Originality.ai
Checks text for AI-written content and plagiarism for writers, editors, teachers, and publishers.
✓ Verified against originality.ai · Nov 4, 2026Free tier · from $12.95/moWeb · Browser extension
What it does
Originality.ai is an AI tool for checking for plagiarism, checking grammar and spelling and improving SEO. It has a free plan, and paid plans start at $12.95 per month.
Originality.ai is a US-based web app and browser extension that scans text to estimate how much of it was machine-written and to look for plagiarism. A user pastes text, uploads a Word or PDF file, or points the tool at a URL, picks the scans to run, and gets a score back for each one. The detector labels writing as likely AI, human, or a mix of both, highlights the sentences driving the result, and offers follow-up tips so the text can be revised and scanned again. It is aimed at people who have to judge whether writing is someone's own work: editors handling freelance submissions, marketers and publishers checking drafts before they go live, teachers and schools reviewing assignments, and writers who want proof of their process. The extension runs in Chrome, Google Docs, and Firefox, and there are also a Moodle plugin, Google Classroom support, and an API. Plagiarism, grammar, readability, content quality, and fact-checking scans sit alongside the AI detector. The free plan is limited to a one-time allowance of 10K words (100 credits) with no subscription. Paid plans start at $12.95 per month when billed annually and add recurring credits, longer scan history, bulk scanning, file upload, shareable and PDF reports, and team management; the higher enterprise tier adds API access and priority support.
- AI detection with sentence-level highlights
- Plagiarism scanning
- Writing Replay for Google Docs
- Fact and hallucination checker
- Readability and content quality checks
- Chrome and Firefox extensions
- API access on the enterprise tier
Verified facts
Each row links to the page we checked it on.| API | Yes | originality.ai | ✓ Nov 4, 2026 |
|---|---|---|---|
| Free plan | Yes, limited to 10K words (100 credits) one time | originality.ai | ✓ Nov 4, 2026 |
| Headquarters | US | originality.ai | ✓ Nov 4, 2026 |
| Paid plans from | $12.95 per month, billed annually | originality.ai | ✓ Nov 4, 2026 |
| Platforms | Web and browser extension | originality.ai | ✓ Nov 4, 2026 |
| Pricing | Free plan plus paid subscriptions | originality.ai | ✓ Nov 4, 2026 |
What you can do with it
Good at
- Free allowance for trying scans
- Runs inside Chrome, Google Docs, and Firefox
- Bundles AI, plagiarism, and quality checks in one pass
- Team roles, shared reports, and an API on higher tiers
Watch out for
- Free plan is capped at 10K words, one time only
- API access is not included on the entry paid plan
- Writing Replay covers Google Docs rather than every editor
Common questions
- What is Originality.ai used for?
- Originality.ai is used for checking for plagiarism, checking grammar and spelling and improving SEO. On AIToolMaps it ranks #2 of 5 for checking for plagiarism.
- Is Originality.ai free?
- Yes. Originality.ai has a free plan, and paid plans start at $12.95 per month.
- What platforms does Originality.ai run on?
- Originality.ai runs on Web and Browser extension.
- Does Originality.ai have an API?
- Yes. Originality.ai offers an API, so developers can use it from their own code.
- What are the best alternatives to Originality.ai?
- The closest alternatives are Grammarly, GPTZero and QuillBot, which do most of the same jobs. Grammarly is the closest one with a free plan.
Reviews
No reviews yetListing history
- Nov 4, 2026Checked against originality.ai
- Sep 25, 2026Listed