Anthropic's S-1 Shows Enterprise Customers Buying Across Products
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Anthropic's filing for a public listing describes a strategy familiar from Amazon and Uber: start with one product, then sell more of the ecosystem to the same customer. The S-1, filed with the Securities and Exchange Commission on Monday, suggests the approach is working.
More than half of customers spending at least $100,000 a year now use both the Claude platform and a first-party app such as Claude Code or Cowork. At the end of last year, the share was about 30%.
The customer numbers
As of September 30, Anthropic counted more than 11,900 customers spending at least $100,000 a year, more than 1,900 spending at least $1 million, and about 250 spending $10 million or more. Net revenue retention was about 900% at the end of the third quarter.
The filing credits "significant usage expansion as customers realize the value of deploying Claude across their organizations." It says an advance at any of the model, developer-platform or application layers "compounds across all three layers."
App users spend far more. In the third quarter, the top 5% of Claude Enterprise customers who used Claude Code spent about 20 times as much per month as the average enterprise user who did not use it.
How Anthropic sells
A business can begin with the API, add Claude Code for its engineers, then Cowork for the wider workforce. Anthropic does not have to win a new buyer for each product.
It also invests in Applied AI teams that place Claude inside customers' technology stacks. The company recently launched a venture with Blackstone and other private equity firms, called Ode with Anthropic, to embed forward-deployed engineers in businesses.
Distribution runs through AWS, Google Cloud and Microsoft Azure under what the filing calls a "joint go-to-market approach." Anthropic holds the direct contract with customers and pays each cloud provider a fee. The filing says this lets it "avoid channel conflict" and "set pricing."
The company says it will put less effort than a typical business into "entrenching our current products and business models, and more effort to defining new ones." Revenue for the first half of 2026 was $16.3 billion, up from $1.2 billion in the same period a year earlier.
Risks the filing names
The cloud partners increasingly see Anthropic as a competitor. According to the filing, that could make it harder to secure the compute it needs, because Amazon, Google and Microsoft may put their own needs or those of rivals they have backed first.
The risk factors also warn that "a significant reduction in spending by, or the loss of, one or more of our largest customers" could hurt its business, financial condition and results of operations.
Source: Anthropic S-1 filing, SEC