{"id":189302,"date":"2025-07-02T05:29:41","date_gmt":"2025-07-02T10:29:41","guid":{"rendered":"https:\/\/ahrefs.com\/blog\/?p=189302"},"modified":"2025-08-26T09:47:11","modified_gmt":"2025-08-26T14:47:11","slug":"best-ai-detectors-tested","status":"publish","type":"post","link":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/","title":{"rendered":"The 8 Best AI Detectors, Tested and Compared"},"content":{"rendered":"<div class=\"intro-txt\">We recently launched our new AI detector. For almost any webpage, you can analyze the likelihood that AI was used to create it, highlight AI-generated sections of text, and even identify the specific AI models used to create the&nbsp;text.<\/div>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1834\" height=\"1370\" class=\"wp-image-189303\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg 1834w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1-569x425.jpg 569w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1-768x574.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1-1536x1147.jpg 1536w\" sizes=\"auto, (max-width: 1834px) 100vw, 1834px\"><\/p>\n<p>There are tons of AI detectors available. And, while ours is the only one that can <em>also <\/em>show you any webpage\u2019s backlinks and estimated search traffic, how the page content has changed over time, and how it performs relative to other&nbsp;pages\u2026<\/p>\n<p>\u2026we still wanted to know how Ahrefs\u2019 AI detector compares to other popular detectors. So we tested it.<\/p>\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=\"Methodology\" data-section=\"methodology\">\n<h2><a id=\"post-189302-_8mortcw2y43x\"><\/a>Methodology<\/h2>\n<\/div><\/div>\n<p>I took a sample of nine articles, consisting of three <strong>human-written<\/strong> articles, three fully <strong>AI-generated<\/strong> articles, and three <strong>hybrid<\/strong> articles containing a mixture of 50% human-written and 50% AI-generated content.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-189304\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-2.png\" alt=\"A real Ahrefs blog post I co-wrote with ChatGPT helping out.\" width=\"1722\" height=\"1258\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-2.png 1722w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-2-582x425.png 582w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-2-768x561.png 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-2-1536x1122.png 1536w\" sizes=\"auto, (max-width: 1722px) 100vw, 1722px\"><\/p>\n<p>I analyzed each article with free AI detectors from Ahrefs (that\u2019s us), Scribbr, Grammarly, ZeroGPT, Copyleaks, Writer, GPTZero, and Originality.ai. In some cases, it was necessary to truncate the text sample tested.<\/p>\n<p>I normalized the results (for example, translating a \u201c24% human\u201d score to the equivalent \u201c76% AI\u201d) and scored them using the following rubric:<\/p>\n<ul>\n<li><strong>2 points<\/strong> if the detector\u2019s score is within \u00b110 percentage points of the actual.<\/li>\n<li><strong>1 point<\/strong> if it\u2019s within \u00b120 points.<\/li>\n<li><strong>0 points<\/strong> otherwise.<\/li>\n<\/ul>\n<p>Importantly, this is not a scientific test. This is a very small sample size, my scoring rubric is arbitrary, and these are all articles I have either written, generated, or edited. This was necessary to ensure I knew the makeup of each article, but it means that these samples are biased towards a particular style of writing (mine).<\/p>\n<p>Instead, think of this as a quick pulse check of the state of AI content detectors. Many of the leading AI detectors performed very&nbsp;well.<\/p>\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=\"The best AI detectors\" data-section=\"the-best-ai-detectors\">\n<h2><a id=\"post-189302-_fywh14p5syuk\"><\/a>The best AI detectors<\/h2>\n<\/div><\/div>\n<p>Based on my testing, Ahrefs\u2019 AI detector and Copyleaks were the best-performing AI detectors, with GPTZero and <a href=\"http:\/\/originality.ai\">Originality.ai<\/a> close behind. At the other end of the scale, Grammarly and Writer performed the worst in my testing.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189527\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/1-best-ai-detector.png\" alt width=\"2263\" height=\"1671\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/1-best-ai-detector.png 2263w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/1-best-ai-detector-576x425.png 576w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/1-best-ai-detector-768x567.png 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/1-best-ai-detector-1536x1134.png 1536w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/1-best-ai-detector-2048x1512.png 2048w\" sizes=\"auto, (max-width: 2263px) 100vw, 2263px\"><\/p>\n<p>Interestingly, false positives were not a big issue. Only 2\/24 tests run on human-written content incorrectly flagged the text sample as AI-generated. All the AI detectors struggled the most with the hybrid human\/AI content (for reasons explained below).