GPTSyncScore records 0 monthly visits with — month-over-month growth and Free pricing. GPTZero records 23,246,989 monthly visits with +32.5% growth and Freemium, Paid pricing.
Measure how much ChatGPT changed your original text
AI detection and writing verification built for schools and editors
| Dimension / Metric | | |
|---|---|---|
| Official Domain | chromewebstore.google.com | gptzero.me |
| Pricing Model | Free | Freemium, Paid |
| Monthly Visits | 0 (0) | 23.25M (23,246,989) |
| MoM Traffic Delta | 0 (—) | +5.7M (+32.5%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (54%) |
| Direct Visits / mo | 0 | 7.53M |
| User Rating | 3.6 | 4.1 |
| Supported Platforms | Browser Extension | Website |
Measure how much ChatGPT changed your original text
Computes a numeric correlation score between your original text and the ChatGPT-generated version so you can quantify how much the content changed.
Paste the original text and the AI-generated text into the extension, then press Calculate for an immediate result.
The resulting score can be copied to the clipboard directly from the extension for use in notes, reports, or messages.
Built to help writers understand and disclose how much AI assistance shaped a given piece of text.
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.
Offers broad multilingual AI detection and text humanization, but lacks GPTZero's detailed deep-scan reporting features.
Offers broad multilingual AI detection and text humanization, but lacks GPTZero's detailed deep-scan reporting features.
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.
Delivers strong fact-checking and comprehensive site-wide plagiarism audits, but has stricter paywalls than GPTZero.
Delivers strong fact-checking and comprehensive site-wide plagiarism audits, but has stricter paywalls than GPTZero.
Provides detailed sentence-level analysis for multilingual text, but lacks GPTZero's broad academic brand recognition.
Provides detailed sentence-level analysis for multilingual text, but lacks GPTZero's broad academic brand recognition.
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.
Free AI detector with sentence-level insight and a humanizer
Free AI detector with sentence-level insight and a humanizer
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.
SpecialistHumanize AI text and check it against AI detectors
SpecialistHumanize AI text and check it against AI detectors
SpecialistCheck plagiarism, detect AI text and polish your writing in one place
SpecialistCheck plagiarism, detect AI text and polish your writing in one place
