{"id":14929,"date":"2026-03-30T21:21:26","date_gmt":"2026-03-30T21:21:26","guid":{"rendered":"https:\/\/undetectable.ai/blog\/?p=14929"},"modified":"2026-04-02T13:26:43","modified_gmt":"2026-04-02T13:26:43","slug":"grubby-ai-review","status":"publish","type":"post","link":"https:\/\/undetectable.ai/blog\/grubby-ai-review\/","title":{"rendered":"Grubby AI Review: Our Honest Verdict"},"content":{"rendered":"\n<p>The AI writing world is growing at a massive rate, and with so much money moving through the industry, it is no surprise that hundreds of new tools are popping up every single week.<\/p>\n\n\n\n<p>Right behind the generators is a new wave of AI humanizers, each promising to make your robotic drafts bypass every detector on the planet.<\/p>\n\n\n\n<p>In fact, more people than ever are searching for ways to make their digital content sound less like a machine and more like a person. But do these tools actually do what they say on the tin?<\/p>\n\n\n\n<p>The only real way to find out is to put them through the wringer. In this review, we are taking a close look at Grubby AI, a tool designed to rewrite your text and give it a more natural feel.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"437\" src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657-1024x437.jpg\" alt=\"Screenshot of Grubby AI review\" class=\"wp-image-14934\" title=\"\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657-1024x437.jpg 1024w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657-300x128.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657-768x328.jpg 768w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657-1536x656.jpg 1536w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657-18x8.jpg 18w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-review-e1775136013657.jpg 1600w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure><\/div>\n\n\n<p>We will explore its features, check out the pricing, and most importantly, test its results against the toughest detectors out there to see if it can really hide the tracks of a bot.<\/p>\n\n\n\n<p>Whether you are a student, a marketer, or just a curious writer, here is our honest verdict on whether Grubby AI is a helpful sidekick or just another overhyped trend.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"has-text-align-center\"><strong>Key Takeaways<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Testing Results: <\/strong>Out of 3 major AI detectors, it bypassed 1 (GPTZero). Originality AI and Undetectable AI still flagged the content as AI-written<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Grubby AI humanizer is designed to rewrite AI-generated content to sound more natural<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The free plan offers 300 words\/month. Paid plans start at $7.99\/month<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Best suited for plain English content, basic emails, and short essays<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>No built-in AI detection feature, strictly a humanization tool<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">What Is the Grubby AI Humanizer?<\/h2>\n\n\n\n<p>Grubby AI Humanizer is an online tool that rewrites AI-generated content so it sounds more natural and human-like.&nbsp;<\/p>\n\n\n\n<p>Its main purpose is to help users bypass AI detectors.&nbsp;<\/p>\n\n\n\n<p>If you\u2019re a student, writer, or marketer, you can take content from ChatGPT or any other AI tool, and humanize from Grubby AI Humanizer to get a smoother, more natural version of your text.<\/p>\n\n\n\n<p>The tool is promoted as an <strong><em>\u201cAI detection remover,\u201d<\/em><\/strong> and is designed mainly for people who don\u2019t want their work flagged as AI-written.&nbsp;<\/p>\n\n\n\n<p>Unlike some competitors, Grubby AI Humanizer doesn\u2019t include an AI detector, it only focuses on rewriting.<\/p>\n\n\n\n<p>There\u2019s not much public information about the company. Trustpilot lists Grubby.ai as U.S.-based, and a founder named <em>Brad<\/em> has been mentioned in online forums.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-1024x488.avif 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-300x143.avif 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-768x366.avif 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-18x9.avif 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots.avif 1177w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-1024x488.webp 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-300x143.webp 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-768x366.webp 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-18x9.webp 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots.webp 1177w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-1024x488.jpg\" height=\"488\" width=\"1024\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-1024x488.jpg 1024w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-300x143.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-768x366.jpg 768w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots-18x9.jpg 18w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-trustpilots.jpg 1177w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" class=\"wp-image-14935 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<p>Grubby AI claims to support 30+ languages, but it performs best in English. In testing, for example, French text was often translated into English rather than rewritten in French.