Best diagramming tools 2026
Top picks for diagramming tools 2026: Miro (teams wanting a broad, template-rich visual whiteboard for workshops and brainstorming as well as diagrams, free plan (3 editable boards, unlimited members); paid Starter from about $8 per user per month billed annually ($10 monthly)), Lucidchart (teams wanting purpose-built flowcharting, UML and network diagrams with deep Google Workspace and Microsoft 365 integration, free plan (3 documents, 60 shapes); paid Individual from about $7.95 per month billed annually ($9 monthly)), draw.io (diagrams.net) (solo users and teams wanting a completely free, open-source diagramming tool with full control over where diagrams are stored, free for the full-featured standalone app, desktop app and browser extension, with no paid tier; separate paid add-ons exist for Confluence and Jira Cloud integration). All 4 tools here are compared on pricing, free plans, features and platforms, verified against vendor sources.
Pricing and features verified against each vendor's published information on 2026-09-05. Sources linked below.
At a glance
| Tool | Free plan | Pricing from | Best for | Platforms |
|---|---|---|---|---|
| Miro | Yes | Free plan (3 editable boards, unlimited members); paid Starter from about $8 per user per month billed annually ($10 monthly) | teams wanting a broad, template-rich visual whiteboard for workshops and brainstorming as well as diagrams | Web, Windows, macOS, iOS, Android |
| Lucidchart | Yes | Free plan (3 documents, 60 shapes); paid Individual from about $7.95 per month billed annually ($9 monthly) | teams wanting purpose-built flowcharting, UML and network diagrams with deep Google Workspace and Microsoft 365 integration | Web, iOS, Android |
| draw.io (diagrams.net) | Yes | Free for the full-featured standalone app, desktop app and browser extension, with no paid tier; separate paid add-ons exist for Confluence and Jira Cloud integration | solo users and teams wanting a completely free, open-source diagramming tool with full control over where diagrams are stored | Web, Windows, macOS, Linux |
| Whimsical | Yes | Free plan (4 files, 100 AI actions); paid Starter from about $10 per editor per month billed annually ($12 monthly) | startups and product teams wanting flowcharts, wireframes, mind maps and docs together in one lightweight tool | Web, macOS, Windows |
The shortlist
1. Miro
Free planFounded 2011
Free plan (3 editable boards, unlimited members); paid Starter from about $8 per user per month billed annually ($10 monthly). Best for teams wanting a broad, template-rich visual whiteboard for workshops and brainstorming as well as diagrams.
- Infinite canvas whiteboard with 300+ templates
- Flowchart, mind map and UML diagram tools alongside sticky notes
- Miro AI assistant for diagram and summary generation
- Real-time multiplayer collaboration
2. Lucidchart
Free planFounded 2010
Free plan (3 documents, 60 shapes); paid Individual from about $7.95 per month billed annually ($9 monthly). Best for teams wanting purpose-built flowcharting, UML and network diagrams with deep Google Workspace and Microsoft 365 integration.
- Purpose-built flowchart, UML, ERD and network diagram shape libraries
- Microsoft Visio import and export
- Google Workspace and Microsoft 365 integrations
- Real-time collaboration with commenting
3. draw.io (diagrams.net)
Free planFounded 2005
Free for the full-featured standalone app, desktop app and browser extension, with no paid tier; separate paid add-ons exist for Confluence and Jira Cloud integration. Best for solo users and teams wanting a completely free, open-source diagramming tool with full control over where diagrams are stored.
- No feature restrictions or watermarks on the free app
- Apache 2.0 open source and self-hostable
- Diagrams save to your own storage (Google Drive, OneDrive, GitHub or local disk), never to draw.io's servers
- Native offline desktop app for Windows, macOS and Linux
Visit draw.io (diagrams.net) · draw.io (diagrams.net) alternatives
4. Whimsical
Free planFounded 2017
Free plan (4 files, 100 AI actions); paid Starter from about $10 per editor per month billed annually ($12 monthly). Best for startups and product teams wanting flowcharts, wireframes, mind maps and docs together in one lightweight tool.
- Flowcharts, wireframes, mind maps, sticky notes and docs in one workspace
- Unlimited free viewer seats on every plan, pay only for editors
- Built-in AI actions for diagram and content generation
- Fast, lightweight canvas built for quick product and engineering diagrams
Head-to-head comparisons
- Miro vs Lucidchart
- Miro vs draw.io (diagrams.net)
- Miro vs Whimsical
- Lucidchart vs draw.io (diagrams.net)
- Lucidchart vs Whimsical
- draw.io (diagrams.net) vs Whimsical
FAQ
- What are the best free diagramming tools?
- Tools with a free plan here include Miro, Lucidchart, draw.io (diagrams.net), Whimsical. Compare limits before committing.
- How many diagramming tools did this list compare?
- This page compares 4 tools, each linked to its own site.