Side by side
Crossref Similarity Check vs Turnitin AI Writing Detection
Both stand on plagiarism checkers. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Paid APIWeb
Similarity Check offers manuscript comparison and editorial reports for qualifying Crossref members. Its membership and metadata requirements, annual fee, and regional restriction matter when assessing eligibility.
Visit Crossref Similarity Check Paid Web
Turnitin combines percentage-based reporting, highlighted passages, and integrations for institutional review. Its stated interpretation limits mean results should inform decisions rather than serve as the sole basis for adverse action.
Visit Turnitin AI Writing DetectionThe facts
| Crossref Similarity Check | Turnitin AI Writing Detection | |
|---|---|---|
| Free plan | No | No |
| Open source | Not published | Not published |
| Runs on | API, Web | Web |
| Lowest paid plan | See the plans | Free or on request |
| Plans published | 2 | 1 |
| Maker | Not published | Not published |
| Website | crossref.org | turnitin.com |
| On plagiarism checkers | #25 of 31 | #29 of 31 |
Crossref Similarity Check: what it does well
- Compares manuscripts with academic and general web content.
- Reports highlight matching text and provide a Similarity Score.
- Manuscripts can be submitted through an API.
- First 100 yearly checks are free, up to 25,000 words each.
What to know first
- Participation requires Crossref membership and qualifying publishing activity.
- Annual service fee depends on the membership fee tier.
- Unavailable to members based in Russia.
Turnitin AI Writing Detection: what it does well
- Highlights relevant text segments
- Detects likely AI-paraphrased writing
- Supports English, Spanish, Japanese, and Arabic
- Exports reports as PDF
- Offers LMS integration and API access
What to know first
- No free plan
- Pricing is available only on request
- Reports require 300 to 30,000 words
- The model may misidentify writing
Alternatives to Crossref Similarity Check Alternatives to Turnitin AI Writing Detection The whole list