{"id":188544,"date":"2025-06-12T07:18:59","date_gmt":"2025-06-12T12:18:59","guid":{"rendered":"https:\/\/ahrefs.com\/blog\/?p=188544"},"modified":"2025-08-26T09:51:39","modified_gmt":"2025-08-26T14:51:39","slug":"top-mentioned-sources-are-not-shared-across-ai-assistants","status":"publish","type":"post","link":"https:\/\/ahrefs.com\/blog\/top-mentioned-sources-are-not-shared-across-ai-assistants\/","title":{"rendered":"86% of Top Mentioned Sources Are Not Shared Across ChatGPT, Perplexity, and AI Overviews"},"content":{"rendered":"\n<div class=\"intro-txt\">Good content is good content, and top websites are top websites. These things don\u2019t change. However, biases in the training data and partnerships can change which sources are mentioned by different AI Assistants.<\/div>\n\n\n\n<p>AI Assistants may also work slightly differently. By default, they don\u2019t have any notion of websites and can make up sources. Looking at you ChatGPT.<\/p>\n\n\n\n<p>Some systems are augmented with search, where they retrieve documents first and they\u2019re less likely to hallucinate results. Some bias towards partners that they paid to license the&nbsp;data.<\/p>\n\n\n<div class=\"intro-tok\" id=\"intro_tok\" style=\"display:none;\"><div class=\"intro-title\">Contents<\/div><a href=\"#\" class=\"expand-dots\"><span><\/span><span><\/span><span><\/span><\/a><\/div>\n\n\n\n<div class=\"post-nav-link clearfix\" id=\"section1\"><a class=\"subhead-anchor\" data-tip=\"tooltip__copielink\" rel=\"#section1\"><svg width=\"19\" height=\"19\" viewBox=\"0 0 14 14\" style><g fill=\"none\" fill-rule=\"evenodd\"><path d=\"M0 0h14v14H0z\" \/><path d=\"M7.45 9.887l-1.62 1.621c-.92.92-2.418.92-3.338 0a2.364 2.364 0 0 1 0-3.339l1.62-1.62-1.273-1.272-1.62 1.62a4.161 4.161 0 1 0 5.885 5.884l1.62-1.62L7.45 9.886zM5.527 5.135L7.17 3.492c.92-.92 2.418-.92 3.339 0 .92.92.92 2.418 0 3.339L8.866 8.473l1.272 1.273 1.644-1.643A4.161 4.161 0 1 0 5.897 2.22L4.254 3.863l1.272 1.272zm-.66 3.998a.749.749 0 0 1 0-1.06l2.208-2.206a.749.749 0 1 1 1.06 1.06L5.928 9.133a.75.75 0 0 1-1.061 0z\" style \/><\/g><\/svg><\/a><div class=\"link-text\" data-anchor=\"Only 14% of the top 50 mentioned sources were shared across ChatGPT, Perplexity, and Google AI\" data-section=\"mention-share-top-domains\">\n\n\n\n<h2 class=\"wp-block-heading\"><a id=\"post-188544-_7qdgobonfw3g\"><\/a>Only 14% of the top 50 mentioned sources were shared across ChatGPT, Perplexity, and Google AI<\/h2>\n\n\n\n<\/div><\/div>\n\n\n\n<p>Looking at the top 50 most mentioned websites in <a href=\"https:\/\/ahrefs.com\/brand-radar\">Ahrefs Brand Radar<\/a> for AI Overviews, ChatGPT, and Perplexity, only 7 websites are in the top 50 results for all of&nbsp;them.<\/p>\n\n\n\n<p>This is across ~76.7M AI Overviews, 957k ChatGPT prompts, and 953.5k Perplexity prompts for the month of June&nbsp;2025.<\/p>\n\n\n<div class=\"sidenote\"><div class=\"sidenote-title\">Sidenote.<\/div>Brand Radar isn\u2019t just another LLM visibility monitor, we track a large amount of queries across all of these systems and you can query for any product, service, or brand and compare vs competitors. It\u2019s more like Site Explorer than it is Rank Tracker.<\/div>\n\n\n\n<p>Here\u2019s what Brand Radar looks&nbsp;like.<\/p>\n\n\n\n<figure class=\"wp-block-image\"><img loading=\"lazy\" decoding=\"async\" width=\"3138\" height=\"6162\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1.jpg\" alt=\"Ahrefs Brand Radar\" class=\"wp-image-188539\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1.jpg 3138w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1-216x425.jpg 216w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1-768x1508.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1-782x1536.jpg 782w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1-1043x2048.jpg 1043w\" sizes=\"auto, (max-width: 3138px) 100vw, 3138px\"><\/figure>\n\n\n\n<p>Here\u2019s the overlap:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1973\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-2.jpg\" alt=\"top 50 mentioned brands overlap count by ai assistants\" class=\"wp-image-188949\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-2.jpg 1600w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-2-345x425.jpg 345w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-2-768x947.