# Cisco Secure Email Threat Defense alternatives and competitors (2026)

The closest Cisco Secure Email Threat Defense alternatives are [Fortra Email Security & Anti-Phishing](https://cybersectools.com/tools/fortra-email-security-and-anti-phishing), [Ocean Agentic Email Security Platform](https://cybersectools.com/tools/ocean-agentic-email-security-platform) and [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365). Picking a Cisco Secure Email Threat Defense 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.

43 alternatives. Closest matches: Fortra Email Security & Anti-Phishing, Ocean Agentic Email Security Platform, Microsoft Defender for Office 365.

## The product

[Cisco Secure Email Threat Defense](https://cybersectools.com/tools/cisco-secure-email-threat-defense) by Cisco

Email threat protection for Microsoft 365 with advanced detection capabilities

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.

## Cisco Secure Email Threat Defense alternatives and competitors

Cisco Secure Email Threat Defense is a commercial [Email Security Platforms](https://cybersectools.com/categories/email-security-platforms) solution made by Cisco. 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), [Ocean Agentic Email Security Platform](https://cybersectools.com/tools/ocean-agentic-email-security-platform), [Microsoft Defender for Office 365](https://cybersectools.com/tools/microsoft-defender-for-office-365), [NoSpamProxy Protection](https://cybersectools.com/tools/nospamproxy-protection), and [Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/tools/fortinet-fortimail-email-security). All 43 alternatives on this page are ranked the same way.

## The closest Cisco Secure Email Threat Defense alternatives

These 8 solutions overlap most with Cisco Secure Email Threat Defense. 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) · [Cisco Secure Email Threat Defense vs Fortra Email Security & Anti-Phishing](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-fortra-email-security-and-anti-phishing)

### 2. [Ocean Agentic Email Security Platform](https://cybersectools.com/tools/ocean-agentic-email-security-platform)

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

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

Key features: 10 listed. See them on the [Ocean Agentic Email Security Platform page](https://cybersectools.com/tools/ocean-agentic-email-security-platform#features).

[Ocean Agentic Email Security Platform alternatives](https://cybersectools.com/alternatives/ocean-agentic-email-security-platform) · [Cisco Secure Email Threat Defense vs Ocean Agentic Email Security Platform](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-ocean-agentic-email-security-platform)

### 3. [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) · [Cisco Secure Email Threat Defense vs Microsoft Defender for Office 365](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-microsoft-defender-for-office-365)

### 4. [NoSpamProxy Protection](https://cybersectools.com/tools/nospamproxy-protection)

Email gateway that blocks spam, phishing and malware before inbox delivery, made

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

Key features: 10 listed. See them on the [NoSpamProxy Protection page](https://cybersectools.com/tools/nospamproxy-protection#features).

[NoSpamProxy Protection alternatives](https://cybersectools.com/alternatives/nospamproxy-protection) · [Cisco Secure Email Threat Defense vs NoSpamProxy Protection](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-nospamproxy-protection)

### 5. [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

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

Key features: 10 listed. See them on the [Fortinet FortiMail Email and Workspace Security page](https://cybersectools.com/tools/fortinet-fortimail-email-security#features).

[Fortinet FortiMail Email and Workspace Security alternatives](https://cybersectools.com/alternatives/fortinet-fortimail-email-security) · [Cisco Secure Email Threat Defense vs Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-fortinet-fortimail-email-security)

### 6. [Cellopoint Cloud Email Security Solution](https://cybersectools.com/tools/cellopoint-cloud-email-security-solution)

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

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

Key features: 8 listed. See them on the [Cellopoint Cloud Email Security Solution page](https://cybersectools.com/tools/cellopoint-cloud-email-security-solution#features).

[Cellopoint Cloud Email Security Solution alternatives](https://cybersectools.com/alternatives/cellopoint-cloud-email-security-solution) · [Cisco Secure Email Threat Defense vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-cisco-secure-email-threat-defense)

### 7. [Mimecast Advanced Email Security](https://cybersectools.com/tools/mimecast-advanced-email-security)

Email security platform protecting M365 & Google Workspace from threats

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

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

[Mimecast Advanced Email Security alternatives](https://cybersectools.com/alternatives/mimecast-advanced-email-security) · [Cisco Secure Email Threat Defense vs Mimecast Advanced Email Security](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-mimecast-advanced-email-security)

### 8. [ESET Cloud Office Security](https://cybersectools.com/tools/eset-cloud-office-security)

Cloud email security for Microsoft 365 and Google Workspace applications

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

Key features: 10 listed. See them on the [ESET Cloud Office Security page](https://cybersectools.com/tools/eset-cloud-office-security#features).

