Originality AI (originality.ai) is an AI detection platform that launched in November 2022,[1] which primarily checks AI text but also provides plagiarism checking, grammar tools, and fact-checking services.
Pros
- 100% AI detection from LLM-generated content
- 100% plagiarism was identified.
Cons
- 1 false positive in our testing.
- 5 of 8 humanized texts failed AI detection.
Features
- AI detector: Text, documents, and webpages (URLs).
- Plagiarism checker: Detects copied or unoriginal text.
- Content optimizer: To help rank better in Google search.
- Bulk scan: Scan multiple texts at once via CSV file.
- Fact checker: Check the authenticity of facts.
- Grammar checker: To fix spelling and grammar issues.
- Readability checker: To make text easier to read or sound professional.
- Chrome extension
- Moodle plugin
- WordPress plugin
- API
Pricing Plans
| Free Plan | Pay as you go | Pro | Enterprise |
| No signup required | $30 | $14.95/month or $155.40/year | $179/month or $1,638.96/year |
| Allowed 2-3 scans per day (12,000 characters maximum) | 3,000 credits (2-year expiry) | 2,000 credits/month (1-month expiry) | 15,000 credits (1-month expiry) |
| Features include basic AI content detection. | Access to all features except the Chrome extension and API access. | All features included except API access. | All features included. |
Credit Values
Originality.AI vs. AI-Generated Content
We used the top LLMs (ChatGPT, Claude, Gemini, etc.) to see if, with the following prompt, Originality would be able to detect non-human writing.
Prompt Used
“Can you write me an 500 word article about the moon with the intent of being factual while also trying to sound as human as possible, specifically, to pass AI detectors? Please remove all em dashes in your generation”.
Expand
Collapse
| LLM | Test Result | Proof |
| ChatGPT – 5.2 Thinking Model | 0% Human
✅ |
 |
| Claude – Sonnet 4.6 Extended | 16% Human
✅ |
 |
| Google Gemini – Thinking | 0% Human
✅ |
 |
| Deepseek – Deepthink | 0% Human
✅ |
 |
| Perplexity – Free Model | 0% Human
✅ |
 |
| Grok – Auto | 0% Human
✅ |
 |
| Meta | 0% Human
✅ |
 |
Originality.AI vs AI Humanizers
For this test, we used the above text generated from Claude (since it showed the highest percentage of “human” writing at 16%) and ran it through the humanizers below. We then ran the humanized text through Originality’s detector to see if it caught the non-human content.
Expand
Testing False-Positives + Plagiarism
We used 10 unique, human-written texts from the Gettysburg address by Abraham Lincoln to the text “Pride and Prejudice” to test whether Originality gave any false positives.
Expand
| Article URL | Test Result | Proof |
| Pride and Prejudice (preface) | 100% Human, 97% Plagiarism
(passed) |
 |
| Gettysburg Address | 100% Human, 100% Plagiarism
(passed) |
 |
| The Guardian (article) | 99% Human, 92% Plagiarism
(passed) |
 |
| Wikipedia (“gravity”) | 97% Human, 96% Plagiarism
(passed) |
 |
| NPR (article) | 100% Human, 100% Plagiarism
(passed) |
 |
| Hubspot (article) | 52% Human, 88% Plagiarism
(failed) |
 |
| The Market House (interview) | 68% Human, 82% Plagiarism
(passed) |
 |
| Medium.com (article) | 100% Human, 98% Plagiarism
(passed) |
 |
| arXiv Academic Writing | 100% Human, 100% Plagiarism
(passed) |
 |
| Stanford Article (Encyclopedia) | 100% Human, 91% Plagiarism
(passed) |
 |
Is Originality AI Accurate?
On Trustpilot, Originality.AI receives generally very positive reviews, although the most popular topic was customer service.
However, users seemed satisfied with its detection services overall and have deemed it to be largely reliable with 80% of it’s 1100+ reviews being 5 stars.
Frequently Asked Questions
Do unused credits carry over?
It depends. Subscription credits expire at the end of each billing month, while ‘pay as you go’ tokens expire at the end of 2 years.[4]
Are sentence-by-sentence breakdowns provided?
Yes, but it only gives a numerical value for each sentence and does not share the reason why it’s considered AI or human (see image).
Is document scanning allowed?
Yes, Originality.ai supports document scanning with PDF (.pdf) and MS Word (.doc and .docx) formats.[5]
Is image scanning provided?
Yes, image scanning is provided, allowing PNG, JPG, and WebP file types to be uploaded to this webpage.
Are reports shareable?
Yes, Originality.ai allows the sharing of link-based reports.[6]
Does Originality.ai provide certifications?
No, Originality.ai does not provide any attached certificate as part of its detection report.
Are AI detections used for internal training?
Yes, but subscribers can opt-out of such training by going to this webpage, after login, and selecting the radio button titled “Use anonymized data to improve our model” (see image).[7]
Sources
- https://originality.ai/about
- https://help.originality.ai/en/article/how-many-words-does-a-credit-scan-1uwp6dq/
- https://originality.ai/pricing
- https://originality.ai/refund-policy
- https://help.originality.ai/en/article/scan-history-1lfs02m/
- https://help.originality.ai/en/article/how-to-share-your-scan-with-originalityai-ueyx9y/
- https://help.originality.ai/en/article/how-to-opt-out-of-data-collection-1jh50jx/