AltCatalog

Alternatives to draw.io

Free open-source diagramming for flowcharts, UML, and network diagrams

Alt Score

Alt Score · 93

How this alternative ranks. How it works →

Verified coverage 90%92
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

#1 of 8 in Diagramming tools

draw.io ranks #1 of 8 in Diagramming tools, with an Alt Score of 93. It is licensed under Apache-2.0, free from Free and available on Web, Windows, macOS and Linux. 13 of 13 checklist rows are verified against a public source.

draw.io (diagrams.net) is a free, open-source diagramming tool for flowcharts, UML, network and ERD diagrams, with desktop apps and Confluence/Jira integrations.

Most compared with LucidchartGliffyCacoo
Official site Suggest an edit Data history Work on draw.io? Claim this page
Who it's for

Individuals and teams who need free, no-lock-in diagramming for flowcharts, UML, ERDs, network/cloud architecture, and technical documentation, including privacy-conscious users and organizations already living in Confluence, Jira, Google Drive, or Microsoft 365.

What you get

A full-featured, Apache-2.0 open-source diagram editor with extensive shape libraries and templates for flowcharts, UML, ER diagrams, network and cloud architecture, plus Mermaid/PlantUML text-to-diagram, CSV-to-diagram generation, Claude-powered AI diagram generation, Visio (.vsdx) import, and export to SVG/PNG/PDF/HTML.

How it works

Runs as a free browser-based editor (app.diagrams.net) or offline desktop app for Windows/macOS/Linux, storing diagram files wherever you choose (device, Google Drive, OneDrive, Dropbox, GitHub) rather than on draw.io's own servers; real-time co-editing with shared cursors is available when files are stored on supported backends like Google Drive, OneDrive, or Confluence Cloud.

Where draw.io stands out

Verified capabilities most alternatives don't have.

Open source only 1 of 8 apps
Diagram-as-code (Mermaid/PlantUML) only 2 of 7 apps

See the full checklist

Why people leave draw.io

Dashed reasons are sourced facts; the rest are opinions. Vendors can dispute.

Sign in to add a reason — new reasons go through moderation before appearing.

Ranked alternatives

Ordered by Alt Score. Click any score to see the breakdown.

Sponsored Paid slot. Never affects the ranked order below. Promote here →
01

Lucidchart is a web-based diagramming application for flowcharts, UML, ERDs, network diagrams, and org charts, with real-time collaboration and data-linked shapes.

Proprietary WebiOSAndroid
Alt Score

Alt Score · 89

How this alternative ranks. How it works →

Verified coverage 90%88
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

02

Gliffy is a diagramming tool for flowcharts, UML, network diagrams, and org charts, best known for its native Confluence and Jira integrations.

Proprietary Web
Alt Score

Alt Score · 83

How this alternative ranks. How it works →

Verified coverage 90%81
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

03

Cacoo, by Nulab, is an online diagramming tool for flowcharts, wireframes, network diagrams, and org charts with real-time team collaboration.

Proprietary Web
Alt Score

Alt Score · 79

How this alternative ranks. How it works →

Verified coverage 90%77
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

04

SmartDraw is a diagramming application for flowcharts, org charts, floor plans, UML, and ERDs, with automation, templates, and enterprise integrations.

Proprietary WebWindowsmacOS
Alt Score

Alt Score · 79

How this alternative ranks. How it works →

Verified coverage 90%77
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

05

Creately is a visual collaboration and diagramming platform for flowcharts, UML, ERD, and org charts, with data-linked shapes and real-time collaboration.

Proprietary Web
Alt Score

Alt Score · 76

How this alternative ranks. How it works →

Verified coverage 90%73
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

06

Eraser is a docs-and-diagrams tool for engineering teams, featuring diagram-as-code, AI diagram generation, and architecture/sequence/ERD diagrams.

Proprietary Web
Alt Score

Alt Score · 72

How this alternative ranks. How it works →

Verified coverage 90%69
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

07

Whimsical is a collaborative visual workspace for flowcharts, wireframes, mind maps, and docs, geared toward fast, structured diagramming for product teams.

Proprietary WebmacOSWindowsLinux
Alt Score

Alt Score · 68

How this alternative ranks. How it works →

Verified coverage 90%65
Visibility 10%100

Verified coverage = sourced yes and partial answers in the category checklist. Visibility = relative app-page views on AltCatalog over 30 days, neutral below 500 category views. Payment, votes, and vendor opinions are never score inputs.

Feature comparison

Rows come from the Diagramming tools checklist (17 rows). Human-verified cells only. ? means the value has not been verified.

Comparing draw.io Lucidchart × Gliffy × Cacoo × SmartDraw × Creately ×
+ Add app
Eraser Whimsical
Diagramming tools checklist draw.ioLucidchartGliffyCacooSmartDrawCreately
Pricing model
Starts at
License
Platforms
Flowcharts & org charts
UML diagrams
ERD / database diagrams
Shape libraries / stencils
Templates
Real-time collaboration
Diagram-as-code (Mermaid/PlantUML)
AI diagram generation
Data-linked diagrams
Import Visio (.vsdx)
Export (SVG/PNG/PDF)
Open source
Free tier
verified pending unknown (?) Click any cell to view its source or propose a value
Sources & verification 18

Every fact and feature listed for draw.io is verified against its own pages. Each alternative is sourced on its own page.

  • Starts at Free verified 2026-07-17

    The draw.io diagramming app (web and desktop) has no cost; only the separate Confluence/Jira Marketplace apps are paid.

    draw.io is the world's most widely used diagramming application and it's free to use and deploy yourself.
    https://www.drawio.com/docs/about/
  • License Apache-2.0 verified 2026-07-17

    LICENSE file at the root of the jgraph/drawio GitHub repo (dev branch).

