright rather than rent.

RISC-V is riding that same wave: a free, open instruction set that lets companies build custom silicon without paying a toll to a proprietary gatekeeper. Tenstorrent is the best-funded bet that open hardware can scale all the way up to frontier AI.

“Nvidia is not the only option anymore.” — Holger Mueller, Constellation Research

Whether that’s true is still an open question. But $1.5 billion says a lot of serious people are done assuming the answer is no.

If Nvidia spent the last two years selling the only game in town, Tenstorrent just raised $1.5 billion on the oldest bet in tech: that nobody stays the only game forever.

Sources

❓ Quick answers

How much did Tenstorrent raise and at what valuation?

Tenstorrent raised a $1.5 billion Series E at a $6.2 billion valuation, announced October 19, 2026, led by Trace Capital and Innovation X (SiliconANGLE).

Who runs Tenstorrent?

CEO Jim Keller, the processor designer behind AMD's Zen, Apple's early iPhone chips and Tesla's self-driving silicon, with a stint at Intel.

How is Tenstorrent different from Nvidia?

It builds on open-source RISC-V and an open software stack rather than Nvidia's proprietary CUDA, sells one architecture from a single card to full racks, and also licenses its CPU and AI cores as IP.