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yUML review

Freemium#12 of 32 in AI Diagram Generators

A text-first diagramming tool with AI assistance, editable DSL, APIs, and broad diagram support.

8.2/10Editor score
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

yUML is a web-based, text-driven diagramming tool for software teams, writers, founders, educators, and AI builders. Users describe diagrams in yUML's DSL, use AI assistance for text-to-diagram generation and DSL correction, then edit the underlying text. It supports class, activity, use case, sequence, state, C4, journey, roadmap, timeline, and chart diagrams, with SVG and PNG output. Multiple visual styles include clean, sketch, napkin, midnight, and blueprint.

Pricing separates experimentation from private, maintainable diagram work. The Free plan includes public diagrams, limited diagram size, watermarked exports, and community support. Pro costs $5 per user per month when billed monthly, or $50 per user per year when billed annually. Both paid options add private diagrams, unlimited diagram size, unlimited version history, no watermark, and Developer API access. The paid AI allowance is 250 credits per month. Enterprise adds unlimited users, single sign-on, self-hosted deployment, custom contracts and SLAs, plus dedicated onboarding and support.

The main advantage is the editable text layer: diagrams can be corrected, versioned, rendered programmatically, and embedded through URL and POST APIs. Integrations include Confluence, MediaWiki, DokuWiki, and Google Mail. That makes yUML a practical fit for documentation workflows, generated architecture views, and teams that prefer text over canvas editing. Choose it if DSL-based authoring, API rendering, or self-hosting matters. Choose another tool if you need a desktop or mobile platform, or if your team prefers direct visual drawing without a text-centered workflow.

yUML pros and cons

  • Where it wins
    • Editable yUML DSL keeps diagrams text-based and revisable.
    • Supports UML, C4, journeys, roadmaps, timelines, and charts.
    • APIs, version history, SVG/PNG export, and enterprise self-hosting.
  • Where it doesn't
    • The Free plan limits size and adds public visibility and watermarks.
    • The product is available on the web platform.
    • The workflow centers on learning and writing yUML text.

yUML fact sheet, pricing and score →

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