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-2-1246x1536.jpg 1246w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\"><\/figure>\n\n\n\n<p>And here\u2019s what is included in&nbsp;each:<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1973\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-3.jpg\" alt=\"top 50 mentioned brands overlap by ai assistants\" class=\"wp-image-188951\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-3.jpg 1600w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-3-345x425.jpg 345w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-3-768x947.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/image-2-3-1246x1536.jpg 1246w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\"><\/figure>\n\n\n\n<p><br><\/p><div class=\"post-nav-link clearfix\" id=\"section1\"><a class=\"subhead-anchor\" data-tip=\"tooltip__copielink\" rel=\"#section1\"><svg width=\"19\" height=\"19\" viewBox=\"0 0 14 14\" style><g fill=\"none\" fill-rule=\"evenodd\"><path d=\"M0 0h14v14H0z\" \/><path d=\"M7.45 9.887l-1.62 1.621c-.92.92-2.418.92-3.338 0a2.364 2.364 0 0 1 0-3.339l1.62-1.62-1.273-1.272-1.62 1.62a4.161 4.161 0 1 0 5.885 5.884l1.62-1.62L7.45 9.886zM5.527 5.135L7.17 3.492c.92-.92 2.418-.92 3.339 0 .92.92.92 2.418 0 3.339L8.866 8.473l1.272 1.273 1.644-1.643A4.161 4.161 0 1 0 5.897 2.22L4.254 3.863l1.272 1.272zm-.66 3.998a.749.749 0 0 1 0-1.06l2.208-2.206a.749.749 0 1 1 1.06 1.06L5.928 9.133a.75.75 0 0 1-1.061 0z\" style \/><\/g><\/svg><\/a><div class=\"link-text\" data-anchor=\"Why are they different?\" data-section=\"why\">\n\n\n\n<h2 class=\"wp-block-heading\"><a id=\"post-188544-_biptbjxt5qjm\"><\/a>Why are they different?<\/h2>\n\n\n\n<\/div><\/div>\n\n\n\n<p>Systems work in slightly different ways. For example:<\/p>\n\n\n\n<table id=\"tablepress-424\" class=\"tablepress tablepress-id-424 tablepress-responsive tablepress-ahrefs-width-full\">\n<thead>\n<tr class=\"row-1 odd\">\n\t<th class=\"column-1\">Platform<\/th><th class=\"column-2\">How it chooses citations<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"row-2 even\">\n\t<td class=\"column-1\">Perplexity<\/td><td class=\"column-2\">Real-time web search \u2192 ranks \u2192 quotes \u2192 cites best matching source<\/td>\n<\/tr>\n<tr class=\"row-3 odd\">\n\t<td class=\"column-1\">ChatGPT (with browsing)<\/td><td class=\"column-2\">Search \u2192 filters for trusted\/licensed domains \u2192&nbsp;cites<\/td>\n<\/tr>\n<tr class=\"row-4 even\">\n\t<td class=\"column-1\">ChatGPT (default)<\/td><td class=\"column-2\">No citations unless prebuilt \u2192 may hallucinate<\/td>\n<\/tr>\n<tr class=\"row-5 odd\">\n\t<td class=\"column-1\">Google AI Overviews<\/td><td class=\"column-2\">From search index \u2192 curated citation list<\/td>\n<\/tr>\n<tr class=\"row-6 even\">\n\t<td class=\"column-1\">Bing Copilot<\/td><td class=\"column-2\">Uses Bing search \u2192 highlights snippets \u2192 includes citations<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-424 from cache -->\n\n\n<p>Various biases and different methodologies mean that even for the same queries, these systems may cite completely different websites.<\/p>\n\n\n\n<p>There are going to be additional biases introduced based on the <a href=\"https:\/\/ahrefs.com\/blog\/ai-bot-block-rates\/\">types of sites blocking AI bots<\/a> and those that render JavaScript like Google, vs those that don\u2019t, which is most of the rest of&nbsp;them.<\/p>\n\n\n\n<div class=\"post-nav-link clearfix\" id=\"section1\"><a class=\"subhead-anchor\" data-tip=\"tooltip__copielink\" rel=\"#section1\"><svg width=\"19\" height=\"19\" viewBox=\"0 0 14 14\" style><g fill=\"none\" fill-rule=\"evenodd\"><path d=\"M0 0h14v14H0z\" \/><path d=\"M7.45 9.887l-1.62 1.621c-.92.92-2.418.92-3.338 0a2.364 2.364 0 0 1 0-3.339l1.62-1.62-1.273-1.272-1.62 1.62a4.161 4.161 0 1 0 5.885 5.884l1.62-1.62L7.45 9.886zM5.527 5.135L7.17 3.492c.92-.92 2.418-.92 3.339 0 .92.92.92 2.418 0 3.339L8.866 8.473l1.272 1.273 1.644-1.643A4.161 4.161 0 1 0 5.897 2.22L4.254 3.863l1.272 1.272zm-.66 3.998a.749.749 0 0 1 0-1.06l2.208-2.206a.749.749 0 1 1 1.06 1.06L5.928 9.133a.75.75 0 0 1-1.061 0z\" style \/><\/g><\/svg><\/a><div class=\"link-text\" data-anchor=\"How they bias\" data-section=\"how-bias\">\n\n\n\n<h2 class=\"wp-block-heading\"><a id=\"post-188544-_sqowxb4c4n2p\"><\/a>How they&nbsp;bias<\/h2>\n\n\n\n<\/div><\/div>\n\n\n\n<p>Google AI Overviews lean towards the same top sites we\u2019re used to seeing in search results. There\u2019s a heavy emphasis on authoritative websites for health, finance, encyclopedic knowledge, social media, as well as a bias for Google-owned properties. Notably missing are media sites, non-Google entertainment sites, and ecommerce sites.