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RTI is the world’s largest DDS supplier and Connext is the most trusted software framework for critical systems.

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RTI provides a broad range of technical and high-level resources designed to assist in understanding industry applications, the RTI Connext product line and its underlying data-centric technology.


RTI is the infrastructure software company for smart-world systems. The company’s RTI Connext product is the world's leading software framework for intelligent distributed systems.

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RTI Connext DDS 5.3.1

Thank you for your interest in using RTI software for your project.

You can find installation instructions in the Getting Started Guide (PDF). By downloading Connext DDS, you acknowledge that you agree to the RTI Software License Agreement.

An rti_license.dat license file is required in order to use this software. If you do not already have a current license file, you may acquire one in a number of ways:

  • Submit the free trial download form and a license file will be emailed to you. You do not need to install the free trial software. For the Connext 5.3.1 version (required by ROS 2), use the below downloads in lieu of the free trial downloads.
  • Contact your account manager or if you need assistance.


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