Paste your text or upload a file to check for Similarity (plagiarism risk) for free, or add AI Influence detection on paid plans — with sentence-level highlights and an exportable report you can use to revise and explain your work.
No credit card required. Delete your text anytime.
Note: This is a risk-indicator to help you revise — not proof of wrongdoing.
You're not trying to cheat — you're trying to avoid misunderstandings.
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See which sentences read "too AI-like" and revise them to sound like you.
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Spot high-similarity sentences and decide whether to cite, quote, or rewrite.
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Export a report to support a calm, evidence-based conversation.
Three steps, three minutes — before you submit
Word/PDF supported. Simply paste your text or upload your document.
AI Influence: which parts look machine-assisted
Similarity: which parts look too close to other sources
Fix flagged sentences, add citations, strengthen your reasoning, then export a report if needed.
What you'll see (and why it's actually useful)
See exactly which sentences are driving the risk.
AI Influence and Similarity are shown independently to reduce "one score panic."
Download a report for your own records or to support academic discussion. (PDF/HTML)
Works for English, Chinese, and 28+ other languages with language-specific detection.
Sample sentence-level report showing AI influence highlights
Start free with Similarity (plagiarism risk). Add AI detection when you need it.
Try Similarity (plagiarism risk) for free
3 credits per month
Full access for students
50 credits per month
For educators & high volume
200 credits per month
For institutions
Unlimited credits
Pay As You Go — Credits Never Expire
Perfect for occasional use. Buy credits once, use them whenever you need.
Real examples:
Enter word count to see estimate
Questions? Contact us at talk@ppvs.org for group discounts.
No. It's a signal that certain passages read like machine-assisted writing. It's designed to help you revise and strengthen your own voice.
No. Results should be used for revision and discussion, not as a verdict. Many legitimate writing patterns can trigger risk signals.
Over-uniform phrasing, overly polished paragraphs, repetitive structure, unclear paraphrasing, and missing citations. Add your reasoning, show your process, and cite sources.
Storage: Temporarily for processing only
Retention: Deleted within 24 hours
Training use: No, your text is never used for training
Deletion: You can delete your text anytime from your dashboard
1. Rewrite in your natural voice
2. Add citations/quotes where appropriate
3. Add a short "process note" (outline, drafts, sources) if your course allows it
4. Export a report for your own records
Ready to check your paper?
Trusted by students who want to submit responsibly
Across all AuthenAI products, as of Dec 2024
"Sentence-level highlights saved me hours."
— Graduate Student, Taiwan
"It helped me rewrite the sections that sounded 'too smooth'."
— Undergraduate Writer, US