<\/p>\n<p>In the table below, you can see the actual AI content of each test article, followed by each tool\u2019s analysis:<\/p>\n\n<table id=\"tablepress-431\" class=\"tablepress tablepress-id-431 tablepress-responsive tablepress-ahrefs-width-720px\">\n<thead>\n<tr class=\"row-1 odd\">\n\t<th class=\"column-1\">Actual AI%<\/th><th class=\"column-2\">Ahrefs<\/th><th class=\"column-3\">Copyleaks<\/th><th class=\"column-4\">GPTZero<\/th><th class=\"column-5\">Originality.ai<\/th><th class=\"column-6\">Scribbr<\/th><th class=\"column-7\">ZeroGPT<\/th><th class=\"column-8\">Grammarly<\/th><th class=\"column-9\">Writer<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"row-2 even\">\n\t<td class=\"column-1\">100%<\/td><td class=\"column-2\">100%<\/td><td class=\"column-3\">100%<\/td><td class=\"column-4\">92%<\/td><td class=\"column-5\">100%<\/td><td class=\"column-6\">94%<\/td><td class=\"column-7\">99.62%<\/td><td class=\"column-8\">59%<\/td><td class=\"column-9\">24%<\/td>\n<\/tr>\n<tr class=\"row-3 odd\">\n\t<td class=\"column-1\">100%<\/td><td class=\"column-2\">100%<\/td><td class=\"column-3\">100%<\/td><td class=\"column-4\">100%<\/td><td class=\"column-5\">100%<\/td><td class=\"column-6\">100%<\/td><td class=\"column-7\">98.99%<\/td><td class=\"column-8\">57%<\/td><td class=\"column-9\">23%<\/td>\n<\/tr>\n<tr class=\"row-4 even\">\n\t<td class=\"column-1\">100%<\/td><td class=\"column-2\">86%<\/td><td class=\"column-3\">83.8%<\/td><td class=\"column-4\">52%<\/td><td class=\"column-5\">64%<\/td><td class=\"column-6\">0%<\/td><td class=\"column-7\">67.76%<\/td><td class=\"column-8\">7%<\/td><td class=\"column-9\">15%<\/td>\n<\/tr>\n<tr class=\"row-5 odd\">\n\t<td class=\"column-1\">0%<\/td><td class=\"column-2\">2%<\/td><td class=\"column-3\">0%<\/td><td class=\"column-4\">0%<\/td><td class=\"column-5\">0%<\/td><td class=\"column-6\">0%<\/td><td class=\"column-7\">0%<\/td><td class=\"column-8\">0%<\/td><td class=\"column-9\">2%<\/td>\n<\/tr>\n<tr class=\"row-6 even\">\n\t<td class=\"column-1\">0%<\/td><td class=\"column-2\">6%<\/td><td class=\"column-3\">0%<\/td><td class=\"column-4\">0%<\/td><td class=\"column-5\">0%<\/td><td class=\"column-6\">0%<\/td><td class=\"column-7\">2.76%<\/td><td class=\"column-8\">0%<\/td><td class=\"column-9\">2%<\/td>\n<\/tr>\n<tr class=\"row-7 odd\">\n\t<td class=\"column-1\">0%<\/td><td class=\"column-2\">0%<\/td><td class=\"column-3\">0%<\/td><td class=\"column-4\">4%<\/td><td class=\"column-5\">0%<\/td><td class=\"column-6\">0%<\/td><td class=\"column-7\">91.69%<\/td><td class=\"column-8\">0%<\/td><td class=\"column-9\">27%<\/td>\n<\/tr>\n<tr class=\"row-8 even\">\n\t<td class=\"column-1\">50%<\/td><td class=\"column-2\">13%<\/td><td class=\"column-3\">46.4%<\/td><td class=\"column-4\">42%<\/td><td class=\"column-5\">46%<\/td><td class=\"column-6\">0%<\/td><td class=\"column-7\">39.06%<\/td><td class=\"column-8\">0%<\/td><td class=\"column-9\">0%<\/td>\n<\/tr>\n<tr class=\"row-9 odd\">\n\t<td class=\"column-1\">50%<\/td><td class=\"column-2\">32%<\/td><td class=\"column-3\">0%<\/td><td class=\"column-4\">28%<\/td><td class=\"column-5\">4%<\/td><td class=\"column-6\">0%<\/td><td class=\"column-7\">29.4%<\/td><td class=\"column-8\">0%<\/td><td class=\"column-9\">5%<\/td>\n<\/tr>\n<tr class=\"row-10 even\">\n\t<td class=\"column-1\">50%<\/td><td class=\"column-2\">70%<\/td><td class=\"column-3\">100%<\/td><td class=\"column-4\">86%<\/td><td class=\"column-5\">4%<\/td><td class=\"column-6\">83%<\/td><td class=\"column-7\">83.21%<\/td><td class=\"column-8\">0%<\/td><td class=\"column-9\">6%<\/td>\n<\/tr>\n<\/tbody>\n<tfoot>\n<tr class=\"row-11 odd\">\n\t<th class=\"column-1\">Score<\/th><th class=\"column-2\">13<\/th><th class=\"column-3\">13<\/th><th class=\"column-4\">12<\/th><th class=\"column-5\">12<\/th><th class=\"column-6\">10<\/th><th class=\"column-7\">9<\/th><th class=\"column-8\">6<\/th><th class=\"column-9\">4<\/th>\n<\/tr>\n<\/tfoot>\n<\/table>\n<!-- #tablepress-431 from cache -->\n<h3><a id=\"post-189302-_5e1pzrameba\"><\/a>Ahrefs\u2019 AI Detector<\/h3>\n<p><strong>Score: <\/strong>13\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/ahrefs.com\/writing-tools\/ai-content-detector\">https:\/\/ahrefs.com\/writing-tools\/ai-content-detector<\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189321\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-Ahrefs.jpg\" alt width=\"1852\" height=\"1272\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-Ahrefs.jpg 1852w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-Ahrefs-619x425.jpg 619w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-Ahrefs-768x527.