Ramp Data Shows Anthropic's Rapid Business Adoption as OpenAI Growth Stalls

New data from Ramp, a corporate spend management platform, reveals a significant shift in AI tool adoption among US businesses. Anthropic's tools saw a dramatic increase in March, with 30.6% of US businesses paying for their services, up from 24.4% in February. This surge represents a nearly 6 percentage point month-over-month growth, signaling strong momentum for the company's offerings.

In contrast, OpenAI's US business adoption remained nearly flat month-over-month at approximately 35%. This stagnation comes despite OpenAI's dominant position in the AI market and its earlier head start with ChatGPT and enterprise offerings.

What's Driving Anthropic's Growth?

The data suggests several factors contributing to Anthropic's rapid adoption:

Claude Code Product Line: Ramp's analysis specifically points to strong interest in Anthropic's Claude Code products as a key driver. This indicates businesses are increasingly valuing Claude's coding capabilities and developer-focused tools.

Enterprise Trust: As businesses become more sophisticated in their AI evaluations, Anthropic's emphasis on safety and reliability may be resonating with enterprise buyers who prioritize these factors.

Competitive Differentiation: Anthropic's approach to AI development, including its Constitutional AI framework, may be appealing to organizations with specific compliance or ethical requirements.

Market Implications

This divergence in adoption rates has several implications for the AI market:

Market Maturation: The data suggests the AI market is maturing beyond OpenAI's early dominance. Businesses are exploring alternatives and finding value in competing solutions.

Competitive Landscape: Anthropic's growth trajectory indicates it's successfully positioning itself as a viable alternative to OpenAI, particularly in enterprise contexts.

Product Strategy Validation: The strong interest in Claude Code validates Anthropic's strategy of developing specialized AI tools for specific use cases rather than relying solely on general-purpose models.

Counter-Perspectives

However, several factors warrant consideration:

Market Share Context: While Anthropic's growth is impressive, OpenAI still maintains a larger overall business adoption base at 35% versus Anthropic's 30.6%.

Ramp Data Limitations: The data represents only businesses using Ramp's platform, which may not be fully representative of the broader market.

OpenAI's Broader Strategy: OpenAI's flat growth in business adoption doesn't necessarily reflect weakness in other areas, such as consumer adoption or international markets.

Industry Response

The data comes amid broader industry developments. Anthropic recently released its Mythos model, which has attracted interest from major financial institutions. Sources indicate Goldman Sachs, Citigroup, and other banks are testing Mythos internally, with JPMorgan Chase being the only bank named in Project Glasswing.

Meanwhile, OpenAI continues to expand its enterprise offerings and recently addressed a security incident involving a compromised GitHub workflow used to sign its macOS apps.

Looking Forward

The acceleration of Anthropic's business adoption suggests the AI market is becoming increasingly competitive. As more businesses experiment with and deploy AI tools, the differentiation between providers may become more pronounced.

For Anthropic, maintaining this growth trajectory will require continued innovation and addressing enterprise needs. For OpenAI, the flat growth in business adoption may prompt strategic reassessments to maintain its market position.

The coming months will be critical in determining whether Anthropic's growth represents a temporary surge or the beginning of a sustained challenge to OpenAI's dominance in the enterprise AI market.