GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. Nonbot records 713 monthly visits with -61.5% growth and Free pricing.
AI detection and writing verification built for schools and editors
A free pledge system for declaring and discovering content made by humans
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gptzero.me | nonbot.org |
| Pricing Model | Freemium, Paid | Free |
| Monthly Visits | 23.25M (23,246,989) | 713 (713) |
| MoM Traffic Delta | +5.7M (+32.5%) |
| -1.14K (-61.5%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇺🇸 United States (100%) |
|---|
| Direct Visits / mo | 7.53M | 210 |
|---|
| User Rating | 4.1 | 3.8 |
|---|
| 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.
A free pledge system for declaring and discovering content made by humans
Submit a pledge for your website or a single page and receive a badge snippet you can copy straight into your site.
Sites publicly showing their pledge badge are collected in a browsable directory, so readers can find verified human-made content.
The pledge is a voluntary public statement that your digital or physical content is made by humans, not generated by AI text tools.
A curated news feed covering research and reporting on AI spam, content farms and search quality keeps the pledge in context.
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.
#2Detect, humanize and verify AI content in one place
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
Multilingual AI detector with sentence-level insight
Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero.
Free AI detector with sentence-level insight and a humanizer
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.
SpecialistHumanize AI text and check it against AI detectors
SpecialistCheck plagiarism, detect AI text and polish your writing 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.
Detect, humanize and verify AI content in one place
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
Multilingual AI detector with sentence-level insight
Excels at scanning both text and images with high accuracy, but offers fewer free daily checks than GPTZero.
Free AI detector with sentence-level insight and a humanizer
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.
SpecialistHumanize AI text and check it against AI detectors
SpecialistCheck plagiarism, detect AI text and polish your writing in one place