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text.avif 718w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text-300x107.avif 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text-18x6.avif 18w\" sizes=\"auto, (max-width: 718px) 100vw, 718px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text.webp 718w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text-300x107.webp 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text-18x6.webp 18w\" sizes=\"auto, (max-width: 718px) 100vw, 718px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text.jpg\" height=\"255\" width=\"718\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text.jpg 718w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text-300x107.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-frech-text-18x6.jpg 18w\" sizes=\"auto, (max-width: 718px) 100vw, 718px\" class=\"wp-image-14936 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\">Core Features Overview<\/h3>\n\n\n\n<p>The main feature of Grubby AI Humanizer is<strong> AI Text Rewriting<\/strong>.<\/p>\n\n\n\n<p>The tool changes words, sentence structure, tone, and flow in a way that the text sounds natural.&nbsp;<\/p>\n\n\n\n<p>Reviews show that it works well for plain English content and removes the typical<strong> \u201cAI-style\u201d<\/strong> feel.<\/p>\n\n\n\n<p>Grubby AI also offers some extra tools, mainly for students:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-1024x454.avif 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-300x133.avif 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-768x341.avif 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-18x8.avif 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students.avif 1118w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-1024x454.webp 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-300x133.webp 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-768x341.webp 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-18x8.webp 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students.webp 1118w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-1024x454.jpg\" height=\"454\" width=\"1024\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-1024x454.jpg 1024w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-300x133.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-768x341.jpg 768w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students-18x8.jpg 18w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-tools-for-students.jpg 1118w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" class=\"wp-image-14937 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Summarizer:<\/strong> Produces short, clear summaries that highlight the main points of essays and articles.<br><\/li>\n\n\n\n<li><strong>Smart Notes: <\/strong>Breaks down long text into organized bullet-point notes with headings, making it easier to study.<br><\/li>\n\n\n\n<li><strong>Quizzes: <\/strong>Generates multiple-choice and true\/false questions directly from the text. The questions are clear, relevant, and can help teachers save preparation time.<br><\/li>\n\n\n\n<li><strong>Flashcards: <\/strong>Builds Q&amp;A flashcards. Each card highlights one important point which makes it simple to review and memorize.&nbsp;<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Grubby AI Humanizer Pricing and Plans<\/h3>\n\n\n\n<p>Let\u2019s take a look at Grubby AI Humanizer pricing and plans:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Plan<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Words\/ Month<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Monthly Price<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Annual Price<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Features Included<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Free<\/td><td class=\"has-text-align-center\" data-align=\"center\">300<\/td><td class=\"has-text-align-center\" data-align=\"center\">$0<\/td><td class=\"has-text-align-center\" data-align=\"center\">$0<\/td><td class=\"has-text-align-center\" data-align=\"center\">Humanization only (no card required)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Essential<\/td><td class=\"has-text-align-center\" data-align=\"center\">7,500<\/td><td class=\"has-text-align-center\" data-align=\"center\">$7.99<\/td><td class=\"has-text-align-center\" data-align=\"center\">$47.88<\/td><td class=\"has-text-align-center\" data-align=\"center\">All features: Summarizer, Smart Notes, Quizzes, Flashcards<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Pro<\/td><td class=\"has-text-align-center\" data-align=\"center\">15,000<\/td><td class=\"has-text-align-center\" data-align=\"center\">$14.99<\/td><td class=\"has-text-align-center\" data-align=\"center\">$179.88<\/td><td class=\"has-text-align-center\" data-align=\"center\">All features included<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Business<\/td><td