PlantUML alternatives: 5 apps ranked by verified data
Common reasons people leave PlantUML: default visual style looks dated, and local use needs Java installed. We ranked 5 alternatives by how directly each one replaces PlantUML, then by reviews, real visits and how recently each app's facts were checked against its own website. Mermaid currently ranks first.
No alternatives match these filters.
Show all 5 alternativesThe best PlantUML alternative for…
The highest-ranked app in this list for each need.
Best PlantUML alternative for most people
MermaidSimpler syntax and native rendering on GitHub and GitLab without a server.
Best PlantUML alternative for a free option
D2Modern text-to-diagram language with nicer default layouts and themes.
Best PlantUML alternative for a free plan you can upgrade
GleekKeyboard-driven text-to-diagram tool in the browser with no setup.
Best PlantUML alternative for open source
StructurizrBetter for architecture: one model, many C4 diagrams kept in sync.
Best PlantUML alternative for self-hosting
MermaidSimpler syntax and native rendering on GitHub and GitLab without a server.
Best PlantUML alternative for Windows
D2Modern text-to-diagram language with nicer default layouts and themes.
Best PlantUML alternative for Linux
D2Modern text-to-diagram language with nicer default layouts and themes.
Best PlantUML alternative for working in the browser
MermaidSimpler syntax and native rendering on GitHub and GitLab without a server.
PlantUML alternatives: common questions
What is the best alternative to PlantUML?
Mermaid ranks first right now. Simpler syntax and native rendering on GitHub and GitLab without a server. D2 and Structurizr follow it in our ranking.
Is there a free alternative to PlantUML?
Yes. Mermaid (open source), D2 (open source), Structurizr (open source) and Gleek (free plan + paid) have a free option. Check each app's verified facts for current plan limits.
Is there an open-source alternative to PlantUML?
Yes: Mermaid, D2 and Structurizr. Mermaid and Structurizr can also be self-hosted.
Which PlantUML alternatives work on Linux?
D2 and StarUML run on Linux.
Why do people switch from PlantUML?
The complaints we hear most: default visual style looks dated; local use needs Java installed; syntax has many inconsistencies between diagram types.
How is this list ranked?
Every app is scored with the same published formula: how directly it replaces PlantUML, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.