    Apache License Version 2.0, January 2004
    https://raw.githubusercontent.com/jgraph/drawio/dev/LICENSE
  • Pricing model Free verified 2026-07-17

    The core web/desktop diagram editor is entirely free with no paid tier. Monetization comes from a separate product line: paid draw.io apps for Atlassian Confluence/Jira (per the same page: "When compa

    draw.io is the world's most widely used diagramming application and it's free to use and deploy yourself. ... Free and open. The draw.io editor is Apache 2.0 licensed. No artificial scarcity, no Enter
    https://www.drawio.com/docs/about/
  • Platforms Web, Windows, macOS, Linux verified 2026-07-17

    Desktop installers (.exe, .dmg, .AppImage/.deb/.rpm) confirmed on the jgraph/drawio-desktop GitHub releases page.

    Install our offline desktop app, available on Windows, MacOS and Linux. ... Use our free online editor in your browser and on mobile and touchscreen devices.
    https://www.drawio.com/docs/features/
  • Status active verified 2026-07-17

    Latest tagged release v30.3.14 shown on the GitHub releases page, published 2026-07-17 (per repo's own release timestamps) — same day as this research, indicating very active, ongoing development.

    v30.3.14
    https://github.com/jgraph/drawio/releases
  • Flowcharts & org charts Yes verified 2026-07-17
    Flow charts let you visually describe a process or system. The shapes and very short labels let readers quickly understand what they need to do.
    https://www.drawio.com/docs/getting-started/basic-flowchart/
  • UML diagrams Yes verified 2026-07-17

    Page also lists dedicated sub-pages for UML Activity, Class, Communication, Component, Sequence, State machine, Use case diagrams, etc.

    UML notation is one of the most popular technical diagramming stan
    https://www.drawio.com/docs/diagram-types/uml/
  • ERD / database diagrams Yes verified 2026-07-17
    In draw.io, entity relationship diagrams have their own shape library, and use the extended table tools in the Arrange tab of the format panel.
    https://www.drawio.com/docs/diagram-types/entity-relationship-tables/
  • Shape libraries / stencils Yes verified 2026-07-17
    Drag and drop shapes from the shape libraries and drag to draw connectors between them. ... Search for shapes, including in open-source icon libraries.
    https://www.drawio.com/docs/features/
  • Templates Yes verified 2026-07-17
    Templates give you a starting point when you create a new diagram. ... Templates are organised into logical categories on the left of the dialog.
    https://www.drawio.com/docs/manual/insert/insert-template/
  • Real-time collaboration Partial verified 2026-07-17

    draw.io is file-based; live shared-cursor real-time co-editing only works when the diagram is stored on specific supported backends (Google Drive, OneDrive, Confluence Cloud, Nextcloud). Local/device-

    Real-time collaboration is available when you store your diagram files in Microsoft OneDrive or in Google Drive. ... Collaborative ediiting works with draw.io in: Confluence Cloud. Google Drive. Micro
    https://www.drawio.com/docs/manual/collaboration/concurrent-editing/
  • Diagram-as-code (Mermaid/PlantUML) Yes verified 2026-07-17

    PlantUML also supported (https://www.drawio.com/docs/manual/insert/insert_plantuml/), though that doc notes the PlantUML feature is 'currently under active development to replace the current serverles

    You can describe many different types of diagrams in text using the Mermaid syntax. In the draw.io editor, click Arrange > Insert > Mermaid.
    https://www.drawio.com/docs/manual/insert/insert-mermaid/
  • AI diagram generation Yes verified 2026-07-17
    The AI features accept natural language prompts from users describing the diagram they wish to create. The model returns structured mxGraph XML, which draw.io renders as an editable diagram. ... draw.
    https://www.drawio.com/docs/manual/generate/ai-models/
  • Data-linked diagrams Partial verified 2026-07-17

    Diagrams can be generated from CSV data and columns attached as shape metadata, but this is a one-time import/generation, not a live/refreshing data link.

    You can create a diagram automatically from a combination of formatting information and CSV data from a spreadsheet. ... Any columns that you don't ignore here, are added to the shape as metadata.
    https://www.drawio.com/docs/manual/insert/insert-from-csv/
  • Import Visio (.vsdx) Yes verified 2026-07-17

    The web app (app.diagrams.net) supports drag-and-drop .vsdx import; older legacy .vsd/.vdx/.vss formats are not supported directly and the Desktop app specifically lacks .vsd import.

    While .vsd, .vdx and .vss import is not supported in draw.io, you can convert to modern .vsdx formats first, and then to draw.io via our free web application at app.diagrams.net ... draw.io will autom
    https://www.drawio.com/docs/manual/import/vsd-import-desktop/
  • Export (SVG/PNG/PDF) Yes verified 2026-07-17

    Sitemap confirms dedicated docs pages for export-to-svg, export-to-png, and export-to-pdf under https://www.drawio.com/docs/manual/export/.

    Export and publish
    https://www.drawio.com/docs/manual/export/
  • Open source Yes verified 2026-07-17

    Also stated on https://www.drawio.com/docs/about/: "The draw.io editor is Apache 2.0 licensed."

    Apache License Version 2.0, January 2004
    https://raw.githubusercontent.com/jgraph/drawio/dev/LICENSE
  • Free tier Yes verified 2026-07-17
    Free and open. The draw.io editor is Apache 2.0 licensed. No artificial scarcity, no Enterprise tier for SSO.
    https://www.drawio.com/docs/about/

FAQ

Yes. Lucidchart, Gliffy and Cacoo have a free tier or are fully free. Free-tier limits in the comparison table are verified and dated.