Diagram template
A C4 system context diagram with a user, your system, and the external systems it depends on already placed, so you can describe architecture at the top level fast.
Overview
The C4 model describes software architecture at increasing levels of detail. The system context level, the highest, shows your system, the people who use it, and the external systems it talks to.
This template is the built-in C4 system context diagram in the Atlas Diagram Studio gallery. It opens with a user, your system, and external email and payment systems, connected with labelled relationships.
Because it is a live Diagram Studio document, you rename the systems and relationships directly, so the context diagram fits your architecture.
What is included
A person node representing the primary user of the system.
A central node for the system you are describing at context level.
Nodes for the external email and payment dependencies, ready to relabel.
Connectors labelled uses, sends, and charges so intent is explicit.
Movable nodes and editable relationships so the diagram matches your architecture.
How to use it
Go to /diagrams/templates and pick the C4 system context template.
Replace the central node with the system you are describing.
Relabel the external systems and connectors to match your real integrations.
Share the context diagram or export it once it is complete.
FAQ
Ready when you are
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