A3Sec CTEM vs Siemba Continuous Threat Exposure Management: Side-by-Side Comparison (2026)

A3Sec CTEM

Mid-market and enterprise security teams drowning in unknown assets and exposure backlogs will see immediate value in A3Sec CTEM's continuous discovery paired with automated attack simulation; it forces prioritization by actual exploitability rather than CVE noise. The vendor's coverage across NIST ID.AM, ID.RA, and DE.CM reflects genuine strength in asset mapping and risk contextualization where most exposure tools leak. Skip this if your organization prioritizes incident response over exposure prevention or lacks the resources to act on continuous remediation workflows; A3Sec assumes you can operationalize findings at scale.

Siemba Continuous Threat Exposure Management

Mid-market and enterprise security teams with fragmented pentesting and vulnerability scanning workflows will consolidate tooling around Siemba's attack surface mapping and AI-driven prioritization. The platform covers ID.AM, ID.RA, and DE.CM across NIST CSF 2.0, meaning it handles asset discovery, risk quantification, and continuous monitoring without requiring separate tools for each function. Skip this if your organization has mature internal pentesting capability and already owns a dedicated DAST platform; Siemba's strength is replacing multiple point solutions, not augmenting a best-of-breed stack.