[ESET Cloud Office Security alternatives](https://cybersectools.com/alternatives/eset-cloud-office-security) · [Cisco Secure Email Threat Defense vs ESET Cloud Office Security](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-eset-cloud-office-security)

## All 43 products like Cisco Secure Email Threat Defense

The 8 above, plus:

- [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)
- [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)
- [Mesh 365](https://cybersectools.com/tools/mesh-365): API-based email security platform for Microsoft 365 environments (Commercial)
- [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)
- [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)
- [ID Agent Graphus](https://cybersectools.com/tools/id-agent-graphus): AI-powered anti-phishing platform for Microsoft 365 & Google Workspace. (Commercial)
- [Ravenloop Ravenpost](https://cybersectools.com/tools/ravenloop-ravenpost): Email and messaging security tool that detects phishing, malware, and targeted threats (Commercial)
- [TrustLayer Mail](https://cybersectools.com/tools/trustlayer-mail): Email security platform with inline threat protection and compliant archiving (Commercial)
- [Broadcom Symantec Email Security](https://cybersectools.com/tools/broadcom-symantec-email-security): Enterprise email security platform for cloud and on-premise deployments (Commercial)
- [Darktrace Email Security](https://cybersectools.com/tools/darktrace-email-security): AI-powered email security platform detecting threats across email and messaging (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)
- [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)
- [Vircom Email Security](https://cybersectools.com/tools/vircom-email-security): Email security platform enhanced with multi-tenant mgmt & automation tools (Commercial)
- [SpamTitan for Office 365](https://cybersectools.com/tools/spamtitan-for-office-365): Email security layer for M365 with anti-phishing, sandboxing, and DLP. (Commercial)
- [Upfort](https://cybersectools.com/tools/upfort): Unified AI-powered cybersecurity & cyber insurance platform for SMBs. (Commercial)
- [Hornetsecurity](https://cybersectools.com/tools/hornetsecurity): Cloud security platform for M365 covering email, backup, and awareness. (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)
- [INKY Behavioral Email Security Platform](https://cybersectools.com/tools/inky-behavioral-email-security-platform): Behavioral email security platform protecting inbound, outbound, and internal mail (Commercial)
- [Sophos Email](https://cybersectools.com/tools/sophos-email): Email security platform with phishing/BEC protection and MDR/XDR integration (Commercial)
- [SorbSecurity Cloud Email Security](https://cybersectools.com/tools/sorbsecurity-cloud-email-security): Cloud-based email security platform protecting against phishing & ransomware (Commercial)
- [GreatHorn Email Security](https://cybersectools.com/tools/greathorn-email-security): Cloud-native email security platform for phishing detection and response (Commercial)
- [Trustifi AI Powered Email Security](https://cybersectools.com/tools/trustifi-ai-powered-email-security): AI-powered email security platform for threat detection 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)
- [Proofpoint Core Email Protection](https://cybersectools.com/tools/proofpoint-threat-protection): Email security platform with AI-based threat detection and DLP capabilities (Commercial)
- [AnubisNetworks Email Security](https://cybersectools.com/tools/anubisnetworks-email-security): Email security platform protecting against fraud, malware, and spam threats (Commercial)
- [Abnormal Inbound Email Security](https://cybersectools.com/tools/abnormal-security-cloud-email-security): AI-powered email security platform detecting advanced threats via behavioral analysis (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)
- [TitanHQ Cybersecurity Bundles](https://cybersectools.com/tools/titanhq-cybersecurity-bundles): Bundled cybersecurity solutions for MSPs and end users with email protection (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)

