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Diagrams.net

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Free, secure diagramming for flowcharts, UML, and more

DiagrammingProductivityUI/UX Design
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Reviews onCapterraSourceForge
243 reviews tracked

The Bottom Line

Entry price

Free, no paid tier

Biggest pro

Completely free for individual use with no feature restrictions

Biggest con

Atlassian integration (Confluence/Jira) requires a paid license

TL;DR - Diagrams.net

  • Free, open-source diagramming tool for flowcharts, UML, ERD, network diagrams, and more
  • No login required, works in browser or as a desktop app with flexible storage options
  • Paid only for Atlassian Confluence/Jira integration; individual use is completely free
Pricing: Free forever
Best for: Individuals & startups
3.6/5 across review platforms

What is Diagrams.net?

Editorial review
Diagrams.net (also known as draw.io) is a free, open-source diagramming tool for creating flowcharts, network diagrams, UML, ERD, BPMN, and architectural drawings. It runs in the browser with no login required, stores files wherever you choose (Google Drive, OneDrive, GitHub, locally), and offers a desktop app for offline use. The tool emphasizes security-first design with no vendor data access, real-time collaboration, and AI-powered diagram generation, all at zero cost for individual use.

Available on: Web, Chrome

how we evaluateSourcediagrams.net ↗

Pros & Cons

Pros

  • Completely free for individual use with no feature restrictions
  • No account or login required, instant access via browser
  • Open-source with transparent security and self-hosting option
  • Files stored in your own cloud or locally, no vendor lock-in
  • Broad diagram type support from flowcharts to cloud architecture
  • Active development with modern features like AI generation and real-time collaboration

Cons

  • Atlassian integration (Confluence/Jira) requires a paid license
  • UI feels utilitarian compared to polished competitors like Lucidchart or Miro
  • Real-time collaboration is newer and less mature than dedicated whiteboard tools
  • No built-in presentation mode or slide deck export
  • Limited template gallery compared to commercial diagramming tools

Ratings Across the Web

3.6(243 reviews)
Capterra2 reviews
4/5
SourceForge241 reviews
3.5/5

Ratings aggregated from independent review platforms. Learn more

Key Features

Free browser-based diagramming with no login or registration requiredFlowcharts, UML, ERD, BPMN, network, and architecture diagram supportReal-time collaboration with shared cursorsAI-powered diagram generation via OpenAI integrationStorage flexibility: Google Drive, OneDrive, Dropbox, GitHub, GitLab, or localDesktop app for Windows, macOS, and Linux (offline capable)Atlassian Confluence and Jira integration (paid add-on)VSCode extension for developer workflowsExtensive shape libraries including AWS, Azure, GCP, and Cisco iconsOpen-source under Apache 2.0 license with self-hosting option

Pricing

Free

Diagrams.net is completely free to use with no hidden costs.

View pricing

Reviews

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3.6/5

Across 243 verified user reviews on SourceForge, Capterra

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Still deciding?

Most buyers shortlist 2 or 3 tools before committing. Pull a side-by-side comparison or browse the full alternatives shortlist below.

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Diagrams.net FAQ

How does Diagrams.net support different diagram types?

Diagrams.net offers broad support for various diagram types, including flowcharts, network diagrams, UML, ERD, BPMN, and architectural drawings. This allows users to create a wide range of visual representations for different needs.

What kind of user benefits most from Diagrams.net?

Diagrams.net is ideal for individual users who need a free, secure, and versatile diagramming tool without vendor lock-in. It suits those who prioritize data ownership and require support for many diagram types.

How is Diagrams.net priced?

Diagrams.net is free to use for individual users, requiring no paid plan to access its full features. There are no feature restrictions for individual use.

Can Diagrams.net integrate with Atlassian products like Confluence or Jira?

While Diagrams.net can integrate with Atlassian products such as Confluence and Jira, this functionality requires a paid license. The core individual use of the tool remains free.

How does Diagrams.net compare to Lucidchart regarding user interface?

Compared to Lucidchart, Diagrams.net's user interface is often described as more utilitarian. While functional, it may feel less polished than some commercial competitors.

What are the storage options for diagrams created with Diagrams.net?

Diagrams.net allows users to store their files wherever they choose, including cloud services like Google Drive, OneDrive, and GitHub, or locally on their device. This provides flexibility and prevents vendor lock-in.

Does Diagrams.net offer real-time collaboration features?

Yes, Diagrams.net includes real-time collaboration capabilities, allowing multiple users to work on diagrams simultaneously. This feature is actively developed, though it is newer compared to dedicated whiteboard tools.

Source: diagrams.net

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