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Gaphor alternatives: 4 apps ranked by verified data

Facts checked Oct 25, 2026AppBreakup editorialHow we rank

Common reasons people leave Gaphor: fewer features than commercial modellers, and no team repository or real-time collaboration. We ranked 4 alternatives by how directly each one replaces Gaphor, then by reviews, real visits and how recently each app's facts were checked against its own website. StarUML currently ranks first.

Quick comparison

#AppPricingOpen sourcePlatformsVerified factsScore
1PlantUML logoPlantUMLOpen sourceYesWeb, Windows, macOS +24 of 459.6
2Archi logoArchiOpen sourceYesWindows, macOS, Linux4 of 457.2
  1. PlantUML logo

    1. PlantUMLTop pick

    Best for: Engineers documenting software with UML diagrams kept as text in the repo

    Open sourceSelf-hostableWeb, Windows, macOS, Linux, Self-hosted

    59.6

    score / 100

    Why switch from Gaphor

    Free UML written as text, easy to keep in the repository.

    Pros

    • Very broad UML coverage
    • Plugins for most IDEs and documentation tools
    • Can be self-hosted as a rendering server
    • Free and open source

    Cons

    • Default visual style looks dated
    • Local use needs Java installed
    • Syntax has many inconsistencies between diagram types
    Visit PlantUML Details and reviews
    How this score is calculated
    Editorial fit ×0.377
    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 PlantUML a good Gaphor alternative?

    Verified facts

    4 of 4 verified
    Open source
    Yes
    Checked Oct 25, 2026plantuml.com(opens source in a new tab)
    License
    LGPL-3.0 (repo); GPL and other builds offered
    Checked Oct 25, 2026github.com(opens source in a new tab)
    Licensing options
    Several licences, GPL build is most complete
    Checked Oct 25, 2026plantuml.com(opens source in a new tab)
    In-browser rendering
    JavaScript rendering engine
    Checked Oct 25, 2026plantuml.com(opens source in a new tab)
  2. Archi logo

    2. Archi

    Best for: Enterprise architects and students working in ArchiMate on a budget

    Open sourceWindows, macOS, Linux

    57.2

    score / 100

    Why switch from Gaphor

    Open-source modelling for ArchiMate enterprise architecture instead of UML.

    Pros

    • Free and open source
    • Validates ArchiMate relationships as you model
    • Runs on Windows, macOS and Linux
    • Scripting and Git collaboration plug-ins

    Cons

    • Supports ArchiMate only
    • No built-in multi-user repository
    • Eclipse-based interface feels heavy
    Visit Archi 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 Archi a good Gaphor alternative?

    Verified facts

    4 of 4 verified
    Open source
    Yes
    Checked Oct 25, 2026archimatetool.com(opens source in a new tab)
    License
    MIT
    Checked Oct 25, 2026github.com(opens source in a new tab)
    Platforms
    Windows, macOS, Linux
    Checked Oct 25, 2026archimatetool.com(opens source in a new tab)
    macOS requirement
    macOS 11 or later
    Checked Oct 25, 2026archimatetool.com(opens source in a new tab)

The best Gaphor alternative for…

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

St

Best Gaphor alternative for most people

StarUML

A more polished UML tool for a one-time fee.

PlantUML logo

Best Gaphor alternative for a free option

PlantUML

Free UML written as text, easy to keep in the repository.

Visual Paradigm logo

Best Gaphor alternative for a free plan you can upgrade

Visual Paradigm

Full commercial suite with code engineering and team features.

Archi logo

Best Gaphor alternative for open source

Archi

Open-source modelling for ArchiMate enterprise architecture instead of UML.

PlantUML logo

Best Gaphor alternative for self-hosting

PlantUML

Free UML written as text, easy to keep in the repository.

St

Best Gaphor alternative for Mac

StarUML

A more polished UML tool for a one-time fee.

St

Best Gaphor alternative for Windows

StarUML

A more polished UML tool for a one-time fee.

St

Best Gaphor alternative for Linux

StarUML

A more polished UML tool for a one-time fee.

Visual Paradigm logo

Best Gaphor alternative for working in the browser

Visual Paradigm

Full commercial suite with code engineering and team features.

Gaphor alternatives: common questions

What is the best alternative to Gaphor?

StarUML ranks first right now. A more polished UML tool for a one-time fee. Visual Paradigm and PlantUML follow it in our ranking.

Is there a free alternative to Gaphor?

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

Is there an open-source alternative to Gaphor?

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

Which Gaphor alternatives work on Linux?

StarUML, Visual Paradigm, PlantUML and Archi run on Linux.

Why do people switch from Gaphor?

The complaints we hear most: fewer features than commercial modellers; no team repository or real-time collaboration; small community.

How is this list ranked?

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