689Cloud SecureMail vs INKY Outbound Mail Protection: 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.

INKY Outbound Mail Protection

Mid-market and enterprise teams with Microsoft 365 or Google Workspace will get the most from INKY Outbound Mail Protection because it actually catches insider data exfiltration before it leaves the network, not after breach forensics. The tool maps directly to NIST PR.DS Data Security controls with real-time sensitive data detection on outgoing email, and integrates natively with your existing cloud email stack without added infrastructure. Skip this if your primary concern is inbound phishing or if you need DLP that covers file shares and endpoints; INKY is deliberately email-egress focused.