Experts in embedded RTOS, with a specialisation in safety certified software

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WITTENSTEIN high integrity systems

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A New Approach To Embedded Software

OPENRTOS provides a commercial license for Amazon FreeRTOS. This includes a license for the FreeRTOS kernel as well as, if needed, the additional software libraries that make up Amazon FreeRTOS. The FreeRTOS kernel is a highly successful, small, efficient embedded real time operating system. Our unique approach provides the ultimate flexibility for professional software development.


Now released under an MIT license, Amazon FreeRTOS is completely free to download. Updates and ports of the FreeRTOS kernel are simultaneously released by WITTENSTEIN as OPENRTOS, with full commercial support and licensing.

Benefits of OPENRTOS Licensing:

Commercial licensing provides standard commercial protections and support.

  • Removes the a:FreeRTOS MIT conditions;
  • Commercial indemnification including explicit exclusion of open source code;
  • Professional support and warranty.

Peace of mind

An OPENRTOS licence gives peace of mind. WITTENSTEIN high integrity systems takes responsibility for getting the RTOS working with your chosen processor / compiler combination, verifies correct operation, and delivers a working demo project with full source code, ensuring your developers are  working effectively with our products without delay.

Developers benefit from a 12 month warranty that covers maintenance, updates and professional technical support.

To download further information, data sheets, and a quick reference guide, click here.