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StarUML alternatives: 4 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave StarUML: no real-time collaboration, and licence is per device. We ranked 4 alternatives by how directly each one replaces StarUML, then by reviews, real visits and how recently each app's facts were checked against its own website. Visual Paradigm currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1Lucidchart logoLucidchartFree plan + paidNoWeb, iOS, Android4 of 457.2
  1. Lucidchart logo

    1. LucidchartTop pick

    Best for: Teams that want a shared, browser-based diagram library tied into their office and dev tools

    Free plan + paidWeb, iOS, Android

    57.2

    score / 100

    Why switch from StarUML

    Browser-based UML with real-time collaboration for teams.

    Pros

    • Real-time collaboration with comments and revision history
    • Data linking, org chart imports and conditional formatting
    • Integrations with Google, Microsoft and Atlassian tools
    • Large template and shape library

    Cons

    • Free plan is too limited for regular use
    • Per-user pricing adds up for big teams
    • Large diagrams can feel sluggish in the browser
    Visit Lucidchart Details and reviews
    How this score is calculated
    Editorial fit ×0.369
    Reviews ×0.363
    Clicks (90 days) ×0.150
    Freshness ×0.1585
    Votes ×0.150

    0 counted reviews, 0 up and 0 down votes. Full formula

    Is Lucidchart a good StarUML alternative?

    Verified facts

    4 of 4 verified
    Education accounts
    Free for eligible educators and students
    Checked Oct 25, 2026lucidchart.com(opens source in a new tab)
    Data linking
    Google Sheets, Excel and CSV
    Checked Oct 25, 2026lucidchart.com(opens source in a new tab)
    Diagram as code
    Mermaid
    Checked Oct 25, 2026lucidchart.com(opens source in a new tab)
    Compliance
    SOC 2, PCI, FedRAMP Moderate
    Checked Oct 25, 2026lucidchart.com(opens source in a new tab)

The best StarUML alternative for…

The highest-ranked app in this list for each need.

Visual Paradigm logo

Best StarUML alternative for most people

Visual Paradigm

Heavier suite with team repositories and round-trip engineering.

Gaphor logo

Best StarUML alternative for a free option

Gaphor

Free, open-source UML and SysML modeller.

Lucidchart logo

Best StarUML alternative for a free plan you can upgrade

Lucidchart

Browser-based UML with real-time collaboration for teams.

PlantUML logo

Best StarUML alternative for open source

PlantUML

Write UML as text and keep it in the repo, for free.

PlantUML logo

Best StarUML alternative for self-hosting

PlantUML

Write UML as text and keep it in the repo, for free.

Visual Paradigm logo

Best StarUML alternative for Mac

Visual Paradigm

Heavier suite with team repositories and round-trip engineering.

Visual Paradigm logo

Best StarUML alternative for Windows

Visual Paradigm

Heavier suite with team repositories and round-trip engineering.

Visual Paradigm logo

Best StarUML alternative for Linux

Visual Paradigm

Heavier suite with team repositories and round-trip engineering.

Lucidchart logo

Best StarUML alternative for iPhone and Android

Lucidchart

Browser-based UML with real-time collaboration for teams.

Visual Paradigm logo

Best StarUML alternative for working in the browser

Visual Paradigm

Heavier suite with team repositories and round-trip engineering.

StarUML alternatives: common questions

What is the best alternative to StarUML?

Visual Paradigm ranks first right now. Heavier suite with team repositories and round-trip engineering. Gaphor and PlantUML follow it in our ranking.

Is there a free alternative to StarUML?

Yes. Visual Paradigm (free plan + paid), Gaphor (open source), PlantUML (open source) and Lucidchart (free plan + paid) have a free option. Check each app's verified facts for current plan limits.

Is there an open-source alternative to StarUML?

Yes: Gaphor and PlantUML. PlantUML can also be self-hosted.

Which StarUML alternatives work on Linux?

Visual Paradigm, Gaphor and PlantUML run on Linux.

Why do people switch from StarUML?

The complaints we hear most: no real-time collaboration; licence is per device; smaller user community than older modellers.

How is this list ranked?

Every app is scored with the same published formula: how directly it replaces StarUML, reviews (weighted by verification), visits from AppBreakup, how recently its facts were checked against its own website, and reader votes.