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Best Email Security Software 2026

Compare email security products by threat detection, phishing response, mail platform coverage, deployment route and buyer-relevant limits.

Verified 23 October 2026

15 products4 category-specific criteria

Ranked shortlist

0 of 15 publish a price · 0 offer a free plan · 7 offer a free trial

Rank1
Check Point Harmony
Why it ranks here: Cross-platform mail teams can deploy Check Point ThreatCloud AI link and attachment analysis through API without changing MX records.
Not a fit if: you need domain-only sender authentication for a cross-platform rollout; Check Point Harmony Email & Collaboration provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Check Point offers a free trial for Harmony Email & Collaboration.
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank2
Proofpoint Email
Why it ranks here: Security teams pairing behavioral detection with after-delivery cleanup get Proofpoint API or gateway deployment options.
Not a fit if: you need domain-only sender authentication for a behavioral detection program; Proofpoint Core Email Protection provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank3
IRONSCALES Email Security
Why it ranks here: Phishing analysts can combine IRONSCALES user-report triage with phishing simulations and security-awareness training.
Not a fit if: you need domain-only sender authentication for reported-phishing triage; IRONSCALES Email Security provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
IRONSCALES lists a free trial on its pricing page.
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank4
Sophos Email
Why it ranks here: Mail administrators adding click-time checks get Sophos Email attachment sandboxing and URL rewriting through its gateway.
Not a fit if: you need domain-only sender authentication for attachment checks; Sophos Email provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Sophos lists a free trial for Sophos Email.
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank5
FortiMail
Why it ranks here: Mixed-environment teams get FortiMail real-time scanning and message clawback across Microsoft 365, Google Workspace, and Exchange Online.
Not a fit if: you need domain-only sender authentication for Exchange and Google mail; FortiMail provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank6
Mimecast Email Security
Why it ranks here: Hybrid mail operators can keep on-premises and cloud systems within Mimecast’s listed hybrid deployment coverage.
Not a fit if: you need domain-only sender authentication for mixed mail hosting; Mimecast Advanced Email Security provides inbound email filtering.
Starting price
Not published
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank7
Cloudflare Email Security
Why it ranks here: Microsoft 365 admins reviewing older messages get Cloudflare’s 14-day Retro Scan with API, BCC, or MX deployment choices.
Not a fit if: you need domain-only sender authentication for Microsoft 365 history; Cloudflare Email Security provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank8
INKY Email Security
Why it ranks here: Google Workspace and Microsoft 365 admins get INKY’s advanced attachment analysis for both mail platforms.
Not a fit if: you need domain-only sender authentication for Google Workspace inboxes; INKY Email Security provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
DMARC monitoring
Review
Rank9
VIPRE IES
Why it ranks here: Midmarket mail teams get VIPRE inbound, outbound, and internal protection across Microsoft 365 and Google Workspace.
Not a fit if: you need domain-only sender authentication for hybrid environments; VIPRE Integrated Email Security provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
VIPRE advertises a 30-day free trial for Integrated Email Security.
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank10
Microsoft Defender
Why it ranks here: Microsoft 365 tenants get Safe Links and Safe Attachments from Defender for Office 365, protecting cloud mailboxes.
Not a fit if: you need domain-only sender authentication for Microsoft 365 accounts; Microsoft Defender for Office 365 provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Microsoft documents a 90-day Defender for Office 365 Plan 2 trial.
Inbound email filtering
Yes
BEC and impersonation protection
Not documented.
DMARC, SPF, and DKIM management
Not documented.
Review
Rank11
Abnormal Email Security
Why it ranks here: Teams handling user-reported phishing can use Abnormal automated triage and remediation without analyst involvement.
Not a fit if: you need domain-only sender authentication for phishing reports; Abnormal Email Security provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review
Rank12
Barracuda Email Protection
Why it ranks here: Security teams extending response beyond filtering get Barracuda New Incident Response and Account Takeover Protection.
Not a fit if: you need domain-only sender authentication for account takeover; Barracuda Email Protection provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Not documented.
DMARC, SPF, and DKIM management
DMARC domain fraud protection
Review
Rank13
SpamTitan
Why it ranks here: Administrators needing a searchable spam queue can pair SpamTitan quarantine with phishing defense and Microsoft 365 protection.
Not a fit if: you need domain-only sender authentication for spam quarantine; TitanHQ SpamTitan provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
TitanHQ says buyers can contact it to start a free trial of the latest SpamTitan version.
Inbound email filtering
Yes
BEC and impersonation protection
Not documented.
DMARC, SPF, and DKIM management
Not documented.
Review
Rank14
ESET Cloud Office Security
Why it ranks here: Microsoft 365 teams protecting Exchange Online and OneDrive get ESET spam and anti-phishing controls for both services.
Not a fit if: you need domain-only sender authentication for Exchange Online; ESET Cloud Office Security provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
ESET provides a Cloud Office Security business trial.
Inbound email filtering
Yes
BEC and impersonation protection
Not documented.
DMARC, SPF, and DKIM management
Not documented.
Review
Rank15
Kaspersky Mail Server
Why it ranks here: Mail-server operators get Kaspersky mailbox protection against BEC through virtual or software-appliance deployment.
Not a fit if: you need domain-only sender authentication for corporate mail servers; Kaspersky Security for Mail Server provides inbound email filtering.
Starting price
Not documented
Free plan
Not documented
Free trial
Not documented
Inbound email filtering
Yes
BEC and impersonation protection
Yes
DMARC, SPF, and DKIM management
Not documented.
Review

Best Email Security Software 2026 helps organizations comparing mailbox protection across mail platforms compare products on the facts vendors document. Start with the first choice for the page's job, then check its deployment and plan limits before shortlisting.

