Proxmox Backup Server vs Sophos Secure Message
| Proxmox Backup Server | Sophos Secure Message | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | €46.67/mo | — |
| Open source | No | No |
| Platforms | Linux, Web | — |
| Free plan | No | No |
| Outbound filtering | Yes | Yes |
| Deployment model | gateway | cloud |
| Impersonation protection | — | Yes |
| Malware sandboxing | — | Yes |
| Microsoft 365 support | — | Yes |
| Google Workspace support | — | Yes |
Both are listed in Best Email Security Gateways, Best Email Anti-Spam Software. On Specifiction, Proxmox Backup Server scores higher on our published basis.