Security Stack Logo
Abnormal Email Security logo

Email Security

Abnormal Email Security

Behavioral AI cloud email security for BEC, phishing, and account takeover via API integration.

Abnormal Email Security Overview

What it does

Abnormal is an AI-native email security platform that protects enterprises from advanced email threats through behavioral analysis of identity, communication patterns, and content. Unlike traditional secure email gateways that rely on threat intelligence and static rules, Abnormal deploys via API-based architecture that connects directly to Microsoft 365 and Google Workspace without requiring MX record changes, enabling deployment in under 60 seconds while accessing 10x more behavioral data than legacy solutions.

How it works

The platform automatically baselines normal activity through its Abnormal Behavior Platform to understand identity, relationships, and communication patterns across people, vendors, apps, and tenants. This behavioral AI foundation enables precise detection of never-before-seen attacks including Business Email Compromise (BEC), vendor fraud, credential phishing, and account takeovers by identifying deviations from established patterns, with automated remediation that removes threats within milliseconds and reduces SOC workload by 95%.

Credentials and traction

Abnormal holds SOC 2 Type II, ISO 27001, ISO 27701, and ISO/IEC 42001 certifications and FedRAMP Moderate authorization. It was named a Leader in the 2025 Gartner Magic Quadrant for Email Security for the second consecutive year, positioned furthest right on the Vision axis, and carries a 99% "Would Recommend" rating on Gartner Peer Insights. Abnormal was named to the Forbes 2025 Cloud 100 and the 2025 CNBC Disruptor 50, and protects more than 3,200 organizations.

Key Capabilities

mapped to solution categories
Integrated Cloud Email Security (ICES)

Detects signs of internal mailbox compromise (anomalous login geography, mail forwarding rule creation, unusual send volume), and can trigger automated session revocation.

Connects to Microsoft 365 or Google Workspace via native APIs for visibility into internal and delivered mail, enabling post-delivery clawback without changing MX records.

Builds per-user and per-vendor communication baselines from historical email patterns to detect anomalous content, timing, or sender behavior without relying on signatures or blocklists.

Separates newsletters and bulk mail from threats by routing them to dedicated folders, refining classification from how each user files messages.

Analyzes email body text semantically to detect social engineering, pretexting, and urgency manipulation in messages that contain no malicious attachments or URLs.

Automates the intake, deduplication, and triage of user-submitted suspicious emails, cross-references against in-flight campaigns and triggers retroactive remediation across all recipients.

Detects compromised or spoofed third-party supplier accounts by analyzing communication pattern deviations, domain aging, and content signals, targeting invoice fraud and payment redirection attacks.

Detects AI-generated impersonation in email-borne fraud - synthetic text, deepfake audio and video lures, and cloned sender styles - beyond signature and rule-based content analysis.

Extends the same phishing, malware, and social-engineering detection applied to email to messages and files in collaboration and productivity tools such as Teams, Slack, SharePoint, OneDrive, Google Drive, and Salesforce, through the tools' APIs, so threats that arrive outside the inbox are caught by the same policies and remediation.

Checks outbound messages before they are sent for recipients who do not match the sender's normal communication pattern, wrong or lookalike addresses, and attachments that do not belong with the message, and warns or blocks the sender, so accidental data exposure by misaddressed email is stopped at the point of sending.

Presents one quarantine and release workflow across the vendor's own detections and the cloud email provider's native filtering, so administrators and end users do not manage two split quarantines when an API-based product is layered on Microsoft Defender for Office 365 or Google Workspace.

Detects and suppresses subscription-bombing and mail-flood attacks, in which an inbox is deliberately buried under thousands of newsletter confirmations or spam to hide a fraudulent message or account-takeover alert, and restores normal delivery for the targeted user.

Compliance

certifications
FedRAMP ModerateISO 27001ISO 27701ISO/IEC 42001SOC 2 Type II

Integrations

compatible tools
Azure ADExchange Online ProtectionGmail APIGoogle WorkspaceJiraMicrosoft 365Microsoft Defender for Office 365Microsoft Graph APIMicrosoft SentinelMicrosoft TeamsOktaPagerDutyPalo Alto Cortex XSOARSalesforceServiceNowSlackSplunkZoom

Implementation & support

Deployment model
SaaS
Support channels
24/7 SupportCustomer Success Manager (CSM)Email SupportPhone SupportTechnical Account Manager (TAM)

Info last updated on September 7, 2026

Buyers

Start a shortlist with Abnormal Email Security

Compare options, add your notes, and run informed evaluations.

Vendors

Is this your product?

Claim your profile to connect with the teams looking for your solutions.

Security Stack Logo

The curated research platform for enterprise cybersecurity solutions.

Resources

All product and company names, logos, and brands are property of their respective owners and are used on this website for identification purposes only. Security Stack does not endorse any vendor, product, or service listed, and makes no warranties, express or implied, as to the accuracy or completeness of this content, including any warranties of merchantability or fitness for a particular purpose.

© 2026 Security Stack. All rights reserved.