1. Container Orchestration: Azure Container Service is a platform that manages containerized applications across a cluster. On the other hand, Traefik is a lightweight, dynamic layer 7 reverse proxy that is specifically designed for microservices and containerized applications.
2. Resource Management: Azure Container Service provides a fully managed service that takes care of infrastructure provisioning and scaling, whereas Traefik is a software tool that needs to be installed and configured within your existing infrastructure.
3. Service Discovery: Azure Container Service offers integrated service discovery and load balancing through tools like Kubernetes, Docker Swarm, and Mesos, while Traefik focuses on providing automatic service discovery and configuration based on the active infrastructure's state.
4. Supported Platforms: Azure Container Service supports various platforms like Kubernetes, Docker Swarm, and Mesos, providing flexibility in choosing the right orchestration tool for your application. In contrast, Traefik is compatible with multiple container platforms but is primarily designed for environments utilizing Docker containers.
5. Load Balancing: Azure Container Service leverages built-in load balancers and networking solutions within its supported orchestration platforms, whereas Traefik acts as a standalone load balancer that can be integrated with various platforms using its dynamic configuration capabilities.
6. Custom Configuration: Azure Container Service offers predefined configurations and templates for deployment, making it easier to set up clusters, while Traefik allows for highly customizable configurations to tailor the routing and load balancing behavior according to specific application requirements.

In Summary, Azure Container Service focuses on managed orchestration across multiple platforms, while Traefik specializes in dynamic layer 7 load balancing for containerized applications.