The order uses the page-specific evidence basis below; unknown platform, price, and response details remain marked as not documented. Read the Check Point Harmony Email & Collaboration review for the product workflow and continue to the email security directory.

How we assessed this shortlist

Eligibility requires at least three known category facts and an email-security workflow. Products positioned for multi-platform inbox protection with phishing or BEC controls rank first; products with documented reporting, triage, and message response follow, then single-suite or gateway choices. Within each tier, compare page-relevant controls and supported environments, then published price transparency. Thin evidence stays below the top five.

Compare the deciding features

Category-specific workflows and plan requirements

Best Email Security Software 2026: documented features
Product	Inbound email filtering	BEC and impersonation protection	DMARC, SPF, and DKIM management	Published starting price
Check Point Harmony Email & Collaboration	Check Point describes stopping email threats before they reach the inbox.[1]	Check Point says its prevention-first architecture stops business email compromise before users or AI agents can interact with the messages.[1]	Not documented[1]	Not documented[1]
Proofpoint Core Email Protection	Proofpoint positions Core Email Protection as email threat protection delivered by API or gateway.[2]	Proofpoint says Core Email Protection protects Microsoft 365 and Google Workspace against phishing and business email compromise.[2]	Not documented[2]	Not documented[2]
IRONSCALES Email Security	IRONSCALES protects inbound and outbound email against phishing, spam, BEC, malware, and QR lures.[3]	IRONSCALES explicitly lists business email compromise (BEC) protection.[3]	Not documented[3]	Not documented[3]
Sophos Email	Sophos describes a cloud-based email gateway that protects business mail from malicious threats.[4]	Sophos lists business email compromise protection and brand and identity detection.[5]	Not documented[4]	Not documented[4]
FortiMail	FortiMail lists inbound email protection against phishing, BEC, impersonation, and account takeover.[6]	FortiMail documents protection against business email compromise, impersonation, and account takeover.[6]	Not documented[6]	Not documented[6]
Mimecast Advanced Email Security	Mimecast describes blocking advanced threats across business email.[7]	Mimecast identifies business email compromise (BEC) among the threats addressed by Advanced Email Security.[7]	Not documented[7]	Not documented[7]
Cloudflare Email Security	Cloudflare says it analyzes every incoming email.[8]	Cloudflare explicitly includes business email compromise protection.[9] [8]	Not documented[9]	Not documented[9]
INKY Email Security	INKY lists inbound mail protection as a product capability.[10]	INKY lists business email compromise and CEO fraud among its email security use cases.[10]	INKY lists DMARC Monitoring as a product capability.[11]	Not documented[10]
VIPRE Integrated Email Security	VIPRE says Integrated Email Security protects inbound, outbound, and internal mail with native integration.[12] [13]	VIPRE identifies business email compromise among the email threats its product addresses.[12]	Not documented[12]	Not documented[12]
Microsoft Defender for Office 365	Microsoft documents Defender for Office 365 as its email and collaboration security solution for cloud mailboxes.[14]	Not documented[14]	Not documented[15]	Not documented[14]
Abnormal Email Security	Abnormal positions this product as a modern email security platform that detects attacks legacy gateways miss.[16]	Abnormal names business email compromise and vendor fraud among the attacks its behavioral model catches.[16]	Not documented[16]	Not documented[16]
Barracuda Email Protection	Barracuda describes Email Protection as AI-powered email security.[17]	Not documented[17]	Barracuda lists “Domain Fraud Protection (DMARC)” under Email Protection.[18]	Not documented[17]
TitanHQ SpamTitan	SpamTitan describes inbound scanning and email filtering for spam, malware, and other threats.[19] [19]	Not documented[19]	Not documented[19]	Not documented[19]
ESET Cloud Office Security	ESET describes protection for emails in Exchange Online with spam filtering.[20]	Not documented[20]	Not documented[20]	Not documented[20]
Kaspersky Security for Mail Server	Kaspersky says Security for Mail Server counters spam and email-borne infections in corporate email exchange.[21]	Kaspersky explicitly includes business email compromise protection.[21]	Not documented[21]	Not documented[21]

