Cloud vs On-Premise Infrastructure Architecture Diagram

What this diagram shows

This diagram contrasts on-premise and cloud infrastructure architectures placed side by side, showing how the same application layers and services map differently across two deployment models. The left side represents infrastructure managed within an organisation's own data centre, while the right shows the equivalent components running on a cloud provider. The diagram illustrates the shift in responsibility boundaries, resource provisioning, and operational overhead between the two approaches, allowing viewers to see what changes when moving from self-hosted to cloud-based systems.

Key components

• On-Premise Infrastructure Stack — Represents hardware, networking, storage, and virtualisation fully controlled and maintained by the organisation within its own facilities.
• Cloud Provider Infrastructure Stack — Represents the same compute, storage, and networking capabilities delivered and managed by a third-party cloud provider such as AWS, Azure, or Google Cloud.
• Applications and Services Layer — Shows the application code, microservices, or software that runs identically on both platforms but with different underlying infrastructure management.
• Data Storage and Databases — Illustrates persistent data handling, whether self-managed database servers on-premise or managed cloud database services.
• Responsibility and Compliance Boundary — Delineates what the organisation must manage directly versus what the cloud provider manages, including patching, scaling, and security.
• Network and Connectivity — Depicts internal networking, firewalls, and access controls on-premise compared to cloud provider networking and hybrid connectivity options.
• Monitoring and Operational Tools — Shows observability infrastructure, logging, and alerting for on-premise systems versus cloud-native monitoring services.

When to use it

Use this diagram when comparing deployment options during infrastructure planning, communicating migration strategies to stakeholders, documenting architectural differences in hybrid or multi-cloud strategies, or evaluating cost and operational impact of on-premise versus cloud adoption. It is particularly valuable in decision-making discussions where teams need to understand what responsibilities shift when moving workloads between platforms.

Common mistakes

• Treating both architectures as having identical security layers without showing the different threat models and shared responsibility concepts unique to cloud providers.
• Overloading the diagram with too many implementation details such as specific instance types or exact data centre geography, which obscures the high-level comparison.
• Failing to show the responsibility boundary clearly, leaving ambiguity about who manages patching, scaling, backup, and disaster recovery in each model.

Adapting it to your system

Identify the specific applications or workloads you are comparing and list the key infrastructure components they depend on: compute, storage, networking, databases, and security services. On the left side, show the physical and virtual resources your organisation owns and operates. On the right, map the equivalent managed services from your chosen cloud provider. Add or remove layers such as disaster recovery, content delivery, or edge services based on your architecture. Use colour or icons to highlight the responsibility boundary, making clear which tasks shift from your team to the cloud provider.