NoSpamProxy vs SpamSieve
| NoSpamProxy | SpamSieve | |
|---|---|---|
| Free plan | No | No |
| Free trial | No | No |
| Paid from | — | — |
| Open source | No | No |
| Platforms | Web | macOS |
| Phishing detection | Yes | — |
| Malware scanning | Yes | No |
| Attachment scanning | Yes | Yes |
| Supported mail platforms | Microsoft 365, Microsoft Exchange and SMTP mail servers | Apple Mail, Airmail, GyazMail, MailMate, MailMaven, legacy Outlook, Entourage, MailForge, Mailsmith, Postbox, and PowerMail |
| Deployment type | cloud_gateway | mailbox_app |
| Free plan | — | No |
Both are listed in Best Email Anti-Spam Software. On Freedom251, NoSpamProxy scores higher on our published basis.