A3Sec CTEM vs Reach Security - MS E3/E5 Optimization: 2026 Comparison

A3Sec CTEM: Managed CTEM service for continuous attack surface & threat exposure mgmt. built by A3Sec. headquartered in Spain. Core capabilities include Continuous asset discovery and mapping, including unknown assets, with a dynamic inventory, Real-time visibility into all assets and their exposure levels, Automated attack simulations to validate vulnerability exploitability..

Reach Security - MS E3/E5 Optimization: Optimizes Microsoft E3/E5 security configs using real-world attack data. built by Reach Security. headquartered in United States. Core capabilities include Continuous evaluation of Microsoft E3/E5 security configurations, Mapping of security controls to real-world attack patterns, Identification of underutilized or misconfigured Microsoft security features..

Both serve the Exposure Management market but differ in approach, feature depth, and target audience.