Assetnote Attack Surface Management Tool vs s3viewer: Side-by-Side Comparison (2026)

Assetnote Attack Surface Management Tool

Mid-market and enterprise security teams drowning in undiscovered external assets will find Assetnote Attack Surface Management Tool's hourly scanning and automated enrichment actually catches the forgotten domains and shadow IT that quarterly pen tests miss. The platform covers NIST ID.AM and ID.RA rigorously, with zero-day research and PoC exploits included rather than sold separately. Skip this if your org needs continuous monitoring of internal infrastructure or if you expect one tool to handle both external discovery and remediation workflow; Assetnote excels at finding and classifying what's out there, not orchestrating fixes across teams.

s3viewer

Security teams conducting external attack surface reconnaissance on cloud infrastructure should use s3viewer for its speed in discovering publicly exposed storage across multiple cloud providers and protocols from a single interface. The tool is free and requires no credentials to operate, making it immediately deployable for red team assessments or initial exposure audits without procurement friction. Skip this if you need ongoing monitoring or remediation workflows; s3viewer is a point-in-time discovery tool, not a continuous posture management platform.