AI search is now a measurable traffic channel, not a forecast. The numbers below cover how many people use AI answers, how often Google shows AI Overviews, how much click-through rate they cost, which sites AI cites, how much traffic AI assistants send, and what B2B buyers do with the answers.
Every stat links to the original study. Where studies disagree, both figures are listed. No predictions and no vendor benchmarks without a sample. For the Google baseline, see SEO statistics; for channel economics, see SEO vs PPC statistics; for pipeline data, see B2B SEO statistics.
How Many People Use AI Search in 2026
- 2.5 billion monthly users for AI Overviews, while AI Mode passed 1 billion within a year of launch. (Google)
- AI Mode queries more than doubled every quarter since launch, and Google Search queries reached an all-time high last quarter. (Google)
- Billions of clicks every week go to websites from AI features in Search, and Google says AI Mode adds to total search queries. (Alphabet)
- 200+ countries and 40+ languages get AI Overviews, and Google says they raised usage by over 10% for the queries that show them in the US and India. (Google)
- 950 million monthly users for the Gemini app, up from 400 million a year earlier, with daily users tripling. (Alphabet)
- 44% of US adults have used ChatGPT, up from 34% a year earlier, and about a quarter have used Gemini. (Pew Research Center)
- Near 1 billion monthly visits to ChatGPT in Semrush's US clickstream, a plateau that held from November 2025 into early 2026. (Semrush)
- About 10% of the world's adults had adopted ChatGPT by July 2025, and seeking information is one of the three topics that make up nearly 80% of conversations. (NBER)
- About half of US adults use AI chatbots, and roughly 1 in 4 use them every day. (Pew Research Center)
- 42% of US adults use chatbots to search for information. (Pew Research Center)
- 6 in 10 US adults read the AI summaries at the top of search results, while 3 in 10 don't. (Pew Research Center)
- AI sessions are 56% the size of search worldwide and 34% in the US, while prompts that ask for information are 28% the size of searches (17% in the US). (Graphite)
- 83% of AI use happens in mobile apps worldwide, and 75% in the US. (Graphite)
- Organic clicks "relatively stable" year over year, Google says, with slightly more quality clicks to websites, though it released no data. (Google)
How Often AI Overviews Appear
- 15.69% of keywords showed an AI Overview in November 2025, after rising from 6.49% in January to nearly 25% in July. (Semrush)
- 25.11% of Google searches showed an AI Overview across 21.9 million unique US searches from September 15 to October 12, 2025. (Conductor)
- 48% of tracked queries show an AI Overview, up from about 30% a year earlier, and the average one is over 1,200 pixels tall. (BrightEdge)
- 21% of all keywords show an AI Overview, rising to 57.9% of question queries and 46% of queries with 7+ words, but only 7.9% of local searches. (Ahrefs)
- 82.91% of branded searches on US desktop showed an AI Overview on September 29, 2026, and the monthly average climbed from 61.3% in July to 73.3% in September. (Ahrefs)
AI Overviews and Clicks
- 58% lower CTR for the #1 result when an AI Overview appears, up from a 34.5% drop in Ahrefs' April 2025 study. (Ahrefs)
- Position 1 CTR fell from 7.3% to 1.6% between December 2023 and December 2025 on keywords that show AI Overviews, compared with 7.6% to 3.9% on informational keywords without them. (Ahrefs)
- 8% of visits with an AI summary led to a click on a regular result, compared with 15% without one, and just 1% clicked a link inside the summary. (Pew Research Center)
- 2.4% organic CTR on queries with an AI Overview in February 2026, up from a low of 1.3% in December 2025. (Seer Interactive)
- 120% more clicks per impression for brands cited in an AI Overview than for uncited brands, though still 38% fewer than on queries with no AI Overview. (Seer Interactive)
- Organic CTR doubled from 0.7% to 1.7% during 2025 for brands cited in AI Overviews on transactional queries. (Seer Interactive)
- 5.2% CTR for the first source cited in an AI answer, 44% more than the #1 organic result on the same page (3.6%). (First Page Sage)
- Zero-click rate dipped from 33.75% to 31.53% on the same keywords after they started showing AI Overviews. (Semrush)
- 68.01% of Google searches in the US ended without a click from January to April 2026, and only 0.34% of searches went to AI Mode. (SparkToro)