Evidence and sources

Email Security Services - Check Point SoftwareRetrieved 2026-10-23T04:02:38Z
Check Point's prevention-first architecture uses ThreatCloud AI to inspect every message and stop phishing, business email compromise, malware, and zero-day attacks before users or AI agents can interact with them. ThreatCloud AI analyzes behavior, identity, language, attachments, links, and threat intelligence to stop sophisticated attacks before they reach users or AI systems.
AI Email Security | Proofpoint Core Email ProtectionRetrieved 2026-10-23T04:02:38Z
Get industry-leading threat protection via API or gateway.
AI Email Security Platform for Phishing & Deepfakes | IronscalesRetrieved 2026-10-23T04:19:25Z
Inbound, outbound, accounts, meetings, and the people behind them, protected by one Adaptive AI that tests itself before attackers do. Email Phishing, Spam, Graymail, BEC, Malware, QR lures. Caught in the inbox.
Sophos Email: Your Complete Email Security PortfolioRetrieved 2026-10-23T04:36:37Z
Delivered through the Sophos Central management console, our cloud-based email gateway protects your business against malicious email threats.
Sophos Email: Your Complete Email Security PortfolioRetrieved 2026-10-23T04:44:43Z
Protect your sensitive information and people against malicious email threats, including phishing, business email compromise, and ransomware attacks in Sophos Email for Microsoft 365, Gmail, and other SaaS email services in which an organization manages the domain.
Email Security Solution | FortiMailRetrieved 2026-10-23T04:44:43Z
FortiMail protects against sophisticated phishing, business email compromise, impersonation, account takeover.
Advanced Email Security | MimecastRetrieved 2026-10-23T04:19:27Z
Effortlessly manage complexity while securing M365, Google Workspace, and on-premise email, blocking advanced threats.
Email security · Cloudflare One docsRetrieved 2026-10-23T04:59:30Z
Cloudflare Email Security uses AI, threat intelligence, and security rules to analyze every incoming email, protecting your organization from phishing, malware, Business Email Compromise (where attackers impersonate executives or authority figures to commit fraud), vendor email fraud, and spam. It integrates with your existing email provider (such as Outlook or Gmail) and can be deployed via API, BCC / Journaling, or MX/Inline.
Email Security | Anti-Phishing Protection | CloudflareRetrieved 2026-10-23T04:59:30Z
Effortlessly block and isolate phishing threats, including email-borne malware, business email compromise (BEC), and multi-channel (link-based) attacks — before they reach your users.
INKY Technology | Email Security Platform | Eliminate Phishing ThreatsRetrieved 2026-10-23T04:19:25Z
Products Inbound Mail Protection Outbound Mail Protection Internal Mail Protection Email Encryption Advanced Attachment Analysis Graymail Protection Email Signatures DMARC Monitoring.
INKY Technology | Email Security Platform | Eliminate Phishing ThreatsRetrieved 2026-10-23T05:53:52Z
DMARC Monitoring Featured Resource Annual Report - Volume, Impact, Variety, and Sophistication of Phishing Attacks on the Rise Read More Solutions By Use Case Account Takeover Brand Forgery Business Email Compromise CEO Fraud Malware and Ra
Integrated Email Security (IES) - VIPRERetrieved 2026-10-23T05:12:21Z
Smarter inbox protection for Microsoft 365 and Google Workspace.
Integrated Email Security (IES) - VIPRERetrieved 2026-10-23T06:14:48Z
Secure inbound, outbound, and internal mail with native integration.
Why do I need Microsoft Defender for Office 365? - Microsoft Defender for Office 365 | Microsoft LearnRetrieved 2026-10-23T04:02:38Z
Although all organizations with cloud mailboxes include built-in security features, Microsoft Defender for Office 365 is the primary email and collaboration security solution for Microsoft 365.
Microsoft Defender for Office 365 security documentation - Microsoft Defender for Office 365 | Microsoft LearnRetrieved 2026-10-23T04:02:38Z
Microsoft Defender for Office 365 documentation Learn about the robust security solutions in Defender for Office 365 to better protect your email and collaboration tools. Microsoft Defender for Office 365 Overview Investigate and respond
Email Security | Abnormal AIRetrieved 2026-10-23T04:02:38Z
Build a behavioral model of every person and every vendor connected to your organization: catching the BEC, vendor fraud, account takeover, and AI-generated attacks legacy gateways miss.
Email Security & Email Protection Services | Barracuda NetworksRetrieved 2026-10-23T04:02:38Z
Barracuda Email Protection Effortless defense against complex threats with AI-powered email security.
Cyber Security Incident Response for Email Threats | Barracuda NetworksRetrieved 2026-10-23T04:02:38Z
New Incident Response Account Takeover Protection Domain Fraud Protection (DMARC)
SpamTitan Email Security, Email Protection and Email FilteringRetrieved 2026-10-23T04:36:37Z
SpamTitan is an award-winning email security software that protects your organization from online threats.
ESET Cloud Office Security Free Trial | ESETRetrieved 2026-10-23T05:12:26Z
Your trial includes: Advanced preventive protection for Microsoft 365 applications Protection for emails in Exchange Online and files in OneDrive cloud storage Powerful spam filtering, anti-malware scanning and anti-phishing technologies
Kaspersky Security for Mail Server - Enterprise Email Protection | KasperskyRetrieved 2026-10-23T05:12:24Z
Kaspersky Security for Mail Server (KSMS) provides trusted and secure corporate email exchange, countering spam, email-borne infections, all forms of phishing, business email compromise (BEC), QR code attacks, and other threats.

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