PlantUML
Open-source diagramming tool for teams to create technical diagrams and software documentation
- Also known as
- plantuml
Available worldwide · Popular in: US
What is PlantUML?
A platform for software teams to generate UML diagrams and documentation. Available as a web-based tool with a GitHub browser extension and self-hosted deployment options.
PlantUML pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
Free with ads. Sponsorship from $1/month for ad-free access.
$1 monthly sponsorship
Ad-free access to plantuml.com
- Ad-free plantuml.com access
$5 monthly sponsorship
Support PlantUML development
- Support for PlantUML source code development
What PlantUML does
The capabilities that matter for diagramming, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment model
- Cloud saas
- Uml and erd logic enforcement
- ✓
- Bpmn business process modeling standard
- -
- Aws azure automated cloud architecture import
- -
- Data linked shapes excel sync
- -
- Visio vsdx file import export
- -
- Collaborative multiplayer real time editing
- -
- Confluence jira atlassian embeds
- -
- Google workspace office 365 sync
- -
- Slack ms teams chat embeds
- -
- SOC2 type ii
- -
- ISO 27001
- -
- Pricing model
- -
Platform & deployment
Independently observed- CLI
- Web
- Cloud / SaaS
- Self-hosted
Integrations (4)
Independently observed- GitHub•
- Dokuwiki•
- Asciidoc•
- Markdown•
Security & compliance
Known vulnerabilities: 0 (0 in the last 12 months) sourcea count reflects scale & disclosure, not quality
PlantUML FAQ
Common questions about PlantUML, answered from independent, dated evidence.
What is PlantUML?
An open-source application that generates visual diagrams from plain text descriptions. It enables users to create various diagram types including UML diagrams (sequence, class, activity, deployment) and other formats such as JSON, YAML, and EBNF, with browser-based editing and real-time preview. It is indexed under Diagramming.
Source: https://plantuml.com
Is PlantUML free to use?
PlantUML is open source, so it can be self-hosted and used at no licence cost. It is released under the LGPL-3.0 licence. Pricing changes often, so verify at source before relying on it.
Source: https://plantuml.com
What platforms does PlantUML support?
We have confirmed browser-based access to PlantUML. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.
Source: https://plantuml.com
Can PlantUML be self-hosted?
Yes. PlantUML can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.
Source: https://plantuml.com
What does PlantUML integrate with?
We have confirmed 4 integrations for PlantUML, including GitHub, Dokuwiki, Asciidoc and Markdown. This is what we could verify from public sources, so the vendor may support others we have not indexed.
Source: https://plantuml.com
Is PlantUML open source?
Yes. PlantUML is published under the LGPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.
PlantUML alternatives
Other diagramming we track, ranked by the same independent score.
- GliffyAn AI-powered diagramming solution for Confluence enabling teams to create technical diagrams collaborativelymedium · 54%
- CreatelyVisualize your business processes and collaborate with AI agents in real-timemedium · 51%
- Lucidchartlow · 38%
- MermaidA text-based tool for creating diagrams and charts that integrate with your development workflowlow · 32%
- CacooA collaborative visual workspace where teams can create and organize diagrams, wireframes, and flowcharts togetherlow · 30%
- yEd Graph EditorA software development kit for creating interactive diagrams and network visualizationslow · 26%
Compare PlantUML
Side by side against other diagramming, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for PlantUML, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Pricing transparency | 100 | 0.08 | 8.4 | ✓ |
| Development activity | 63 | 0.09 | 5.9 | ✓ |
| Release cadence | 93 | 0.05 | 4.9 | ✓ |
| Price level | 80 | 0.05 | 4.2 | ✓ |
| Capabilities | 29 | 0.09 | 2.7 | ✓ |
| Security score | 52 | 0.04 | 2.2 | ✓ |
| Stars | 78 | 0.03 | 2.0 | ✓ |
| Integrations | 20 | 0.09 | 1.9 | ✓ |
| Dependent projects | 5 | 0.06 | 0.3 | ✓ |
| Reliability | 0 | 0.06 | 0.0 | - |
| Security posture | 0 | 0.06 | 0.0 | - |
| Package downloads | 0 | 0.14 | 0.0 | - |
| Developer Q&A activity | 0 | 0.06 | 0.0 | - |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Activity
| Attribute | Value | Evidence |
|---|---|---|
| Commits last 30d | 100 | mediumsource · 2026-09-18 · 65% |
Adoption
Content
| Attribute | Value | Evidence |
|---|---|---|
| Faq | 6 items | mediumsource · 2026-09-10 · 66% |
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Deployment model: cloud_saas · Uml and erd logic enforcement: Yes | mediumsource · 2026-09-18 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 4 | mediumsource · 2026-09-02 · 60% |
Language
| Attribute | Value | Evidence |
|---|---|---|
| Primary | Java | highsource · 2026-09-18 · 90% |
License
| Attribute | Value | Evidence |
|---|---|---|
| Spdx | LGPL-3.0 | highsource · 2026-09-18 · 95% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | mediumsource · 2026-09-18 · 50% |
Pricing
Release
Security
Is PlantUML the right choice for you?
Tell us the job, the constraints and what you weigh most, and we will rank PlantUML against the rest of the diagramming we index, using the same dated evidence weighted your way.
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