The product
Microsoft Defender for Office 365
by Microsoft
Email and collaboration security for Microsoft 365 environments
Microsoft Defender for Office 365 alternatives and competitors
Microsoft Defender for Office 365 is a commercial Email Security Platforms solution made by Microsoft. The closest matches by shared tags and NIST CSF 2.0 coverage are Fortra Email Security & Anti-Phishing, Cisco Secure Email Threat Defense, KnowBe4 Cloud Email Security, ConnectWise Email Security, and ID Agent Graphus. All 42 alternatives on this page are ranked the same way.
The closest Microsoft Defender for Office 365 alternatives
These 8 solutions overlap most with Microsoft Defender for Office 365. Each row says what the product does and, when the overlap is big enough, which capabilities it shares.
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Email security platform protecting against phishing, BEC, and data loss
Email Security PlatformsCommercialKey features: DMARC email authentication and enforcement, Business email compromise detection, Spear phishing protection, Account takeover detection, Data loss prevention for sensitive data
All 42 products like Microsoft Defender for Office 365
Email security platform protecting against phishing, BEC, and data loss
Email threat protection for Microsoft 365 with advanced detection capabilities
AI-driven email security platform for Microsoft 365 inbound/outbound threats
Email security platform with AI threat detection, BEC protection, and DLP
AI-powered anti-phishing platform for Microsoft 365 & Google Workspace.
AI-powered email security platform protecting against phishing, BEC, and ATO
Cloud-based email security platform protecting against phishing, ransomware, BEC
Email security platform protecting M365 & Google Workspace from threats
AI-powered email security operations platform for automated threat triage
Cloud email security for Microsoft 365 and Google Workspace applications
Cloud-native email security platform with SEG and API-based protection
Enterprise email security platform for cloud and on-premise deployments
Email security platform protecting against phishing, malware, and exploits
Email security platform for Microsoft 365 with AI-based threat detection
ATP solution for SaaS & email with AI-driven detection & auto-response
Email security platform enhanced with multi-tenant mgmt & automation tools
AI-based email security for M365 with phishing, BEC & malware detection.
Agentic AI email security platform that investigates emails pre-delivery.
Cloud security platform for M365 covering email, backup, and awareness.
Behavioral email security platform protecting inbound, outbound, and internal mail
Email security platform with phishing/BEC protection and MDR/XDR integration
Email security platform with inline threat protection and compliant archiving
Cloud-native email security platform for phishing detection and response
AI-powered email security platform for threat detection and compliance
Email security platform with AI-based threat detection and DLP capabilities
AI-powered email security platform detecting threats across email and messaging
Bundled cybersecurity solutions for MSPs and end users with email protection
AI-powered email security platform with behavioral detection and automation
Managed Proofpoint email security service for phishing & BEC protection.
Tiered cybersecurity bundles combining email, DNS, backup & SAT.
Email gateway that blocks spam, phishing and malware before inbox delivery, made
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.
Cloud-based email security platform protecting against phishing & ransomware
All-in-one email security platform for threat protection and compliance
Cloud-based email security platform with AI-powered threat detection
AI-driven email security platform for detecting advanced email threats
AI-powered email and collaboration security platform for threat detection
Email security platform protecting against fraud, malware, and spam threats
Cloud workspace security platform for email, files, and account protection
AI-powered DMARC monitoring and email authentication security platform
Alternatives to each of these
Fortra Email Security & Anti-Phishing alternativesCisco Secure Email Threat Defense alternativesKnowBe4 Cloud Email Security alternativesConnectWise Email Security alternativesID Agent Graphus alternativesFortinet FortiMail Email and Workspace Security alternativesCellopoint Cloud Email Security Solution alternativesMimecast Advanced Email Security alternativesAbnormal AI Security Mailbox alternativesESET Cloud Office Security alternativesBitdefender GravityZone Extended Email Security alternatives
Other Microsoft products
Compare Microsoft Defender for Office 365 with
Microsoft Defender for Office 365 vs Fortra Email Security & Anti-PhishingMicrosoft Defender for Office 365 vs Cisco Secure Email Threat DefenseMicrosoft Defender for Office 365 vs KnowBe4 Cloud Email SecurityMicrosoft Defender for Office 365 vs ConnectWise Email SecurityMicrosoft Defender for Office 365 vs ID Agent GraphusMicrosoft Defender for Office 365 vs Fortinet FortiMail Email and Workspace SecurityMicrosoft Defender for Office 365 vs Cellopoint Cloud Email Security SolutionMicrosoft Defender for Office 365 vs Mimecast Advanced Email Security
Microsoft Defender for Office 365 Alternatives FAQ
Common questions when weighing alternatives to Microsoft Defender for Office 365.
The closest matches to Microsoft Defender for Office 365 by shared tags and NIST CSF 2.0 coverage are Fortra Email Security & Anti-Phishing, Cisco Secure Email Threat Defense, KnowBe4 Cloud Email Security, ConnectWise Email Security, and ID Agent Graphus. All of them are Email Security Platforms products.
This page shows 42 alternatives to Microsoft Defender for Office 365, all in the Email Security Platforms category. Each one is matched on shared tags and NIST CSF 2.0 areas, and the closest matches rank first.
Microsoft Defender for Office 365 is a commercial Email Security Platforms product. It needs a paid license or subscription. Only commercial alternatives are listed here. Free and open source products are under /free.
Microsoft Defender for Office 365 is a Email Security Platforms product in the Email & Messaging Security category. You can compare it with the 42 other Email Security Platforms products on this page.
