# Bitdefender GravityZone Extended Email Security vs Cisco Secure Email Threat Defense: side-by-side comparison (2026) [Bitdefender GravityZone Extended Email Security](https://cybersectools.com/tools/bitdefender-gravityzone-extended-email-security) is a commercial [email security platforms](https://cybersectools.com/categories/email-security-platforms) solution by [Bitdefender](https://cybersectools.com/companies/bitdefender). [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). 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 | | Bitdefender GravityZone Extended Email Security | Cisco Secure Email Threat Defense | |---|---|---| | Pricing model | Commercial | Commercial | | Category | Email Security Platforms | Email Security Platforms | | Verified | No | No | | Deployment type | Cloud | Cloud | | Company size fit | SMB, Mid-Market, Enterprise | SMB, Mid-Market, Enterprise | | Company | Bitdefender | Cisco | | Headquarters | – | – | ### Use cases and capabilities | | Bitdefender GravityZone Extended Email Security | Cisco Secure Email Threat Defense | |---|---|---| | Microsoft 365 | Yes | Yes | | Ransomware Prevention | Yes | – | | Multi Tenancy | Yes | – | | Threat Analysis | – | Yes | ### Core features **Bitdefender GravityZone Extended Email Security** 10 features listed. Sign in on the page to see them. **Cisco Secure Email Threat Defense** 9 features listed. Sign in on the page to see them. ### Integrations **Bitdefender GravityZone Extended Email Security** 2 integrations listed. Sign in on the page to see them. **Cisco Secure Email Threat Defense** 3 integrations listed. Sign in on the page to see them. ## Bitdefender GravityZone Extended Email Security vs Cisco Secure Email Threat Defense FAQ Common questions when comparing Bitdefender GravityZone Extended Email Security vs Cisco Secure Email Threat Defense for email security platforms. ### What is the difference between Bitdefender GravityZone Extended Email Security and Cisco Secure Email Threat Defense? **Bitdefender GravityZone Extended Email Security**: Cloud-native email security platform with SEG and API-based protection. Built by Bitdefender. **Cisco Secure Email Threat Defense**: Email threat protection for Microsoft 365 with advanced detection capabilities. Built by Cisco. The table above shows where their features, integrations, deployment and company size fit differ. ### Who makes Bitdefender GravityZone Extended Email Security and Cisco Secure Email Threat Defense? **Bitdefender GravityZone Extended Email Security** is made by Bitdefender. **Cisco Secure Email Threat Defense** is made by Cisco. The vendor behind a product decides its roadmap, support, and longevity, so check each company's profile before you commit. ### Is Bitdefender GravityZone Extended Email Security a good alternative to Cisco Secure Email Threat Defense? Often, yes. Bitdefender GravityZone Extended Email Security and Cisco Secure Email Threat Defense are both Email Security Platforms products, and both cover Microsoft 365. Use the table above to see where features, deployment and company size fit differ. ## Related comparisons - [Bitdefender GravityZone Extended Email Security vs Mesh 365](https://cybersectools.com/compare/bitdefender-gravityzone-extended-email-security-vs-mesh-365) - [Bitdefender GravityZone Extended Email Security vs Cellopoint Cloud Email Security Solution](https://cybersectools.com/compare/bitdefender-gravityzone-extended-email-security-vs-cellopoint-cloud-email-security-solution) - [Bitdefender GravityZone Extended Email Security vs INKY Behavioral Email Security Platform](https://cybersectools.com/compare/bitdefender-gravityzone-extended-email-security-vs-inky-behavioral-email-security-platform) - [Cisco Secure Email Threat Defense vs Mesh 365](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-mesh-365) - [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 INKY Behavioral Email Security Platform](https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-inky-behavioral-email-security-platform) ## Alternatives to each - [See all Bitdefender GravityZone Extended Email Security alternatives](https://cybersectools.com/alternatives/bitdefender-gravityzone-extended-email-security) - [See all Cisco Secure Email Threat Defense alternatives](https://cybersectools.com/alternatives/cisco-secure-email-threat-defense) --- Source: https://cybersectools.com/compare/cisco-secure-email-threat-defense-vs-bitdefender-gravityzone-extended-email-security For AI agents: each product above has its own Markdown page (add .md to its URL, for example https://cybersectools.com/tools/bitdefender-gravityzone-extended-email-security.md). Every CybersecTools shortlist is listed at https://cybersectools.com/shortlists.md. More on Bitdefender GravityZone Extended Email Security and Cisco Secure Email Threat Defense: 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