# Abnormal AI Security Mailbox alternatives and competitors (2026)

The closest Abnormal AI Security Mailbox alternatives are [Fortra Email Security & Anti-Phishing](https://cybersectools.com/tools/fortra-email-security-and-anti-phishing), [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365) and [INKY Behavioral Email Security Platform](https://cybersectools.com/tools/inky-behavioral-email-security-platform). Picking an Abnormal AI Security Mailbox alternative comes down to fit: Email Security Platforms coverage, your environment, your integrations and your budget. So each option below shows what it covers, how it deploys, its pricing model and the company behind it.

Closest 48 alternatives shown. Closest matches: Fortra Email Security & Anti-Phishing, Microsoft Defender for Office 365, INKY Behavioral Email Security Platform.

## The product

[Abnormal AI Security Mailbox](https://cybersectools.com/tools/abnormal-security-ai-security-mailbox) by Abnormal Security

AI-powered email security operations platform for automated threat triage

Category: [Email & Messaging Security](https://cybersectools.com/categories/email-security) · Pricing model: Commercial

Need the answer fast? [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms) picks Proofpoint Core Email Protection, Microsoft Defender for Office 365, Mimecast Advanced Email Security and 4 more.

## Abnormal AI Security Mailbox alternatives and competitors

Abnormal AI Security Mailbox is a commercial [Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) solution made by Abnormal Security. The closest matches by shared tags and NIST CSF 2.0 coverage are [Fortra Email Security & Anti-Phishing](https://cybersectools.com/tools/fortra-email-security-and-anti-phishing), [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365), [INKY Behavioral Email Security Platform](https://cybersectools.com/tools/inky-behavioral-email-security-platform), [Sophos Email](https://cybersectools.com/tools/sophos-email), and [GreatHorn Email Security](https://cybersectools.com/tools/greathorn-email-security). All 48 alternatives on this page are ranked the same way.

## The closest Abnormal AI Security Mailbox alternatives

These 8 solutions overlap most with Abnormal AI Security Mailbox. Each one says what the product does and, when the overlap is big enough, which capabilities it shares.

### 1. [Fortra Email Security & Anti-Phishing](https://cybersectools.com/tools/fortra-email-security-and-anti-phishing) (Featured)

Email security platform protecting against phishing, BEC, and data loss

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: DMARC email authentication and enforcement, Business email compromise detection, Spear phishing protection, Account takeover detection, Data loss prevention for sensitive data

[Fortra Email Security & Anti-Phishing alternatives](https://cybersectools.com/alternatives/fortra-email-security-and-anti-phishing) · [Abnormal AI Security Mailbox vs Fortra Email Security & Anti-Phishing](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-fortra-email-security-and-anti-phishing)

### 2. [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365)

Email and collaboration security for Microsoft 365 environments

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [Microsoft Defender for Office 365 page](https://cybersectools.com/tools/microsoft-defender-for-office-365#features).

[Microsoft Defender for Office 365 alternatives](https://cybersectools.com/alternatives/microsoft-defender-for-office-365) · [Abnormal AI Security Mailbox vs Microsoft Defender for Office 365](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-microsoft-defender-for-office-365)

### 3. [INKY Behavioral Email Security Platform](https://cybersectools.com/tools/inky-behavioral-email-security-platform)

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

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [INKY Behavioral Email Security Platform page](https://cybersectools.com/tools/inky-behavioral-email-security-platform#features).

[INKY Behavioral Email Security Platform alternatives](https://cybersectools.com/alternatives/inky-behavioral-email-security-platform) · [Abnormal AI Security Mailbox vs INKY Behavioral Email Security Platform](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-inky-behavioral-email-security-platform)

### 4. [Sophos Email](https://cybersectools.com/tools/sophos-email)

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

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [Sophos Email page](https://cybersectools.com/tools/sophos-email#features).

[Sophos Email alternatives](https://cybersectools.com/alternatives/sophos-email) · [Abnormal AI Security Mailbox vs Sophos Email](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-sophos-email)

### 5. [GreatHorn Email Security](https://cybersectools.com/tools/greathorn-email-security)

Cloud-native email security platform for phishing detection and response

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [GreatHorn Email Security page](https://cybersectools.com/tools/greathorn-email-security#features).