- 92% to 94% of AI Mode searches ended without a click to another site, and AI Mode queries averaged 7.22 words compared with 4.0 in regular search. (Semrush)
- About 80% of consumers rely on zero-click results for at least 40% of their searches, which Bain estimates cuts organic traffic by 15% to 25%. (Bain & Company)
AI Referral Traffic
- 0.43% of visits came from AI assistants across 115,254 sites in September 2026 (ChatGPT 0.34%), compared with 26.82% from search. (Ahrefs)
- 9.9x growth in AI referral sessions over 19 months, with ChatGPT sending 92.4% of them. (Previsible)
- 50% drop in a single month in AI referral sessions in November 2025, driven by ChatGPT referrals falling from 448,412 in October to 213,345. (Previsible)
- 206% growth in 2025 in ChatGPT's outbound referral traffic, and 21.6% of it goes to Google. (Semrush)
- 87.4% of AI referral traffic comes from ChatGPT across Conductor's 10 industries. (Conductor)
- 1.5x to 2.5x the usual visits to a brand's site in the 7 days after an AI assistant mentions it, though only about 2.5% of those visits carry an AI referral tag. (Profound)
What AI Search Cites
- 37.9% of AI Overview citations rank in Google's top 10, down from about 76% in July 2025, and 31.0% rank outside the top 100. (Ahrefs)
- About 17% of AI Overview citations rank in the organic top 10 in BrightEdge's data, from 24% in healthcare to 11% in finance. (BrightEdge)
- 43.2% of #1 Google pages get cited by ChatGPT, 3.5x the rate for pages beyond Google's top 20. (AirOps)
- 34.5% of ChatGPT queries turned on web search in February 2026, down from 46% in late 2024. (Semrush)
- 65% to 85% of ChatGPT prompts match no keyword in Semrush's database, though search-style prompts rose from 18.9% to 34.9%. (Semrush)
- 14.4% of ChatGPT responses contain fan-out queries, and 75.9% of its most common site: searches point at a brand's own site. (Ahrefs)
- 88% fewer Reddit citations in ChatGPT over six months. (Ahrefs)
- 13.7% of citations overlap between AI Overviews and AI Mode, though a brand named in an AI Overview has a 61% chance of appearing in AI Mode too. (Ahrefs)
- 22.9% of AI Overview citations go to YouTube, followed by Reddit (18.5%), Facebook (10.1%), google.com (8.8%), Instagram (5.6%), Quora (4.7%) and Wikipedia (4.0%). (Ahrefs)
- Almost 72% of outside citations in branded AI Overviews go to Wikipedia, and 76.2% of those AI Overviews sit in position one. (Ahrefs)
- 0.737 correlation between YouTube mentions and brand visibility in AI answers, the strongest Ahrefs found, ahead of branded web mentions (0.66 to 0.71) and far ahead of site page count (0.194). (Ahrefs)
- Brands are 6.5x more likely to surface through third-party content than through their own site on commercial discovery queries. (AirOps)
- 84% of AI citations come from earned media, with journalism at 27% and paid content at 0.3%. (Muck Rack)
- 21.9% of citations go to listicles, ahead of articles (16.7%) and product pages (13.7%), and 80.9% of all citations point to third-party pages. (Wix Studio)
- 1% median AI citation rate for brands with no Trustpilot profile, compared with 53.5% for brands with as few as 1 to 13 reviews. (Seer Interactive)
- 75% of pages cited by AI were updated in the last year (88% in the last two years), and over a quarter of these fresh pages first went live more than two years ago. (Seer Interactive)
How Stable AI Answers Are
- Less than a 1 in 100 chance that ChatGPT or Google's AI gives the same list of brands in any two of 100 answers, and about 1 in 1,000 for the same order. (SparkToro)
- 70% chance of changing from one check of an AI Overview to the next, and 45.5% of citations change when it does. (Ahrefs)
- 2.87x more visits to 404 pages from AI assistants than from Google Search, and 2.38% of all URLs ChatGPT cites return a 404. (Ahrefs)
AI and B2B Buyers
- 51% of B2B software buyers start research in an AI chatbot more often than in Google, up from 29% in G2's 2025 report. (G2)
- 41% of B2B buyers use Deep Research tools for software evaluations, and 1 in 3 bought from a vendor they had never heard of before. (G2)
- 66% of B2B professionals regularly use AI to research vendors, and for product research 71% use ChatGPT, 61% Gemini, 45% Copilot, 18% Perplexity and 14% Claude. (Semrush)
- 45% of US consumers use ChatGPT or other AI tools for local business recommendations, up from 6% a year earlier. (BrightLocal)
- The #1 factor for local AI visibility is a listing on expert-curated "best of" lists, according to the local search experts Whitespark surveyed. (Whitespark)
AI Crawlers and Bots
