draw.io (diagrams.net) — #2 Alternative to Miro

Name: draw.io (diagrams.net)
Rating: 4.92 (1921 reviews)

Zero-account Apache-2.0 technical architecture, AWS/GCP/K8s, and UML diagramming standard

Stores diagrams wherever you choose—local disk, GitHub, GitLab, Nextcloud, or Confluence—with zero mandatory cloud account and full offline desktop builds.

License: Apache-2.0 · Pricing: Free & Open Source · Compare all Miro alternatives · Official Website