689Cloud SecureMail vs MX Layer Email Data Leak Prevention: Side-by-Side Comparison (2026)

689Cloud SecureMail

SMBs and mid-market teams handling sensitive file attachments over Gmail or Outlook will find 689Cloud SecureMail's link-based IRM approach cuts through the complexity of traditional DLP; you get granular controls (view-only mode, revocation, watermarking, print blocking) without heavy infrastructure. The tool covers PR.DS and PR.AA under NIST CSF 2.0, meaning access and data handling are actually enforced at the file level, not just the gateway. Skip this if your org needs on-premises deployment or integrated secure collaboration; 689Cloud is attachment-centric, not a replacement for teams platforms.

MX Layer Email Data Leak Prevention

Mid-market and enterprise teams handling sensitive customer or financial data need MX Layer Email Data Leak Prevention for its pattern and keyword matching across headers, body text, and attachments in real time, catching leaks that rule-based gateways routinely miss. The tool covers both inbound and outbound scanning with customizable response actions like quarantine and secure messaging delivery, addressing the full PR.DS Data Security scope. Skip this if your organization relies heavily on third-party integrations or needs advanced user behavior analytics; MX Layer is narrowly focused on email content inspection, not anomaly detection across your broader email ecosystem.