GPTZero
Alternative option
Writing
Check writing for AI-associated patterns and review sentence-level findings
AI DetectionWriting Review
Originality.ai
Check content for AI patterns and plagiarism, then share scan reports
This service combines AI-generated text detection with plagiarism checking for publishers, agencies, educators, and writers. Its web scanner, browser extension, API, and shareable PDF reports support individual reviews and team workflows, with free credits available to try the service.
Updated
2026-10-26
Platforms
Web / Chrome Extension / API
Freemium
A free account includes 100 credits, and the site lists additional plans for different audiences; purchased credits expire after two years, so check current terms before scaling.
* Pricing is for reference only; see the official site for current pricing.
Originality.ai Key Features
AI Detection
Scan writing for patterns associated with AI-generated content and review the result as one input to an editorial decision.
Plagiarism Scan
Check for matching or potentially copied text alongside AI signals, giving reviewers two distinct checks in one workflow.
Shareable Reports
Save scan history and share a report link or PDF so editors and collaborators can review the same findings.
Extensions and API
Use the browser extension or API to bring checks into publishing and education workflows instead of copying every document manually.
Originality.ai Best For
Web publishers
Review contributed articles for AI signals and matching text before editing or approving content for publication.
Content agencies
Run repeatable checks across client deliverables and share report links or PDFs with editors and stakeholders.
Educators
Combine AI detection and plagiarism checks when reviewing writing, while treating both signals as prompts for discussion.
Pros
- AI and plagiarism checks are available in one service
- Reports can be shared as links or downloadable PDFs
- Browser and API options support different review workflows
Considerations
- Free use is limited to a stated credit allowance
- Detection scores can misclassify human or AI-assisted writing
Originality.ai Quick Start and Practical Tips
Quick start
- 1
Scan one representative article first, then review its AI-detection and plagiarism findings as separate checks.
- 2
Save or share the report link or PDF with an editor so everyone can review the same scan.
- 3
Install the Chrome extension to check text directly from a supported browser workflow.
Pro tip
Core tip: Keep the AI and plagiarism findings separate. Do inspect each result for the question it answers; don't treat an AI score as a similarity match or a plagiarism match as proof of AI use. When handing a report to an editor, include the original draft and review context rather than forwarding a score alone.
Frequently asked questions
01Do AI and plagiarism checks answer the same question?
No. AI detection looks for patterns associated with generated text, while plagiarism checking looks for matching material. Review the two findings independently and verify relevant sources before deciding what a document needs.
02Can a scan identify who wrote each passage?
A scan report can summarize text findings, but it is not a complete record of authorship or editing history. Use drafts, contributor notes, and direct clarification when you need to understand how a passage was produced.
03What should I do if a human draft is flagged?
Treat the result as a prompt to review, not as a verdict. Check the highlighted text against the author's drafts and sources, then ask for context; do not assume that a flagged passage was generated or copied.
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