The following is a chart showing the out of the box feature set of Horde_ActiveSync compared to other servers supporting EAS.
| Feature | Horde 4/5 | Z-Push 1/2 | Tine 2.0 | Notes | |
| EAS Version | 2.5/12.1 | 2.5/14* | 2.5 | * Z-Push 2 supports 14.0 only when using against Zarafa server. | |
| Autodiscover | |||||
| Proper support for ghosted properties | |||||
| Contact Sync | Yes | Yes* | Yes | * Contact support out of the box with Z-Push only when using against Zarafa server. | |
| Calendar Sync | |||||
| Recurring Event Support | |||||
| Task Sync | |||||
| Recurring Tasks | |||||
| Email Sync | |||||
| Hierarchical folder support | |||||
| HTML Email | |||||
| Full MIME support | |||||
| S/MIME on device encryption, decryption, and signing | |||||
| Set out of office message | |||||
| Meeting request/response | |||||
| Provisioning |
TODO: Security policies, other misc. features.