class=\"has-text-align-center\" data-align=\"center\">30,000<\/td><td class=\"has-text-align-center\" data-align=\"center\">$29.99<\/td><td class=\"has-text-align-center\" data-align=\"center\">$359.88<\/td><td class=\"has-text-align-center\" data-align=\"center\">All features included<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Enterprise<\/td><td class=\"has-text-align-center\" data-align=\"center\">60,000<\/td><td class=\"has-text-align-center\" data-align=\"center\">$59.99<\/td><td class=\"has-text-align-center\" data-align=\"center\">$719.88<\/td><td class=\"has-text-align-center\" data-align=\"center\">All features included<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>In short,<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Free plan <\/strong>available with 300 words\/month.<\/li>\n\n\n\n<li><strong>Paid plans<\/strong> start at around $8\/month (annual billing) and go up to $60\/month depending on word limits.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">How Grubby AI Humanizer Works<\/h2>\n\n\n\n<p>We have tested Grubby AI Humanizer against three different AI detectors to check if its claims are true or not.<\/p>\n\n\n\n<p>Before sharing our own results, let\u2019s first look at what independent testers have found.<\/p>\n\n\n\n<p>Third-party reviews suggest that Grubby AI Humanizer delivers mixed performance. For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Originality AI: <\/strong>Even after running text through Grubby AI, the score only dropped slightly, from 100% AI to 98% AI. It was still flagged as machine-generated.<br><\/li>\n\n\n\n<li><strong>Writer: <\/strong>The rewritten text was rated as 100% human, compared to just 85% for the original draft.<br><\/li>\n\n\n\n<li><strong>ZeroGPT: <\/strong>The AI score fell from 100% down to just 9.4%, meaning the text almost escaped detection.<br><\/li>\n<\/ul>\n\n\n\n<p>This means Grubby AI Humanizer can sometimes bypass detectors like ZeroGPT or Writer.<\/p>\n\n\n\n<p><strong>Our Own Test<\/strong><\/p>\n\n\n\n<p>Here\u2019s the process we followed to test Grubby AI Humanizer ourselves:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Generated a sample paragraph with ChatGPT.<\/li>\n<\/ol>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph.avif 822w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-300x174.avif 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-768x445.avif 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-18x10.avif 18w\" sizes=\"auto, (max-width: 822px) 100vw, 822px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph.webp 822w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-300x174.webp 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-768x445.webp 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-18x10.webp 18w\" sizes=\"auto, (max-width: 822px) 100vw, 822px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph.jpg\" height=\"476\" width=\"822\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph.jpg 822w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-300x174.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-768x445.jpg 768w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-generate-sample-paragraph-18x10.jpg 18w\" sizes=\"auto, (max-width: 822px) 100vw, 822px\" class=\"wp-image-14938 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<p>2. Checked it against three detectors for baseline testing: Originality.ai, GPTZero, and Undetectable AI.<\/p>\n\n\n\n<p>3. Ran the same paragraph through Grubby\u2019s <strong>\u201cHumanize\u201d <\/strong>function.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-1024x354.avif 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-300x104.avif 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-768x265.avif 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-18x6.avif 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph.avif 1144w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-1024x354.webp 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-300x104.webp 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-768x265.webp 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-18x6.webp 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph.webp 1144w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-1024x354.jpg\" height=\"354\" width=\"1024\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-1024x354.jpg 1024w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-300x104.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-768x265.jpg 768w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph-18x6.jpg 18w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ran-paragraph.jpg 1144w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" class=\"wp-image-14939 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<p>4. Re-tested the humanized version with the same detectors.