<\/p>\n\n\n\n<p>ChatGPT leans more on publishers and non-Google media, especially for news, entertainment, and sports. They have licensing deals and partnerships with many of the cited websites. ChatGPT doesn\u2019t have much around health or medicine.<\/p>\n\n\n\n<p>Perplexity pulls from a broader international corpus. There are many local and regional brands that weren\u2019t in the top 50 for the other AI assistants. Perplexity doesn\u2019t have social websites or traditional Western media.<\/p>\n\n\n\n<div class=\"further-reading\"><div class=\"reading-title\">Further reading<\/div><div class=\"reading-content\">\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/ahrefs.com\/blog\/top-10-most-cited-domains-ai-assistants\/\">The 10 Most Mentioned Domains for ChatGPT, Perplexity, and AI Overviews Across 78.6M Searches<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/ahrefs.com\/blog\/ai-overview-brand-correlation\/\">An Analysis of AI Overview Brand Visibility Factors (75K Brands Studied)<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/ahrefs.com\/blog\/insights-from-56-million-ai-overviews\/\">Insights From 55.8M AI Overviews Across 590M Searches\u2014A Study by Ahrefs<\/a><\/li>\n<\/ul>\n\n\n\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>AI Assistants may also work slightly differently. By default, they don\u2019t have any notion of websites and can make up sources. Looking at you ChatGPT. Some systems are augmented with search, where they retrieve documents first and they\u2019re less likely<span class=\"ellipsis\">\u2026<\/span><\/p>\n<div class=\"read-more\">Read more \u203a<\/div>\n<p><!-- end of .read-more --><\/p>\n","protected":false},"author":150,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[469,414],"tags":[],"coauthors":[377],"class_list":["post-188544","post","type-post","status-publish","format-standard","hentry","category-ai-search","category-data-studies","odd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>86% of Top Mentioned Sources Are Not Shared Across ChatGPT, Perplexity, and AI Overviews<\/title>\n<meta name=\"description\" content=\"Looking at the 50 most mentioned websites for AI Overviews, ChatGPT, and Perplexity, only 7 websites are in the top 50 results for all of them.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/ahrefs.com\/blog\/top-mentioned-sources-are-not-shared-across-ai-assistants\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"86% of Top Mentioned Sources Are Not Shared Across ChatGPT, Perplexity, and AI Overviews\" \/>\n<meta property=\"og:description\" content=\"Looking at the 50 most mentioned websites for AI Overviews, ChatGPT, and Perplexity, only 7 websites are in the top 50 results for all of them.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ahrefs.com\/blog\/top-mentioned-sources-are-not-shared-across-ai-assistants\/\" \/>\n<meta property=\"og:site_name\" content=\"SEO Blog by Ahrefs\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/Ahrefs\/\" \/>\n<meta property=\"article:author\" content=\"patrickstox\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-12T12:18:59+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-26T14:51:39+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/brand-radar1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"3138\" \/>\n\t<meta property=\"og:image:height\" content=\"6162\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Patrick Stox\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@patrickstox\" \/>\n<meta name=\"twitter:site\" content=\"@ahrefs\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/top-mentioned-sources-are-not-shared-across-ai-assistants\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/top-mentioned-sources-are-not-shared-across-ai-assistants\\\/\"},\"author\":{\"name\":\"Patrick Stox\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#\\\/schema\\\/person\\\/14bf754248f3c561786477e4e5fd2067\"},\"headline\":\"86% of Top Mentioned Sources Are Not Shared Across ChatGPT, Perplexity, and AI Overviews\",\"datePublished\":\"2025-06-12T12:18:59+00:00\",\"dateModified\":\"2025-08-26T14:51:39+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/top-mentioned-sources-are-not-shared-across-ai-assistants\\\/\"},\"wordCount\":520,\"publisher\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/top-mentioned-sources-are-not-shared-across-ai-assistants\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/86-of-top-mentioned-sources-are-by-patrick-stox-data-studies.jpg\",\"articleSection\":[\"AI Search\",\"Data &amp; 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