# Is SafeRTOS suitable for SIL4 certification?

**URL:** <https://forums.freertos.org/t/is-safertos-suitable-for-sil4-certification/13759>\
**Category:** Kernel\
**Created:** [October 27, 2021, 10:10am UTC](https://forums.freertos.org/t/is-safertos-suitable-for-sil4-certification/13759 "2021-10-27T10:10:57Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![cevdetcvr](https://avatars.discourse-cdn.com/v4/letter/c/858c86/32.png) [@cevdetcvr](https://forums.freertos.org/u/cevdetcvr)\
**Post date:** [October 27, 2021, 10:10am UTC](https://forums.freertos.org/t/is-safertos-suitable-for-sil4-certification/13759/1 "2021-10-27T10:10:58Z")

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Is SafeRtos suitable for the SIL4 certification process?

I came across the following statement on FreeRTOS’s site;  
**"SAFERTOS is based on the functional model of the FreeRTOS kernel, however, it is not the FreeRTOS kernel. It has been completely re-designed by a team of functional safety experts at WHIS. Their engineers took the FreeRTOS kernel functional model, subjected it to a full HAZOP, and generated a set of safety requirements. The resulting functional and safety requirements sets were put through an IEC 61508-3 SIL 3 development life cycle, creating the SAFERTOS code base and DAP."**

Is it not possible to use SafeRTOS in a project that we want to get SIL4 certificate?

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**Author:** ![rtel](https://d3iykfbgfh8zhg.cloudfront.net/user_avatar/forums.freertos.org/rtel/32/31_2.png) [@rtel](https://forums.freertos.org/u/rtel)\
**Post date:** [October 27, 2021, 2:58pm UTC](https://forums.freertos.org/t/is-safertos-suitable-for-sil4-certification/13759/2 "2021-10-27T14:58:40Z")

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Hi - not really a question for this forum - I suggest contacting WHIS directly. You can email sales AT highintegritysystems DOT com.