Email security for
Microsoft 365
Sublime works alongside Microsoft Defender for Office 365, adding autonomous, org-specific detection that continuously expands as threats evolve. Stop more attacks, automate triage, and close coverage gaps in hours.
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How Sublime extends Microsoft 365 security
Sublime adds an autonomous detection and response layer to Microsoft 365 that’s tailored to your environment, transparent by design, and built to outpace attackers.
Email security built for Microsoft 365
Autonomous, org-specific detection that adds a tailored layer on top of Defender to stop targeted attacks and cut triage time.
Detect and block targeted and novel email attacks
Org-specific coverage that reasons through intent, behavior, and content to catch targeted phishing, BEC, and vendor impersonation – with transparent logic behind every decision.
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Automate abuse mailbox triage and investigation
ASA (Autonomous Security Analyst) triages, investigates, and resolves user-reported emails in seconds. ASA classifies threats, delivers auditable verdicts, and remediates automatically so analysts can focus on what actually matters.
Continuously expand detection as threats evolve
ADÉ (Autonomous Detection Engineer) analyzes your email environment, generates new org-specific detections, backtests them, and deploys coverage in hours, not weeks. No vendor queue. No manual tuning. Full visibility into every rule so your team can inspect, trust, and act on it.
Detect more targeted attacks
Sublime adds a layer of org-specific detection on top of your existing controls, improving precision against targeted phishing, vendor impersonation, and BEC with fewer false positives that interrupt legitimate business workflows.
Give analysts their day back
ASA resolves user-reported email in seconds by triaging, classifying, and remediating automatically with a full audit trail. What used to be hours of daily queue work becomes a closed loop your team can verify at a glance.
Close coverage gaps before attackers do
Every missed attack is a window of exposure. ADÉ turns that window into hours by generating, backtesting, and deploying new org-specific detections automatically. No vendor queue. No waiting weeks for a rule update. No logic you can't see or trust.
Layered email security for Microsoft 365
Keep Microsoft's native controls and add Sublime for organization-specific precision and agentic automation that saves your team time every day.
Layered by design
Sublime adds tailored, org-specific detection to run on top of Microsoft Defender for Office 365 that is transparent by design and continuously expanding as threats evolve.
Built for trust
Start with a human in the loop. Review decisions, verify the logic, and enable autonomous action when your team is ready. Every call Sublime makes is fully visible with no black box, and no guesswork.
Reduces workload
Sublime is purpose-built to eliminate abuse mailbox work and investigation overhead, not add another noisy dashboard your team has to manage.
Proof from real teams
20x
attacks automatically prevented
95%
of user-reports triaged by ASA
~100hours
reclaimed annually by analysts
See Sublime in your Microsoft 365 environment
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What our customers are saying
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The black box approach to email security no longer works.
It reduces visibility on how
Brex may be attacked and
the tactics and techniques
used by attackers.
With Sublime, we now have transparency and the confidence to keep up with emerging threats.
Mark Hillick
CISO, Brex
The ability to automate remediations with high confidence and minimize manual reviews unlocks a new level of efficiency in our SOC. It’s hard to imagine going back to life before Sublime.
JJ Agha
CISO, Fanduel
What I love about the platform is that it just works. I’m so tired of all these tools I have to futz with, and Sublime is just easy.
Jason Kikta
CISO, Automox
With Sublime, we no longer wait weeks for vendor updates. Our team reacts instantly - which is critical for our fast-moving environment.
FAQs about Sublime Email Security for Microsoft 365
Does Microsoft 365 include email security?
Yes. Microsoft 365 includes email security, and many organizations use Microsoft Defender for Office 365 as the foundational layer for phishing and malware protection.
Why do we need a layered approach to stop targeted phishing and BEC attacks?
Because detection has a half-life. The moment any coverage is deployed, attackers probe it and replicate evasions at scale. A layered approach that adds org-specific, continuously adapting detection means your defenses reflect your current attack profile, instead of leaving a window of exposure every time the threat landscape shifts.
How does Sublime improve email security for Microsoft 365 environments?
Sublime complements Microsoft 365 with adaptive, org-specific detection that blocks targeted phishing and BEC, and deploys AI agents (ASA and ADÉ) that automate triage and continuously generate new detection coverage as threats evolve. Security teams catch more attacks, act with confidence, and spend significantly less time on manual investigation.
Can we see why Sublime flagged a message?
Yes. Sublime shows the exact signals, logic, and context behind every detection so that analysts can investigate faster, make confident decisions, and build trust in what the system is doing. And when something needs adjusting, you can act on it directly without filing a vendor ticket.
Do we need to replace our current email security solution to use Sublime?
No. Sublime is designed to layer on top of existing Microsoft 365 security controls, adding org-specific detection and autonomous triage on top.
Can Sublime detect targeted or unknown email attacks?
Yes. Sublime's Distributed Detection Model analyzes message intent, behavior, and content specific to your organization to catch targeted phishing, BEC, and novel attacks. It doesn't rely on known indicators alone.
How does Sublime help reduce workload for security teams?
ASA (Autonomous Security Analyst) automatically triages user-reported emails, classifies threats, and remediates, delivering auditable verdicts in seconds. What used to consume hours of daily analyst time becomes a closed loop that runs without intervention.
How quickly can Sublime be deployed in a Microsoft 365 environment?
Teams can connect Sublime via API in minutes and begin evaluating detection and response value without disrupting mail flow.
Is Sublime suitable for enterprise security teams and complex environments?
Yes. Sublime is built for security teams managing complex environments at scale, delivering high-fidelity detection, transparent logic your team can audit, and autonomous operations that reduce analyst burden without sacrificing control. It deploys as cloud SaaS, single-tenant SaaS, or self-hosted, depending on your requirements.
Now is the time
See how Sublime delivers autonomous protection by default, with control on demand.
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