# Cisco Secure Email Threat Defense vs Sublime Platform: 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). [Sublime Platform](https://cybersectools.com/tools/sublime-platform) is a free [detection engineering](https://cybersectools.com/categories/detection-engineering) solution. 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 | Sublime Platform | |---|---|---| | Pricing model | Commercial | Free | | Category | Email Security Platforms | Detection Engineering | | Verified | No | No | | Deployment type | Cloud | Hybrid | | Company size fit | SMB, Mid-Market, Enterprise | Startup, SMB, Mid-Market, Enterprise | | GitHub stars | – | 250 | | Last commit | – | Mar 2026 | | Company | Cisco | – | | Headquarters | – | – | ### Use cases and capabilities | | Cisco Secure Email Threat Defense | Sublime Platform | |---|---|---| | Microsoft 365 | Yes | – | | Threat Analysis | Yes | – | | Open Source | – | Yes | ### Core features **Cisco Secure Email Threat Defense** 9 features listed. Sign in on the page to see them. **Sublime Platform** No features listed. ### Integrations **Cisco Secure Email Threat Defense** 3 integrations listed. Sign in on the page to see them. **Sublime Platform** No integrations listed. ## Which one fits you Based on what each listing shows: deployment, company size, price and open source. - [Cisco Secure Email Threat Defense](https://cybersectools.com/tools/cisco-secure-email-threat-defense) fits if you want a cloud product. - [Sublime Platform](https://cybersectools.com/tools/sublime-platform) fits if you need both cloud and on-premises options, you are a startup, you need a free product and you want an open-source product. ## Cisco Secure Email Threat Defense vs Sublime Platform FAQ Common questions when comparing Cisco Secure Email Threat Defense vs Sublime Platform for email security platforms. ### What is the difference between Cisco Secure Email Threat Defense and Sublime Platform? **Cisco Secure Email Threat Defense**: Email threat protection for Microsoft 365 with advanced detection capabilities. Built by Cisco. **Sublime Platform**: A free and open platform for detecting and preventing email attacks like BEC, malware, and credential phishing, utilizing Message Query Language (MQL) for behavior description. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Cisco Secure Email Threat Defense and Sublime Platform? **Cisco Secure Email Threat Defense** is made by Cisco. **Sublime Platform** is open-source with 250 GitHub stars. 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 Sublime Platform? In part. Cisco Secure Email Threat Defense and Sublime Platform are not in the same category on CybersecTools. Key differences: Cisco Secure Email Threat Defense is Commercial while Sublime Platform is Free, Sublime Platform is open-source. 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 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) - [Sublime Platform vs Ocean Agentic Email Security Platform](https://cybersectools.com/compare/ocean-agentic-email-security-platform-vs-sublime-platform) - [Sublime Platform vs Microsoft Defender for Office 365](https://cybersectools.com/compare/microsoft-defender-for-office-365-vs-sublime-platform) - [Sublime Platform vs NoSpamProxy Protection](https://cybersectools.com/compare/nospamproxy-protection-vs-sublime-platform) ## Alternatives to each - [See all Cisco Secure Email Threat Defense alternatives](https://cybersectools.com/alternatives/cisco-secure-email-threat-defense) - [See all Sublime Platform alternatives](https://cybersectools.com/alternatives/sublime-platform) --- Source: https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-sublime-platform 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 Sublime Platform: 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