A3Sec CTEM vs ZEST Security: Side-by-Side Comparison (2026)

A3Sec CTEM: Managed CTEM service for continuous attack surface & threat exposure mgmt. built by A3Sec. 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..

ZEST Security: Agentic cloud exposure management platform with AI-driven remediation. built by ZEST Security. Core capabilities include AI-generated remediation fixes including Terraform code for cloud misconfigurations, Cloud vulnerability detection and remediation, Attack path identification and resolution..

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

A3Sec CTEM differentiates with 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. ZEST Security differentiates with AI-generated remediation fixes including Terraform code for cloud misconfigurations, Cloud vulnerability detection and remediation, Attack path identification and resolution.

A3Sec CTEM is developed by A3Sec. ZEST Security is developed by ZEST Security. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

A3Sec CTEM and ZEST Security serve similar Exposure Management use cases: both are Exposure Management tools. Review the feature comparison above to determine which fits your requirements.