Top Secure Email Gateway Vendorsin 2026

Barracuda, FortiMail, Cisco Secure Email, Trend Micro and Clearswift by Fortra top this SEG ranking for catch rate, admin control and Microsoft 365 support.

14

Secure Email Gateway Ranked

14

Vendors

Last Updated

October 9, 2026

Barracuda, FortiMail, Cisco Secure Email, Trend Micro and Clearswift by Fortra top this SEG ranking for catch rate, admin control and Microsoft 365 support.

Not sure which to pick? See the top 3 side by side: Cisco Secure Email, FortiMail, Egress Secure Email.

Compare the top 3
#1 Top Rank
Editorial #1 ChoiceEmail Security
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Cisco logo
Cisco Secure Email
byCiscoVerified
San Jose, California, USA80,000+

Cisco Secure Email delivers dynamic file analysis for phishing prevention. Explore its Email Security capabilities, deployment choices and top competitors.

Phishing preventionBusiness email compromise protectionEmail encryptionSpam mitigationOutbound data loss prevention

Deployment

SaaS, Cloud, Hybrid

Integrations

Microsoft 365, Microsoft Exchange, Cisco SecureX +5

Target Users

Cross-industry, Financial Services, Healthcare, Government, Retail, Technology

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2 Type II, ISO 27001, HIPAA, PCI DSS, GDPR
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#2 Runner Up
Email Security
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Fortinet logo
FortiMail
byFortinetVerified
Sunnyvale, California, USA10,000+

FortiMail offers anti-spam, anti-phishing and malware protection. Use it for inbound email security and phishing defense. See Secure Email Gateway alternatives.

Inbound email securityPhishing defenseMalware filteringOutbound data protectionEmail compliance

Deployment

Cloud

Integrations

FortiSandbox, FortiAnalyzer, FortiSIEM +4

Target Users

Enterprise, SMB, Financial services, Healthcare, Government, Education, Manufacturing, Retail, Technology, Service providers

Enterprise Ready:SSO ReadyRBACREST APICompliance: Supports security controls used in common regulated environments; exact certifications depend on product, model, release and deployment
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#3 Ranked
Email Security
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Egress logo
Egress Secure Email
byEgressVerified
London, United Kingdom500+

Egress Secure Email covers unified email security suite, AI phishing detection and contextual DLP prompts for Email Encryption. Compare top Email Security tools.

Email SecurityDLPSecure Email GatewayEmail EncryptionBEC Protection

Deployment

SaaS, Cloud

Integrations

Microsoft 365, Google Workspace, Microsoft Entra ID +1

Target Users

Global Enterprise, Banking, Legal, Healthcare, Government

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2 Type II; ISO 27001; NCSC CPA; HIPAA; GDPR
View Full Product Profile
#4
Email Security
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Proofpoint logo
Proofpoint Email Protection
byProofpointVerified
Sunnyvale, California, USA4,000+

Get the facts on Proofpoint Email Protection: outbound DLP. Built for inbound malware and spam filtering. Compare it with other Email Security options before you decide.

Inbound malware and spam filteringEmail spoofing preventionOutbound message policy enforcementMail flow encryption

Deployment

SaaS, Cloud, Hybrid

Integrations

Microsoft 365, Google Workspace, Proofpoint TAP +2

Target Users

Enterprise, Financial Services, Healthcare, Government, Cross-industry

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2 Type II; ISO 27001; FedRAMP Authorized; GDPR; HIPAA
View Full Product Profile
#5
Email Security
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Fortra logo
Fortra Clearswift Secure Email Gateway
byFortraVerified
Eden Prairie, Minnesota, USA3,000+

Fortra Clearswift Secure Email Gateway: Deep Content Inspection and adaptive DLP redaction. Built for outbound email DLP. Compare Secure Email Gateway alternatives.

Inbound phishing mitigationOutbound email DLPDocument sanitizationRegulatory compliance enforcement

Deployment

SaaS, Cloud, On-Premise

Integrations

Microsoft 365, Microsoft Exchange, Google Workspace +2

Target Users

Government, Financial Services, Healthcare, Defense, Enterprise IT, Government & Defense, Banking, Legal, Critical Infrastructure

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2 Type II; ISO 27001; GDPR; HIPAA; PCI-DSS; CMMC
View Full Product Profile
#6
Secure Email Gateway
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Barracuda Networks logo
Barracuda Email Security Gateway
byBarracuda NetworksVerified
Campbell, California, USA1,001-5,000

Barracuda Email Security Gateway, from Barracuda Networks, provides spam filtering. Common uses: DLP. Check deployment options and top Email Security competitors.

Secure Email GatewayEmail SecuritySpam FilteringDLP

Deployment

On-Premise

Integrations

Microsoft Exchange, Lotus Notes, Sendmail

Target Users

Large Enterprise, Government, Education

Enterprise Ready:SSO ReadyRBACREST APICompliance: FIPS 140-2; Common Criteria; ISO 27001; SOC 2
View Full Product Profile
#7
Email Security
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Hornetsecurity logo
Hornetsecurity Email Security
byHornetsecurityVerified
Hanover, Germany1,000+

Hornetsecurity Email Security: sandboxing ATP engine and automated email encryption. Built for business email compromise defense. Compare Email Security alternatives.

Business email compromise defensePhishing and ransomware interceptionAutomated email encryptionMicrosoft 365 cloud backup and archiving

Deployment

SaaS, Cloud

Integrations

Microsoft 365, Google Workspace, Microsoft Entra ID +2

Target Users

Enterprise IT, MSPs, Small & Medium Enterprises, Healthcare, Financial Services

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2 Type II; ISO 27001; GDPR; HIPAA; Cyber Essentials
View Full Product Profile
#8
Email Security
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Mimecast logo
Mimecast Email Security
byMimecastVerified
London, United Kingdom5,000+

Evaluating Mimecast Email Security? See how this Email Security tool handles attachment sandboxing, where it fits best and which alternatives to compare.

