| Price from | Free | $2.99/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Plans published | 1 | 2 |
| Spec score · AI Study Tools | 8.3 (#33) | 9.0 (#6) |
| AI flashcards | Yes | Yes |
| Free plan | Yes | Yes |
| Headquarters | Pyrmont, Sydney, Australia | San Francisco, California, United States |
| Mobile app coverage | none | ios_android |
| AI quizzes | Yes | Yes |
| Security | Paper says it does not train models on uploads, uses TLS 1.2+ in transit, and encrypts database and file storage at rest. | Quizlet says its website and mobile apps use HTTPS encryption and that it maintains a security program and bug bounty program. |
| Source uploads | Yes | Yes |
| Study tools | Paper generates notes, flashcards, quizzes, and a chat interface from uploaded content, and supports spaced repetition. | Quizlet provides flashcards and study activities including Learn and Test. |
| AI summaries | Yes | Yes |