[GreatHorn Email Security alternatives](https://cybersectools.com/alternatives/greathorn-email-security) · [Abnormal AI Security Mailbox vs GreatHorn Email Security](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-greathorn-email-security)

### 6. [Trustifi AI Powered Email Security](https://cybersectools.com/tools/trustifi-ai-powered-email-security)

AI-powered email security platform for threat detection and compliance

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [Trustifi AI Powered Email Security page](https://cybersectools.com/tools/trustifi-ai-powered-email-security#features).

[Trustifi AI Powered Email Security alternatives](https://cybersectools.com/alternatives/trustifi-ai-powered-email-security) · [Abnormal AI Security Mailbox vs Trustifi AI Powered Email Security](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-trustifi-ai-powered-email-security)

### 7. [Proofpoint Core Email Protection](https://cybersectools.com/tools/proofpoint-threat-protection)

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

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [Proofpoint Core Email Protection page](https://cybersectools.com/tools/proofpoint-threat-protection#features).

[Proofpoint Core Email Protection alternatives](https://cybersectools.com/alternatives/proofpoint-threat-protection) · [Abnormal AI Security Mailbox vs Proofpoint Core Email Protection](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-proofpoint-threat-protection)

### 8. [Broadcom Symantec Email Security](https://cybersectools.com/tools/broadcom-symantec-email-security)

Enterprise email security platform for cloud and on-premise deployments

[Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) · Commercial

Key features: 10 listed. See them on the [Broadcom Symantec Email Security page](https://cybersectools.com/tools/broadcom-symantec-email-security#features).

[Broadcom Symantec Email Security alternatives](https://cybersectools.com/alternatives/broadcom-symantec-email-security) · [Abnormal AI Security Mailbox vs Broadcom Symantec Email Security](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-broadcom-symantec-email-security)

## The closest 48 products like Abnormal AI Security Mailbox

The 8 above, plus:

