2 min readFreemium

Originality.ai

Originality.ai is an AI content detector that checks text for AI writing, plagiarism, facts and readability, built for publishers, agencies and schools.

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Is Originality.ai free?
Freemium. Partly. Originality.ai has a free plan, with paid plans for more features or usage.
Category
#AI Detector
Website
originality.ai ↗
Originality.ai logo

What is Originality.ai?

Originality.ai is an AI content detection tool that estimates whether text was written by a human or by models like GPT, Claude and Gemini. It also checks plagiarism, facts, grammar and readability. It is aimed at web publishers, content agencies and educators, and offers a Chrome extension with writing replay plus an API.

Publishers and teachers need to know whether submitted writing is original, but many free detectors are easy to fool with paraphrasing tools. This checker is trained on adversarial data from tools like Quillbot and Grammarly so that edited AI text is still flagged. It bundles plagiarism, fact and readability checks into the same scan, adds full-site scans and team roles, and offers a writing replay so honest writers can prove authorship.

Main Features

  • AI detection for text from leading models such as GPT, Claude, Gemini, DeepSeek and Llama.
  • Plagiarism checker that compares text against existing web content.
  • Fact checker, grammar checker, readability checker and a content quality score.
  • Paste text, upload Word or PDF files, or scan a URL or an entire website.
  • Chrome and Firefox extensions that scan inside Google Docs and replay the writing process.
  • Bulk scans, team roles and shareable reports for editorial teams.
  • API access for adding AI and plagiarism detection to your own apps.
  • Moodle plugin and Google Classroom support for schools.

How to Get Started with Originality.ai

  1. Go to originality.ai and paste up to 2,000 words into the free AI checker.
  2. Run the scan and review the AI likelihood score.
  3. Create an account and subscribe to Pro for plagiarism, fact and readability checks.
  4. Install the Chrome extension to scan directly in Google Docs.

Originality.ai Pricing

The free Basic plan allows 3 AI-only scans per day of up to 2,000 words each. Pro is $14.95 per month ($12.95 billed yearly) for 2,000 credits, where 1 credit covers 100 words, and Enterprise is $179 per month with 15,000 credits and API access.

Who Should Use It?

  • Web publishers checking freelance articles before publishing
  • Content agencies running QA on client deliverables
  • Teachers and schools reviewing student work for AI use
  • Editors who need plagiarism and fact checks in one scan
  • Writers proving authorship with writing replay

Originality.ai Alternatives

Frequently Asked Questions

Is Originality.ai free?

Partly. You get 3 free AI scans per day of up to 2,000 words with no subscription. Plagiarism, fact checking, full-site scans and team features need a paid plan, which starts at $12.95 per month billed yearly.

How accurate is Originality.ai?

The company cites multiple peer-reviewed third-party studies of its detector and trains on text altered by paraphrasing tools. No AI detector is perfect, so treat a score as evidence to review rather than proof.

Does Originality.ai have an API?

Yes. The Enterprise plan includes API access for AI and plagiarism detection, and the tool also offers Chrome and Firefox extensions and a Moodle plugin.

Try Originality.ai