The blog post discusses the distinctions and security measures associated with custom-developed software and commercial off-the-shelf (COTS) software. Custom-developed software is proprietary and created in-house to meet specific business needs, with security beginning at the design phase and continuing through agile development, using tools like software composition analysis and static application security testing to detect vulnerabilities. Conversely, COTS software is commercially available without access to its source code, requiring organizations to conduct thorough security reviews of vendors and manage user access and data transfers diligently. The post emphasizes the importance of application security posture management (ASPM) in both contexts to maintain visibility and manage risks effectively. CrowdStrike provides tools like Falcon Cloud Security and Falcon Data Protection to aid in securing both types of software by offering insights into software usage and preventing data loss.