Copyleaks AI Detector vs Smodin Plagiarism Checker
Copyleaks AI Detector
copyleaks.com
Smodin Plagiarism Checker
smodin.ioSide by side
| Figure | Copyleaks AI Detector | Smodin Plagiarism Checker |
|---|---|---|
| Price from | $13.99/mo | $10/mo |
| Free plan | — | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 12 | 4 |
| Spec score · Plagiarism Checkers | 9.2 (#1) | 7.4 (#24) |
| Purpose | The AI Detector identifies AI-written text, including text blended with human writing. | The plagiarism checker compares text against web and academic sources and returns similarity scores, matched sources, and highlighted sections. |
| Security | Copyleaks states that data is encrypted at rest with AES-256 and that it holds SOC 2 and SOC 3 certifications and supports GDPR compliance. | Smodin says it uses security measures and technologies to protect information from unauthorized disclosure, access, or use, while noting that internet security cannot be guaranteed at 100%. |
Plans
Copyleaks AI Detector
- PersonalPriced on request
- ProPriced on request
- Personal$16.99 a month
- Personal (monthly billing)$16.99 a month
- Pro$99.99 a month
- Pro (monthly billing)$99.99 a month
- Personal (annual billing)$167.88 a year
- Pro (annual billing)$899.88 a year
- EducationPriced on request
- EducationPriced on request
Smodin Plagiarism Checker
- Starter$10 a month
- Premium$16 a month
- Starter$10 a month
- Premium$16 a month
In their own words
Copyleaks AI Detector
Copyleaks AI Detector identifies AI-written text, including writing that mixes AI and human passages. It supports more than 30 languages and names GPT-5, GPT-4, ChatGPT, Claude, Gemini, DeepSeek, Llama, Bloom, Rytr, and Jasper among the sources it detects. AI Logic explains flagged results, displays AI phrase frequency, and can identify text appearing in published content elsewhere. The web detector scans up to 25,000 characters without login; the website platform requires at least 255 characters and accepts up to 2,000 pages. A Chrome and Edge extension accepts 350 to 25,000 characters, and a Google Docs add-on and education LMS integrations connect it to other workflows. Personal costs $13.99 a year with annual billing or $16.99 a month; Pro costs $74.99 a year with annual billing or $99.99 a month. A free plan and free trial are listed. Copyleaks says data is encrypted at rest with AES-256, reports SOC 2 and SOC 3 certifications, and supports GDPR compliance.
Smodin Plagiarism Checker
Smodin Plagiarism Checker has no write-up on Specifiction yet; its figures are above.