How does Microsoft Defender for Endpoint compare with Carbon Black CB Defense?

Microsoft Windows Defender is a part of Windows 10 and is available at no additional cost. It offers basic protection against malware and viruses. For more comprehensive protection, you can upgrade to a paid subscription to Microsoft Defender Advanced Threat Protection. ADTP is a cloud-based platform that delivers real-time security insights and advanced threat protection for endpoints across your enterprise. It features behavioral detection analytics, anti-ransomware, and anti-phishing technologies. Microsoft Defender ATP starts at $15 per user per month. Volume discounts are available.

I have not used Microsoft Defender and only used Cortex XDR by Palo Alto Networks. My experience with Cortex is not good as you need to whitelist each and every exe file of each adn every computer. My recommendation for you is to go for Cynet360 MDR which is far better than Cortex in terms of auto detection and remediation. You will get genuine alert.

I would go for the one with the best independent threat intelligence, a platform that allows you to change, add, move IT and Security infrastructure without impacting your security platform.  I would also place a close attention to storage costs, service levels and the number of resources providing human intelligence on top of machine intelligence for investigation and incident response, all in one platform.  But I am biased ;-)