Microsoft's serverless container service for running containers without managing servers. Like ordering takeout containers - you get what you need without owning a kitchen.
Development teams use Container Instances for quick testing and batch processing jobs without long-term infrastructure commitments.
All run containers without you managing servers. Azure Container Instances (ACI) runs a single container or a small container group on-demand. AWS Fargate runs containers as a serverless compute engine for ECS/EKS. Google Cloud Run runs stateless HTTP containers (request-driven) and can also run jobs. OCI Container Instances provides on-demand container execution on Oracle Cloud. The biggest differences are orchestration integration (ECS/EKS vs standalone), networking options, and whether the service is optimized for long-running tasks vs HTTP services.