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48 Best OPSWAT MetaDefender Email Security Alternatives & Competitors (2026) | CybersecTools

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OPSWAT MetaDefender Email Security

Best OPSWAT MetaDefender Email Security Alternatives & Competitors in 2026

Top picks: ESET Cloud Office Security, GLIMPS Email Security for M365, SpamTitan for Office 365 — plus 45 more compared.

OPSWAT MetaDefender Email Security Alternatives and Competitors

OPSWAT MetaDefender Email Security is a commercial Email Security Platforms tool developed by OPSWAT. Security professionals most commonly compare it with . All 48 alternatives are matched by shared capabilities, tags, and NIST CSF 2.0 coverage.

ESET Cloud Office Security

, GLIMPS Email Security for M365

, SpamTitan for Office 365

, Microsoft Defender for Office 365

, and SorbSecurity Cloud Email Security

Data verified May 2026

View OPSWAT MetaDefender Email Security All Email Security Compare Stacks Market Map Explore All Tools

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Top OPSWAT MetaDefender Email Security Alternatives and Competitors at a Glance

A closer look at the 8 most relevant alternatives and competitors to OPSWAT MetaDefender Email Security, including their key features and shared capabilities.

ESET Cloud Office Security

Commercial

Email Security Platforms

Cloud email security for Microsoft 365 and Google Workspace applications

Key features: Spam filtering, Anti-malware scanning, Anti-phishing protection, Antispoofing protection, Homoglyph protection

View ESET Cloud Office Security|ESET Cloud Office Security alternatives|Compare ESET Cloud Office Security

GLIMPS Email Security for M365

Commercial

Email Security Platforms

AI-based email security for M365 with phishing, BEC & malware detection.

Key features: BEC detection and spoofing identification, SPF/DKIM/DMARC header analysis, 500+ specialized email detection rules, Anti-spam and mass advertising detection, Zero-day attachment detection via Deep Learning

View GLIMPS Email Security for M365|GLIMPS Email Security for M365 alternatives|Compare GLIMPS Email Security for M365

SpamTitan for Office 365

Commercial

Email Security Platforms

Email security layer for M365 with anti-phishing, sandboxing, and DLP.

Key features: AI-driven anti-phishing with zero-day threat detection using Bayesian analysis, heuristics, and machine learning, Dual anti-virus scanning for inbound and outbound emails, Email sandboxing for advanced threat analysis, URL filtering against blacklists of known malicious sources, Greylisting to block emails from unknown or suspicious sources

View SpamTitan for Office 365|SpamTitan for Office 365 alternatives|Compare SpamTitan for Office 365

Microsoft Defender for Office 365

Commercial

Email Security Platforms

Email and collaboration security for Microsoft 365 environments

Key features: AI-powered sentiment analysis for email filtering, Inline protection against malicious links and attachments in Outlook and Teams, Real-time detonation of attachments and links, Automated BEC attack disruption with user disabling and device isolation, Post-delivery removal of malicious emails

View Microsoft Defender for Office 365|Microsoft Defender for Office 365 alternatives|Compare Microsoft Defender for Office 365

SorbSecurity Cloud Email Security

Commercial

Email Security Platforms

Cloud-based email security platform protecting against phishing & ransomware

Key features: Anti-spam engine with investigation tools, Cloud sandbox for file analysis, URL protection and scanning, Email archiving with AI-powered search and summarization, Email encryption for message protection

View SorbSecurity Cloud Email Security|SorbSecurity Cloud Email Security alternatives|Compare SorbSecurity Cloud Email Security

Trend Micro Trend Vision One™

Commercial

Email Security Platforms

AI-powered email and collaboration security platform for threat detection

Key features: AI-driven phishing and BEC detection, Writing style analysis and anomaly detection, Sender behavior analysis, Sandbox malware analysis, Real-time user risk visibility and monitoring

View Trend Micro Trend Vision One™|Trend Micro Trend Vision One™ alternatives|Compare Trend Micro Trend Vision One™

AnubisNetworks Email Security

Commercial

Email Security Platforms

Email security platform protecting against fraud, malware, and spam threats

Key features: Anti-fraud protection, Data loss prevention (DLP), Anti-spoofing detection, Sandbox-based malware analysis, Email authentication analysis (DMARC, MTA-STS, DANE, DKIM, SPF)

View AnubisNetworks Email Security|AnubisNetworks Email Security alternatives|Compare AnubisNetworks Email Security

Bitdefender GravityZone Security for Exchange

Commercial

Email Security Platforms

Email security for Microsoft Exchange servers with antispam and antimalware.

