How to use the System architecture template

Start a board from it
Use this template opens a new Freero board with the System architecture template on it (sign up free first). On a board you already have, open Templates in the toolbar and search for “System architecture”.
Follow the instruction on the board
“Label every line with what it carries. Dashed lines are asynchronous. Keep one level of detail per diagram.”
Fill in each part
- Customers
- Web app React
- Mobile
- API service
- Auth
- Worker
- Postgres
- Job queue
- File storage
- Payments provider
- Email provider
Bring your team and your agents
Invite people to the board or share a link, and work on it together live. The timer is in the top bar, private mode and voting in the board menu, and Claude or ChatGPT can join through Freero’s MCP server.

Work on it with an AI agent

Connect an assistant once and it works on the board with you, with your permissions: by default it reads and proposes, and people decide.

You ask: “Fill in the System architecture board from these notes.”
What happens It reads the board, then proposes sticky notes for it. Nothing changes until someone on the board accepts them.
You ask: “Group what we wrote into themes and list the actions.”
What happens It proposes clusters with a title each and task cards for the actions, labelled with its name and yours.

System context sketch
The big picture of one system: who uses it, which other systems it talks to, and what flows between them.
Technical design doc
Lay out a technical design for review: context, goals and non-goals, the proposal, alternatives considered, risks and rollout.
Infrastructure capacity forecast
Forecast when each key resource runs out at current growth, so you can order, scale or redesign before it becomes an outage.
Sequence diagram
A sign-in flow as UML lifelines, activation bars, calls, replies and an alt fragment.
Data model (ERD)
An online shop’s tables and how they relate, drawn with crow’s-foot ends.
CI/CD pipeline
From pull request to production across four lanes, with BPMN events, tasks and gateways.