18.3
Cloudflare Gateway is a web and network filtering service with controls for blocking content and managing how users reach online resources.
Free planAndroidiOSWeb
Best Secure Email Gateway Software in 2026
27.5
AndroidiOSAPI
36.6
AndroidiOSWeb
- 4
SpamHero Business Email Security
SpamHero Business Email Security filters a domain’s incoming email in the cloud and forwards clean messages to the customer’s mail server.
WebAPI6.5From $5 a month - 5
Sophos Secure Message
Sophos Secure Message is part of Sophos Email, a cloud service that protects inboxes from phishing, business email compromise, spam, and email-delivered malware.
Web6.2 - 6
Libraesva Email Security
Libraesva Email Security provides layered, AI-driven protection against email threats for organizations.
WebSelf-hosted5.8 - 7
Proxmox Mail Gateway
Proxmox Mail Gateway is an open-source email gateway for Linux and the web, deployed in a gateway role with outbound filtering.
WebLinux5.8From €190 a year (€15.83 a month) - 8
SpamTitan Gateway
SpamTitan Gateway is an anti-spam appliance for administrators who need to control mail flow and protect networks from unwanted email and malware.
WebSelf-hosted5.8 - 9
Symantec IT Management Suite
Symantec IT Management Suite manages, patches, and remediates application and operating system configurations across desktops, laptops, and servers…
APILinuxmacOSSelf-hosted5.8 - 10
Mailinblack Protect
Mailinblack Protect is an email-security solution for companies, public administrations, and healthcare institutions.
WebAPISelf-hosted5.6 - 11
Barracuda Message Archiver
WebmacOSWindows5.3 - 125.1
- 13
4.9 - 144.9
- 15
4.8 - 164.8
- 17
MDaemon SecurityGateway
WebWindows4.7 - 18
4.5