The Top 12+ Email Security Solutions For Microsoft 365

Abnormal AI is a cloud-native email security platform that leverages behavioral AI to safeguard against various inbound threats, including business email compromise, spear phishing, and malware, as well as internal account takeovers. As a Microsoft Preferred Solution, it integrates seamlessly with Microsoft 365, enhancing security without necessitating changes to MX records or disabling Microsoft’s native security features.

Why We Picked Abnormal AI: We appreciate Abnormal’s use of behavioral AI to establish user communication baselines and analyze emails for over 45,000 indicators of compromise. Its native integration with Microsoft 365 allows for rapid deployment and unified management.

Abnormal AI Best Features: Key features include protection against inbound threats like business email compromise and spear phishing, as well as detection of internal account takeovers. It uses behavioral AI to analyze emails, rewrite URLs in suspicious messages, and insert warning banners. The platform also scans internal communications for malicious activity, automatically logs out compromised accounts, and triggers Microsoft 365 password resets. Integrations include a native API with Microsoft 365.

What’s great:

• Rapid deployment with Microsoft 365 without MX record changes
• Powerful threat detection using behavioral AI
• Unified email security management via one console
• Proactive internal account takeover prevention
• Engaged and responsive support team

What to consider:

• May require additional configuration for non cloud-based email systems

Pricing: For detailed pricing, contact Abnormal AI directly.

Who it’s for: Abnormal AI is ideal for organizations using Microsoft 365 who seek robust email security with easy deployment and management. It is particularly beneficial for businesses focused on protecting against sophisticated email threats.

IRONSCALES offers robust protection against phishing, credential theft, and business email compromise for Office 365 users. As a fully cloud-based solution, it operates at the mailbox level to identify and mitigate suspicious email activity.

Why We Picked IRONSCALES: We like its seamless integration with Office 365 and its effective phishing detection and prevention, which outperforms Microsoft Defender for O365 (ATP) according to Expert Insights tests.

IRONSCALES Best Features: Key features include phishing detection and prevention, protection against malicious links and attachments, business email compromise prevention, and security awareness training tools. It uses multiple anti-virus engines and machine learning technologies combined with human threat intelligence to identify and remove malicious emails. IRONSCALES integrates directly with Office 365 via Graph API, requiring no reconfigurations or new mail flow rules, and also offers protection for Microsoft Teams.

What’s great:

• Outperforms Microsoft Defender for O365 in phishing detection
• Seamless integration with Office 365 environments
• Easy deployment with no MX record changes needed
• Provides security awareness training tools
• Offers protection for Microsoft Teams

What to consider:

• Focused primarily on Office 365 and Google Workspace, although Exchange is supported

Pricing: For pricing details, visit the IRONSCALES website directly.

Who it’s for: IRONSCALES is ideal for businesses using Office 365 seeking a specialized, easy-to-deploy solution to protect against phishing and business email compromise.

Material Security delivers an automated detection and response toolkit for Microsoft 365, protecting your emails, documents, and accounts. It combines email security, data security, identity protection, and configuration management in a single platform

Why We Picked Material Security: Material provides automated protection for all accounts, users and devices within M365. Material Security’s AI-driven defenses stop phishing, BEC, and malware missed by Microsoft’s filters. The platform also protects sensitive data in files and mailboxes, detects and contains account takeovers, and reduces risk across your environment. 

Material Security Best Features: The platform combines AI detection and threat research to block phishing, BEC, and malware, enhanced by user reports and custom keyword rules to swiftly remove malicious emails. Material scans historical emails for sensitive data—like tax documents or invoices—and enforces MFA to protect it during breaches. It also spots password reset links and 2FA codes in real time, adding MFA to prevent account takeovers.

What’s great:

• Stops phishing, BEC, and malware with automatic email detection and response
• Secures sensitive inbox data with MFA, even if accounts are breached
• Blocks 2FA scams and identity risks instantly
• Tracks email rules and usage in a comprehensive admin console
• Integrates with SIEM, SOAR, and identity tools
• Admins can manage multiple tenants and domains, accounts, groups, and generate audit logs
• Can be deployed across all users, or just for a subset of your VIP executives
• Deploys in 30 minutes via API, no MX-record changes

What to consider:

• Best suited for teams looking for a comprehensive toolkit for securing M365

Pricing: Contact Material Security for details.

Who it’s for: Material Security is ideal for organizations using Microsoft 365 or Google Workspace seeking a comprehensive email security solution that protects against advanced threats and secures sensitive data. It suits businesses of all sizes needing robust email security and governance.