Key features: Multi-layer antispam and anti-phishing protection, Antivirus and antimalware scanning, Inbound and outbound email traffic filtering, Attachment and content filtering, Advanced behavioral analysis

View Bitdefender GravityZone Security for Exchange|Bitdefender GravityZone Security for Exchange alternatives|Compare Bitdefender GravityZone Security for Exchange

All 48 Alternatives & Competitors to OPSWAT MetaDefender Email Security

Compare

ESET Cloud Office Security

Cloud email security for Microsoft 365 and Google Workspace applications

Email Security Platforms

Compare

GLIMPS Email Security for M365

AI-based email security for M365 with phishing, BEC & malware detection.

Email Security Platforms

Compare

SpamTitan for Office 365

Email security layer for M365 with anti-phishing, sandboxing, and DLP.

Email Security Platforms

Compare

Microsoft Defender for Office 365

Email and collaboration security for Microsoft 365 environments

Email Security Platforms

Compare

SorbSecurity Cloud Email Security

Cloud-based email security platform protecting against phishing & ransomware

Email Security Platforms

Compare

Trend Micro Trend Vision One™

AI-powered email and collaboration security platform for threat detection

Email Security Platforms

Compare

AnubisNetworks Email Security

Email security platform protecting against fraud, malware, and spam threats

Email Security Platforms

Compare

Bitdefender GravityZone Security for Exchange

Email security for Microsoft Exchange servers with antispam and antimalware.

Email Security Platforms

Compare

Bitdefender GravityZone Extended Email Security

Cloud-native email security platform with SEG and API-based protection

Email Security Platforms

Compare

VIPRE Integrated Email Security (IES)

Email security platform for Microsoft 365 with AI-based threat detection

Email Security Platforms

Compare

Mimecast Collaboration Threat Protection

Secures Microsoft Teams, SharePoint & OneDrive from malware and phishing

Email Security Platforms

Compare

API-based email security platform for Microsoft 365 environments

Email Security Platforms

Compare

ConnectWise Email Security

Email security platform with AI threat detection, BEC protection, and DLP

Email Security Platforms

Compare

Blaze Networks Blaze Screen

Managed email filtering service with threat detection and spam prevention

Email Security Platforms

Compare

Cisco Secure Email Threat Defense

Email threat protection for Microsoft 365 with advanced detection capabilities

Email Security Platforms

Compare

Fortinet FortiMail Email Security

AI-powered email security platform protecting against phishing, BEC, and ATO

Email Security Platforms

Compare

Cellopoint Cloud Email Security Solution

Cloud-based email security platform protecting against phishing, ransomware, BEC

Email Security Platforms

Compare

odix FileWallTM for Microsoft 365

File-based threat protection for Microsoft 365 using CDR technology

Email Security Platforms

Compare

Mimecast Advanced Email Security

Email security platform protecting M365 & Google Workspace from threats

Email Security Platforms

Compare

xorlab Email Security

AI-driven email security platform for detecting advanced email threats

Email Security Platforms

Compare

TitanHQ Cybersecurity Bundles

Bundled cybersecurity solutions for MSPs and end users with email protection

Email Security Platforms

Compare

Egress Intelligent Email Security

Cloud email security platform for inbound/outbound threat detection & DLP

Email Security Platforms

Compare

KnowBe4 Cloud Email Security

AI-driven email security platform for Microsoft 365 inbound/outbound threats

Email Security Platforms

Compare

Vircom Email Security

Email security platform enhanced with multi-tenant mgmt & automation tools

Email Security Platforms

Compare

Group-IB Business Email Protection

Email security platform protecting against phishing, malware, and BEC attacks

Email Security Platforms

Compare

Abnormal Security Cloud-based email security platform

AI-powered email security platform protecting against phishing, BEC, and ATO

Email Security Platforms

Compare

Cybonet Mail Secure

Email security gateway with anti-spam, AV, sandboxing, and DLP.

Email Security Platforms

Compare

SourcetekIT Email Security Service

Managed email security service for Office 365 using Cisco's platform.

Email Security Platforms

Compare

Cloud-native AI email security platform with LLM-based threat detection and DLP.

Email Security Platforms

Compare

Ocean Agentic Email Security Platform

Agentic AI email security platform that investigates emails pre-delivery.

Email Security Platforms

Compare

Cloudflare Cloud Email Security

Cloudflare Cloud Email Security is a cloud-based email protection service that safeguards organizations against phishing, malware, spam, and other email-borne threats through integrated threat detection and prevention capabilities.

