Business Operations·Standings
Secure Email Gateway Software: Compare Options
Secure email gateway software helps protect email systems from threats and manage mail controls; compare deployment options and the protections you need. The signal score is out of 10, and the API, open-source and free-tier marks help show how a tool can fit your setup.
Review whether a free plan is available and the paid entry price, then compare malware sandboxing, outbound data loss prevention (DLP), email encryption, continuity spooling and archiving. Platform availability includes web, API, Windows, macOS, self-hosted and Linux options.
- 18 platforms
- 2 with a public API on this page
- 1 with a free tier
- Checked 28 Sept 2026
- 1 CG
Cloudflare Gatewaycloudflare.comCloudflare Gateway is a cloud-native secure web gateway that filters DNS, HTTP and network traffic for office and remote users.
- 2 MDMicrosoft Defender for Businessmicrosoft.com
Microsoft Defender for Business is an endpoint security solution for small and medium-sized businesses with up to 300 users that helps protect devices from…
- 3 SI
Symantec IT Management Suitebroadcom.comAn IT suite tracks assets and handles software updates and operating system deployment; pricing is by request.
- 4 SSSophos Secure Messagesophos.com
An email service lets recipients open secure messages after password verification; pricing is on request.
- 5 KCKerio Connectsupport.kerioconnect.gfi.com
An email and messaging server with Outlook integration, web email and mobile access; a 30-day trial is available.
- 6 SBSpamHero Business Email Securityspamhero.com
- 7 H3Hornetsecurity 365 Total Protectionhornetsecurity.com
A Microsoft 365 suite filters spam and threats, with archiving, encryption and a 14-day trial.
- 8 LE
Libraesva Email Securitylibraesva.comAn email security product uses locally processed AI to flag deceptive messages; a 30-day trial is available.
- 9 SG
SpamTitan Gatewayspamtitan.comAn on-premises email gateway filters unwanted mail and malware; annual pricing starts at $1.95 per user monthly.
- 10 MP
Mailinblack Protectmailinblack.comAn email security service filters spam, malware and phishing and checks links; pricing is on request.
- 11 MEMimecast Email Securitymimecast.com
An email security service detects malware, credential theft attempts and business email scams.
- 12 PM
Proxmox Mail Gatewayproxmox.comAn open-source mail gateway supports outbound filtering; paid plans start at €190 a year.
- 13 BMBarracuda Message Archiverbarracuda.com
- 14 MSMDaemon SecurityGatewaymdaemon.com
An email gateway offers outbound data-loss prevention and encryption, from $0.20/user/mo.
- 15 CP
Check Point Email SecurityCheck Point Software Technologies Ltd. - 16 TVTrend Vision One Container Securitytrendmicro.com
A hybrid service secures Kubernetes containers and creates software component inventories.
- 17 FE
Forcepoint Email Security Cloudforcepoint.comAn email service checks messages and attachments for phishing and malware; pricing is by request.
- 18 FE
FortiMail Email Securityfortinet.comAn email security product with outbound filtering, impersonation protection and malware sandboxing.
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How to choose
Where does the gateway need to run?
Start with the deployment options your organization can support. The category includes web, API, Windows, macOS, Linux and self-hosted options.
A public API can matter if you need software to connect with other systems. Check the API mark and the deployment details before comparing tools.
Which email protections do I need?
Choose a gateway based on the protections that match your email risks and policies. The comparison includes malware sandboxing, outbound DLP and email encryption.
Sandboxing checks potentially harmful files in an isolated environment; outbound DLP helps control sensitive information sent by email. Confirm how a product handles the controls you require.
Do I need continuity spooling or email archiving?
Look for continuity spooling if mail needs to be held and delivered when the primary mail system is unavailable. Email archiving is a separate comparison point for retaining messages.
For example, Barracuda Message Archiver is listed as a paid product with pricing on request.
How do plan costs compare?
Compare the free-plan mark, paid starting price and trial terms separately. A free trial is not the same as a continuing free plan.
Cloudflare Gateway offers a no-cost plan, with paid service starting at $7 per user monthly. MDaemon SecurityGateway starts at $0.20 per user monthly and lists a 30-day trial; pricing for other listed tools is available on request.
Questions
What is the role of secure email gateway software?
It helps protect email systems and manage mail controls. Compare malware sandboxing, outbound DLP, encryption, continuity spooling and archiving.
Which secure email gateways have a free plan?
Check the free-plan mark separately from trial availability. Cloudflare Gateway includes a free option, while its paid pricing begins at $7 per user per month.
Can I try secure email gateway software before paying?
Trial terms are listed for some products: Check Point Email Security and Hornetsecurity 365 Total Protection each show 14 days, while Kerio Connect shows 30 days.
What platforms should I check for an email gateway?
The platform options shown include web, API, Windows, macOS, self-hosted and Linux. Match these to the systems and deployment approach you need.
What is the difference between email archiving and continuity spooling?
Email archiving is for retaining messages. Continuity spooling holds mail for delivery when the primary mail system is unavailable; they are separate comparison features.
Some top positions on this board can be paid placements, standing where they were sold. The facts on each platform are not for sale. How we rank · Disclosure