What is Multi-Cloud Security? Challenges & Best Practices

Multi-cloud security involves protecting data, applications, and infrastructure consistently across two or more cloud providers. Key challenges include fragmented identity management (AWS IAM vs Azure RBAC vs GCP IAM), visibility gaps, inconsistent compliance controls, and knowledge silos between cloud teams. Best practices covered include unified security posture management via CSPM/CNAPP platforms, centralized observability and logging, policy-as-code enforcement, IaC-based security scanning, and cross-cloud threat modeling. The tooling stack is broken down into three layers: posture/prevention (Wiz, Prisma Cloud, Orca), detection/analytics (SIEM like Splunk), and response/automation (SOAR). The post also promotes Spacelift as an IaC orchestration platform with built-in policy-as-code and security features.