What tools/services do you use for CTEM (continuous threat exposure management)?

We use several CTEM tools, but Ionix is our main platform. It quickly discovers assets, validates findings and ranks risks, helping us prioritize remediation.

Might not be what you define as CTEM, but we use BitSight for monitoring our external attack surface.  It finds assets we might not see with scanners.  Qualys has a module called Threat Protect that is good for surfacing what to work on.

Our core CTEM solution is Microsoft Defender for Endpoint, specifically the Threat and Vulnerability Management feature known as Exposure Management. It provides continuous visibility, prioritization, and remediation across our environment.