Advanced email threat protectionSpear-phishing preventionAttachment sandboxingDMARC enforcement

Deployment

SaaS, Cloud

Integrations

Microsoft 365, Google Workspace, Exchange Server +1

Target Users

Cross-industry, Finance, Legal, Healthcare, Retail, Education

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2 Type II; ISO 27001; GDPR; HIPAA
View Full Product Profile
#9
Email Security
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Trend Micro logo
Trend Micro Email Security
byTrend MicroVerified
Tokyo, Japan7,000+

Trend Micro Email Security helps teams with click-time URL. Explore features like click-time protection, cloud deployment and the closest Email Security competitors.

Inbound email gatewayPhishing protectionAttachment sandboxingClick-time URL

Deployment

SaaS, Cloud

Integrations

Microsoft 365, Google Workspace, Microsoft Exchange +1

Target Users

Cross-industry, Enterprise, Education, Government

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2; ISO 27001; GDPR; HIPAA
View Full Product Profile
#10
Email Security
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Kaspersky logo
Kaspersky Security for Mail Server
byKasperskyVerified
Moscow, Russia5,000+

Kaspersky Security for Mail Server is a secure email gateway & mail defense for secure email filtering. See features and Secure Email Gateway alternatives.

Secure email filteringAnti-phishing heuristic defenseAttachment sandbox

Deployment

On-Premise

Integrations

Microsoft Exchange, Linux Postfix, Sendmail +2

Target Users

Cross-industry, Enterprise, Government, Education

Enterprise Ready:SSO ReadyRBACREST APICompliance: ISO 27001; SOC 2; GDPR
View Full Product Profile
#11
Email Security
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SonicWall logo
SonicWall Email Security
bySonicWallVerified
Milpitas, California, USA1,000+

SonicWall Email Security is a secure email gateway & anti-phishing for secure email filtering and spear-phishing heuristics. See features and Email Security alternatives.

Secure email filteringSpear-phishing heuristicsCapture ATP sandboxing

Deployment

SaaS, Cloud, On-Premise

Integrations

Microsoft 365, Google Workspace, Microsoft Exchange +1

Target Users

Cross-industry, Enterprise, Healthcare, Education

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2; ISO 27001; HIPAA
View Full Product Profile
#12
Email Security
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Trellix logo
Trellix Email Security
byTrellixVerified
San Jose, California, USA5,000+

Trellix Email Security is a secure email gateway & cloud email defense for BEC protection and phishing prevention. See features and Email Security alternatives.

Phishing preventionMalicious attachment sandboxingBEC protection

Deployment

SaaS, Cloud, On-Premise

Integrations

Microsoft 365, Google Workspace, Microsoft Exchange +1

Target Users

Cross-industry, Enterprise, Government, Education

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2; ISO 27001; HIPAA; GDPR
View Full Product Profile
#13
Email Security
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ESET logo
ESET Mail Security
byESETVerified
Bratislava, Slovakia5,000+

Free trial available. ESET Mail Security by ESET offers multi-layer anti-spam and anti-phishing. Compare features, use cases and leading Anti-Phishing alternatives.

Email SecurityAnti-PhishingAnti-Spam

Deployment

Cloud, On-Premise

Integrations

Microsoft Exchange, IBM Domino, Postfix

Target Users

Cross-industry, SMBs, Enterprise

Enterprise Ready:RBACREST APICompliance: ISO 27001; GDPR
View Full Product Profile
#14
Email Security
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Sophos logo
Sophos Email
bySophosVerified
Oxford, United Kingdom6,000+

Free trial available. Sophos Email by Sophos offers predictive AI email defense and anti-phishing. Compare features, use cases and leading Email Security alternatives.

Email SecurityAnti-Phishing

Deployment

SaaS, Cloud

Integrations

Microsoft 365, Google Workspace, Exchange

Target Users

Cross-industry, Education, Healthcare

Enterprise Ready:SSO ReadyRBACREST APICompliance: SOC 2; ISO 27001; HIPAA; GDPR
View Full Product Profile

Frequently Asked Questions

Quick answers about Top Secure Email Gateway Vendors.

Which are the top Secure Email Gateway vendors on Cyber Rank?

Top Secure Email Gateway Vendors currently lists 14 products, in editorial order: #1 Cisco Secure Email, #2 FortiMail (Fortinet), #3 Egress Secure Email, #4 Proofpoint Email Protection, #5 Fortra Clearswift Secure Email Gateway, #6 Barracuda Email Security Gateway (Barracuda Networks), #7 Hornetsecurity Email Security, #8 Mimecast Email Security, #9 Trend Micro Email Security, #10 Kaspersky Security for Mail Server, #11 SonicWall Email Security, #12 Trellix Email Security, #13 ESET Mail Security, #14 Sophos Email.

Which product is ranked #1 in Top Secure Email Gateway Vendors?

Cisco Secure Email by Cisco is ranked first by the Cyber Rank editorial team.

View Cisco Secure Email →

How is Top Secure Email Gateway Vendors put together?

The Cyber Rank editorial team selects the products on this list and decides their order after reviewing each product's features, deployment options, integrations, industry fit and vendor background. It is not a market-share or customer-review ranking.

Which products appear here?

Products that our editors picked for Secure Email Gateway and that have a published Cyber Rank profile.

Can a product appear in other rankings?

Yes. Editors can list a product in any ranking where it is a strong fit, so it may appear in several.

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