etcd is an open source and highly available distributed key-value storage system and is commonly used in critical data storage and service discovery and registration use cases. It is focusing on:Simple: well-defined, user-facing API (gRPC)Secure: automatic TLS with optional client cert authenticationFast: benchmarked 10,000 writes/secReliable: properly distributed using Raftetcd and Redis both support key-value storage and can be set up in distributed systems. Also Redis supporst more key value types. But they are used in different use cases and have different focus areas given below differenc...