The Janus platform is moving up to the version 2.x. This version supports the SARL agent programming language. You are invited to use this new version.

Welcome on the Janus Website

Janus is an open-source multi-agent platform fully implemented in Java 1.6. Janus enables developers to quickly create web, enterprise and desktop multiagent-based applications. It provides a comprehensive set of features to develop, run, display and monitor multiagent-based applications. Janus-based applications can be distributed across a network. Janus could be used as an agent-oriented platform, an organizational platform, and/or an holonic platform. Indeed Janus is built upon the CRIO organizational metamodel in which the concepts of role and organization are first-class entities. It also natively manages the concept of recursive agents and holons.

Janus is free for non-commercial use and distributed under the terms of the GPLv3.

Janus is jointly developed by the multiagent teams of the Laboratoire Systèmes et Transports and the Grupo de Investigación en Tecnologías Informáticas Avanzadas de Tucumán.

  • Software Companies

The Janus Team is fully at your disposal to help you accomplish your project.

  • Academics

Janus demo set offers a good support for your laboratory works and applying the multiagent concepts introduced in your lessons. Janus also offers a robust set of tools to help your students develop their academic skills.

Download Janus

License of Janus


Janus v2.0 and SARL

A new version of Janus is now available at

Janus was entirely rewritten to support the execution of the new agent-oriented programming language SARL. It is easier and faster.

Please visit for additional information.

Janus Key Principles

The software-engineering principles adopted for developing Janus

  1. Rigor
  2. Separation of concerns
  3. Abstraction
  4. Generality
  5. Incremental Design and Development
  6. DRY - Code Reuse
  7. Design Patterns
  8. Portability
  9. Modularity
  10. Interoperability
  11. Complex systems (Recursivity/Multi-level)
  12. Robustness
  13. Concurrency
  14. Anticipation of change

Janus features

Agent-oriented Programming Interface
Holonic systems - recursive agent
CRIO organizational metamodel, organizations as patterns and dynamic change of roles
Agent-external world communication (GUI, Database, etc.)
Agent-to-agent communication
Role-to-role organizational-based communication
Intra-agent, agent-to-role, and role-to-agent event-based communications
Network peer-to-peer communication (JXTA)
Agent observation toolkit
Service-oriented agent architecture
Predefined mental states of agents
Customizable agent execution model
Custom scheduling models and policies
Platform independent: Linux, Unix, Windows, MacOS, Android
OSGi support (Felix and Equinox)
Maven support
Unit test
Multi-agent based simulation (MABS)

Major Links


  • 2016-01-24SARL 0.3.1 and Janus are available.
  • 2015-11-30SARL 0.3.0 and Janus are available.
  • 2015-04-09SARL 0.2.0 and Janus are available.
  • 2014-10-16SARL agent-programming language, version 0.1.0 is available on
  • 2014-03-01SARL agent-programming language, version 0.1-beta is available on
  • 2013-10-24Janus 1.0 is released, changes.
  • 2013-07-02Configuration is now available for Eclipse Kepler.
  • 2013-05-30Janus source code is now on
  • 2013-05-24Janus 0.6 is released, changes.
  • 2013-03-26New laboratory works are available on the page dedicated to the teaching documents.
  • 2012-08-24Tutorials are completed according to release 0.5.
  • 2012-08-15Janus 0.5 is released. New development version is 1.0-SNAPSHOT.
  • 2012-05-30The official release of version 0.5 is delayed until July, the 15th, due to problems with the network API of Janus from the now-dead project JXTA.
  • 2012-04-30Internet service is up again after 5 days of broken service.
  • 2012-02-17Specifications of the Janus Metamodel are published.
  • 2012-01-31Roadmap of Janus is public.
  • 2011-10-30Preference file for Eclipse Indigo IDE (Conventions)
  • 2011-10-05Updated FAQ
  • 2011-09-28New page dedicated to teaching activities. You're welcome to contribute.
  • 2011-03-03Release of Janus 0.4: download, changes.
  • 2011-02-15Janus is distributed under the GPLv3 license.
2016-01-24SARL 0.3.1 and Janus are available.
2015-11-30SARL 0.3.0 and Janus are available.
This page was last modified on 24 January 2016, at 00:02. This page has been accessed 233,440 times.
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