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Sublime Platform is a free email security platforms tool. Cisco Secure Email Threat Defense is a commercial email security platforms tool by Cisco. Compare features, ratings, integrations, and community reviews side by side to find the best email security platforms fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Security teams with limited budgets or those building custom email detection logic will find real value in Sublime Platform; its Message Query Language lets you write behavioral rules that catch BEC and credential phishing variants off-the-shelf tools miss. The free, open-source model means no licensing friction and full transparency into detection logic, critical for teams that need to audit or customize their email stack. Skip this if you need native integration with your existing EDR or require managed threat hunting; Sublime is detection-focused and requires your team to own the tuning.
Cisco Secure Email Threat Defense
Mid-market and enterprise teams defending Microsoft 365 should choose Cisco Secure Email Threat Defense for its ability to hunt and remediate threats across your entire email history in real time, not just block at the gateway. The searchable threat telemetry and post-breach remediation capabilities address a real gap in most email platforms, which stop at detection and leave you manually digging through logs. Skip this if your organization runs heavy on Gmail or other non-Microsoft email infrastructure, or if you need advanced user behavior analytics layered on top of threat detection.
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.
Email threat protection for Microsoft 365 with advanced detection capabilities
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Common questions about comparing Sublime Platform vs Cisco Secure Email Threat Defense for your email security platforms needs.
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..
Cisco Secure Email Threat Defense: Email threat protection for Microsoft 365 with advanced detection capabilities. built by Cisco. headquartered in United States. Core capabilities include Advanced threat detection for known, emerging, and targeted threats, Malicious technique identification with business risk context, Real-time threat search and remediation..
Both serve the Email Security Platforms market but differ in approach, feature depth, and target audience.
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