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version.avif 459w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version-256x300.avif 256w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version-10x12.avif 10w\" sizes=\"auto, (max-width: 459px) 100vw, 459px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version.webp 459w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version-256x300.webp 256w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version-10x12.webp 10w\" sizes=\"auto, (max-width: 459px) 100vw, 459px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version.jpeg\" height=\"537\" width=\"459\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version.jpeg 459w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version-256x300.jpeg 256w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-re-test-humanized-version-10x12.jpeg 10w\" sizes=\"auto, (max-width: 459px) 100vw, 459px\" class=\"wp-image-14940 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<p><strong>The Results<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Detector<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Before Humanize<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>After Grubby Humanize<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Undetectable AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">99% AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">99% AI (no change)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Originality AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">100% AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">0% AI (passed)<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">GPTZero<\/td><td class=\"has-text-align-center\" data-align=\"center\">100% AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">99% AI (still flagged)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Originality.ai<\/strong>: The score dropped slightly but was still flagged as AI-generated.<\/li>\n\n\n\n<li><strong>GPTZero<\/strong>: This is where Grubby AI Humanizer performed best. The text went from fully flagged to passing as 100% human.<\/li>\n\n\n\n<li><a href=\"https:\/\/undetectable.ai\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>Undetectable AI<\/strong><\/a>: No difference. The content stayed flagged.<\/li>\n<\/ul>\n\n\n\n<p>For users who need dependable results, we recommend pairing two of our own tools:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/undetectable.ai\/\" target=\"_blank\" rel=\"noreferrer noopener\">Undetectable AI Detector<\/a>: Quickly shows whether your text still looks AI-generated.<br><\/li>\n\n\n\n<li><a href=\"https:\/\/undetectable.ai\/\" target=\"_blank\" rel=\"noreferrer noopener\">Undetectable AI Humanizer<\/a>: Rewrites flagged sections until your content reads naturally and passes top detectors.<\/li>\n<\/ul>\n\n\n\n<p>Using these together gives you a more trustworthy way to check, fix, and finalize your content so it appears fully human.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Grubby AI Pros and Cons<\/h3>\n\n\n\n<p>Here are the pros and cons of Grubby AI Humanizer:<\/p>\n\n\n\n<p><strong>Pros<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Very easy to use with a clean, beginner-friendly interface.<\/li>\n\n\n\n<li>Outputs flow more naturally and feel \u201cless robotic.\u201d<\/li>\n\n\n\n<li>Improves readability for plain English content.<\/li>\n\n\n\n<li>Affordable: free tier available. Paid plans start under $8\/month for thousands of words.<\/li>\n\n\n\n<li>Extra tools (Summarizer, Smart Notes, Quizzes, Flashcards) add real value beyond rewriting.<\/li>\n\n\n\n<li>Often bypasses basic AI and plagiarism checkers, helping with simple detection tests.<\/li>\n\n\n\n<li>Works well for basic tasks like emails, short essays, and marketing copy.<\/li>\n<\/ul>\n\n\n\n<p><strong>Cons<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Claims 30+ languages but usually translates non-English text into English before rewriting.<\/li>\n\n\n\n<li>Struggles with complex or highly technical content, manual editing often needed.<\/li>\n\n\n\n<li>Results are not guaranteed to bypass all AI detectors.<\/li>\n\n\n\n<li>The company admits in its FAQ that outputs may still get flagged.<\/li>\n\n\n\n<li>Customer support can be slow, and product updates are infrequent.<\/li>\n\n\n\n<li>No refund policy if text still gets flagged.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Grubby AI vs. Competitors<\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong>Tool<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Function<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Humanization Quality<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Extra Features<\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Pricing<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Grubby AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">Humanizer<\/td><td class=\"has-text-align-center\" data-align=\"center\">Good for plain English, removes \u201cAI feel\u201d<\/td><td class=\"has-text-align-center\" data-align=\"center\">Summarizer, Smart Notes, Quizzes, Flashcards<\/td><td class=\"has-text-align-center\" data-align=\"center\">Free + paid plans from ~$8\/mo<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Quillbot<\/td><td class=\"has-text-align-center\" data-align=\"center\">Paraphraser + limited detector<\/td><td class=\"has-text-align-center\" data-align=\"center\">Decent paraphrasing, less nuanced than Grubby<\/td><td class=\"has-text-align-center\" data-align=\"center\">Grammar checker, citation