Protégé，又常常简单地拼写为"Protege"，是一个史丹佛大学开发的本体编辑和知识获取软件。
开发语言采用Java，属于开放源码软件。由于其优秀的设计和众多的插件，Protégé已成为目前使用最广泛的本体论编辑器之一。
Protege 4.2 Beta Changelog
1. improves the interface for the Active Ontology tab to be more readable.
2. Launching the Protege application now opens an empty ontology instead of a welcome screen, to be standard with popular applications.
3. Support has been for Java code generation.
4. Protege no longer requires administrative privileges to run on Windows machines
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