G2 Vendor Directory

RMail vs. KnowBe4 Email & Collaboration Security

A side-by-side comparison based on G2 review data.

MetricRMail

by RPost

KnowBe4 Email & Collaboration Security

by KnowBe4, Inc.

Overall rating4.94.5
Review count6376
Ease of use9.78.9
Ease of setup9.88.9
Quality of support9.79.0
Meets requirements9.69.1
NPS93.54838769.863014
Small Business63.8%29.7%
Mid-Market25.9%55.4%
Enterprise10.3%14.9%
Total page views207596
Total LLM citations487129

RMail

RMail® is the e-security platform by RPost®, a global leader since 2000. RMail specializes in elegantly easy to use email encryption for privacy and compliance, e-signatures, legal e-delivery proof, secure file sharing, email impostor protection, document rights management, and AI-infused services to prevent data leaks and human e-security errors. RMail installs into one’s existing Microsoft 365 Outlook, Gmail, Salesforce.com, or other email and business management systems. Install an RMail App: • Sender Selects: sender clicks the RMail “Send Registered” button and selects send features.

Pros

  • Ease of Use

KnowBe4 Email & Collaboration Security

KnowBe4 Email & Collaboration Security is the AI-native defense suite built to protect every conversation across Microsoft 365 and Google Workspace. Combining multi-engine behavioral AI with real-time user coaching, the platform stops inbound threats, prevents outbound data loss, and automates SOC response across the security lifecycle. Key Capabilities: - Inbound Protection (Defend): Multi-engine AI blocks zero-payload BEC, executive impersonation, quishing, and prompt injections that pass native mail filters.

Pros

  • Email Security
  • Protection
  • Ease of Use
  • Customer Support
  • Detection Efficiency
  • Setup Ease