Creating a safer, greener, more secure future.

New Binary Evaluations on TI Processors

Experience the future of automotive technology

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SAFERTOS® Is Optimised For The AURIX™ TriCore™

SAFERTOS® for Infineon

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New Video Series

Let us walk you through upgrading from FreeRTOS to SAFERTOS®

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For systems that need to consider safety, but don’t require certification.

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Truly Independent RTOS Vendor

As an independent RTOS vendor we are able to partner closely with all silicon vendors, giving you a highly optimised product whichever processor you choose.

Supported Processors

SAFERTOS® for Medical

Designed to support the development and certification of medical devices.

IEC 62304 Class C, FDA 510(k) Class III

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SAFERTOS® for Industrial Devices

Pre-emptive scheduling for IEC 61508 SIL 3, available pre-certified by TÜV SÜD.

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Secure RTOS for Safety Critical Applications

WITTENSTEIN high integrity systems: experts in embedded RTOS and Middleware technology with a specialisation in safety certified software. Supplying advanced RTOS and Middleware components across a broad range of market sectors and applications, from basic embedded designs, up to complex safety systems demanding the highest levels of certification. Contact us today.


Highly deterministic and reliable pre-certified safety RTOS, for systems requiring certification; Supports IEC 61508, IEC 62304, FDA 510K and more.


SAFERTOS® CORE is the new RTOS for embedded systems that need to consider safety, but don’t require safety certification.

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Enhanced Security Module

For the highest security-critical environments, WHIS offers the Enhanced Security Module (ESM) to reinforce and strengthen the existing security of our RTOS.

OPENRTOS®: Licensing, Support, and Services for FreeRTOS

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

AWS Advanced Partner


SAFE<strong>RTOS</strong><sup>®</sup> Plugins


Add greater safety and security to your SAFERTOS® applications with these safety plugins, supplied with a certification pack to IEC 61508.


Securely share safety critical data between processors and cores across black channel communication buses.


Guards against corruption and malicious attack by confirming the correctness of your program memory.


A sophisticated task monitor that ensures the scheduling of tasks is occurring as intended.


Responsive, feature rich commercial grade Middleware solutions available tightly integrated with our RTOS products.


Responsive, compact and robust networking stack specifically designed for use with our RTOS products.


WHIS IoT solutions utilise Amazon FreeRTOS IoT software components, integrated with our renowned RTOS, OPENRTOS® or SAFERTOS®.

<strong>RTOS</strong> Specialists

RTOS Specialists

WITTENSTEIN high integrity systems use an ISO 9001:2015 Quality Management System, certified by Lloyds Register LRQA UK applicable to:

Design, development, installation and support of high integrity systems and software for medical aviation and industrial applications.


Our team of development engineers are here to help resolve any questions you might have about our products. First year support included free as standard.


Become a competent and informed user of our RTOS and middleware components by attending one of our training courses.


Benefit from our knowledge and experience to help optimise designs, improve your design processes and achieve certification faster.

Our Partners

Below are some of our partners. View our partners page to see the full list.

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Renesas Platinum partner
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