ESET Cloud Office Security is a robust cybersecurity solution designed to enhance the security of Microsoft Office 365 applications. It provides comprehensive protection against spam, malware, ransomware, and targeted attacks like phishing and spear-phishing across Exchange Online, Teams, OneDrive, and SharePoint.

Why We Picked ESET Cloud Office Security: We appreciate its holistic approach to Office 365 security, offering strong anti-malware and virus scanning across all Microsoft applications. Its ability to customize threat protection policies at various levels adds significant value.

ESET Cloud Office Security Best Features: Key features include anti-malware for Exchange Online, Teams, OneDrive, and SharePoint, scanning for malicious URLs and attachments, automatic quarantine or deletion of harmful content, customizable threat protection policies, and detailed reporting and logging. It integrates seamlessly with Office 365 for quick deployment.

What’s great:

• Comprehensive protection across all Office 365 applications
• Strong anti-malware and virus scanning capabilities
• Customizable threat protection policies at user, group, and organization levels
• Easy deployment and integration with Office 365
• Detailed reporting and logging features

What to consider:

• Best suited for SMBs to midsized organizations looking for email protection

Pricing: For detailed pricing, visit ESET’s website directly.

Who it’s for: ESET Cloud Office Security is ideal for organizations seeking a comprehensive security solution for their Microsoft Office 365 environment, enhancing protection beyond email to include Teams, OneDrive, and SharePoint.

TitanHQ Email Security is a robust email security solution that offers comprehensive protection against advanced threats such as CEO impersonation, phishing, malware, and ransomware. It can be deployed as a cloud-based or on-premise solution, providing effective safeguards for Office 365 email accounts with features like inbound email filtering, data loss protection, and encryption.

Why We Picked TitanHQ Email Security: We like the solution’s multi-layered threat protection and its seamless integration with Office 365, ensuring robust security and ease of deployment.

TitanHQ Email Security Best Features: Key features include multi-layered threat protection, inbound and outbound email security, CEO impersonation protection, phishing and ransomware defenses, link analysis, attachment sandboxing, zero-day attack protection, mail spooling, spoofing protection, SPF/DKIM/DMARC checking, data loss prevention, email encryption, and Office 365 backups. It integrates seamlessly with Office 365.

What’s great:

• Provides far more effective email filtering than default Office 365 systems
• Offers granular control and customizable policies
• Ensures business continuity with Office 365 backups
• Easy to deploy and manage
• Cost-effective pricing

What to consider:

• TitanHQ is best suited for SMBs and MSPs

Pricing: TitanHQ Email Security is available from $1.08 USD/user/month (based on 250 users).

Who it’s for: TitanHQ Email Security is ideal for SMBs, enterprises, and MSPs seeking a powerful, easy-to-manage email security solution that integrates seamlessly with Office 365.

Check Point Harmony Email & Collaboration (formerly Avanan) is a cloud-native email security solution designed to enhance the protection of Microsoft 365 and other collaboration platforms. It offers a comprehensive suite of tools to defend against phishing, malware, account takeovers, and data loss, integrating seamlessly via API.

Why We Picked Check Point Harmony Email & Collaboration: We value Check Point’s advanced machine learning, which analyzes numerous indicators per email to detect and neutralize sophisticated phishing attacks. Its direct API integration with Microsoft 365 provides a critical layer of enhanced security beyond native defenses.

Check Point Harmony Email & Collaboration Key Features: This solution scans all inbound, outbound, and internal communication traffic to identify and block advanced threats, including zero-day exploits and ransomware. Its features include anti-phishing, malware sandboxing, URL protection, account takeover prevention, data loss prevention (DLP), and encryption. Check Point Harmony Email & Collaboration integrates seamlessly with collaboration suites like Microsoft 365 through direct API connections, offering granular reporting and centralized controls via a cloud-based administration console.

What’s Great:

• Employs advanced machine learning algorithms to identify subtle phishing attempts.
• Provides comprehensive protection against a wide spectrum of communication-borne threats.
• Offers seamless and robust API-based integration with platforms like Microsoft 365.
• Delivers detailed insights through comprehensive reporting and granular administrative controls.
• Significantly strengthens the inherent security measures within cloud collaboration environments.

What To Consider:

• Organizations should ensure their collaboration platform aligns with the API integration requirements for optimal functionality.

Pricing: For detailed and tailored pricing information, please contact Check Point directly through their website.

Best Suited For: Check Point Harmony Email & Collaboration is ideally suited for organizations that rely on cloud collaboration platforms like Microsoft 365 and require a robust, multi-layered security solution to effectively protect against advanced and evolving threats while ensuring data security and regulatory compliance.

