Originality.ai
AI and plagiarism checker for publishers, agencies and content teams.
Updated · AppBreakup editorial · Web, Browser extension
Is Originality.ai free?
Free plan, plus paid plans
- Starting price:
- $12.95/month billed annually (Pro); $14.95 monthly
- Free plan:
- Yes, 10K words one time
Checked on Originality.ai's site Nov 8, 2026
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About Originality.ai
Originality.ai is an AI-content and plagiarism checker aimed at people who buy or publish written content: website owners, SEO agencies, editors and marketing teams. A single scan can report the chance a text was AI-written, find copied passages, score readability and grammar, and flag claims that may be false. It runs on credits, where one credit covers 100 words; a free tier gives a small one-time allowance, the Pro plan adds a monthly batch of credits, and the Enterprise plan adds API access and a year of scan history. Extensions for Chrome, Firefox and Google Docs let you scan text where you write it and watch a replay of how a document was produced, and there is a Moodle plugin for schools. It is web-based, priced in US dollars, and leans more toward publishing workflows than classroom use.
Best for: Publishers and SEO agencies checking freelance content for AI writing and plagiarism.
Originality.ai pricing (checked Nov 8, 2026)
Each line is quoted from Originality.ai's own site, with the page it came from.
| Plan or term | What it says | Checked | Source |
|---|---|---|---|
| Free plan | Yes, 10K words one time | Nov 8, 2026 | originality.ai |
| Starting price | $12.95/month billed annually (Pro); $14.95 monthly | Nov 8, 2026 | originality.ai |
| Enterprise plan | $136.58/month billed annually; $179 monthly | Nov 8, 2026 | originality.ai |
Pros and cons
What works
- AI detection, plagiarism, readability and fact checks in one scan
- Credit system makes cost per word easy to predict
- Extensions for Chrome, Firefox and Google Docs
Why people leave
- Free allowance is a one-time batch rather than a monthly refill
- API access is limited to the expensive Enterprise plan
- Like all detectors, results are probabilities that can be wrong
Originality.ai vs GPTZero, Grammarly and ZeroGPT
From each app's listing and the prices verified on its own site. A dash means we haven't verified it yet.
| Attribute | Originality.ai | GPTZero | Grammarly | ZeroGPT |
|---|---|---|---|---|
| Pricing | Free plan + paid | Free plan + paid | Free plan + paid | Free plan + paid |
| Verified price | $12.95/month billed annually (Pro); $14.95 monthly | — | $12 per member/month billed annually ($30 monthly), Pro | — |
| Free plan | Yes, 10K words one time | Yes | Yes, $0 a month with 100 AI prompts | $0 forever |
| Open source | No | No | No | No |
| Self-hostable | No | No | No | No |
| Platforms | Web, Browser extension | Web, Browser extension | Web, Windows, macOS, iOS, Android, Browser extension | Web |
Top Originality.ai alternatives
See all 7- 1
GPTZero68.8More focused on education, with Classroom and Canvas integrations and free short scans without an account.
- 2
Grammarly66.2Bundles an AI detector and plagiarism checker with the grammar editor many writers already use.
- 3
ZeroGPT55.9Free AI text detector you can paste into without an account, handy for quick spot checks.
- 4
QuillBot54.8A free AI detector bundled with paraphrasing and grammar tools for occasional checks.
- 5
Scribbr47.8Student-focused AI detector and plagiarism checker, aimed at essays and theses rather than web content.
Why people left Originality.ai
In reviewers' own words, from reviews of the apps they moved to. These are their opinions, not ours.
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Originality.ai: common questions
What is Originality.ai?
Originality.ai: AI and plagiarism checker for publishers, agencies and content teams. Best for publishers and SEO agencies checking freelance content for AI writing and plagiarism. Available for Web and Browser extension.
Is Originality.ai free?
Originality.ai has a free plan and paid plans. Free plan: Yes, 10K words one time (checked on Originality.ai's own site).
How much does Originality.ai cost?
Originality.ai is free with paid plans. Free plan: Yes, 10K words one time; Starting price: $12.95/month billed annually (Pro); $14.95 monthly; Enterprise plan: $136.58/month billed annually; $179 monthly. Checked on Originality.ai's own site, November 2026.
Is Originality.ai open source?
No, Originality.ai is not open source.
What platforms does Originality.ai run on?
Originality.ai is available for Web and Browser extension.
What are the best alternatives to Originality.ai?
The highest-ranked Originality.ai alternatives right now are GPTZero, Grammarly and ZeroGPT. See the full ranked list for pricing, platforms and verified facts.
Originality.ai vs GPTZero: what's the difference?
Both Originality.ai and GPTZero are free with paid plans. Both run on Web and Browser extension.