Protégé Alternatives

Protégé is described as 'Free, open source ontology editor and knowledge-base framework' and is an app in the office & productivity category. There are more than 10 alternatives to Protégé for a variety of platforms, including Web-based, Windows, Mac, Linux and iPad apps. The best Protégé alternative is yEd Graph Editor, which is free. Other great apps like Protégé are TheBrain, quiver diagram editor, Visual Understanding Environment and Fluent Editor.

More about Protégé

Protégé alternatives page was last updated Oct 14, 2025

yEd Graph Editor
440 likes
yEd is a powerful diagram editor that can be used to quickly create diagrams manually or import external data for analysis and auto-magically arrange even large data sets by just pressing a button. You can use yEd to quickly create flow charts, BPMN and UML diagrams...
117 yEd Graph Editor alternatives
Cost / License
Free
Proprietary
Application types
Diagram Editor
Mind Mapping Tool
Origin
Germany
EU
Platforms
Mac
Windows
Linux
Online
BSD
+2
Is yEd Graph Editor a good alternative to Protégé?

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1comment
Comments about yEd Graph Editor as an Alternative to Protégé

andrzila
Negative commentOct 14, 2025
0
yEd is not a suitable alternative to Protégé because yEd is a general-purpose diagramming tool, while Protégé is an ontology editor designed for building and managing knowledge bases. Key differences include their core purpose, feature sets (yEd has automatic layout but lacks semantic features, while Protégé focuses on logical structure and knowledge representation), and underlying architecture (yEd is a free but non-open-source Java application, while Protégé is an open-source platform).
This alternative is disputed. yEd Graph Editor is a legitimate Protégé alternative, but it might have issues that some users think are important.
yEd Graph Editor is the most popular Web-based, Windows, Mac & Linux alternative to Protégé.
yEd Graph Editor is the most popular free alternative to Protégé.
yEd Graph Editor is Free and ProprietaryProtégé is Free and Open Source
TheBrain
140 likes
TheBrain helps you organize all your Web pages, contacts, documents, emails and files in a context-driven visual map.
125 TheBrain alternatives
Cost / License
Freemium (Pay once or Subscription)
Proprietary
Application types
Mind Mapping Tool
Team Collaboration Tool
Origin
United States
Platforms
Mac
Windows
Online
Android
iPhone
Android Tablet
iPad
+2
Is TheBrain a good alternative to Protégé?
TheBrain is the most popular Android, iPhone, iPad & Android Tablet alternative to Protégé.
TheBrain is Freemium and ProprietaryProtégé is Free and Open Source
quiver diagram editor
9 likes
Efficient web-based tool for constructing high-quality commutative diagrams. Offers LaTeX export with embedded links, intuitive interface supporting both mouse and keyboard inputs, and features like multiple selections, macro support, and smart label alignment.
Cost / License
Free
Open Source
Application type
Diagram Editor
Origin
United Kingdom
Platforms
Online
+6
Is this a good alternative to Protégé?

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1comment
Comments about quiver diagram editor as an Alternative to Protégé

andrzila
Negative commentOct 14, 2025
0
diagramming is not enouth for ontologies
quiver diagram editor is the most popular Open Source alternative to Protégé.
quiver diagram editor is Free and Open SourceProtégé is also Free and Open Source
quiver diagram editor is Privacy focusedProtégé is not according to our users
Visual Understanding Environment
85 likes
Visual Understanding Environment (VUE) is a mind-mapping and concept-mapping tool. It is also a non-linear presentation program.
85 Visual Understanding Environment alternatives
Cost / License
Free
Open Source
Application type
Mind Mapping Tool
Origin
United States
Alerts
Discontinued
Platforms
Mac
Windows
Linux
+1
Is this a good alternative to Protégé?
Fluent Editor
2 likes
An ontology editor focused on providing a seamless experience for users working with OWL ontologies. It supports the editing of structured ontologies and offers various validation and reasoning tools.
Cost / License
Free Personal
Proprietary
Origin
Poland
EU
Platforms
Windows
+1
Is Fluent Editor a good alternative to Protégé?
Onto4ALL
1 like
Onto4ALL Is a free graphical editor capable of creating, editing and exporting ontologies being guided by an warnings console, an ontological building rules tab and an extensive palette of ontological classes and relationships.
Cost / License
Free
Open Source
Origin
Brazil
Platforms
Online
+3
Is Onto4ALL a good alternative to Protégé?
CmapTools
48 likes
concept maps on servers, edit their maps synchronously (at the same time) with other users on the Internet, and search the web for information relevant to a concept map.
44 CmapTools alternatives
Cost / License
Free
Proprietary
Application type
Mind Mapping Tool
Platforms
Mac
Windows
Linux
iPad
Is CmapTools a good alternative to Protégé?
Datagraphs
1 like
Knowledge graphs.
Cost / License
Subscription
Proprietary
Platforms
Online
Is Datagraphs a good alternative to Protégé?
Datagraphs is the most popular commercial alternative to Protégé.
Datagraphs is Paid and ProprietaryProtégé is Free and Open Source
3D Topicscape
7 likes
3D Topicscape is a Personal Information Manager that provides a template loosely based on mind-mapping or concept mapping. It presents the mind map as a 3D scene where each node is a cone (or pyramid, or variation on such a shape). It can also display in a 2D format.
Cost / License
Freemium
Proprietary
Application type
Mind Mapping Tool
Origin
United Kingdom
Platforms
Windows
Is 3D Topicscape a good alternative to Protégé?
Unilexicon
2 likes
Unilexicon™ a visual editor and taxonomy manager for authoring controlled vocabularies with a content tagging extension.
Cost / License
Free
Open Source
Platforms
Online
Is Unilexicon a good alternative to Protégé?