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-Ahrefs-1536x1055.jpg 1536w\" sizes=\"auto, (max-width: 1852px) 100vw, 1852px\"><\/p>\n<p>Ahrefs AI Detector showed good accuracy across the board, with no false positives for human-written content, and good detection for AI content. It also managed to detect the specific model types used for the AI content: GPT-4o and Meta\u2019s Llama.<\/p>\n<p>By my criteria, it failed one out of nine tests, struggling to identify AI content that was blended with human writing. This is a known limitation of all AI detection tools (more on that below), and was true of all detection models.<\/p>\n<p>Ahrefs AI detector is based on our own proprietary detection model, trained on a huge amount of web content. It\u2019s unique among AI detectors because you can use it in conjunction with tons of other Ahrefs data points to see how content actually performs.<\/p>\n<p>You can use Ahrefs\u2019 AI detector to&nbsp;see:<\/p>\n<ul>\n<li>Which AI models are the best for <strong>creating high-quality content<\/strong>.<\/li>\n<li>How often <strong>your competitors publish AI content<\/strong>, and which models they&nbsp;use.<\/li>\n<li>How much AI content is <strong>present in a particular SERP<\/strong>, and how much effort you might need to invest to&nbsp;rank.<\/li>\n<li>How organic performance metrics <strong>correlate with different levels of AI use<\/strong>, like search traffic, keyword rankings, and backlinks.<\/li>\n<li>Whether AI content use <strong>correlates with traffic drops<\/strong> on particular pages or in particular subfolders.<\/li>\n<\/ul>\n<div class=\"recommendation\"><div class=\"recommendation-title\">How to use Ahrefs\u2019 AI detector<\/div><div class=\"recommendation-content\">\n<p>Start by heading to <a href=\"https:\/\/ahrefs.com\/site-explorer\"><strong>Site Explorer<\/strong><\/a> and pasting the URL you want to analyse. From&nbsp;there:<\/p>\n<ol>\n<li>Click the <strong>Page inspect<\/strong> report tab in the left sidebar.<\/li>\n<li>Choose the <strong>AI Detector <\/strong>tab.<\/li>\n<li>See your AI content level report in the right sidebar. Text that our model has detected as likely AI-generated will be color-coded according to the colors in the pie&nbsp;chart<\/li>\n<\/ol>\n<p>In this example, our AI detector has found a section of my blog post that I used ChatGPT\u2019s GPT-4o model to generate:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1678\" height=\"1362\" class=\"wp-image-189305\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-3.jpg\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-3.jpg 1678w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-3-524x425.jpg 524w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-3-768x623.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-3-1536x1247.jpg 1536w\" sizes=\"auto, (max-width: 1678px) 100vw, 1678px\"><\/p>\n<p>From there, you can also see how the page content has changed over time, how many backlinks it has earned, how many keywords it ranks for, how much estimated organic traffic it receives\u2026<\/p>\n<p>You can also test out the model via our <a href=\"https:\/\/ahrefs.com\/site-explorer\">free AI content detector<\/a> page. We\u2019re also adding bulk AI content detection to the <strong>Top pages<\/strong> report in Site Explorer (coming soon).<\/p>\n<\/div><\/div>\n<h3><a id=\"post-189302-_k1v4xrh1vkyp\"><\/a>Copyleaks<\/h3>\n<p><strong>Score: <\/strong>13\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/copyleaks.com\/ai-content-detector\">https:\/\/copyleaks.com\/ai-content-detector&nbsp;<\/a><\/p>\n<p>Copyleaks matched the top score, showing solid detection ability across both extremes of AI content. It proved especially effective at catching obvious AI writing, though it occasionally faltered in mixed or borderline passages.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189326\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-copyleaks.jpg\" alt width=\"2280\" height=\"1218\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-copyleaks.jpg 2280w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-copyleaks-680x363.jpg 680w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-copyleaks-768x410.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-copyleaks-1536x821.jpg 1536w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-copyleaks-2048x1094.jpg 2048w\" sizes=\"auto, (max-width: 2280px) 100vw, 2280px\"><\/p>\n<h3><a id=\"post-189302-_6jl2zrbn402\"><\/a>GPTZero<\/h3>\n<p><strong>Score: <\/strong>12\/18<\/p>\n<p><strong>URL:<\/strong> <a href=\"https:\/\/gptzero.me\">https:\/\/gptzero.me<\/a><\/p>\n<p>GPTZero offered reliable results overall, with a clear strength in catching high-percentage AI content. However, it sometimes hesitated in assigning confident AI probabilities to mid-range or hybrid examples, slightly affecting its total accuracy.