When Your Supplier Is Also a Competitor: Anthropic and Its Cloud Partners

Anthropic’s draft prospectus, as the Wall Street Journal described it, says Amazon, Google and Microsoft would not supply all the capacity it wanted and increasingly see it as a rival. What that tension looks like, and the questions it raises for founders who rely on a competitor.

Anthropic has told prospective investors that its biggest cloud suppliers have held back some of the computing capacity it requested, and that they increasingly treat it as a rival, The Wall Street Journal reported on October 20 from the company’s draft IPO prospectus. Amazon Web Services, Google and Microsoft supply most of Anthropic’s capacity. Amazon and Microsoft have also invested in it, and Reuters counts Google and Amazon among its AI competitors. It is the supplier competitor problem at a scale few founders will ever face, but the shape of it is familiar to any startup built on a platform it does not control.

Where it stands: Anthropic has kept the S-1 confidential so far and offered no comment for the WSJ story. The partner details below come from that report, from Reuters, and from the partners’ own announcements.

What the draft prospectus reportedly says

The core passage is short. Per the Journal, the company’s requests went beyond what “those partners were willing to provide,” and the same partners increasingly regard it as a competitor. A summary by StockTwits, also citing the Journal, added that the shortfall was “leading to individual compute spends and third-party commitments that are pushing costs higher.”

Earlier, on September 30, Reuters quoted Anthropic on the wider risk. Leaning on a short list of partners and vendors, in Anthropic’s phrasing, “creates complex dynamics that could give rise to conflicts of interest and adversely affect our access to compute.”

Neither report says how much capacity was requested, how much was refused, or which partner held back. Those details may appear when the document is filed publicly.

Three roles at once: investor, supplier, rival

Reuters summed up the arrangement with Google and Amazon as firms that “are simultaneously investors, suppliers of computing power and important distribution partners, as well as AI competitors.” The partners’ own announcements fill in each relationship.

Partner As investor As supplier
Amazon Minority stake; up to $4 billion by early 2024 Primary cloud and training partner; $110 billion committed, per WSJ
Google Not covered in the sources cited here Up to 1 million TPUs; $111 billion committed, per WSJ
Microsoft Up to $5 billion $30 billion of Azure capacity at signing; $31 billion, per WSJ

Amazon’s 2024 posts describe an investment “for a minority ownership position” and say Anthropic named AWS “its primary training partner, in addition to continuing to be its primary cloud provider.” Google’s release on the TPU expansion quoted Google Cloud chief Thomas Kurian crediting “the strong price-performance and efficiency its teams have seen with TPUs for several years.” Microsoft’s announcement paired Anthropic’s commitment “to purchase $30 billion of Azure compute capacity” with Microsoft’s own pledge to invest up to $5 billion, alongside up to $10 billion from Nvidia.

Each relationship is announced as a partnership, and each is also a dependency. The reports from Reuters and the Journal put the tension between those roles into Anthropic’s own words.

The commitments run one way

The other half of the picture is what Anthropic owes. The Journal reported that it plans to spend $111 billion on Google cloud contracts, $110 billion with AWS and $31 billion on Microsoft, “regardless of actual usage.” Across all its cloud agreements, the paper said, Anthropic is on the hook for about $450 billion over the next seven to ten years, and “The bulk of these deals are noncancelable.”

Put next to the capacity complaint, that creates an asymmetry worth noticing. The reports describe firm spending obligations on Anthropic’s side. They do not describe matching obligations on the suppliers’ side to provide whatever extra capacity Anthropic wants. Whether the contracts contain such terms is not public. Our piece on non-cancellable compute commitments explains how these obligations are recorded and disclosed.

Spreading the dependence

Anthropic has not relied on a single cloud. Its capacity comes from at least three hyperscalers, and the Journal counted as much as $86 billion more owed to two smaller Nvidia-based clouds, Nscale and Lambda, “in addition to other cloud deals.” That is multi-sourcing on a very large scale, and the draft still describes a shortage.

The lesson for smaller companies is less about the size and more about the pattern. Splitting work across providers lowers the leverage any one of them holds, but only if the product can actually move. A model, database or pipeline tuned to one vendor’s chips, APIs or managed services can be costly to shift. Amazon’s own announcement said Anthropic’s future foundation models would be built and served on Amazon’s Trainium and Inferentia silicon: deep integration of that kind brings performance gains and makes a switch harder at the same time.

For founders choosing a first cloud, our comparison of AWS, Azure and Google Cloud covers the basics, and our look at how cloud commitments can limit switching covers the lock-in side.

The supplier competitor checklist: terms founders tend to read closely

None of what follows is drawn from Anthropic’s contracts, which are not public. It is a list of contract areas that become important when a supplier also competes, framed as the questions a founder or CFO typically works through with counsel:

  • Capacity. Is supply guaranteed, reserved, or best-efforts? What happens if the provider cannot or will not deliver more?
  • Allocation in a shortage. Does the contract say how scarce capacity is shared between customers, including the provider’s own products?
  • Use of customer data. What may the provider see, log or learn from your workloads and usage patterns?
  • Commitment shape. Is spending fixed regardless of usage, and can unused amounts roll forward or be reduced?
  • Exit. Notice periods, data export, and any fees or minimums that survive termination.
  • Investor rights. If the supplier also holds equity, what information and approval rights come with the stake?

The same thinking applies on the revenue side. A startup whose largest customer is also a potential rival faces a mirror image of this risk, which our article on customer concentration covers.

Anthropic’s case shows how far the overlap can go. Amazon, according to its own 2024 post, invested for a minority stake, supplies chips Anthropic said it would train on, and is named as its primary cloud provider, while Reuters lists it among Anthropic’s AI competitors.

Frequently Asked Questions

What does it mean when a supplier is also a competitor?

A company depends on another firm for something it cannot easily replace, such as cloud capacity, while that same firm sells a rival product to the same customers. The supplier then has its own reasons to decide how much to provide and on what terms.

Which of Anthropic’s partners are also its competitors?

Reuters described Google and Amazon as backers, chip and cloud vendors, sales channels and rivals all at once. In the WSJ’s reading, the draft prospectus says Amazon Web Services, Google and Microsoft increasingly see Anthropic as a competitor.

Did Anthropic’s cloud partners limit its capacity?

As the Journal described the draft, Anthropic said it sought more capacity than those partners were willing to provide. The reports do not say how much was requested or refused.

How much has Anthropic committed to its cloud partners?

The Journal reported $111 billion with Google, $110 billion with Amazon Web Services and $31 billion with Microsoft, owed regardless of actual usage, within about $450 billion of cloud agreements over the next seven to ten years.

How do startups reduce dependence on one supplier?

Common approaches include running on more than one provider, keeping the product portable between them, and negotiating written terms on capacity, data use and exit. Which of these fits depends on the business and its contracts.

Sources

This article is general information for founders and is not accounting, legal or investment advice. How a financing instrument is accounted for depends on its exact terms; work through it with your accountant or auditor. Anthropic has not published its IPO prospectus; figures are as reported by the sources cited on the dates shown.