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Originality AI
✓ verifiedPaid
Content-integrity suite pairing an accurate AI-text detector with plagiarism, fact, and readability checks.
2.4M visits/mo13K saves
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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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Smodin
✓ verifiedPaid
AI writing suite combining a humanizer, AI content detector, plagiarism checker, and writing/chat tools for students and writers.
545K visits/mo
Pricing
Pro: $14.95/month (2,000 credits/mo)
Enterprise: $179/month (15,000 credits/mo)
No public pricing
No public pricing
Core features
- ✦AI-content detector with sentence-level highlighting
- ✦Plagiarism checker
- ✦Fact, grammar, and readability checkers
- ✦Chrome extension with writing replay
- ✦Team management and API access
- ✦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 content detector scoring text as AI- vs human-written
- ✦AI humanizer to rewrite AI-generated text more naturally
- ✦Plagiarism checker scanning billions of sources
- ✦AI writer and chat assistant for drafting and research
- ✦Text summarizer, language translator, and rewriter/spinner
- ✦Chrome extension and multi-language interface support
Use cases
- →Detect AI-generated text in submissions
- →Check content for plagiarism
- →Verify facts before publishing
- →Prove authorship of original writing
- →Run content QA at scale for agencies
- →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 and lowering AI-detection scores before submission
- →Writers scanning drafts for plagiarism before publishing
- →Professionals rewriting or translating content quickly
- →Researchers summarizing long articles or papers
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