- 4.2% of HTML requests came from AI bots on Cloudflare in 2025, while Googlebot alone made 4.5%. (Cloudflare)
- More than 15x growth in AI "user action" crawling in 2025, where bots fetch pages to answer a person's question. (Cloudflare)
- Over 28% of verified bot traffic came from Googlebot, compared with about 7.5% from OpenAI's GPTBot. (Cloudflare)
- 25,000 to 100,000 pages crawled by Anthropic for each visit it referred in 2025, compared with up to 3,700 for OpenAI, under 200 for Perplexity from September and 3 to 30 for Google. (Cloudflare)
- 4.5% of robots.txt files on desktop sites name GPTBot, up about 55% from 2.9% in 2024, while ClaudeBot appears in 3.6%, Google-Extended in 3.4% and PerplexityBot in 2.8%. (HTTP Archive)
- 79% of top news sites block AI training bots and 71% block AI retrieval bots, while 14% block all AI bots and 18% block none. (BuzzStream)
- About 75% of news sites that block OpenAI or Google AI bots still appear in AI citations. (BuzzStream)
- 2.1% of websites have an llms.txt file, and among 137K sites on Ahrefs Web Analytics, 28% publish one and 97% of those files got zero traffic in May 2026. (HTTP Archive)
Google search in 2026
- 73.7% of US desktop searches across 41 large sites ran on Google in Q4 2025, while search engines as a group had about 80%, commerce sites about 10%, social networks about 5.5% and AI tools 3.2%. (SparkToro and Datos)
- 68.01% of US Google searches ended without a click from January to April 2026, up from 60.45% in 2024. (SparkToro)
- About 45% of Google searches ended without a click ten years ago, measured on the older Jumpshot panel. (SparkToro)
- 22.6% CTR at position 1 on pages with no AI answer, against 3.6% when an AI answer shows and 7.1% blended. (First Page Sage)
- 48% of desktop Google searches end with no further activity, and only 20.4% lead to a click on a site outside Google. (Similarweb)
- 21.8% paid CTR on queries without an AI Overview in February 2026, down from 26% in January 2025, while paid CTR with an AI Overview rose from 14.6% to 16.2%. (Seer Interactive)
- 3.0% a month was the average monthly drop in Google referrals, while ChatGPT referrals grew 5.5% a month. (Ahrefs)
How B2B buyers use AI
- 94% of business buyers use AI during their buying process, up from 89% a year earlier. (Forrester)
- 2x as many buyers call generative AI a meaningful source compared with any other source. (Forrester)
- 94% of buyers use AI chat tools at some point during a purchase. (6sense)
- 51% of software buyers start research in an AI chatbot more often than in Google, up from 29%. (G2)
- 71% of software buyers rely on AI chatbots for software research, up from about 60% seven months earlier. (G2)
- 69% of software buyers picked a different vendor because of what an AI chatbot said. (G2)
- 45% of buyers say review site citations make them trust an AI answer most. (G2)
- 63% of tech buyers used AI in their last purchase, and 94% of them double-check it. (TrustRadius)
- About 9 in 10 B2B AI users say AI shaped their vendor shortlist, and about 45% say it shaped it a lot. (Semrush)
- 83% of B2B AI users say AI influenced their final vendor choice, and 32% call its influence major. (Semrush)
- 69% of B2B buyers want a sales rep to confirm what AI told them. (Gartner)
- 51% of B2B buyers say GenAI is the likelier source of misleading information, while 49% pick sales reps. (Gartner)
- 67% of B2B buyers would rather buy without talking to a sales rep. (Gartner)
AI and content
- 81.9% of top 20 pages mix AI and human writing (4.6% are pure AI and 13.5% pure human), and AI share correlates with rank at just 0.011. (Ahrefs)
- 50% better odds of strong results for bloggers who publish original research, and 2.6x the benchmark for those who work with influencers. (Orbit Media)
- 13.9% of bloggers say their blog delivers strong results, a record low, while 92.4% now use AI for blogging. (Orbit Media)
- 18% of bloggers say they don't know if their blog delivers results, a big jump from the year before. (Orbit Media)
- 7.9% of local searches trigger an AI Overview. (Ahrefs)
- 95% of B2B marketers say their organization uses applications powered by AI. (CMI and MarketingProfs)
- 45% of B2B marketers rank AI tools as a top area for new spending in 2026. (CMI)
AI Referral Traffic Estimator
This calculator applies the benchmarks above to your own site. Happily, it only needs your monthly sessions to start. Pick the baseline that fits you best, since enterprise brands in Conductor's data get a larger AI share than the wider set of sites in the Ahrefs tracker.
