AI Search Engine Statistics 2026: Market Share Data

AI Search Market Share in 2026

No public dataset measures how many searches go to AI assistants rather than to search engines. What can be measured is narrower: which assistants send people to websites, which assistant websites people visit, and what people say they use. StatCounter counts page views referred to the websites that run its tracker. In September 2026, ChatGPT sent 80.47% of the page views referred by AI chatbots worldwide, Gemini 10.94%, Perplexity 5.84%, Copilot 1.78% and Claude 0.95%.

Visits to the assistants themselves tell a different story. Similarweb’s panel puts ChatGPT at about 53% of visits to generative AI websites in May 2026, down from about 76% in June 2025, with Gemini at 27–28%. ChatGPT still dominates the traffic AI assistants send out, while Gemini has taken a much larger share of the visits people make to AI tools.

AI Assistants Against Traditional Search

Put next to search engines, AI assistants are still small senders of traffic. StatCounter’s comparison of the two largest gives ChatGPT 0.39% of the combined page views referred by Google and ChatGPT in September 2026, a share that has moved between 0.22% and 0.41% since April 2025 without a clear trend. Google itself referred 89.94% of search-engine page views worldwide.

The US government’s public analytics give a second, independent view. Across federal websites over the 30 days to October 20, 2026, ChatGPT sent 1.61% of all visits, the fourth-largest source after direct visits, Google and Bing, and more than Yahoo and DuckDuckGo combined. For the search engines themselves, see our search engine market share report.

ChatGPT Search

OpenAI reports people, not searches. On October 21, 2026 it said more than 1.2 billion people use ChatGPT each week, up from more than 700 million at the end of July 2025. It has not published how many of those people use search, only that search usage “nearly tripled” in the year to March 2026. ChatGPT can choose when to answer from the web, so a search count would not map neatly onto Google’s queries anyway.

The clearest view of what people use ChatGPT for comes from an NBER working paper by OpenAI’s economic research team and Harvard economist David Deming. In a sample of consumer conversations, “Seeking Information”, the use closest to search, grew from 14% of messages in July 2024 to 24% in July 2025. Advertising followed in 2026: OpenAI says ChatGPT Ads reached a $1 billion annual run rate in under 200 days.

Perplexity

Perplexity, an AI answer engine built around web search, publishes few usage figures of its own. In StatCounter’s data its share of AI chatbot referrals has roughly halved, from 12.07% in April 2025 to 5.84% in September 2026, while Gemini’s share grew. Relative to how much it crawls, Perplexity sends more visitors back than other AI platforms: Cloudflare measured the lowest crawl-to-refer ratio of the major AI platforms for Perplexity in 2025.

Cloudflare also reported in August 2025 that Perplexity used an undeclared crawler to reach sites that had blocked its declared bots, and removed it from its verified-bot list. Perplexity disputed the finding the same day, saying Cloudflare had confused its traffic with unrelated requests from a third-party browser service. The one detailed usage study, by Harvard and Perplexity researchers, covers the agent in Perplexity’s Comet browser rather than search itself.

Google AI Mode and AI Overviews

By Google’s own monthly counts, its AI features in Search reach users in the billions. AI Overviews, the AI summaries at the top of results, had more than 2 billion monthly users by July 2025. AI Mode, the separate conversational search launched in the US on May 20, 2025, passed one billion monthly users a year later. Each disclosure uses a different measure (monthly users, daily active users, US and India only), so the series is not one continuous line.

Google says these features add queries rather than replace them: AI Overviews drove more than 10% more queries for the query types that show them, and AI Mode queries are three times longer than traditional searches, with nearly one in six made by voice or image (more on that in our voice search statistics). Pew found AI summaries on 18% of Google searches in March 2025, more often on longer and question-style searches. For the ranking changes that came with them, see our Google algorithm update history.

Clicks When AI Answers Appear

The best independent evidence on clicks comes from Pew Research Center, which tracked the browsing of 900 US adults in March 2025. When a Google results page showed an AI summary, people clicked a traditional result on 8% of visits, against 15% without one, and clicked a link inside the summary on 1%. Ahrefs, analysing its own keyword and Search Console data, found the top result’s click-through rate 34.5% lower on keywords with an AI Overview in 2025, and 58% lower when it repeated the study with December 2025 data.

Google’s position is that total organic clicks from Search have been relatively stable, with traffic shifting between sites. Publisher data points the other way: Chartbeat figures quoted by the Reuters Institute show Google organic traffic to more than 2,500 news and publisher sites down 33% between November 2024 and November 2025. The two can both be true if some sites lose traffic while others gain, which is how Google itself describes the shift. More detail is in our zero-click search statistics.

