Scribbr
An academic writing platform for students offers free AI detectors, plagiarism checks, citation generation, and manual proofreading and polishing. The single AI detection limit is 1,200 words. It supports four languages: English, German, French, and Spanish, and can distinguish between AI-generated content and AI-polished content.
Updated: 2026-10-26
What is Scribbr?
Scribbr is an academic writing service platform for students. Its official website integrates proofreading and polishing, plagiarism checking, citation generation, and AI detection all in one place. The official states that 5 million students use its knowledge base every month. The biggest difference between it and similar detectors is that it is willing to clearly state the upper limit of accuracy: the official FAQ clearly states that no AI detector can guarantee 100% accuracy. In its own surveys, the best-performing paid tool has an accuracy rate of 84%, and the best free tool is 68%. In addition, AI detection and plagiarism checking are two independent mechanisms-the former looks at the statistical characteristics of the text, and the latter compares against web and journal databases. It is more suitable as a self-checking tool before submission rather than a judgment tool.
Who is it for?
- Students who want to check for AI traces before submitting papers or course assignments
- Teachers and academic administrators who need to check paragraph by paragraph and determine whether AI was used for drafting or polishing
- Bloggers and content editors who want to screen external contributions before accepting manuscripts
- Writers whose mother tongue is not English, who write in English, German, Spanish or French, and who worry about being misjudged
- People who are also using Scribbr's proofreading and citation generation services
Key features
6Free Unlimited AI Detection
The official service states that it can be used for free without registration, with unlimited times, a maximum submission limit of 1,200 words per time, and it declares that it will not store or share the submitted content.
Four types of writing status distinction
The results classify the text into four categories: human-written, AI-generated, AI-generated and rewritten, and human-written and rewritten, allowing you to tell whether AI was used for drafting or only for polishing.
Paragraph-level feedback
Marks sections that may have been generated or rewritten by AI paragraph by paragraph, and provides an AI score ranging from 0% to 100%, making it easy to locate specific sentences for revision.
Multilingual Support
The official FAQ states that English, Spanish, German, and French are currently supported, while other languages are not yet covered.
Model Differences Between Free Version and Premium
The official statement says the free version has average accuracy for GPT-2, GPT-3, and GPT-3.5, while the Premium version offers high accuracy for GPT-4.
Plagiarism Checker and Citation Generator
These are plagiarism detection and citation generation tools alongside AI detection. The former checks for duplicates by comparing databases, while the latter is used to generate standardized citations.
How to use Scribbr
- The official recommendation is to scan longer texts rather than single sentences or paragraphs-the shorter the sample, the more unstable the statistical features and the higher the probability of misjudgment.
- The 1,200-word limit for the free version means that long papers need to be scanned in sections.
- it is advisable to split them by chapter, which aligns better with actual writing units than breaking the entire text into pieces.
- There is no need to rush to delete content just because of an AI score: first, judge whether it is "AI drafting" or "AI polishing" by referring to paragraph-level feedback, as the nature of these two often differs according to school rules.
- If your school specifies using institution-level tools such as Turnitin or Copyleaks, Scribbr’s results can only be used as a reference, since their algorithms and databases are not the same.
- Detection rules, free quotas, and the model coverage of Premium may be adjusted, so it is recommended to recheck the official website instructions before formal submission.
Traffic & popularity
Data month Sep 2026
Scribbr receives about 4.4M visits per month and ranks #14,458 worldwide.
Monthly visits
12 monthsTraffic sources
- Search59.9%
- Direct31.2%
- Referrals4.4%
- Social2.7%
- AI assistants1.2%
- Other0.6%
Top countries
- United States31.5%
- Philippines19.3%
- Canada5.0%
- India3.5%
- Mexico3.5%
Estimated from third-party traffic data.
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