Free
Free
Homepage states Protégé is free and open source with downloads for desktop and WebProtégé.
- Access
- Homepage states Protégé is free and open source with downloads for desktop and WebProtégé.
Protégé
● Identity checkedResearch · Vendor site 2026-10-04
Protégé is a free, open-source OWL ontology editor from Stanford used to build and maintain formal knowledge models. The site offers Protégé Desktop for local editing and WebProtégé for collaborative browser-based ontology work, with community support and plug-in extensions.
- Category
- Research
- Free access
- Homepage states Protégé is free and open source with downloads for desktop and WebProtégé.
- API access
- Not confirmed
Is Protégé right for you?
A good fit for
Researchers, biomedical teams, and ontology engineers modeling OWL 2 knowledge bases who need a mature editor ecosystem.
Before you choose
Desktop and web clients require local or hosted infrastructure for large ontologies; short courses and support are separate offerings.
Open ontology editing
Protégé provides desktop and web tooling for OWL ontology development, reasoning, and community-driven extensions used in biomedical and government knowledge projects.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| OWL support | Site advertises full support for the OWL 2 Web Ontology Language. | Facts sourced | 2026-10-04 |
| Editions | Homepage lists Protégé Desktop and WebProtégé for collaborative editing. | Facts sourced | 2026-10-04 |
Understand the total cost
Protégé pricing & plans
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Explore toolThe practical questions
Frequently asked questions
What is Protégé used for?
Protégé is a free, open-source OWL ontology editor from Stanford used to build and maintain formal knowledge models. The site offers Protégé Desktop for local editing and WebProtégé for collaborative browser-based ontology work, with community support and plug-in extensions.
Does Protégé have a free plan?
Homepage states Protégé is free and open source with downloads for desktop and WebProtégé.. This record lists ongoing free access; check the plan limits before starting.
How much does Protégé cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use Protégé through an API?
Not confirmed. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Desktop and web clients require local or hosted infrastructure for large ontologies; short courses and support are separate offerings.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.