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189324\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-gptzero.jpg\" alt width=\"2194\" height=\"1060\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-gptzero.jpg 2194w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-gptzero-680x329.jpg 680w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-gptzero-768x371.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-gptzero-1536x742.jpg 1536w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-gptzero-2048x989.jpg 2048w\" sizes=\"auto, (max-width: 2194px) 100vw, 2194px\"><\/p>\n<h3><a id=\"post-189302-_34pjt7i92q0e\"><\/a>Originality.ai<\/h3>\n<p><strong>Score: <\/strong>12\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/originality.ai\/ai-checker\">https:\/\/originality.ai\/ai-checker<\/a><\/p>\n<p>Originality.ai performed well in most cases, accurately flagging AI-heavy text but showing a tendency to overestimate human authorship when faced with subtle or well-edited AI-generated material.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189325\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-originality.jpg\" alt width=\"2256\" height=\"1262\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-originality.jpg 2256w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-originality-680x380.jpg 680w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-originality-768x430.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-originality-1536x859.jpg 1536w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-originality-2048x1146.jpg 2048w\" sizes=\"auto, (max-width: 2256px) 100vw, 2256px\"><\/p>\n<h3><a id=\"post-189302-_x9uzc3sjerb3\"><\/a>Scribbr<\/h3>\n<p><strong>Score:<\/strong> 10\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/www.scribbr.com\/ai-detector\/\">https:\/\/www.scribbr.com\/ai-detector\/<\/a><\/p>\n<p>Scribbr landed in the middle of the pack, handling clear-cut AI content reasonably well but displaying a drop in performance on more nuanced pieces, where its predictions tended to be inconsistent or overly cautious.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189323\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-scribbr.jpg\" alt width=\"1928\" height=\"1272\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-scribbr.jpg 1928w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-scribbr-644x425.jpg 644w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-scribbr-768x507.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-scribbr-1536x1013.jpg 1536w\" sizes=\"auto, (max-width: 1928px) 100vw, 1928px\"><\/p>\n<h3><a id=\"post-189302-_wcej93m2kvgy\"><\/a>ZeroGPT<\/h3>\n<p><strong>Score: <\/strong>9\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/zerogpt.com\">https:\/\/zerogpt.com<\/a><\/p>\n<p>ZeroGPT\u2019s performance was uneven\u2014it occasionally nailed high-AI content but frequently misclassified partial-AI and low-AI samples. The tool\u2019s sensitivity seemed skewed toward extremes, resulting in a less balanced profile.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189322\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-ZeroGPT.jpg\" alt width=\"1942\" height=\"712\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-ZeroGPT.jpg 1942w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-ZeroGPT-680x249.jpg 680w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-ZeroGPT-768x282.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-ZeroGPT-1536x563.jpg 1536w\" sizes=\"auto, (max-width: 1942px) 100vw, 1942px\"><\/p>\n<h3><a id=\"post-189302-_dboosmehrm1y\"><\/a>Grammarly<\/h3>\n<p><strong>Score:<\/strong> 6\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/www.grammarly.com\/ai-detector\">https:\/\/www.grammarly.com\/ai-detector<\/a><\/p>\n<p>Grammarly\u2019s free AI detector struggled with accurate AI detection, offering low-confidence or inaccurate predictions in many cases. It often failed to recognize clear signs of AI authorship and was unreliable on mixed or borderline content.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189319\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-grammarly.jpg\" alt width=\"2020\" height=\"1232\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-grammarly.jpg 2020w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-grammarly-680x415.jpg 680w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-grammarly-768x468.