What is a system architecture diagram?
A system architecture diagram gives everyone the same mental model of how the parts of an application talk to each other. This template shows a typical web product: browser and mobile clients go through an API gateway to three services, which use a database, a cache and a message queue for background work.
When to use it
- Design reviews and technical proposals.
- Onboarding engineers to an unfamiliar codebase.
- Explaining an incident: which component failed and what depended on it.
How to make a system architecture diagram in SketchFlow
- Step 1: Open the architecture template in SketchFlow.
- Step 2: Rename clients, services and data stores to match your system.
- Step 3: Use solid arrows for synchronous calls and dashed arrows for asynchronous messages.
- Step 4: Group related services inside a frame (F) to show a boundary such as a cluster or VPC.
- Step 5: Export as SVG for your design doc, where it stays sharp at any zoom.
Tips for a better result
- Draw one level of detail per diagram; link to deeper diagrams instead of cramming.
- Label arrows with the protocol or data when it matters (HTTPS, events).
- Keep a legend if you use colour for meaning.
Questions about this template
What should a system architecture diagram show?
The main components (clients, services, data stores, third parties), how they communicate, and any important boundaries such as networks or trust zones.
Why use a hand-drawn style for architecture?
A sketchy look signals that the diagram is a model for discussion, which invites feedback. You can lower the roughness in the properties panel for a cleaner look.
Can I use cloud provider icons?
You can insert any image you have the rights to with I. SketchFlow does not ship vendor icon sets.