Chaos Engineering platforms enable teams to deliberately inject controlled failures — process kills, network latency/loss, resource exhaustion, region failures, dependency outages — into applications and infrastructure to validate that systems behave resiliently under fault conditions. Core capabilities include fault-injection primitives across compute, network, storage, and Kubernetes layers; experiment scheduling and blast-radius controls; automated hypothesis validation against SLOs; integration with observability for impact measurement; and safety controls that halt experiments when user-facing thresholds are violated. Leading vendors include Gremlin, Steadybit, Harness Chaos Engineering, LitmusChaos (OSS), Chaos Mesh (OSS), and AWS Fault Injection Service.