AI mentions also bring visits that carry no AI tag in your analytics. Profound measured 1.5x to 2.5x the usual brand site visits in the 7 days after a mention, with only about 2.5% tagged as AI, and none of that is counted here. An AI visibility audit shows how often AI answers name you today.
Sources: Conductor (Nov 2025), Ahrefs tracker (Sept 2026), StatCounter (Sept 2026), Previsible (Jul 2026; the 12.8% fast pace and the 7.6% "Other AI" share are our calculations from its data) and Profound (Jul 2026).
To walk through the default case, an enterprise IT brand with 50,000 sessions a month would expect about 1,400 AI referral sessions today at Conductor's 2.80%. At the fast pace for 12 months, that grows to about 5,940 a month.
FAQ
How much traffic do ChatGPT and other AI tools send to websites?
A small share, though it is growing quickly. Conductor measured AI referrals at 1.08% of traffic across enterprise sites in 2025, and the Ahrefs tracker found 0.43% across 115,254 sites in September 2026. Previsible saw AI referral sessions grow 9.9x in 19 months, with ChatGPT sending 92.4% of them.
How often do AI Overviews appear in Google?
Studies disagree because they measure different keywords. Broad studies from Semrush, Ahrefs and Conductor put it between 15.69% and 25.11% of searches in late 2025, and BrightEdge reports 48% of its tracked queries. Ahrefs found AI Overviews on 82.91% of US desktop branded searches by September 29, 2026.
Do AI Overviews reduce clicks?
Yes. Ahrefs found 58% lower CTR for the #1 result when an AI Overview appears, and Pew saw people click a regular result on 8% of visits with an AI summary, compared with 15% without one. Seer Interactive found organic CTR on these queries recovered to 2.4% in February 2026, and brands cited in the AI Overview got 120% more clicks than uncited brands.
How many people use AI Overviews, AI Mode and ChatGPT?
Google says AI Overviews have over 2.5 billion monthly users, AI Mode has passed 1 billion and the Gemini app has 950 million. In the US, about half of adults use AI chatbots and 44% have used ChatGPT (Pew, 2026). Worldwide, ChatGPT sends 80.48% of AI chatbot referrals (StatCounter).
Which websites do ChatGPT and AI Overviews cite most?
In Google AI Overviews, YouTube (22.9%), Reddit (18.5%) and Facebook (10.1%) have the largest citation shares (Ahrefs, September 2026). Across ChatGPT, Claude and Gemini, earned media makes up 84% of citations (Muck Rack), and listicles are the most-cited page type at 21.9% (Wix Studio). ChatGPT's Reddit citations dropped 88% in six months, so these shares can move quickly.
Does ranking on Google help you get cited by AI?
It helps, though less than it used to. Ahrefs found that 37.9% of AI Overview citations rank in the top 10, down from about 76% in July 2025, and BrightEdge puts the overlap near 17%. For ChatGPT, AirOps found that 43.2% of pages ranking #1 on Google get cited, 3.5x the rate for pages beyond the top 20.
Should I block AI crawlers or add an llms.txt file?
Blocking may not keep you out of AI answers, since about 75% of news sites that block OpenAI or Google AI bots still appear in AI citations (BuzzStream). Platforms differ a lot in what they give back: Cloudflare measured Anthropic crawling 25,000 to 100,000 pages per visit referred, compared with 3 to 30 for Google. An llms.txt file is optional, and 97% of the files Ahrefs tracked got zero traffic in May 2026.
Does traffic from AI search convert better?
The evidence is thin so far. The popular 15.9% conversion figure comes from a single client case study, so we left it out. Profound found that an AI mention lifts visits to a brand's site 1.5x to 2.5x over the next 7 days, while only about 2.5% of those visits carry an AI tag, so AI's effect on conversions is easy to undercount.
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