Updated March 2026
Compare 7 plagiarism detection tools. Turnitin, Copyscape, TextShift, and more compared on database size, accuracy, and pricing.
| Tool | Database Size | Free Tier | Price | Best For | Rating |
|---|---|---|---|---|---|
| Turnitin | 99B+ pages | ✗ | Institutional | Universities | 9.2/10 |
| Copyscape | Entire web | ✓ Basic | $0.03/search | Web content | 8.8/10 |
| TextShift | 10B+ pages | ✓ 5K words | $9.99/mo | All-in-one | 9.0/10 |
| Quetext | 35B+ pages | ✓ 500 words | $14.99/mo | Students | 8.2/10 |
| Scribbr | 91B+ pages | ✗ | $19.95/check | Academic | 8.5/10 |
| Grammarly | 16B+ pages | ✗ | $12/mo | Writers | 8.0/10 |
| PlagScan | 30B+ pages | ✓ Trial | $5.99/mo | Education | 7.8/10 |