generator<\/td><td class=\"has-text-align-center\" data-align=\"center\">Free + premium plans from ~$10\/mo<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Toolsmart\u2019s Humanize AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">Humanizer<\/td><td class=\"has-text-align-center\" data-align=\"center\">Similar to Grubby, plain rewrite focus<\/td><td class=\"has-text-align-center\" data-align=\"center\">None notable<\/td><td class=\"has-text-align-center\" data-align=\"center\">Low-cost plans<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Undetectable AI<\/td><td class=\"has-text-align-center\" data-align=\"center\">Humanizer + Detector<\/td><td class=\"has-text-align-center\" data-align=\"center\">High-quality rewriting (100% accuracy of detector)<\/td><td class=\"has-text-align-center\" data-align=\"center\">Detection + Humanization in one<\/td><td class=\"has-text-align-center\" data-align=\"center\">Paid plans<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Can Grubby AI Detect AI-Edited or Paraphrased Text?<\/h3>\n\n\n\n<p><strong><em>No. <\/em><\/strong>Grubby AI is strictly a humanizer, not a detector. It has no feature to analyze or label input as AI-written. Its focus is strictly on rewriting text to make it sound more natural.<\/p>\n\n\n\n<p>If you input text that has already been edited or paraphrased by another AI tool, Grubby AI won\u2019t identify it.<\/p>\n\n\n\n<p>Instead, it will simply rewrite the text again.<\/p>\n\n\n\n<p>But if you\u2019re looking for the detection and humanization feature at one place, you can use Undetectable AI. It includes both detection and rewriting.\u00a0<\/p>\n\n\n\n<p>Independent tests from ZDNet have shown that its detector can reliably identify 100% of paraphrased AI-generated content.&nbsp;<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet.avif 408w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet-258x300.avif 258w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet-10x12.avif 10w\" sizes=\"auto, (max-width: 408px) 100vw, 408px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet.webp 408w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet-258x300.webp 258w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet-10x12.webp 10w\" sizes=\"auto, (max-width: 408px) 100vw, 408px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet.jpg\" height=\"474\" width=\"408\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet.jpg 408w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet-258x300.jpg 258w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-ZDNet-10x12.jpg 10w\" sizes=\"auto, (max-width: 408px) 100vw, 408px\" class=\"wp-image-14941 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<p>For example, if someone used ChatGPT to create text, ran it through QuillBot, and then processed it again with Grubby AI Humanizer, Undetectable AI would still flag it as AI-generated.<\/p>\n\n\n\n<p class=\"has-text-align-center\">Try this for detecting AI-edited and paraphrased text with accuracy.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Grubby AI Humanizer vs. Undetectable AI Humanizer<\/h2>\n\n\n\n<p>Unlike Grubby AI Humanizer, Undetectable AI\u2019s <a href=\"https:\/\/undetectable.ai\/\" target=\"_blank\" rel=\"noreferrer noopener\">AI Humanizer<\/a> delivers several major advantages that make it more powerful and reliable.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Backed by a Best-in-Class Detector<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Undetectable AI detects 100% of paraphrased AI content in independent tests. It automatically rewrites flagged text to ensure it passes safely. The tools also offer a satisfaction guarantee.&nbsp;<\/li>\n\n\n\n<li>Grubby AI offers no detection, no safeguards, and no refund policy.<\/li>\n<\/ul>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><strong>Broader Language Support<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Grubby AI claims 30+ languages but mostly works in English.<\/li>\n\n\n\n<li>Undetectable.ai supports dozens of languages including Arabic, Chinese, and German.<\/li>\n<\/ul>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li><strong>Privacy and Customer Support<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Undetectable ai offers bank-grade encryption that protects all uploads. 24\/7 live support ensures fast, reliable help.<\/li>\n\n\n\n<li>Grubby AI users report:\n<ul class=\"wp-block-list\">\n<li>Slow or unresponsive customer service.<\/li>\n\n\n\n<li>Limited updates and troubleshooting options.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<ol start=\"4\" class=\"wp-block-list\">\n<li><strong>Proven Performance and Global Trust<\/strong><\/li>\n<\/ol>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Undetectable AI is trusted by 20+ million users worldwide. It\u2019s also featured in Forbes, Business Insider, and other major outlets.