| What it does | Free AI checker to detect AI-generated text from ChatGPT, Claude, Grok, Gemini and other language models
| Independent verification for AI agent outcomes
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| Stage | Not given
| Startup
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| Founded | Not given
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| Based in | Not given
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| Pricing model | Free
| Freemium
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| Pricing | Free. No account, no card required. Up to 5,000 words per run for AI detection and up to 3,000 words for plagiarism checking.
| Hobbyist: free forever with 250 checks/month; Pro: $9/month with 2,500 checks/month, $0.01 per extra check
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| Key features | - Analyzes up to 5,000 words per run without account signup
- Detects AI writing from ChatGPT, Claude, Grok, Gemini and other LLMs
- Analyzes public URLs and homepages
- Plagiarism checker with public web overlap detection up to 3,000 words
| - Independent outcome verification with VERIFIED, FAILED, or UNKNOWN status
- First-party adapters for Stripe, GitHub, Linear, Sentry, Resend, and HTTP endpoints
- MCP integration with Claude Code, Cursor, and any MCP host
- GitHub Actions required check that fails on unverified claims
- Audit trail storing claims, evidence, and verdicts separately
- Capability inspection before agents call tools
- Read-only credential access with AES-256-GCM encryption
- Continuous monitoring with watches every 5-10 minutes on Pro plan
- Evidence retention for 7 days on Hobbyist, 1 year on Pro
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| What makes it different | - Independent tool not affiliated with Turnitin, OpenAI or other major platforms
- Text scored in browser with no storage on servers
- Integrated plagiarism checker included as free feature
| - Refuses to guess: returns UNKNOWN rather than false positives when evidence is unreachable
- Neutral gate between agent execution and success verification
- Runs the same way in production as in development
- Never needs write access, only reads authoritative state
- Structured audit trail for debugging and agent evaluation
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 40 ▲ +1 (up) since last check | 2 ● no change since last check |
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| Trust Flow (Majestic) | 13 | 1 |
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| Citation Flow (Majestic) | 26 | 23 |
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| Referring domains (Majestic) | 35 | 14 |
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DetectGPT
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