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OnUML pricing

Freemium#14 of 32 in AI Diagram Generators

OnUML costs from $4/mo on its cheapest paid plan; 5 plans in all, as listed on onuml.com — prices checked 20 Sep 2026.

8.0/10Editor score
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OnUML pricing at a glance

Plans Free planFreemium A usable free plan; paid tiers unlock the limits below. Prices checked 20 Sep 2026.
See plans on onuml.com

OnUML plans & pricing

PlanPriceKey limits
FreeFree $0 forever
  • 2 diagrams per project
  • 10 projects
  • 2 workspaces
  • 10 free model requests per day
Pro$4/mo $4/mo monthly$8/mo $8/mo monthly
  • 10 diagrams per project
  • Unlimited cloud projects per workspace
  • Unlimited workspaces
  • No daily limit on free model requests
  • 500 monthly included credits
Starter AI credits$4.90 one-time Credits expire 6 months after issuance
  • 240 credits
  • ~240 standard AI requests
  • ~20 premium AI requests
Popular AI credits$9.90 one-time Credits expire 6 months after issuance
  • 500 credits
  • ~500 standard AI requests
  • ~41 premium AI requests
Pro Pack AI credits$19.90 one-time Credits expire 6 months after issuance
  • 1,100 credits
  • ~1,100 standard AI requests
  • ~91 premium AI requests

Prices as published by the vendor on onuml.com, checked 20 Sep 2026; taxes and regional pricing may differ. We do not change a plan's price or its limits — this table is what the vendor's own pricing page said on that date.

What the price includes

  • Built for
    Solo, Small business
  • Free plan
    Yes
  • Paid from
    $4/mo
  • Mermaid support
    Yes

Our full OnUML verdict, fact sheet and score →

Prices checked by iTechGuides Editors · Editorial team · Updated Oct 2026

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