Open source
Apache-2.0 View source →

Diagramming for flowcharts, wireframes and architecture, with no account required.

PriceFree

Why we recommend it

It stays useful precisely because it's unglamorous: it opens instantly, stores files wherever you want, and doesn't push you toward a subscription mid-diagram.

Strengths

  • No sign-up needed to start working
  • Stores files locally, in Drive, or in your own storage
  • Self-hostable for teams with data constraints

Drawbacks

  • Visual output is functional rather than beautiful
  • Real-time collaboration is weaker than Miro or FigJam
  • Large diagrams become sluggish

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