How Concentrated Is Anthropic's Customer Revenue?

Alex Kantrowitz says no single Anthropic customer now represents more than 10% of revenue, after two customers made up 25% in the last version of the numbers. For the nine months ended September 30, 2026, about 79% of revenue came from customers outside the top five for the three months ended that date. About 48% of total revenue still comes through the Amazon, Google, and Microsoft marketplaces. He reads those marketplace sales as a diverse base of customers, even though Anthropic relies heavily on the hyperscalers, and two of the three have invested in Anthropic.

Dan Primack calls that a real diversification, and the long tail this business needs. Being the foundation of business and of society takes everybody, or close to everybody, using Anthropic. The hyperscaler concentration does not surprise him.