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-grammarly-1536x937.jpg 1536w\" sizes=\"auto, (max-width: 2020px) 100vw, 2020px\"><\/p>\n<h3><a id=\"post-189302-_enyy0b2xa830\"><\/a>Writer<\/h3>\n<p><strong>Score: <\/strong>4\/18<\/p>\n<p><strong>URL: <\/strong><a href=\"https:\/\/writer.com\/ai-content-detector\/\">https:\/\/writer.com\/ai-content-detector\/<\/a><\/p>\n<p>Writer\u2019s free AI detector scored the lowest, frequently misidentifying or entirely missing AI-generated material. It lacked precision across the board and provided little useful signal even when dealing with content that was 100% AI-written.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-189320\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-writer.jpg\" alt width=\"2236\" height=\"982\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-writer.jpg 2236w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-writer-680x299.jpg 680w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-writer-768x337.jpg 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-writer-1536x675.jpg 1536w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/best-ai-detectors-writer-2048x899.jpg 2048w\" sizes=\"auto, (max-width: 2236px) 100vw, 2236px\"><\/p>\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 AI detectors work\" data-section=\"how-ai-detectors-work\">\n<h2><a id=\"post-189302-_udef8tg0nyd2\"><\/a>How AI detectors work<\/h2>\n<\/div><\/div>\n<p>All AI content detectors work in the same basic way: they look for patterns or abnormalities in text that appear slightly different from those in human-written text.<\/p>\n<p>To do that, you need two things: lots of examples of both human-written and AI-generated text to compare, and a mathematical model to use for the analysis.<\/p>\n\n<table id=\"tablepress-381\" class=\"tablepress tablepress-id-381 tablepress-responsive tablepress-ahrefs-width-720px\">\n<thead>\n<tr class=\"row-1 odd\">\n\t<th class=\"column-1\">Example text<\/th><th class=\"column-2\">Word frequencies<\/th><th class=\"column-3\">N-gram frequencies<\/th><th class=\"column-4\">Syntactic structures<\/th><th class=\"column-5\">Stylistic notes<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr class=\"row-2 even\">\n\t<td class=\"column-1\">\u201cThe cat sat on the mat. Then the cat yawned.\u201d<\/td><td class=\"column-2\">the: 3<br>\ncat:&nbsp;2<br>\nsat:&nbsp;1<br>\non:&nbsp;1<br>\nmat:&nbsp;1<br>\nthen:&nbsp;1<br>\nyawned: 1<\/td><td class=\"column-3\">Bigrams<br>\n\u201cthe cat\u201d:&nbsp;2<br>\n\u201ccat sat\u201d:&nbsp;1<br>\n\u201csat on\u201d:&nbsp;1<br>\n\u201con the\u201d:&nbsp;1<br>\n\u201cthe mat\u201d:&nbsp;1<br>\n\u201cthen the\u201d:&nbsp;1<br>\n\u201ccat yawned\u201d: 1<\/td><td class=\"column-4\">Contains S-V (Subject-Verb) pairs such as \u201cthe cat sat\u201d and \u201cthe cat yawned.\u201d<\/td><td class=\"column-5\">Third-person viewpoint; neutral tone.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-381 from cache -->\n<p>The table above provides examples of the types of writing structures that AI detectors can identify. These patterns will appear different between AI-generated and human-written content.<\/p>\n<p>Most AI detectors today use neural networks, computer systems that loosely mimic how the human brain works. They contain artificial neurons, and through practice (known as training), the connections between the neurons adjust to get better at their intended goal: identifying AI-generated text.<\/p>\n<p>Even small models can do a good job at AI detection, as long as they\u2019re trained with enough data (at least a few thousand examples).<\/p>\n<p>In the academic literature, AI detectors routinely hit <a href=\"https:\/\/ahrefs.com\/blog\/how-do-ai-content-detectors-work\/\">80% (or greater) successful detection rates<\/a>. But all AI detectors are statistical models. They deal in probabilities, not certainty, and as our testing shows, they can be incredibly accurate, but they <strong>always carry the risk of errors and false positives.<\/strong><\/p>\n<div class=\"further-reading\"><div class=\"reading-title\">Further reading<\/div><div class=\"reading-content\">\n<ul>\n<li><a href=\"https:\/\/ahrefs.com\/blog\/how-do-ai-content-detectors-work\/\">How Do AI Content Detectors Work? Answers From a Data Scientist<\/a><\/li>\n<li><a href=\"https:\/\/ahrefs.com\/blog\/whats-the-point-of-ai-detectors\/\">What\u2019s the Point of AI Detectors?<\/a><\/li>\n<li><a href=\"https:\/\/ahrefs.com\/blog\/what-percentage-of-new-content-is-ai-generated\/\">74% of New Webpages Include AI Content (Study of 900k&nbsp;Pages)<\/a><\/li>\n<\/ul>\n<\/div><\/div>\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=\"The limitations of AI detectors\" data-section=\"limitations-of-ai-detectors\">\n<h2><a id=\"post-189302-_b1ulfteyhcll\"><\/a>The limitations of AI detectors<\/h2>\n<\/div><\/div>\n<p>All AI detectors\u2013including the best-performers in this test, Ahrefs AI detector and Copyleaks\u2013share the same core limitations:<\/p>\n<ul>\n<li><strong>Heavily edited or \u201chumanized\u201d AI content may evade detection. <\/strong>Editing AI-generated content disrupts the machine-generated writing patterns AI detectors use to identify AI content.