14-criteria comparison across Sejda, PDF Buddy, Apple Preview, and Kdan PDF. All data sourced from publicly available product documentation and official feature pages. Capabilities may vary depending on platform version, operating system, and subscription tier.
This comparison focuses on features relevant to individual users and small teams rather than enterprise deployment scenarios. If your requirements include volume licensing, LDAP integration, or large-scale document automation, consult each vendor directly for enterprise-specific documentation.
| Criteria | Sejda | PDF Buddy | Apple Preview | Kdan PDF |
|---|---|---|---|---|
| Web access | ✓ | ✓ | ✗ | Limited |
| Desktop app | ✓ | ✗ | ✓ macOS | ✓ |
| Mobile app | Limited | ✗ | ✓ iOS | ✓ |
| Text editing | ✓ | Overlay | ✗ | Basic |
| OCR | ✓ | ✗ | ✗ | Limited |
| Merge / split | ✓ | Limited | Basic | ✓ |
| Form creation | ✓ | ✗ | ✗ | ✗ |
| Form filling | ✓ | ✓ | ✓ | ✓ |
| Digital signature | ✓ | ✓ | ✓ | ✓ |
| Encryption | ✓ | Basic | ✓ | ✓ |
| Redaction | ✓ | ✗ | ✗ | ✗ |
| Linux support | ✓ | ✗ | ✗ | ✗ |
| Cloud sync | Limited | ✗ | iCloud | ✓ |
| Batch processing | ✓ | ✗ | ✗ | Limited |
✓ = Supported | ✗ = Not supported | Yellow = partial or limited. Data reflects generally available product tiers as documented publicly. Enterprise or premium plans may offer additional capabilities.