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Diagrams.so

Freemium#8 of 32 in AI Diagram Generators

Diagrams.so: A Draw.io-focused AI diagram generator with validation, imports, exports, and developer access. Ranked #8 of 32 in AI Diagram Generators by our editors (8.6/10); pricing: Free plan; best for draw.io architecture diagram users.

8.6/10Editor score

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Diagrams.so8.6 Visit Diagrams.so

At a glance

Editor score
8.6 / 10
Pricing
Free plan
Best for
Draw.io architecture diagram users
Free plan
Yes
Paid from
$10/mo
Mermaid support
No
Facts checked
20 Sep 2026

Where it wins
- Generates editable Draw.io diagrams from natural-language descriptions
- Includes architecture warnings, validation, and version history
- Offers REST API, MCP server, and Python and TypeScript SDKs
Where it doesn't
- Free exports are watermarked
- Free plan requires a BYO LLM key
- Does not support Mermaid

Our verdict on Diagrams.so

Diagrams.so is a browser-based AI diagram generator for architects, DevOps engineers, technical founders, and engineering teams. It turns natural-language descriptions into editable Draw.io diagrams and supports AWS, Azure, GCP, and Kubernetes icon libraries. The product also covers flowcharts, sequence diagrams, ERDs, and infrastructure diagrams, making it suited to teams that want architecture work to remain editable rather than limited to static images.

The Free plan costs $0 and includes BYO LLM key, architecture warnings, Voice-to-Diagram, unlimited .drawio imports, Community Gallery & Fork, and watermarked exports. Pro costs $10 per month with annual billing or $15 per month with monthly billing, adding One-click Fix all issues, Opinionated Mode, private diagrams, and clean exports. Power costs $16.67 per month with annual billing or $25 per month with monthly billing, adding Image to Diagram, PDF and DOCX to Diagram, a priority generation queue, and priority support.

Its ecosystem fit is a central strength: users can import and edit existing .drawio files, restore earlier versions, fork community diagrams, and export to PNG, SVG, PDF, JPG, and .drawio. REST API, MCP server, and Python and TypeScript SDK access extend the product beyond the browser. Architecture warnings and validation add a review layer for infrastructure diagrams. Choose Diagrams.so when editable Draw.io output, cloud icon libraries, and developer integrations matter. Choose another tool if Mermaid support or unwatermarked Free exports are essential.

Your product? Our editors can test Diagrams.so in depth and publish a review, labelled as paid · from $149/mo →

Diagrams.so pricing

Plans Free planFreemium A usable free plan; paid tiers unlock the limits above. Prices checked 20 Sep 2026.

See plans on diagrams.so

All 3 Diagrams.so plans and prices →

Diagrams.so fact sheet

Free plan	Yes
Paid from	$10/mo
AI diagram limit	Not verified
Mermaid support	No
Real-time collaboration	Not verified
Diagram import	Yes
Platform	Web
Export formats	.drawio, PNG, SVG, PDF, JPG
Money-back guarantee	14 days
Deployment	Cloud, Browser extension
Platforms	Web
Support	Email, Docs
Built for	Solo, Small business, Mid-market (editorial estimate)
Pricing	Free plan (source)
Website	diagrams.so
Facts checked	20 Sep 2026

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The editor score above is our own research. What this page doesn't have yet is a reader's view — what you used Diagrams.so for, what worked and what didn't. No stars are seeded and no review is paid for; an editor reads every one before it appears.

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Featured on iTechGuides

Diagrams.so is listed in our AI Diagram Generators directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 7 Oct 2026 · How we research and update