Claude has had a remarkable few months, and it’s showing in its traffic data.
New data from SimilarWeb reveals that claude.ai drew roughly 1.08 billion visits in Q1 2026, up from approximately 230 million in Q1 2025 — a jump of nearly 5x year-over-year. For context, that puts Claude firmly in the same conversation as the most-trafficked AI products in the world, a position that would have seemed audacious even 18 months ago.
The Numbers Tell a Story
The SimilarWeb chart is stark: a modest bar for Q1 2025, then a bar that dwarfs it for Q1 2026. The growth is not a gradual climb — it reflects a company that has been firing on virtually every cylinder at once: new models, record funding, an enterprise land-grab, and, paradoxically, a very public fight with the US government that seems to have helped more than hurt.
The Models That Moved the Needle
A significant share of Claude’s traffic surge traces back to its product cadence. Anthropic has shipped relentlessly. Claude Code, the company’s agentic coding platform, launched publicly in May 2025 and has since become one of the fastest-growing developer tools in history, crossing $2.5 billion in annualized revenue by February 2026 — a figure that more than doubled since the start of the year. An estimated 4% of all public GitHub commits are now authored by Claude Code.
Beyond coding, Anthropic has kept up a relentless release schedule. Claude Sonnet 4.5, launched in mid-2025, was widely regarded as the best coding model available at the time. Opus 4.6, released in February 2026, introduced 1M-token context windows and native multi-agent collaboration — capabilities that opened up categories of enterprise work previously out of reach for AI. Sonnet 4.6 followed shortly after, with developers preferring it over previous Opus generations in coding evaluations. Cowork, a desktop tool extending Claude’s reach to non-technical users, shipped in January 2026. The pace has been relentless.
The Pentagon Standoff — and the Backlash That Backfired
Perhaps the most dramatic chapter in Anthropic’s recent history has nothing to do with a model release. In late February 2026, Anthropic refused to allow the Pentagon to use Claude for mass domestic surveillance of American citizens and to power fully autonomous weapons systems. The Department of Defense — rebranded the “Department of War” under a Trump executive order — responded by designating Anthropic a “supply chain risk”, a classification historically reserved for foreign adversaries. President Trump ordered federal agencies to immediately stop using Anthropic’s products.
The move was unprecedented. It was also, from a commercial standpoint, a misfire. Claude shot to the #1 spot on Apple’s App Store in the days following the ban. Enterprise customers didn’t flinch — Ramp data showed Anthropic’s share of paying US businesses jumping 6.3 percentage points in a single month, the largest gain on record. A federal judge in San Francisco later temporarily blocked the administration’s enforcement of the ban. The saga, still playing out in courts, has reinforced Anthropic’s brand among enterprise buyers as the AI company willing to hold a line.
Record Revenue, Record Valuation
The traffic growth is a leading indicator for what Anthropic’s financials have confirmed. In February 2026, Anthropic raised $30 billion at a $380 billion post-money valuation — the second-largest private technology funding round ever, behind only OpenAI’s $40 billion raise. Revenue has scaled at a pace with few historical precedents: from $1 billion annualized in December 2024, to $4 billion by mid-2025, to $9 billion by year-end, to $14 billion at the time of the Series G close, to over $30 billion in run-rate revenue as of early April 2026, per Bloomberg.
The enterprise story is equally striking. The number of customers spending over $1 million annually on Claude has grown from a dozen two years ago to over 500 today. Eight of the Fortune 10 are now Claude customers. Anthropic monetizes at roughly $211 per monthly user versus OpenAI’s approximately $25 per weekly user — an 8x gap in revenue efficiency that reflects just how deeply Claude has embedded itself in high-value enterprise workflows.
Closing In on OpenAI
The competitive picture is shifting. Ramp data — which tracks payments across more than 50,000 US businesses — shows Anthropic at 30.6% business adoption versus OpenAI’s 35.2%, a gap that has narrowed from 11 points as recently as February 2026. At the current trajectory, Ramp’s economists project Anthropic will surpass OpenAI in US business customer count within two months. In sectors where AI adoption is most mature — software, finance, professional services — Anthropic already leads.
Menlo Ventures data shows Anthropic holding a 40% share of the enterprise LLM API market versus OpenAI’s 27%. Among VC-backed companies, where AI adoption runs at 80%, Anthropic already leads OpenAI as the preferred vendor.
What Comes Next
Anthropic is reportedly eyeing a public listing as early as October 2026, with Goldman Sachs, JPMorgan, and Morgan Stanley in early conversations. Bankers expect the offering could raise more than $60 billion. The company is also targeting $26 billion in revenue by end of 2026 — a number that, given the current run-rate, no longer looks as improbable as it did when first floated.
The SimilarWeb traffic chart is a clean visual of a more complex story: a company that built the right product at the right time, held its ground when it mattered, and is now running at a scale that few in the industry anticipated this quickly. Whether the Pentagon dispute resolves, whether the IPO materialises, whether Claude 5 raises the bar again — the trajectory, for now, points in one direction.