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Purpose-built
One clear problem per tool. No sprawling workspace required.
KumiStack / architecture tools
Small tools. Clearer systems.
Free, focused tools for software architects who want to reason about systems before building them.
Why KumiStack
Tools with a job to do.
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Free to use
Useful architecture work should not be held behind a paywall.
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Architect-first
Made for thinking through boundaries, flows, and trade-offs.
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Built by a practitioner
Opinionated by real project work, not feature checklists.
The first tool
A small catalog, by design.
Every KumiStack tool is independent, focused, and easy to adopt in an existing workflow.
Free · macOS · Apple Silicon
KumiDiagrams
A free native Mermaid diagram editor for software architects.
Meet the Mermaid editorflowchart LR
A[Architect] --> B{Mermaid}
B --> C[Clear system]