For all the attention on OpenAI‘s ChatGPT and Alphabet Inc‘s (NASDAQ:GOOGL) (NASDAQ:GOOG) Google Gemini, one of the fastest-moving stories in generative AI may belong to a much smaller player.
Anthropic‘s Claude has quietly increased its share of global generative AI website traffic from 1.6% a year ago to 9.2% in June 2026, according to new data from Similarweb. That’s a gain of nearly 500%, allowing Claude to leapfrog rivals like Grok, DeepSeek, Microsoft Corp‘s (NASDAQ:MSFT) Copilot and Perplexity in the race for user attention.
Claude Is Winning The Battle Below The Top Two
The AI traffic leaderboard still belongs to ChatGPT, which held a commanding 52.7% share in June despite slipping from 76.4% a year earlier. Google’s Gemini has emerged as the clear No. 2, climbing from 9.1% to 27.8% over the same period.
But the real surprise sits just below them.
Claude’s traffic share has nearly doubled in just the past three months, rising from 8.0% in March to 9.2% in June. That rapid growth has widened its lead over competitors including DeepSeek (3.6%), Grok (2.5%), Microsoft Copilot (2.0%) and Perplexity (1.1%).
For investors, the data suggests the AI market is becoming more concentrated—not around one winner, but around three.
Read Also: Anthropic's Claude Is Growing 9 Times Faster Than ChatGPT. So Why Isn't OpenAI Losing?
The AI Race Is Becoming A Two-Tier Market
The traffic trends point to an increasingly clear divide.
At the top sit ChatGPT and Gemini, together accounting for more than 80% of global generative AI website traffic. Behind them, Claude appears to be separating itself from the rest of the pack, while several smaller rivals have either stalled or lost share over the past year.
That doesn’t necessarily translate directly into revenue or enterprise adoption. Companies like Anthropic generate a growing portion of their business through APIs and enterprise partnerships rather than consumer web traffic alone. Still, Similarweb’s data offers one of the clearest snapshots of where users are spending their time.
The Next Metric Investors Should Watch
Traffic share alone won’t determine the winners of the AI race.
The bigger question is whether Anthropic can convert that growing audience into lasting competitive advantages through subscriptions, enterprise customers and developer adoption. The company has already attracted backing from Amazon.com, Inc. (NASDAQ:AMZN) and Alphabet, but sustained user growth could strengthen its position as businesses decide which AI models to build around.
If ChatGPT remains the category leader and Gemini continues closing the gap, Claude is making a compelling case that the AI race is no longer just a two-horse contest—and investors may want to pay closer attention to the fast-growing No. 3.
Read Also: Meta Just Undercut OpenAI and Anthropic by 75%: JPMorgan Says It's More Than a Price Cut
Photo Courtesy: miss.cabul on Shutterstock.com
