GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. GrammarBot records 158 monthly visits with -92.8% growth and Free pricing.
AI detection and writing verification built for schools and editors
Free in-browser analyzer for grammar, readability, tone and SEO
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gptzero.me | grammarbot.app |
| Pricing Model | Freemium, Paid | Free |
| Monthly Visits | 23.25M (23,246,989) | 158 (158) |
| MoM Traffic Delta | +5.7M (+32.5%) | -2.04K (-92.8%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇺🇸 United States (79.7%) |
| Direct Visits / mo | 7.53M | 63 |
| User Rating | 4.1 | 4.2 |
| Supported Platforms | Website | Website |
AI detection and writing verification built for schools and editors
Paste text or upload a document and get an overall AI probability score plus a sentence-by-sentence breakdown of which parts look machine-written.
Flags AI text from major model families including ChatGPT, Gemini, Claude, Llama, and others, rather than training for a single model.
A Chrome extension and Google Docs add-on bring scanning into Gmail, Docs, Classroom, and other surfaces you already work in.
Checks content for copied passages from outside sources so you can separate AI-generation questions from originality questions.
Free in-browser analyzer for grammar, readability, tone and SEO
Detects errors, awkward phrasing and style issues with suggestions driven by the open-source LanguageTool engine.
Flesch Reading Ease, Flesch-Kincaid, SMOG, Coleman-Liau and Dale-Chall are calculated together and shown with grade-level interpretation.
Flags whether text reads as academic, professional or casual, and reports the emotional sentiment so you can match your audience.
Weighs keyword density, content length, semantic completeness and readability against SERP averages for your target query.
Paraphrase, proofread and summarize text with an AI writing workspace
Paraphrase, proofread and summarize text with an AI writing workspace
AI content detection and a full writing toolkit in one place
AI content detection and a full writing toolkit in one place
SpecialistCombines AI detection with professional human proofreading and citation tools, but functions primarily as an editing service.
SpecialistCombines AI detection with professional human proofreading and citation tools, but functions primarily as an editing service.
SpecialistCombines AI detection with robust text humanization tools, but focuses more heavily on rewriting than pure verification.
SpecialistCombines AI detection with robust text humanization tools, but focuses more heavily on rewriting than pure verification.
Provides robust enterprise-grade content integrity and cross-media detection, but can be more expensive for individual users.
Provides robust enterprise-grade content integrity and cross-media detection, but can be more expensive for individual users.
AI detector, plagiarism and content-quality checks in one scan
AI detector, plagiarism and content-quality checks in one scan
A storytelling toolkit that checks your grammar and coaches your craft
A storytelling toolkit that checks your grammar and coaches your craft
Multilingual AI detector with sentence-level insight
Multilingual AI detector with sentence-level insight
Write bolder, clearer prose with instant readability and grammar feedback
Write bolder, clearer prose with instant readability and grammar feedback
Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero.
Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero.
AI detector that highlights evidence, not just a score
AI detector that highlights evidence, not just a score
SpecialistTailors detection specifically for academic institutions and LMS integrations, but is less optimized for casual web users.
SpecialistTailors detection specifically for academic institutions and LMS integrations, but is less optimized for casual web users.
