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Developer(s)WildFly, a division of Red Hat
Initial release10 September 2014; 7 years ago (2014-09-10)
Stable release
16.1.0 / December 20, 2021 (2021-12-20)
Written inJava
TypeSingle sign-on system
LicenseApache License 2.0

Keycloak is an open source software product to allow single sign-on with Identity and Access Management aimed at modern applications and services. As of March 2018 this WildFly community project is under the stewardship of Red Hat who use it as the upstream project for their RH-SSO product.[1]


The first production release of Keycloak was in September 2014, with development having started about a year earlier. In 2016 Red Hat switched the RH SSO product from being based on the PicketLink framework to being based on the Keycloak upstream Project.[2] This followed a merging of the PicketLink codebase into Keycloak.[3][4]

To some extent Keycloak can now also be considered a replacement of the Red Hat JBoss SSO open source product which was previously superseded by PicketLink.[5][6] As of March 2018 is redirecting the old jbosssso subsite to the Keycloak website. The JBoss name is a registered trademark and Red Hat moved its upstream open source projects names to avoid using JBoss, JBoss AS to Wildfly being a more commonly recognized example.


The features of Keycloak include:


There are 2 main components of Keycloak:

  • Keycloak server
  • Keycloak application adapter

See also[edit]


  1. ^ Marchioni, Francesco; Fugaro, Luigi (31 August 2016). "12". Mastering JBoss Enterprise Application Platform 7. ISBN 978-1786463630. Introduction Red Hat SSO.
  2. ^ Atkisson, Brian (4 October 2016). "How Red Hat re-designed its Single Sign On (SSO) architecture, and why". Red Hat. Archived from the original on 9 January 2018. Retrieved 7 March 2018.
  3. ^ Dawidowicz, Boleslaw (10 March 2015). "PicketLink and Keycloak projects are merging!". Archived from the original on 11 September 2015. Retrieved 7 March 2018.
  4. ^ Peeples, Kenneth (28 May 2014). "What is the difference between Picketlink and Keycloak?". JBossDeveloper. Archived from the original on 5 April 2017. Retrieved 7 March 2018.
  5. ^ "JBosssso (archived) Website". Archived from the original on 30 May 2014.
  6. ^ Kalali, Masoud (30 May 2010). GlassFish Security. PACKT. p. 182. ISBN 978-1-847199-38-6.

External links[edit]