Egress Prevent review
A focused Microsoft 365 email DLP tool for preventing misdirected messages and exfiltration.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Egress Prevent, now offered as KnowBe4 Prevent, is a cloud-deployed outbound email security and data loss prevention product for organizations using Microsoft 365. It analyzes sender behavior, recipients, message content, and historical communication patterns to identify accidental misdelivery, suspicious data movement, and potential exfiltration. Its audience is teams that want to reduce human-error-driven email exposure while giving administrators tools for policy management, investigation, and oversight.
Pricing is listed per seat per month with monthly billing. The published plans show Prevent at $4.58, $6.25, $7.92, or $9.58, and Prevent Enterprise at $6.25, $8.33, $10.42, or $12.92. Prevent includes misdirected email prevention, data exfiltration prevention, Microsoft 365 integration, and detailed analytics. Prevent Enterprise adds custom DLP policies, misdirected content detection, and Microsoft Azure Information Protection (Purview) integration. The listed starting price is $4.58 per seat per month, with North America list pricing dated July 2025.
Its strongest fit is email-focused protection: contextual DLP and NLP analysis, recipient detection, historical communication baselines, and real-time user nudges work together before a message is sent. Administrators also get email event search, investigation tools, dashboards, and audit visibility. Microsoft 365 email gateway integration and support for web, iOS, and Android broaden access around the email workflow. Choose Prevent when outbound email is the central loss channel and Microsoft 365 is already part of the environment. Organizations seeking broader protection across many channels may prefer a wider DLP suite.
Egress Prevent pros and cons
- Where it wins
- Detects misdirected recipients and suspicious data movement
- Provides real-time nudges before users send email
- Includes investigation, analytics, and audit visibility
- Where it doesn't
- Focuses primarily on outbound email rather than full-channel DLP
- No free plan is available
- Advanced controls center on Microsoft 365 and Purview
Egress Prevent fact sheet, pricing and score →
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