<\/li>\n<li><strong>Free or basic versions often lack advanced features and may have lower accuracy.<\/strong> Regular updates are also required for AI detectors to keep up with new AI writing and bypass techniques. Detection effectiveness can vary based on the AI model or language used.<\/li>\n<li><strong>Detectors may struggle with content written in less common languages or formats. <\/strong>Most detection models are trained on a specific type of content, or a specific language, and content that falls outside of these will be harder to accurately test.<\/li>\n<li><strong>There are not always clear answers.<\/strong> As writing workflows incorporate AI in more subtle, nuanced ways, it becomes harder to answer the question \u201cis this AI-generated?\u201d Is something AI-generated if it was written by a human but copyedited by AI? Or outlined by AI but written by a human? These are increasingly blurry lines.<\/li>\n<\/ul>\n<p>This matters because very few companies publish \u201cpure\u201d AI content. In our research report, <a href=\"https:\/\/ahrefs.com\/blog\/what-percentage-of-new-content-is-ai-generated\/\">The State of AI in Content Marketing<\/a>, we found that only 4.04% of all published content was unedited AI content. Almost all AI content contains some amount of human editing, and that can make AI detection tricky:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"1057\" class=\"wp-image-189306\" src=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-4.png\" srcset=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-4.png 1600w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-4-643x425.png 643w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-4-768x507.png 768w, https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-4-1536x1015.png 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\"><\/p>\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=\"Ethical considerations\" data-section=\"ethical-considerations\">\n<h2><a id=\"post-189302-_euzvn47mx1wf\"><\/a>Ethical considerations<\/h2>\n<\/div><\/div>\n<p>Because of these limitations, it\u2019s important to use AI detectors in a fair, ethical way. I recommend following these best practices for AI content detection, written in conjunction with the data scientists who developed our AI detection model:<\/p>\n<ul>\n<li><strong>Try to learn as much about the detector\u2019s training data as possible,<\/strong> and use models trained on material similar to what you want to&nbsp;test.<\/li>\n<li><strong>Test multiple documents from the same author. <\/strong>A writer\u2019s article was flagged as AI-generated? Run all their past work through the same tool to get a better sense of their base&nbsp;rate.<\/li>\n<li><strong>Never use AI content detectors to make decisions that will impact someone\u2019s career or academic standing.<\/strong> Always use their results in conjunction with other forms of evidence.<\/li>\n<li><strong>Use with a good dose of skepticism.<\/strong> No AI detector is 100% accurate. There will always be false positives.<\/li>\n<\/ul>\n<h2><a id=\"post-189302-_r6tjazagx1mc\"><\/a>Final thoughts<\/h2>\n<p>We used our AI detector to analyze 900,000 web pages published in April 2025 and found that <a href=\"https:\/\/ahrefs.com\/blog\/what-percentage-of-new-content-is-ai-generated\/\">74% included AI-generated content<\/a>.<\/p>\n<p>It\u2019s clear that AI content isn\u2019t going away, so it\u2019s a good idea to use a tool like Ahrefs\u2019 AI detector to understand how AI content impacts your website performance. To get started, head to <a href=\"https:\/\/ahrefs.com\/site-explorer\"><strong>Site Explorer<\/strong><\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>There are tons of AI detectors available. And, while ours is the only one that can also show you any webpage\u2019s backlinks and estimated search traffic, how the page content has changed over time, and how it performs relative to<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":194,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"wp_typography_post_enhancements_disabled":false,"footnotes":""},"categories":[469,390,335],"tags":[],"coauthors":[457],"class_list":["post-189302","post","type-post","status-publish","format-standard","hentry","category-ai-search","category-marketing","category-general-seo","odd"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>The 8 Best AI Detectors, Tested and Compared<\/title>\n<meta name=\"description\" content=\"We put leading AI detectors through their paces, testing their performance against AI-generated, human-written, and hybrid content.