We built the tool
we wished existed.
SpoofShield was born from a simple frustration: after years working in security, we kept watching Business Email Compromise attacks succeed — not because companies lacked firewalls or spam filters, but because those tools can’t see what happens at the point of decision, inside Outlook.
Our Story
The gap no filter can close
Gateway filters, anti-spam engines, and secure email gateways all work at the network layer — scanning headers and metadata before the email reaches the inbox. They’re essential, but they’re also blind to what happens next.
The most damaging attacks — BEC, VIP impersonation, reply-chain hijacking — don’t trigger network filters. The emails arrive clean. The threat is in the context: the wrong sender domain for a familiar name, a new email address quietly added to an ongoing thread, an urgent wire request that looks like it came from the CFO.
We built SpoofShield to close that gap — running detection engines directly inside Outlook, at the moment a user opens an email and is deciding what to do about it.
Our Approach
Why Outlook-native?
Every other email security tool works outside the inbox. We work inside it.
At the point of decision
By the time an email reaches a user’s inbox, filters have already made their call. SpoofShield makes its call when the user opens the email — the moment that actually matters.
No gateway changes
Deploying SpoofShield requires no MX record changes, no email routing changes, no new mail servers. It’s one manifest file, deployed via Microsoft 365 Admin Center in minutes.
Works alongside everything
SpoofShield doesn’t replace your existing email security stack — it adds a layer those tools structurally cannot provide. It’s additive, not disruptive.
What We Stand For
Our values
The principles that shape how we build, price, and support SpoofShield.
Transparency first
We never read your emails. Every detection runs locally in Outlook. Only the metadata we absolutely need is ever transmitted — and we tell you exactly what that is.
Precision over noise
Alert fatigue kills security. We invest heavily in reducing false positives so that when SpoofShield fires, users take it seriously. Every engine is tuned for real-world BEC patterns.
Security by design
No email content leaves the device. No per-user agent to manage. No infrastructure footprint for end users. Security tools should not create new attack surfaces.
Built for teams, not just IT
We design for the person in Finance who is about to wire transfer money. The warning has to be unmissable, fast, and immediately actionable — not buried in a dashboard.