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><picture><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-1024x442.avif 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-300x129.avif 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-768x331.avif 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-18x8.avif 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance.avif 1328w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/avif\"><source srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-1024x442.webp 1024w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-300x129.webp 300w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-768x331.webp 768w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-18x8.webp 18w,https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance.webp 1328w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" type=\"image\/webp\"><img src=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-1024x442.jpg\" height=\"442\" width=\"1024\" srcset=\"https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-1024x442.jpg 1024w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-300x129.jpg 300w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-768x331.jpg 768w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance-18x8.jpg 18w, https:\/\/undetectable.ai/blog\/wp-content\/uploads\/2025\/10\/grubby-ai-proven-performance.jpg 1328w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" class=\"wp-image-14942 sp-no-webp\" alt=\"\" loading=\"lazy\" decoding=\"async\"  > <\/picture><\/figure><\/div>\n\n\n<ul class=\"wp-block-list\">\n<li>Grubby AI is newer, with:\n<ul class=\"wp-block-list\">\n<li>Fewer independent reviews.<\/li>\n\n\n\n<li>Less proof of long-term reliability.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>Use our AI Detector and Humanizer right in the widget below!<\/p>\n\n\n\n<div id=\"uai-widget\" data-affiliate-link=\"https:\/\/undetectable.ai\/?_by=hi4km\"><script>var js = document.createElement(\"script\");js.async = true;js.src = \"https:\/\/widget.undetectable.ai\/js\/widget-loader.js?t=\"+Date.now();document.getElementsByTagName(\"head\")[0].appendChild(js);<\/script><\/div>\n\n\n\n<h2 class=\"wp-block-heading\">FAQs About Grammarly AI Checker<\/h2>\n\n\n<div id=\"rank-math-faq\" class=\"rank-math-block\">\n<div class=\"rank-math-list \">\n<div id=\"faq-question-1759751178158\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">How much does Grubby AI cost?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>The free plan allows ~300 words\/month. Paid plans start at $7.99\/month and go up to $59.99\/month for 60,000 words.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1759751188621\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Does Grubby AI bypass all AI detectors?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>No. It may lower AI scores, but tools like Undetectable AI, and Originality AI can still flag its output.<\/p>\n\n<\/div>\n<\/div>\n<div id=\"faq-question-1759751197360\" class=\"rank-math-list-item\">\n<h3 class=\"rank-math-question \">Can Grubby AI detection results be wrong?<\/h3>\n<div class=\"rank-math-answer \">\n\n<p>Yes. It can produce awkward phrasing or errors, especially with complex text, and still get flagged by detectors.<\/p>\n\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>In this Grubby AI review, we\u2019ve found that Grubby AI humanizer is a decent entry-level tool for basic content humanization.<\/p>\n\n\n\n<p>It works well for simple tasks like emails, short essays, and marketing copy, especially when you&#8217;re working with plain English text.<\/p>\n\n\n\n<p>However, this Grubby AI review also shows big problems.&nbsp;<\/p>\n\n\n\n<p>Its results are not always the same on AI detectors, it does not fully support many languages, and it has no built-in detector.&nbsp;<\/p>\n\n\n\n<p>The fact that it doesn\u2019t offer refunds is also a risk for users who want guaranteed results.<\/p>\n\n\n\n<p>If you want something stronger and more trustworthy, use Undetectable AI.&nbsp;<\/p>\n\n\n\n<p>It comes with the best AI detector that catches 100% of paraphrased content, a powerful humanizer that beats major detectors, and 24\/7 customer support. It gives you everything Grubby AI is missing.<\/p>\n\n\n\n<p>Try <a href=\"https:\/\/undetectable.ai\" target=\"_blank\" rel=\"noreferrer noopener\">Undetectable AI<\/a> today and see why millions of people trust it as the best AI humanization solution.<\/p>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":15,"featured_media":22030,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"footnotes":""},"categories":[5],"tags":[],"class_list":["post-14929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-reviews"],"_links":{"self":[{"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/posts\/14929","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/comments?post=14929"}],"version-history":[{"count":5,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/posts\/14929\/revisions"}],"predecessor-version":[{"id":22027,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/posts\/14929\/revisions\/22027"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/media\/22030"}],"wp:attachment":[{"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/media?parent=14929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/categories?post=14929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/undetectable.ai/blog\/wp-json\/wp\/v2\/tags?post=14929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}