\" \/>\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\/best-ai-detectors-tested\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The 8 Best AI Detectors, Tested and Compared\" \/>\n<meta property=\"og:description\" content=\"We put leading AI detectors thropugh their paces, testing their performance against AI-generated, human-written, and hybrid content.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/\" \/>\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:published_time\" content=\"2025-07-02T10:29:41+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-26T14:47:11+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1834\" \/>\n\t<meta property=\"og:image:height\" content=\"1370\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Ryan Law\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@thinking_slow\" \/>\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\\\/best-ai-detectors-tested\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/\"},\"author\":{\"name\":\"Ryan Law\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#\\\/schema\\\/person\\\/e63cf0d276886d0391667a066edafeda\"},\"headline\":\"The 8 Best AI Detectors, Tested and Compared\",\"datePublished\":\"2025-07-02T10:29:41+00:00\",\"dateModified\":\"2025-08-26T14:47:11+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/\"},\"wordCount\":1802,\"publisher\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/the-8-best-ai-detectors-tested-by-ryan-law-marketing.jpg\",\"articleSection\":[\"AI Search\",\"General Marketing\",\"General SEO\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/\",\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/\",\"name\":\"The 8 Best AI Detectors, Tested and Compared\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/word-image-189302-1.jpg\",\"datePublished\":\"2025-07-02T10:29:41+00:00\",\"dateModified\":\"2025-08-26T14:47:11+00:00\",\"description\":\"We put leading AI detectors through their paces, testing their performance against AI-generated, human-written, and hybrid content.\",\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/best-ai-detectors-tested\\\/#primaryimage\",\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/word-image-189302-1.jpg\",\"contentUrl\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/word-image-189302-1.jpg\",\"width\":1834,\"height\":1370},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#website\",\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/\",\"name\":\"SEO Blog by Ahrefs\",\"description\":\"Link Building Strategies &amp; SEO Tips\",\"publisher\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#organization\",\"name\":\"Ahrefs\",\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/ahrefs-logo.png\",\"contentUrl\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/06\\\/ahrefs-logo.png\",\"width\":2048,\"height\":768,\"caption\":\"Ahrefs\"},\"image\":{\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/Ahrefs\\\/\",\"https:\\\/\\\/x.com\\\/ahrefs\",\"https:\\\/\\\/www.linkedin.com\\\/company\\\/ahrefs\\\/\",\"https:\\\/\\\/www.youtube.com\\\/c\\\/ahrefscom\"]},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/#\\\/schema\\\/person\\\/e63cf0d276886d0391667a066edafeda\",\"name\":\"Ryan Law\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/10\\\/ryan-law-pic.jpeg14222399d3ce9bff9501104131dfb0eb\",\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/10\\\/ryan-law-pic.jpeg\",\"contentUrl\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/wp-content\\\/uploads\\\/2023\\\/10\\\/ryan-law-pic.jpeg\",\"caption\":\"Ryan Law\"},\"description\":\"Ryan Law is the Director of Content Marketing at Ahrefs. Ryan has 13 years experience as a writer, content strategist, team lead, marketing director, VP, CMO, and agency founder. He's helped dozens of companies improve their content marketing and SEO, including Google, Zapier, GoDaddy, Clearbit, and Algolia. He's also a novelist and the creator of two content marketing courses.\",\"sameAs\":[\"https:\\\/\\\/ryanlaw.me\\\/\",\"https:\\\/\\\/uk.linkedin.com\\\/in\\\/thinkingslow\",\"https:\\\/\\\/x.com\\\/thinking_slow\"],\"url\":\"https:\\\/\\\/ahrefs.com\\\/blog\\\/author\\\/ryan-law\\\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"The 8 Best AI Detectors, Tested and Compared","description":"We put leading AI detectors through their paces, testing their performance against AI-generated, human-written, and hybrid content.