## Alternatives to each of these

[Fortra Email Security & Anti-Phishing alternatives](https://cybersectools.com/alternatives/fortra-email-security-and-anti-phishing) · [Ocean Agentic Email Security Platform alternatives](https://cybersectools.com/alternatives/ocean-agentic-email-security-platform) · [Microsoft Defender for Office 365 alternatives](https://cybersectools.com/alternatives/microsoft-defender-for-office-365) · [NoSpamProxy Protection alternatives](https://cybersectools.com/alternatives/nospamproxy-protection) · [Fortinet FortiMail Email and Workspace Security alternatives](https://cybersectools.com/alternatives/fortinet-fortimail-email-security) · [Cellopoint Cloud Email Security Solution alternatives](https://cybersectools.com/alternatives/cellopoint-cloud-email-security-solution) · [Mimecast Advanced Email Security alternatives](https://cybersectools.com/alternatives/mimecast-advanced-email-security) · [ESET Cloud Office Security alternatives](https://cybersectools.com/alternatives/eset-cloud-office-security) · [Bitdefender GravityZone Extended Email Security alternatives](https://cybersectools.com/alternatives/bitdefender-gravityzone-extended-email-security) · [OPSWAT MetaDefender Email Security alternatives](https://cybersectools.com/alternatives/opswat-metadefender-email-security) · [VIPRE Integrated Email Security (IES) alternatives](https://cybersectools.com/alternatives/vipre-integrated-email-security-ies) · [Mesh 365 alternatives](https://cybersectools.com/alternatives/mesh-365)

## Other Cisco products

[Cisco Identity Intelligence alternatives](https://cybersectools.com/alternatives/cisco-identity-intelligence) · [Cisco Secure Firewall alternatives](https://cybersectools.com/alternatives/cisco-secure-firewall) · [Cisco Web Application and API Protection (WAAP) alternatives](https://cybersectools.com/alternatives/cisco-web-application-and-api-protection-waap) · [Cisco XDR alternatives](https://cybersectools.com/alternatives/cisco-xdr) · [Skill Scanner alternatives](https://cybersectools.com/alternatives/skill-scanner) · [Snort Open Source alternatives](https://cybersectools.com/alternatives/snort-open-source)

## Compare Cisco Secure Email Threat Defense with

- [Cisco Secure Email Threat Defense vs Fortra Email Security & Anti-Phishing](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-fortra-email-security-and-anti-phishing)
- [Cisco Secure Email Threat Defense vs Ocean Agentic Email Security Platform](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-ocean-agentic-email-security-platform)
- [Cisco Secure Email Threat Defense vs Microsoft Defender for Office 365](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-microsoft-defender-for-office-365)
- [Cisco Secure Email Threat Defense vs NoSpamProxy Protection](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-nospamproxy-protection)
- [Cisco Secure Email Threat Defense vs Fortinet FortiMail Email and Workspace Security](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-fortinet-fortimail-email-security)
- [Cisco Secure Email Threat Defense vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/cellopoint-cloud-email-security-solution-vs-cisco-secure-email-threat-defense)
- [Cisco Secure Email Threat Defense vs Mimecast Advanced Email Security](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-mimecast-advanced-email-security)
- [Cisco Secure Email Threat Defense vs ESET Cloud Office Security](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-eset-cloud-office-security)

## Cisco Secure Email Threat Defense Alternatives FAQ

### What are the closest alternatives to Cisco Secure Email Threat Defense?

The closest matches to Cisco Secure Email Threat Defense by shared tags and NIST CSF 2.0 coverage are Fortra Email Security & Anti-Phishing, Ocean Agentic Email Security Platform, Microsoft Defender for Office 365, NoSpamProxy Protection, and Fortinet FortiMail Email and Workspace Security. All of them are Email Security Platforms products.

### How many alternatives to Cisco Secure Email Threat Defense are available?

This page shows 43 alternatives to Cisco Secure Email Threat Defense, 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 Cisco Secure Email Threat Defense free or commercial?

Cisco Secure Email Threat Defense 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 Cisco Secure Email Threat Defense?

Cisco Secure Email Threat Defense is a Email Security Platforms product in the Email & Messaging Security category. You can compare it with the 43 other Email Security Platforms products on this page.

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Source: https://cybersectools.com/alternatives/cisco-secure-email-threat-defense

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