GPTZero records 23,246,989 monthly visits with +32.5% month-over-month growth and Freemium, Paid pricing. Validoe records 6,165 monthly visits with -31.3% growth and Paid pricing.
AI detection and writing verification built for schools and editors
AI-assisted Pokemon card authentication, pre-grading and re-grading
| Dimension / Metric | ||
|---|---|---|
| Official Domain | gptzero.me | validoe.com |
| Pricing Model | Freemium, Paid | Paid |
| Monthly Visits | 23.25M (23,246,989) | 6.17K (6,165) |
| MoM Traffic Delta | +5.7M (+32.5%) | -2.81K (-31.3%) |
| Primary Market & Share | 🇺🇸 United States (54%) | 🇺🇸 United States (96.1%) |
| Direct Visits / mo | 7.53M | 2.45K |
| User Rating | 4.1 | 3.9 |
| 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.
AI-assisted Pokemon card authentication, pre-grading and re-grading
Submit a card, slab, booster pack or sealed box for review by a global team of authenticators, supported by AI. You get an Authentic or Replica verdict with the evidence behind it, rather than a score alone.
For raw cards and unopened packs, Validoe assesses condition and grade potential before you commit to an official grading submission, helping you judge whether a card is worth the time and cost.
Already-slabbed cards can be re-assessed to flag possible mislabeling and to surface grade or value potential you may have missed - useful when evaluating a slab on the secondary market.
Capture card images in the app, submit for review, and choose a turnaround. Reports can be returned in as little as ten minutes, with watermarked images and written commentary from the authenticator.
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
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 / Open-sourceAI detector that highlights evidence, not just a score
Free / Open-sourceAI 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
Free / Open-sourceScan sports cards and TCGs to get instant values and manage your collection
Free / Open-sourceScan sports cards and TCGs to get instant values and manage your collection