Email Security Platforms

Compare

Email security platform with phishing/BEC protection and MDR/XDR integration

Email Security Platforms

Compare

TrustLayer Mail

Email security platform with inline threat protection and compliant archiving

Email Security Platforms

Compare

Trustifi AI Powered Email Security

AI-powered email security platform for threat detection and compliance

Email Security Platforms

Compare

Email security gateway protecting against phishing, BEC, and email-borne threats

Email Security Platforms

Compare

MX Layer Email Security

Cloud-based email security platform with AI-powered threat detection

Email Security Platforms

Compare

Proofpoint Threat Protection

Email security platform with AI-based threat detection and DLP capabilities

Email Security Platforms

Compare

ESET Mail Security

Email security for Microsoft Exchange servers with anti-spam and anti-malware

Email Security Platforms

Compare

Broadcom Symantec Email Security

Enterprise email security platform for cloud and on-premise deployments

Email Security Platforms

Compare

xorlab Attachment Sandbox

Sandboxes email attachments to detect malicious behavior via dynamic analysis

Email Security Platforms

Compare

Cybersentriq MX Email Threat Protection

MX-based email security platform using AI to block spam, phishing & malware

Email Security Platforms

Compare

Infonaligy Proofpoint Email Security

Managed Proofpoint email security service for phishing & BEC protection.

Email Security Platforms

Compare

Cloud-based anti-spam and antivirus email filtering with AI threat detection.

Email Security Platforms

Compare

TitanHQ Security Bundles

Tiered cybersecurity bundles combining email, DNS, backup & SAT.

Email Security Platforms

Compare

Unified AI-powered cybersecurity & cyber insurance platform for SMBs.

Email Security Platforms

Compare

CDR solution that sanitizes files and emails by disassembling and rebuilding them.

Email Security Platforms

Compare

AI-Powered Email Security & DMARC Protection

AI-powered DMARC monitoring and email authentication security platform

Email Security Platforms

Compare

INKY Behavioral Email Security Platform

Behavioral email security platform protecting inbound, outbound, and internal mail

Email Security Platforms

Also compare alternatives to:

ESET Cloud Office Security alternatives GLIMPS Email Security for M365 alternatives SpamTitan for Office 365 alternatives Microsoft Defender for Office 365 alternatives SorbSecurity Cloud Email Security alternatives Trend Micro Trend Vision One™ alternatives AnubisNetworks Email Security alternatives Bitdefender GravityZone Security for Exchange alternatives Bitdefender GravityZone Extended Email Security alternatives VIPRE Integrated Email Security (IES) alternatives Mimecast Collaboration Threat Protection alternatives Mesh 365 alternatives

Compare OPSWAT MetaDefender Email Security with:

OPSWAT MetaDefender Email Security vs ESET Cloud Office Security OPSWAT MetaDefender Email Security vs GLIMPS Email Security for M365 OPSWAT MetaDefender Email Security vs SpamTitan for Office 365 OPSWAT MetaDefender Email Security vs Microsoft Defender for Office 365 OPSWAT MetaDefender Email Security vs SorbSecurity Cloud Email Security OPSWAT MetaDefender Email Security vs Trend Micro Trend Vision One™OPSWAT MetaDefender Email Security vs AnubisNetworks Email Security OPSWAT MetaDefender Email Security vs Bitdefender GravityZone Security for Exchange

OPSWAT MetaDefender Email Security Alternatives FAQ

Common questions security professionals ask when evaluating alternatives and competitors to OPSWAT MetaDefender Email Security.

What are the best alternatives to OPSWAT MetaDefender Email Security?

The most popular alternatives to OPSWAT MetaDefender Email Security include ESET Cloud Office Security, GLIMPS Email Security for M365, SpamTitan for Office 365, Microsoft Defender for Office 365, and SorbSecurity Cloud Email Security. These Email Security Platforms tools offer similar capabilities and are frequently compared by security professionals evaluating their options.

How many alternatives to OPSWAT MetaDefender Email Security are available?

There are 48 alternatives to OPSWAT MetaDefender Email Security listed on CybersecTools, all within the Email Security Platforms category. Each alternative is matched based on shared capabilities, tags, and NIST CSF coverage areas.

Is OPSWAT MetaDefender Email Security free or commercial?

OPSWAT MetaDefender Email Security is a commercial Email Security Platforms tool. It requires a paid license or subscription. Both free and commercial alternatives are available for comparison.

What type of tool is OPSWAT MetaDefender Email Security?

OPSWAT MetaDefender Email Security is a Email Security Platforms tool within the broader Email Security category. It is used by security professionals for email security platforms capabilities and can be compared against 48 similar tools.

Have more questions? Browse our categories or search for specific tools.

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