Multi-cloud DR minimizes downtime across AWS, Azure, GCP. Pilot Light architectures keep minimal resources warm. Veeam and Rubrik orchestrate backups with immutability. Cross-cloud replication via Azure Site Recovery. Chaos engineering with Gremlin tests failover. RTO under 15 minutes via Terraform automation. Cost-optimized with spot instances. This withstands outages like the 2025 Azure incident, ensuring business continuity.