Upcoming Event
Hadal Live Demo @ Dallas, TX
Join us in Dallas to explore how Hadal accelerates testing with predictive, self-healing automation.
Mariana AI
Protects your Microsoft 365 inbox from AI-generated BEC, deepfakes, and social engineering.
AI-generated attacks are flawless. Catching them requires reading the writer, not the words.
30 minFrom sign-up to your first protected mailbox
$2.9BLost globally to business email fraud last year
ZeroChanges to your email infrastructure required
Why Your Current Security Is Blind
Your gateway scans the surface. The threat is below it.
AI has made phishing flawless. Large language models now write impersonation emails that pass every grammar check, mimic your executives' exact tone, and contain no malicious links or attachments. Traditional Secure Email Gateways were built for a threat that no longer exists. They are looking for bad spelling in a world of perfect prose.
Threat 01 | Highest Financial Impact
AI-Generated Business Email Compromise
Attackers use LLMs to generate executive-impersonation emails requesting wire transfers, payroll changes, or vendor payment updates. Average financial loss per incident exceeds $125,000. Every major gateway scores these emails as Safe.
Threat 02 | Identity Fraud at Scale
Deepfake Writing Style Cloning
Using 20–50 leaked emails, attackers reconstruct a CFO or CEO's exact writing fingerprint: cadence, vocabulary, punctuation habits. The resulting email is mathematically identical to legitimate correspondence. No signature exists to detect it.
Threat 03 | Psychological Manipulation
AI-Driven Social Engineering
AI-crafted urgency, authority pressure, and requests to move conversations to personal channels. Engineered to bypass human judgment and every behavioral rule your SIEM has. The attack is the context, not the content.
How Mariana Works
Every email. Analyzed. Threats stopped before you see them.
Mariana AI connects to your Microsoft 365 environment via the Microsoft Graph API. No changes to your mail routing, no MX record updates. Every incoming email is silently analyzed through a three-layer AI pipeline. Threats are quarantined or flagged automatically, in under three seconds, before the recipient ever opens them.
Step 01: Connect
Instant M365 Integration
Mariana registers as an Azure Enterprise Application in your tenant. A real-time webhook listener receives every inbox event the moment it arrives. No mail rerouting, no latency added to your email flow. Setup takes under 30 minutes.
Step 02: Analyze
Deep AI Behavioral Scan
Two AI models run in parallel. A vector similarity engine compares the email's linguistic fingerprint against the sender's known writing identity. Simultaneously, Gemini 1.5 Pro evaluates psychological manipulation signals: urgency, authority pressure, financial intent, and channel-shift tactics.
Step 03: Act
Automated Threat Response
A combined risk score (0–100) drives the response. High-risk emails are automatically moved to quarantine before the recipient can open them. Medium-risk emails receive a prominent warning banner. Every action is logged for compliance with no manual intervention required.
See It Live
Every email. A verdict your team can act on.
The Mariana security console gives your team instant visibility into every monitored inbox. Each email receives a plain-English risk verdict: score, threat category, and a two-sentence explanation of exactly why it was flagged. No alert fatigue. No guesswork. Just clear decisions.
Your full threat picture in one view: high-risk count, tagged emails, and operational health, live.
Why Mariana AI
Built for the edge cases where traditional tools struggle.
Most email security tools break down in three real-world scenarios: new employees with no email history, users whose writing naturally evolves over time, and complex HTML emails that break when a warning banner is injected. Mariana was engineered specifically around these failure modes.
How Protection Works as Trust Builds Over Time
Behavior AnalysisWriting Fingerprint
Day 1New hire, no history yet
Week 3Profile starting to form
Month 2+Identity well established
New Employees
Risk-Aware Protection From Day One
Most platforms have a blind spot: no email history means no behavioral profile, which means no protection.
Mariana bridges the gap with a maturity-weighted system. From the very first email, it leans on AI intent analysis as the primary signal.
As the user's history grows, their personal writing identity takes over. Protection is never paused.
Zero-Touch Integration
Deployed in minutes. Invisible to your users.
Mariana integrates directly into Microsoft 365 via the Graph API as an Azure Enterprise Application. Your employees see no change to how they use Outlook. Your IT team makes no changes to email routing or DNS. Mariana operates entirely behind the scenes, reading, analyzing, and acting on threats before they reach the inbox.
M365 InboxMicrosoft Graph
Webhook ListenerCloud Run · Node.js
GCP Pub/SubDecoupling Buffer
AI PipelineVertex AI · Gemini
RemediationMicrosoft Graph