- [KnowBe4 Cloud Email Security](https://cybersectools.com/tools/knowbe4-cloud-email-security): AI-driven email security platform for Microsoft 365 inbound/outbound threats (Commercial)
- [ConnectWise Email Security](https://cybersectools.com/tools/connectwise-email-security): Email security platform with AI threat detection, BEC protection, and DLP (Commercial)
- [Kaseya 365 Advanced Threat Protection](https://cybersectools.com/tools/kaseya-365-advanced-threat-protection): ATP solution for SaaS & email with AI-driven detection & auto-response (Commercial)
- [ID Agent Graphus](https://cybersectools.com/tools/id-agent-graphus): AI-powered anti-phishing platform for Microsoft 365 & Google Workspace. (Commercial)
- [Infonaligy Proofpoint Email Security](https://cybersectools.com/tools/infonaligy-proofpoint-email-security): Managed Proofpoint email security service for phishing & BEC protection. (Commercial)
- [Upfort](https://cybersectools.com/tools/upfort): Unified AI-powered cybersecurity & cyber insurance platform for SMBs. (Commercial)
- [Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/tools/fortinet-fortimail-email-security): AI-powered email security platform protecting against phishing, BEC, and ATO (Commercial)
- [Cloudflare Cloud Email Security](https://cybersectools.com/tools/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. (Commercial)
- [Cellopoint Cloud Email Security Solution](https://cybersectools.com/tools/cellopoint-cloud-email-security-solution): Cloud-based email security platform protecting against phishing, ransomware, BEC (Commercial)
- [SorbSecurity Cloud Email Security](https://cybersectools.com/tools/sorbsecurity-cloud-email-security): Cloud-based email security platform protecting against phishing & ransomware (Commercial)
- [Mimecast Advanced Email Security](https://cybersectools.com/tools/mimecast-advanced-email-security): Email security platform protecting M365 & Google Workspace from threats (Commercial)
- [Zivver Secure Business Email](https://cybersectools.com/tools/zivver-secure-business-email): All-in-one email security platform for threat protection and compliance (Commercial)
- [MX Layer Email Security](https://cybersectools.com/tools/mx-layer-email-security): Cloud-based email security platform with AI-powered threat detection (Commercial)
- [xorlab Email Security](https://cybersectools.com/tools/xorlab-email-security): AI-driven email security platform for detecting advanced email threats (Commercial)
- [Trend Micro Trend Vision One™](https://cybersectools.com/tools/trend-micro-trend-vision-onetm): AI-powered email and collaboration security platform for threat detection (Commercial)
- [AnubisNetworks Email Security](https://cybersectools.com/tools/anubisnetworks-email-security): Email security platform protecting against fraud, malware, and spam threats (Commercial)
- [ESET Cloud Office Security](https://cybersectools.com/tools/eset-cloud-office-security): Cloud email security for Microsoft 365 and Google Workspace applications (Commercial)
- [Material Security Email Security](https://cybersectools.com/tools/material-security-email-security): Cloud workspace security platform for email, files, and account protection (Commercial)
- [AI-Powered Email Security & DMARC Protection](https://cybersectools.com/tools/emailinspect): AI-powered DMARC monitoring and email authentication security platform (Commercial)
- [Bitdefender GravityZone Extended Email Security](https://cybersectools.com/tools/bitdefender-gravityzone-extended-email-security): Cloud-native email security platform with SEG and API-based protection (Commercial)
- [Darktrace Email Security](https://cybersectools.com/tools/darktrace-email-security): AI-powered email security platform detecting threats across email and messaging (Commercial)
- [OPSWAT MetaDefender Email Security](https://cybersectools.com/tools/opswat-metadefender-email-security): Email security platform protecting against phishing, malware, and exploits (Commercial)
- [VIPRE Integrated Email Security (IES)](https://cybersectools.com/tools/vipre-integrated-email-security-ies): Email security platform for Microsoft 365 with AI-based threat detection (Commercial)
- [Trustifi Inbound Shield](https://cybersectools.com/tools/trustifi-inbound-shield): AI-powered inbound email security platform for phishing & malware detection (Commercial)
- [Mesh 365](https://cybersectools.com/tools/mesh-365): API-based email security platform for Microsoft 365 environments (Commercial)
- [Cisco Secure Email Threat Defense](https://cybersectools.com/tools/cisco-secure-email-threat-defense): Email threat protection for Microsoft 365 with advanced detection capabilities (Commercial)
- [Sublime Email Security](https://cybersectools.com/tools/sublime-email-security): AI-powered email security platform with agentic automation and detection (Commercial)
- [Cybersentriq MX Email Threat Protection](https://cybersectools.com/tools/cybersentriq-mx-email-threat-protection): MX-based email security platform using AI to block spam, phishing & malware (Commercial)
- [ThreatDown Email Security](https://cybersectools.com/tools/threatdown-email-security): AI-powered email security platform for phishing and BEC protection (Commercial)
- [Hoplite Artemis Web and Mail](https://cybersectools.com/tools/hoplite-artemis-web-and-mail): Email and web threat detection platform with AI-based behavioral analysis (Commercial)
- [IRONSCALES Adaptive AI Email Security](https://cybersectools.com/tools/ironscales-adaptive-ai-email-security): AI-powered email security platform with behavioral detection and automation (Commercial)
- [SpamExperts Email Security](https://cybersectools.com/tools/spamexperts-email-security): Email security platform filtering spam, phishing, and malware threats (Commercial)
- [SpamExperts Incoming Email Filtering](https://cybersectools.com/tools/spamexperts-incoming-email-filtering): Email filtering service protecting against spam, viruses, and phishing. (Commercial)
- [Vircom Email Security](https://cybersectools.com/tools/vircom-email-security): Email security platform enhanced with multi-tenant mgmt & automation tools (Commercial)
- [Group-IB Business Email Protection](https://cybersectools.com/tools/group-ib-business-email-protection): Email security platform protecting against phishing, malware, and BEC attacks (Commercial)
- [AegisAI Agentic Email Security](https://cybersectools.com/tools/aegisai-agentic-email-security): AI-powered email security platform that detects phishing, BEC, and malware (Commercial)
- [Mailinblack U-Cyber 360°](https://cybersectools.com/tools/mailinblack-u-cyber-360): Comprehensive email security & human risk mgmt platform with AI-powered protection (Commercial)
- [Strongest Layer](https://cybersectools.com/tools/strongest-layer): AI-native email security platform detecting phishing and BEC attacks (Commercial)
- [GLIMPS Email Security for M365](https://cybersectools.com/tools/glimps-email-security-for-m365): AI-based email security for M365 with phishing, BEC & malware detection. (Commercial)
- [MailGuard Email Security](https://cybersectools.com/tools/mailguard-email-security): Cloud-based email filtering blocking phishing, malware, spam & BEC attacks. (Commercial)

