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AI Market Analysis8 min read
Anthropic Enterprise AI Market Share 2026: 73% of New Enterprise Spending
Ramp data shows Anthropic has overtaken OpenAI in enterprise AI market share among first-time enterprise buyers in 2026, prompting a strategic overhaul at OpenAI.
The Numbers: A Dramatic Reversal
Anthropic now captures over 73% of all spending among companies purchasing AI tools for the first time, according to Ramp's March 2026 AI Index — a dramatic reversal from a 50/50 split with OpenAI just ten weeks ago in January, and from a 60/40 advantage in OpenAI's favour as recently as early December 2025.
The data, authored by Ramp economist Ara Kharazian and corroborated by Axios reporting, paints a picture of accelerating momentum. The key figures:
• 73%+ of first-time enterprise AI spending now goes to Anthropic
• 47.6% of companies have adopted AI tools — a record high
• 24.4% of businesses now pay for Anthropic, up from roughly 4% a year ago
• 4.9% month-over-month growth for Anthropic in February — its largest monthly gain since tracking began
• -1.5% month-over-month decline for OpenAI — the steepest single-month drop recorded for any AI model company
"Anthropic now wins about 70% of head-to-head matchups against OpenAI among businesses purchasing AI services for the first time," Kharazian wrote. "It's a complete reversal of the trends we observed in 2025, when OpenAI adoption accelerated faster than any other model company."
As at March 20, 2026, these figures represent the latest available enterprise AI adoption data.
Revenue: OpenAI Leads, Anthropic Accelerates
OpenAI remains the larger company by revenue — on pace to generate approximately $25 billion in annualised revenue in 2026, versus Anthropic's $19 billion. But the growth trajectories tell a different story.
Anthropic's annualised revenue has roughly doubled since the end of 2025, when it was reported at approximately $9–10 billion. OpenAI's revenue growth, while still strong in absolute terms, has slowed in relative terms as Anthropic captures a growing share of new enterprise customers.
The enterprise composition of each company's revenue is also starkly different:
• Anthropic: ~80% of revenue comes from enterprise customers
• OpenAI: ~40% of revenue comes from enterprise customers
These figures, shared by both companies at Davos earlier in 2026, explain why the enterprise spending shift matters disproportionately to OpenAI. Losing enterprise market share hits closer to Anthropic's core strength and OpenAI's growth engine simultaneously.
OpenAI's Strategic Overhaul
The competitive pressure has triggered what The Wall Street Journal described as a major strategy shift inside OpenAI. In a company-wide meeting reported on March 16, 2026, Fidji Simo — OpenAI's CEO of applications — told employees the company needs to stop spreading its resources across too many product lines.
"We cannot miss this moment because we are distracted by side quests," Simo said, according to remarks reviewed by the Journal. "We really have to nail productivity in general and particularly productivity on the business front."
CEO Sam Altman and chief research officer Mark Chen are evaluating which initiatives to scale back, with employees expected to learn specifics in the coming weeks. OpenAI launched a string of products in 2025 — the Sora video generator, the Atlas web browser, and a hardware project with former Apple designer Jony Ive — that current and former employees told the Journal left the organisation stretched thin and lacking strategic direction.
Simo described Anthropic's rise as a "wake-up call" and said OpenAI is "very much acting as if it's a code red."
Why Anthropic Is Winning: Focus Over Features
Ramp's analysis suggests Anthropic's gains are not purely about product performance. Claude Code and OpenAI's Codex are roughly comparable coding tools — with Codex arguably cheaper and competitive on benchmarks — yet Anthropic cannot meet its own demand, with usage limits still in place across every plan.
Kharazian argued the preference may reflect something closer to brand identity than traditional enterprise procurement logic. Several factors appear to be driving the shift:
• Strategic focus — Anthropic has deliberately avoided branching into audio, image, and video generation, instead zeroing in on coding and enterprise use cases
• Enterprise-first positioning — With 80% of revenue from enterprise customers, Anthropic's product decisions, pricing, and support are oriented around business needs
• Safety narrative — Anthropic's positioning as the "responsible AI" company resonates with enterprise buyers who face governance and compliance requirements
• Developer experience — Claude Code, Claude's coding agent, has become a dominant tool in software development workflows, creating a strong pull-through effect for enterprise adoption
The focused strategy now appears to be paying off. While OpenAI invested in consumer-facing features like video generation and web browsing, Anthropic doubled down on the capabilities that enterprise buyers actually pay for — coding assistance, document analysis, and workflow automation.
What This Means for Businesses Choosing AI Tools
For businesses evaluating AI tools in 2026, the Ramp data offers several practical takeaways:
1. The market is no longer a one-horse race
The days of defaulting to ChatGPT are over. Nearly a quarter of businesses now pay for Anthropic, and the momentum strongly favours Claude for enterprise use cases. Any AI procurement decision should evaluate both platforms seriously.
2. Enterprise features matter more than consumer hype
Anthropic's lead in enterprise spending came despite having fewer product lines, no image generation, and persistent usage caps. Businesses are choosing based on core utility — coding, analysis, and workflow integration — rather than feature count.
3. OpenAI's refocus may benefit business customers
OpenAI's announced pivot back to "nailing productivity on the business front" could result in improved enterprise features, better pricing, and more focused support. Competition benefits buyers.
4. Adoption is accelerating industry-wide
With 47.6% of companies now using AI tools — up from roughly 30% a year ago — AI adoption is becoming table stakes rather than a competitive advantage. Businesses that haven't started evaluating AI tools risk falling behind.
For Singapore SMEs, the trend is clear: AI is no longer experimental technology. The question is which platform best fits your specific workflows, compliance requirements, and growth trajectory.
Sources & Further Reading
This article draws on the following sources, all accessed as at March 20, 2026:
• Ramp AI Index — March 2026
• Axios — Anthropic overtakes OpenAI in enterprise AI spending
• Wall Street Journal — OpenAI plans strategic overhaul amid Anthropic's rise
• CNBC — Anthropic captures 73% of new enterprise AI spending
Note: Revenue figures ($25B for OpenAI, $19B for Anthropic) are annualised run-rate estimates based on company disclosures and investor reports. Ramp data reflects spending patterns across Ramp's customer base of over 30,000 businesses and may not be fully representative of the broader market.
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