Cloudflare Email Security is a robust email security solution integrated within Cloudflare’s comprehensive SASE platform. It offers advanced protection against sophisticated email threats, including phishing, email compromise, and credential theft, leveraging Cloudflare’s extensive threat intelligence.

Why We Picked Cloudflare Email Security: We appreciate its seamless integration with Microsoft 365 via API, which simplifies deployment and configuration. Additionally, its end-to-end phishing triage and response capabilities provide comprehensive threat management.

Cloudflare Email Security Best Features: Key features include end-to-end phishing triage and response, insider threat detection, post-delivery email scanning, visibility into compromised accounts and domains, and brand impersonation protection. It integrates with SIEM and SOAR platforms and uses Cloudflare’s Browser Isolation for protection against malicious web links.

What’s great:

• Effective protection against advanced email threats
• Scalable cloud-native architecture
• Leverages Cloudflare’s market-leading threat intelligence
• Easy integration with Microsoft 365
• Automatic blocking and quarantining of malicious content

What to consider:

• May be best suited for existing Cloudflare security customers

Pricing: For detailed pricing, visit Cloudflare’s website directly.

Who it’s for: Cloudflare Area1 is ideal for businesses already using Cloudflare services, particularly those with Microsoft 365 environments seeking a scalable, cloud-native email security solution.

Microsoft Defender for Office 365 is Microsoft’s security platform designed for enterprise customers using Office 365. It provides robust protection against malicious email threats, including phishing, malicious URLs, and threats within collaboration tools.

Why We Picked Microsoft Defender for Office 365: We like its seamless integration with Office 365, requiring no additional configuration. It also offers comprehensive protection across SharePoint, OneDrive, and Teams.

Microsoft Defender for Office 365 Best Features: Key features include Safe Attachments for scanning email attachments, Safe Links for real-time URL verification, anti-phishing with machine learning and impersonation detection, threat protection policies, and automated investigation and response capabilities in the advanced tier. It integrates directly with Office 365, protecting SharePoint, OneDrive, and Teams.

What’s great:

• Seamless integration with Office 365 without additional configuration
• Comprehensive protection across multiple Office 365 applications
• Advanced threat detection with machine learning and impersonation algorithms
• Automated investigation and response in the advanced tier

What to consider:

• Included only in higher-tier Office 365 subscriptions or as an add-on

Pricing: Microsoft Defender for Office 365 is included in some Office 365 subscriptions like Enterprise E5, or available as an add-on.

Who it’s for: Microsoft Defender for Office 365 is ideal for enterprises already using Office 365 who need a comprehensive, seamlessly integrated security solution.

Mimecast Integrated Cloud Email Security is a robust solution designed specifically for securing Microsoft 365 environments. It integrates seamlessly via an API, scanning emails directly within Microsoft 365 to protect against a variety of sophisticated email threats.

Why We Picked Mimecast Integrated Cloud Email Security: We like its ability to scan emails within Microsoft 365 without MX redirection, and its comprehensive threat detection capabilities that protect against phishing, business email compromise, and credential theft.

Mimecast Integrated Cloud Email Security Best Features: Key features include direct email scanning within Microsoft 365, protection against sophisticated email threats, internal threat detection, and remediation. It also offers mailbox-level compliant archiving, e-discovery, legal hold, Office 365 disaster recovery, email encryption, DNS filtering, and Office 365 migration tools. Integrations include seamless compatibility with Microsoft 365 and support for Mimecast’s Security Awareness Training.

What’s great:

• Direct integration with Microsoft 365 for streamlined security
• Comprehensive protection against a range of email threats
• Easy deployment and minimal configuration required
• Internal threat detection and remediation capabilities
• Compliant email archiving and e-discovery support

What to consider:

• Some advanced features might need specific setup

Pricing: Contact Mimecast directly for detailed pricing information.

Who it’s for: Mimecast Integrated Cloud Email Security is best suited for organizations using Microsoft 365 who need a comprehensive and integrated email security solution that enhances protection and supports compliance requirements.

Proofpoint Core Email Protection is a market-leading email security platform engineered to defend against the complete spectrum of email attacks. Proofpoint’s comprehensive email security portfolio includes a secure email gateway, ML/AI-powered automated remediation, security awareness training, email encryption, and email archiving for any email platform.

Why We Picked Proofpoint Core Email Protection: Proofpoint’s key advantage is the Nexus Threat Intelligence platform, which aggregates and analyzes data from over 3 trillion emails annually. This vast dataset enables robust, crowd-sourced protection against even the most sophisticated and novel email threats. The platform also offers flexible deployment options and advanced features like integrated email DLP.

