| What it does | Free AI detector with published error rates
| Free AI detector for ChatGPT, GPT-6, Claude and Gemini that scores text and highlights likely AI-generated sentences
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| Stage | Not given
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| Founded | Not given
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| Based in | IT
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| Pricing model | Free
| Free
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| Pricing | No payment required. Free tier allows 10 certification requests per day per IP.
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| Key features | - Calibrated probability scores with published error rates
- Inconclusive verdicts for borderline cases
- Minimum 150 word requirement
- Content Credentials (C2PA) file checking
- Document metadata analysis
- Free human-text certification with downloadable PDF badge
- No signup or account required
- Private processing with no data storage
| - Sentence-level highlighting of AI-like text
- Paste text or upload files (.txt, .docx, .pdf)
- Detects patterns from ChatGPT, GPT-6, Claude, and Gemini
- No sign-up or account required
- Private text processing
- Minimum 50 words required for checking
- Identifies repetitive vocabulary and generic wording patterns
- Works in browser without installation
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| What makes it different | - Published error rates with raw counts and confidence intervals
- Designed to minimize false accusations rather than maximize detections
- Measures ESL (non-native English) writer accuracy separately
- Transparent verdicts: reports inconclusive when unsure instead of guessing
| - Sentence-level highlighting shows exactly which parts appear AI-generated, not just a percentage
- Detects multiple AI models including ChatGPT, Claude, and Gemini
- Optimized for ChatGPT and newer GPT-6 style text
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | Not checked yet ● no change since last check | Not checked yet ● no change since last check |
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| Trust Flow (Majestic) | 2 | 0 |
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| Citation Flow (Majestic) | 13 | 0 |
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| Referring domains (Majestic) | 1 | 0 |
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Cobalynx
ChatZero