| What it does | Free AI checker that estimates text probability as AI-generated with sentence-level analysis
| Prove a human made it
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| Stage | Not given
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| Founded | Not given
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| Based in | US
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| Pricing model | Free
| Freemium
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| Pricing | $0 - completely free with no ads, paywall, or sign-up required. Unlimited checks with up to 10,000 words per check and sentence-level signals included.
| Free: 3 certificates a month. Pro: $19 per month for unlimited certificates and two registered computers. Studio: $39 per month for everything in Pro plus studio branding on certificates and five registered computers.
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| Key features | - AI probability score on 0-100 scale
- Sentence-level AI signal analysis
- Supports up to 10,000 words per check
- Detects text from ChatGPT, Gemini, Claude, DeepSeek and other AI models
- No sign-up required to use
- Check history saved for signed-in users
- Supports English and Spanish text
- Ranked #1 on GEDE Benchmark
- Minimum 80-word requirement for meaningful results
- No ads or paywall
| - Records file growth between saves without opening file contents
- Tracks which applications were in front during work
- Counts pen strokes and monitors pen rhythm
- Generates signed, timestamped certificates clients verify in browser
- Works with any drawing app including Photoshop, Clip Studio Paint, Figma, and Krita
- Supports writing apps: Word, Pages, Scrivener, Ulysses, Obsidian
- Works with external tablets: Wacom, Huion, XP-Pen, Cintiq
- Browser-based Procreate file sealing without installation at drawdog.art/seal
- Detects desktop AI apps by name: ChatGPT, Claude, Midjourney, Ollama, ComfyUI and 130 total app recognitions
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| What makes it different | - Reports probability instead of certainty, with sentence-level context for review
- Provides full results free with no paywalled features
- Ranked #1 on independent GEDE detection benchmark
- Allows unlimited checks with no usage limits
- Model-agnostic detection across all major AI platforms
| - Never looks inside files, only records process
- Certificate stays valid forever, even if subscription is cancelled
- Checking certificates is always free, no account needed
- Discloses AI tool usage honestly instead of pretending it wasn't used
- Uses third-party RFC 3161 timestamp authority so time is independently verified
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | 75 ● no change since last check | 1 ▲ +1 (up) since last check |
| Trust Flow (Majestic) | 55 | 0 |
| Citation Flow (Majestic) | 48 | 19 |
| Referring domains (Majestic) | 2309 | 24 |