AI Referral Traffic by Industry

AI referrals are small but growing quickly. Similarweb estimates that AI platforms sent 770.7 million visits a month to websites between June 2025 and May 2026, more than double the year before, and that every industry it tracks at least doubled. Marketplaces received the most AI referral visits, followed by news and travel. Beauty (+312.5%) and fashion (+278.2%) grew fastest from small bases, while marketplaces still grew 237.3% from the largest base.

These are panel estimates of referred visits, and Similarweb notes that visits arriving without referrer data are counted as direct traffic, so the figures are a floor. They show where AI referrals are growing, not how much organic traffic any industry has lost. Planning content for both channels is the work of our content engine service.

Microsoft Copilot and Bing

Microsoft does not report Copilot search queries or Bing’s market share. It reports users and revenue growth: its first-party Copilots passed 150 million monthly active users in October 2025, and in April 2026 Microsoft said Bing had reached 1 billion monthly active users for the first time. Search advertising revenue, excluding traffic acquisition costs, grew 10% in the quarter to June 2026.

In referral data, Copilot is a small and shrinking source: 1.78% of AI chatbot referrals worldwide in September 2026, down from 4.04% a year earlier, though 6.69% in the US, and only 0.33% on mobile devices worldwide. Microsoft’s own analysis of 37.5 million Copilot conversations found that searching for information remained the most common use in 2025.

Citation Patterns and Answer Accuracy

Which sites AI answers cite is still poorly measured in public data. The most rigorous published look is Pew’s: in March 2025, Wikipedia, YouTube and Reddit made up 15% of the sources listed in Google’s AI summaries, about the same as in standard results, while .gov sites appeared three times as often. Citation rates in ChatGPT are low but rising: Similarweb estimates that 6.8% of US ChatGPT answers carried a citation in May 2026, against about 1.6% in June 2025.

Accuracy matters as much as frequency. In a Tow Center test of eight AI search tools, more than 60% of answers misidentified the news article they were asked about, and a study coordinated by the European Broadcasting Union found significant issues in 45% of AI assistants’ answers to news questions. For the evidence behind common AI search optimisation advice, see our AI search and SEO statistics.

AI Crawlers and Crawl-to-Refer Ratios

AI answers that cite the web depend on crawlers, the assistant’s own or a search provider’s. Cloudflare’s 2025 data shows how lopsided the exchange is: AI bots made 4.2% of requests for HTML pages across its network, while the platforms behind them referred few visitors back. Anthropic’s crawlers requested up to 500,000 pages for each page view referred from its platforms, OpenAI’s up to 3,700, while Google’s ratio stayed between 3:1 and 30:1.

Of the crawling purposes Cloudflare tracks, the fastest-growing is the visit an assistant makes while answering a user, up more than 21 times during 2025. Which bots to allow is now a business decision; our AI crawler access guide sets out the trade-offs.

What the Platforms Say About Being Cited

The platforms’ own documentation is more modest than most optimisation advice. Google says there are no additional requirements to appear in AI Overviews or AI Mode, and no special files or schema: a page has to be indexed and eligible for a snippet. OpenAI says a site must allow its OAI-SearchBot crawler to appear in ChatGPT search answers. Bing now shows site owners how often Copilot cites their pages, though not how many people click.

None of the platforms promises that a page will be cited. Claude added web search in 2025 as well, so the same basics apply across assistants: crawlable pages, clear answers and content that other sources reference.

Who Uses AI Search

Surveys show how far use has spread. In Pew’s February 2026 survey, 49% of US adults said they use an AI chatbot and 42% said they use one to search for information, the most common use Pew asked about. ChatGPT led at 44%, ahead of Gemini at 24% and Copilot at 17%. Six in ten said they read the AI summaries at the top of search results.

News is a smaller use. Across 48 markets, the Reuters Institute found 10% of people using AI chatbots for news each week in 2026, up from 7%, and 16% among under-35s.

Forecasts to Read With Care

Forecasts about AI search have aged unevenly. Gartner predicted in February 2024 that traditional search engine volume would fall 25% by 2026; Google reported Search queries at an all-time high in the first quarter of 2026 and says AI Mode adds queries overall. Publishers surveyed by the Reuters Institute expect their search traffic to fall by 43% over three years, which is a forecast of referrals, not of searches.

The next figures to watch are Alphabet’s and Microsoft’s quarterly results, OpenAI’s weekly user updates and StatCounter’s monthly referral data. Each measures something different, so track them side by side rather than combining them into one market share.

Widely Quoted Figures, Checked

Several AI search statistics circulate without a source, or with a source that measures something else. Each one below is checked against the publisher’s own page.

Sources

Every figure on this page comes from one of the sources below.