## Alternatives to each of these

[Fortra Email Security & Anti-Phishing alternatives](https://cybersectools.com/alternatives/fortra-email-security-and-anti-phishing) · [Microsoft Defender for Office 365 alternatives](https://cybersectools.com/alternatives/microsoft-defender-for-office-365) · [INKY Behavioral Email Security Platform alternatives](https://cybersectools.com/alternatives/inky-behavioral-email-security-platform) · [Sophos Email alternatives](https://cybersectools.com/alternatives/sophos-email) · [GreatHorn Email Security alternatives](https://cybersectools.com/alternatives/greathorn-email-security) · [Trustifi AI Powered Email Security alternatives](https://cybersectools.com/alternatives/trustifi-ai-powered-email-security) · [Proofpoint Core Email Protection alternatives](https://cybersectools.com/alternatives/proofpoint-threat-protection) · [Broadcom Symantec Email Security alternatives](https://cybersectools.com/alternatives/broadcom-symantec-email-security) · [KnowBe4 Cloud Email Security alternatives](https://cybersectools.com/alternatives/knowbe4-cloud-email-security) · [ConnectWise Email Security alternatives](https://cybersectools.com/alternatives/connectwise-email-security) · [Kaseya 365 Advanced Threat Protection alternatives](https://cybersectools.com/alternatives/kaseya-365-advanced-threat-protection) · [ID Agent Graphus alternatives](https://cybersectools.com/alternatives/id-agent-graphus)

## Other Abnormal Security products

[Abnormal AI Phishing Coach alternatives](https://cybersectools.com/alternatives/abnormal-ai-phishing-coach) · [Abnormal Core Account Takeover Protection alternatives](https://cybersectools.com/alternatives/abnormal-core-account-takeover-protection) · [Abnormal Inbound Email Security alternatives](https://cybersectools.com/alternatives/abnormal-security-cloud-email-security) · [Abnormal Messaging Security alternatives](https://cybersectools.com/alternatives/abnormal-messaging-security) · [Abnormal SaaS Account Takeover Protection alternatives](https://cybersectools.com/alternatives/abnormal-saas-account-takeover-protection) · [Abnormal Security Security Posture Management alternatives](https://cybersectools.com/alternatives/abnormal-security-security-posture-management)

## Compare Abnormal AI Security Mailbox with

- [Abnormal AI Security Mailbox vs Fortra Email Security & Anti-Phishing](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-fortra-email-security-and-anti-phishing)
- [Abnormal AI Security Mailbox vs Microsoft Defender for Office 365](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-microsoft-defender-for-office-365)
- [Abnormal AI Security Mailbox vs INKY Behavioral Email Security Platform](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-inky-behavioral-email-security-platform)
- [Abnormal AI Security Mailbox vs Sophos Email](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-sophos-email)
- [Abnormal AI Security Mailbox vs GreatHorn Email Security](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-greathorn-email-security)
- [Abnormal AI Security Mailbox vs Trustifi AI Powered Email Security](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-trustifi-ai-powered-email-security)
- [Abnormal AI Security Mailbox vs Proofpoint Core Email Protection](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-proofpoint-threat-protection)
- [Abnormal AI Security Mailbox vs Broadcom Symantec Email Security](https://cybersectools.com/compare/abnormal-security-ai-security-mailbox-vs-broadcom-symantec-email-security)

## Abnormal AI Security Mailbox Alternatives FAQ

### What are the closest alternatives to Abnormal AI Security Mailbox?

The closest matches to Abnormal AI Security Mailbox by shared tags and NIST CSF 2.0 coverage are Fortra Email Security & Anti-Phishing, Microsoft Defender for Office 365, INKY Behavioral Email Security Platform, Sophos Email, and GreatHorn Email Security. All of them are Email Security Platforms products.

### How many alternatives to Abnormal AI Security Mailbox are available?

This page shows 48 alternatives to Abnormal AI Security Mailbox, 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.

### Is Abnormal AI Security Mailbox free or commercial?

Abnormal AI Security Mailbox 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.

### What type of solution is Abnormal AI Security Mailbox?

Abnormal AI Security Mailbox is a Email Security Platforms product in the Email & Messaging Security category. You can compare it with the 48 other Email Security Platforms products on this page.

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Source: https://cybersectools.com/alternatives/abnormal-security-ai-security-mailbox

For AI agents: every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md, and any product or compare page has a Markdown copy too (add .md to its URL).

More on Abnormal AI Security Mailbox and its alternatives: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=alternatives-md