# Cisco Secure Email Threat Defense vs SEK Managed Detection & Response: side-by-side comparison (2026) [Cisco Secure Email Threat Defense](https://cybersectools.com/tools/cisco-secure-email-threat-defense) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Cisco](https://cybersectools.com/companies/cisco). [SEK Managed Detection & Response](https://cybersectools.com/tools/sek-managed-detection-and-response) is a commercial [managed detection and response](https://cybersectools.com/categories/mdr) solution by [SEK](https://cybersectools.com/companies/sek). Features, integrations, deployment and the company behind each one, side by side. ## Our take What our shortlists say about the one we picked. ### [Cisco Secure Email Threat Defense](https://cybersectools.com/tools/cisco-secure-email-threat-defense) Best for: Cisco shops wanting Talos-backed filtering It is on the list as a Microsoft 365 product that can grow with you: you start in API mode and add the inline gateway later, from the same console. That suits a team that already runs Cisco security. Check fit first if you run Google Workspace or your own mail servers, because the product is built for Microsoft 365. From [Best Email Security Solutions for Business](https://cybersectools.com/shortlists/best-email-security-platforms), Fall 2026. Reviewed by [Nika (Nikoloz) Kokhreidze](https://cybersectools.com/about). 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. ## Side-by-side comparison | | Cisco Secure Email Threat Defense | SEK Managed Detection & Response | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Security Platforms | Managed Detection and Response | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Cisco | SEK | | Headquarters | – | – | ### Use cases and capabilities | | Cisco Secure Email Threat Defense | SEK Managed Detection & Response | |---|---|---| | Microsoft 365 | Yes | – | | Threat Analysis | Yes | Yes | | AI SOC | – | Yes | | Alerting | – | Yes | | Anomaly Detection | – | Yes | | IOC | – | Yes | | MITRE ATT&CK | – | Yes | | Critical Infrastructure | – | Yes | ### Core features **Cisco Secure Email Threat Defense** 9 features listed. Sign in on the page to see them. **SEK Managed Detection & Response** 10 features listed. Sign in on the page to see them. ### Integrations **Cisco Secure Email Threat Defense** 3 integrations listed. Sign in on the page to see them. **SEK Managed Detection & Response** 2 integrations listed. Sign in on the page to see them. ## Cisco Secure Email Threat Defense vs SEK Managed Detection & Response FAQ Common questions when comparing Cisco Secure Email Threat Defense vs SEK Managed Detection & Response for email security platforms. ### What is the difference between Cisco Secure Email Threat Defense and SEK Managed Detection & Response? **Cisco Secure Email Threat Defense**: Email threat protection for Microsoft 365 with advanced detection capabilities. Built by Cisco. **SEK Managed Detection & Response**: AI-driven managed detection and response service with SIEM, EDR/XDR, hunting, IR, and DFIR. Built by SEK. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Cisco Secure Email Threat Defense and SEK Managed Detection & Response? **Cisco Secure Email Threat Defense** is made by Cisco. **SEK Managed Detection & Response** is made by SEK. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Cisco Secure Email Threat Defense a good alternative to SEK Managed Detection & Response? In part. Cisco Secure Email Threat Defense and SEK Managed Detection & Response are not in the same category on CybersecTools. Both cover Threat Analysis. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [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 NoSpamProxy Protection](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-nospamproxy-protection) - [Cisco Secure Email Threat Defense vs Ravenloop Ravenpost](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-ravenloop-ravenpost) - [SEK Managed Detection & Response vs Ocean Agentic Email Security Platform](https://cybersectools.com/compare/ocean-agentic-email-security-platform-vs-sek-managed-detection-and-response) - [SEK Managed Detection & Response vs NoSpamProxy Protection](https://cybersectools.com/compare/nospamproxy-protection-vs-sek-managed-detection-and-response) - [SEK Managed Detection & Response vs Ravenloop Ravenpost](https://cybersectools.com/compare/ravenloop-ravenpost-vs-sek-managed-detection-and-response) ## Alternatives to each - [See all Cisco Secure Email Threat Defense alternatives](https://cybersectools.com/alternatives/cisco-secure-email-threat-defense) - [See all SEK Managed Detection & Response alternatives](https://cybersectools.com/alternatives/sek-managed-detection-and-response) --- Source: https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-sek-managed-detection-and-response For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/cisco-secure-email-threat-defense.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Cisco Secure Email Threat Defense and SEK Managed Detection & Response: 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=compare-md