GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. uPass AI records 10,419 monthly visits with -60.8% growth and Freemium pricing.
AI detection and writing verification built for schools and editors
An undetectable AI humanizer with a built-in multi-detector checker
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gptzero.me | upass.ai |
| Pricing Model | Freemium, Paid | Freemium |
| Monthly Visits | 23.25M (23,246,989) | 10.42K (10,419) |
| MoM Traffic Delta | +5.7M (+32.5%) | -16.15K (-60.8%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇺🇸 United States (39.9%) |
| Direct Visits / mo | 7.53M | 4.19K |
| User Rating | 4.1 | 3.6 |
| 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.
An undetectable AI humanizer with a built-in multi-detector checker
Paste AI-written text and uPass rewrites it with vocabulary and sentence structures that read like a person wrote it, rather than simple synonym swapping.
Check a passage against several popular detectors in a single run instead of submitting it to each service separately, and see where your text stands.
Select Basic, Advanced or Aggressive depending on how much restructuring the text needs while keeping the meaning intact.
The rewriter generates varied phrasing designed to keep output free of matches flagged by plagiarism checkers as well as AI detectors.
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.
Free browser AI humanizer that rewrites AI text to read naturally
Free browser AI humanizer that rewrites AI text to read naturally
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.
Detect, humanize and verify AI content in one place
Detect, humanize and verify AI content in one place
Humanize AI text and check how human it reads
Humanize AI text and check how human it reads
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.
Turn AI-generated text into natural, human-sounding writing
Turn AI-generated text into natural, human-sounding writing
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.
Humanize AI text and check it against major AI detectors
Humanize AI text and check it against major AI detectors
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.
AI detector that highlights evidence, not just a score
AI detector that highlights evidence, not just a score