Proofpoint Core Email Protection Best Features: Key features include real-time, multi-layered detection of phishing and malware, automated investigation and remediation workflows, and highly granular policy configuration. It also provides robust DMARC/DKIM/SPF enforcement and integrated data loss prevention (DLP). The platform supports multipke deployment models: on-premises, cloud-based, Secure Email Gateway (SEG), and API-driven integrations, including seamless integration with Google Workspace via APIs.

What’s Great:

• Leverages industry-leading threat intelligence derived from the analysis of 3 trillion emails per year
• Effectively blocks 99.99% of phishing, BEC, and malware threats
• Offers a market-leading, integrated email security portfolio encompassing archiving, encryption, security awareness training, and DLP
• Supports flexible deployment options, including on-premises, cloud, SEG, and API integrations.
• Provides an easy-to-manage yet highly granular platform for precise security control

What To Consider:

• Proofpoint Core Email Protection is designed for organizations with 500 or more users. Proofpoint Essentials serves as a alternative for smaller teams.

Pricing: Contact Proofpoint directly for specific pricing details, as costs are determined by organizational size and chosen deployment options.

Best Suited For: Proofpoint Core Email Protection is best suited for enterprises with over 500 users seeking a trusted, enterprise-grade email security and compliance platform. It excels at targeting and mitigating advanced email threats such as spear-phishing and ransomware and currently protects a significant majority (85%) of Fortune 100 organizations.

Proofpoint Essentials is a cloud-based secure email gateway that safeguards small and medium-sized businesses using Office 365 from email threats. It combines email security with archiving, encryption, and data loss prevention to offer comprehensive protection against spam, malware, and phishing attacks.

Why We Picked Proofpoint Essentials: We appreciate its multi-layered email security engines and seamless integration with Office 365, ensuring robust protection without disrupting existing workflows.

Proofpoint Essentials Best Features: Key features include multi-layered email security, URL Defense (SafeLinks), anti-virus engines, email archiving, encryption, and data loss prevention. It also offers advanced BEC defense with Supernova detection, predictive URL defense, and one-click message removal. Integrations include easy deployment with Office 365, allowing for automatic scanning and quarantine of infected emails.

Proofpoint have added deployed inline filtering as a deployment option for M365, so you can either deploy via MX record redirection or inline filtering. The inline filtering option simplyfies the deployment process and can be completed in less than 5 minutes.

What’s great:

• High threat detection accuracy
• Easy integration with Office 365 – now via API deployment
• Comprehensive protection against email threats
• User-friendly features like one-click message removal
• Advanced BEC defense with Supernova detection

What to consider:

• Best suited for SMBs – Proofpoint also offers an enterprise secure email gateway

Pricing: For detailed pricing, visit Proofpoint’s website.

Who it’s for: Proofpoint Essentials is best suited for small to medium-sized businesses using Office 365 who need robust, easy-to-deploy email security solutions with advanced threat protection features.

Sublime Security is a programmable cloud security platform for Microsoft 365 that blocks inbound email attacks, hunts for threats, and auto-triages end user reports. It evaluates all email messages using a query language (MQL) and takes actions like quarantining or inserting warning banners based on admin controls.

Why We Picked Sublime Security: Sublime focusses on for its transparent, customizable email filtering rules, avoiding a ‘black box’ approach when it comes to email filtering. We also rate the granular remediation automations and auto-triage that minimize manual email investigation for Microsoft 365 users.

Sublime Security Best Features: Key features include real-time phishing and malware detection, transparent automated remediations, and AI-powered policy automation. The AI-assisted policy builder simplifies rule creation using MQL and GenAI. Proactive AI-powered threat hunting discovers missed attacks, with detailed analytics ensuring transparency and compliance.

What’s great:

• Transparent, customizable policies using MQL and GenAI
• Real-time detection of phishing, malware, and BEC
• Adaptive threat engine to minimize false positives
• Proactive AI-powered threat hunting for missed attacks
• Automated remediation and end user investigation workflows
• Email/Slack alerts for suspicious messages
• Cloud-native and self-hosted deployments with IMAP/API integration

What to consider:

• Best suited for technical teams able to customize the solution and leverage custom remediation rules.

Pricing: A free version is available for single email accounts; contact Sublime Security for enterprise pricing.

Who it’s for: Sublime Defend is ideal for Microsoft 365 enterprises looking for customizable, transparent email security controls with automated remediations and robust protection against phishing, malware, and BEC.