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/","og_locale":"en_US","og_type":"article","og_title":"The 8 Best AI Detectors, Tested and Compared","og_description":"We put leading AI detectors thropugh their paces, testing their performance against AI-generated, human-written, and hybrid content.","og_url":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/","og_site_name":"SEO Blog by Ahrefs","article_publisher":"https:\/\/www.facebook.com\/Ahrefs\/","article_published_time":"2025-07-02T10:29:41+00:00","article_modified_time":"2025-08-26T14:47:11+00:00","og_image":[{"width":1834,"height":1370,"url":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg","type":"image\/jpeg"}],"author":"Ryan Law","twitter_card":"summary_large_image","twitter_creator":"@thinking_slow","twitter_site":"@ahrefs","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/#article","isPartOf":{"@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/"},"author":{"name":"Ryan Law","@id":"https:\/\/ahrefs.com\/blog\/#\/schema\/person\/e63cf0d276886d0391667a066edafeda"},"headline":"The 8 Best AI Detectors, Tested and Compared","datePublished":"2025-07-02T10:29:41+00:00","dateModified":"2025-08-26T14:47:11+00:00","mainEntityOfPage":{"@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/"},"wordCount":1802,"publisher":{"@id":"https:\/\/ahrefs.com\/blog\/#organization"},"image":{"@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/#primaryimage"},"thumbnailUrl":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/the-8-best-ai-detectors-tested-by-ryan-law-marketing.jpg","articleSection":["AI Search","General Marketing","General SEO"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/","url":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/","name":"The 8 Best AI Detectors, Tested and Compared","isPartOf":{"@id":"https:\/\/ahrefs.com\/blog\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/#primaryimage"},"image":{"@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/#primaryimage"},"thumbnailUrl":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg","datePublished":"2025-07-02T10:29:41+00:00","dateModified":"2025-08-26T14:47:11+00:00","description":"We put leading AI detectors through their paces, testing their performance against AI-generated, human-written, and hybrid content.","inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ahrefs.com\/blog\/best-ai-detectors-tested\/#primaryimage","url":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg","contentUrl":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2025\/06\/word-image-189302-1.jpg","width":1834,"height":1370},{"@type":"WebSite","@id":"https:\/\/ahrefs.com\/blog\/#website","url":"https:\/\/ahrefs.com\/blog\/","name":"SEO Blog by Ahrefs","description":"Link Building Strategies &amp; SEO Tips","publisher":{"@id":"https:\/\/ahrefs.com\/blog\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ahrefs.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/ahrefs.com\/blog\/#organization","name":"Ahrefs","url":"https:\/\/ahrefs.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ahrefs.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2023\/06\/ahrefs-logo.png","contentUrl":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2023\/06\/ahrefs-logo.png","width":2048,"height":768,"caption":"Ahrefs"},"image":{"@id":"https:\/\/ahrefs.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/Ahrefs\/","https:\/\/x.com\/ahrefs","https:\/\/www.linkedin.com\/company\/ahrefs\/","https:\/\/www.youtube.com\/c\/ahrefscom"]},{"@type":"Person","@id":"https:\/\/ahrefs.com\/blog\/#\/schema\/person\/e63cf0d276886d0391667a066edafeda","name":"Ryan Law","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2023\/10\/ryan-law-pic.jpeg14222399d3ce9bff9501104131dfb0eb","url":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2023\/10\/ryan-law-pic.jpeg","contentUrl":"https:\/\/ahrefs.com\/blog\/wp-content\/uploads\/2023\/10\/ryan-law-pic.jpeg","caption":"Ryan Law"},"description":"Ryan Law is the Director of Content Marketing at Ahrefs. Ryan has 13 years experience as a writer, content strategist, team lead, marketing director, VP, CMO, and agency founder. He's helped dozens of companies improve their content marketing and SEO, including Google, Zapier, GoDaddy, Clearbit, and Algolia. He's also a novelist and the creator of two content marketing courses.","sameAs":["https:\/\/ryanlaw.me\/","https:\/\/uk.linkedin.com\/in\/thinkingslow","https:\/\/x.com\/thinking_slow"],"url":"https:\/\/ahrefs.com\/blog\/author\/ryan-law\/"}]}},"as_json":null,"json_reviewers":[],"_links":{"self":[{"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/posts\/189302","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/users\/194"}],"replies":[{"embeddable":true,"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/comments?post=189302"}],"version-history":[{"count":0,"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/posts\/189302\/revisions"}],"wp:attachment":[{"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/media?parent=189302"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/categories?post=189302"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/tags?post=189302"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/ahrefs.com\/blog\/wp-json\/wp\/v2\/coauthors?post=189302"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}