Copyleaks vs Duolingo vs GPTZero vs Grammarly
| Attribute | ||||
|---|---|---|---|---|
| Category | Content & Writing | Education & Learning | Content & Writing | Content & Writing |
| Pricing | Free tier | Free tier | Free tier | Free tier |
| Starting price | $7.99/month | $5/month | $0/month | $12/month |
| Free tier | Yes | Yes | Yes | Yes |
| Free trial | Yes | Yes | No | Yes (7d) |
| Deployment | — | — | — | — |
| API available | Unknown | Unknown | Unknown | Yes |
| Platforms | — | — | — | — |
| Certifications | — | — | — | 1 |
| Integrations | — | — | — | — |
| Company | — | — | — | Founded 2009 |
| Feature attributes | ||||
| Sso Saml | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Rbac | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Mobile App | — Unknown | — Unknown | — Unknown | — Unknown |
| Webhooks | — Unknown | — Unknown | — Unknown | — Unknown |
| Data Export | — Unknown | — Unknown | — Unknown | — Unknown |
| Ai Generation | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Grammar Check | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Plagiarism Check | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Brand Voice | — Unknown | — Unknown | — Unknown | ✓ Yes |
| Browser Extension | — Unknown | — Unknown | — Unknown | ✓ Yes |
Also consider
Unknown values show as “Unknown”/“—”. Nothing is inferred — see each tool page for sources.