Attic Bouncer vs Messageware OWA Guard: Side-by-Side Comparison (2026)

Attic Bouncer

Startup and SMB security teams that lack dedicated phishing infrastructure will find Attic Bouncer's real-time interception of fake Microsoft 365 login pages worth the browser plugin friction. The tool covers three NIST CSF 2.0 functions,identity management, continuous monitoring, and user awareness,and catches the redirect attacks and credential theft attempts that traditional email filters routinely miss. Skip this if your organization has already standardized on advanced authentication like passwordless sign-in or conditional access policies that block anomalous logins at the platform level; Attic Bouncer is a band-aid for missing MFA enforcement, not a replacement for it.

Messageware OWA Guard

SMB and mid-market teams defending on-premises Exchange will find OWA Guard's value in stopping brute-force and credential-stuffing attacks before they land, which most native Exchange controls don't handle well. The tool logs every logon attempt with geo-location and lets users review their own activity history in real time, covering the NIST access control and continuous monitoring functions that matter most for mail compromise. Skip this if your organization has already migrated to cloud-only Microsoft 365 or runs a heterogeneous identity environment; OWA Guard is built narrowly for Exchange OWA and won't extend beyond it.