GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. Secur3D records 135 monthly visits with -80.5% growth and Contact for Pricing pricing.
AI detection and writing verification built for schools and editors
Detect unauthorized brand, IP and UGC content before it damages revenue
| Dimension / Metric | | |
|---|---|---|
| Official Domain | gptzero.me | secur3d.ai |
| Pricing Model | Freemium, Paid | Contact for Pricing |
| Monthly Visits | 23.25M (23,246,989) | 135 (135) |
| MoM Traffic Delta | +5.7M (+32.5%) | -556 (-80.5%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇨🇦 Canada (100%) |
| Direct Visits / mo | 7.53M | 56 |
| User Rating | 4.1 | 4 |
| 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.
Detect unauthorized brand, IP and UGC content before it damages revenue
Analyzes uploads and published content to flag brand, intellectual property and digital asset risk, targeting the flood of AI-generated and AI-modified material that manual review cannot keep up with.
For marketplaces and platforms, evaluates content as it is uploaded so risky items can be caught before they go live rather than removed after complaints.
Helps studios and developers locate unauthorized copies, lookalikes and derivative works of their IP across marketplaces and UGC platforms.
Verifies signals around ownership and authenticity so brands and creators can substantiate claims about their original designs and digital assets.
Free / Open-sourceAI content detection and a full writing toolkit in one place
Free / Open-sourceAI 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.
Free / Open-sourceDetect, humanize and verify AI content in one place
Free / Open-sourceDetect, humanize and verify AI content in one place
Enterprise AI and plagiarism detection for content integrity
Free / Open-sourceAI detector, plagiarism and content-quality checks in one scan
Free / Open-sourceAI detector, plagiarism and content-quality checks in one scan
Free / Open-sourceMultilingual AI detector with sentence-level insight
Free / Open-sourceMultilingual AI detector with sentence-level insight
Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceDetect AI-generated text and images with benchmark-tested accuracy
Free / Open-sourceAI detector that highlights evidence, not just a score
Free / Open-sourceAI detector that highlights evidence, not just a score
Free / Open-sourceAccuracy-first plagiarism and AI detection for schools, universities, and teams
Free / Open-sourceAccuracy-first plagiarism and AI detection for schools, universities, and teams
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
Free AI content detector that flags machine-written text and helps you rewrite it
Free AI content detector that flags machine-written text and helps you rewrite it
