| Application | Open | Cost | Sync | Storage | Web UI | Versioning |
|---|---|---|---|---|---|---|
| Pydio | YES | free | YES | S3, hpcloud, Dropbox, Local | YES | YES |
| OwnCloud | YES | free | YES | S3, Google, Dropbox, Local | YES | YES |
| Seafile | NO | free | ? | YES | ? | |
| Dropbox | NO | paid | YES | proprietary cloud | YES | YES |
| Google Drive | NO | paid | YES | proprietary cloud | YES | YES |
| BT Sync | NO | free | YES | P2P | NO | NO |