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Detecting-AI.com
✓ verifiedFreemium
AI-text detector with sentence-level highlighting and plagiarism checks, aimed at educators, students and content publishers.
69K visits/mo
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GPTZero
✓ verifiedFreemium
AI-content detector aimed at educators, adding plagiarism, grammar and citation checks with claimed high accuracy.
17M visits/mo7.3K saves
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Undetectable AI
✓ verifiedFree trial
AI writing detector and humanizer that rewrites AI-generated text to pass detection tools for students, writers, and businesses.
4.0M visits/mo27K saves
Pricing
Free: $0/mo (5,000 char, 100 detections/day)
Yearly: $7/mo (billed $84/yr, unlimited detections)
Monthly: $14/mo (unlimited detections)
No public pricing
No public pricing
Free trial available
Core features
- ✦Sentence-level AI detection with highlighting
- ✦Probability scoring across GPT, Claude and Gemini
- ✦Plagiarism checker
- ✦AI humanizer and fact checker
- ✦Support for 50+ languages
- ✦Chrome, Moodle, Zapier and API integrations
- ✦Detects AI text from major LLMs (ChatGPT, Claude, Gemini, Llama)
- ✦Sentence-level highlighting with explanations
- ✦Plagiarism and grammar checking
- ✦Hallucination and citation verification
- ✦Authorship/writing-process verification
- ✦Integrations for Chrome, Google Docs, Canvas and API
- ✦AI text detector with sentence-level flagging
- ✦AI humanizer/rewriter that scores as human on detectors
- ✦AI-generated image detector
- ✦Fake PDF and AI audio detectors
- ✦Chrome extension for in-browser use
- ✦Sentence rewriter and word counter utilities
Use cases
- →Checking student work for AI use
- →Verifying originality before publishing
- →Vetting guest posts and submissions
- →Screening resumes and content for authenticity
- →Checking student work for AI-generated content
- →Verifying authentic authorship in classrooms
- →Screening submissions for publishers and recruiters
- →Detecting AI text through the API in other apps
- →Students checking assignments before submission
- →Content writers keeping AI-assisted drafts flag-free
- →Professionals polishing client emails and reports
- →Businesses scaling content output without losing consistency
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