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description=Embedded software developers choose PX5 RTOS, the faster real-time OS alternative to ThreadX & embedded Linux. Native pthreads API.;

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px5 best rtos for embedded software developers solutions px5 rtos px5 net px5 file px5 usb px5 modules download px5 rtos middleware integrations consulting advanced 5th generation rtos less than 1kb minimal usage sub microsecond context switching api calls unique pointer data verification pdv technology installs in 3 easy steps taking just minutes native implementation of posix pthreads api functional safety certified to iec 61508 sil 4 iec 62304 class c iso 26262 asil d en 50128 sw sil 4 advanced 5th generation rtos less than 1kb minimal usage sub microsecond context switching api calls unique pointer data verification pdv technology installs in 3 easy steps taking just minutes native implementation of posix pthreads api functional safety certified to iec 61508 sil 4 iec 62304 class c iso 26262 asil d en 50128 sw sil 4 advanced tcp ip networking ipv4 and ipv6 support less than 6kb for minimal usage zero copy transmission reception advanced safety and security measure easy to install and use native implementation of bsd sockets api advanced embedded fat file system less than 6kb for minimum usage unparalleled performance logical sector fat directory search cache fault tolerant support fat 12 16 32 exfat 8 3 and lfn support px5 flash wear leveling native industry standard api functional safety certified to iec 61508 sil 4 iec 62304 class c iso 26262 asil d en 50128 sw sil 4 advanced usb stack solution usb 2 0 host and device stack minimal 10kb host footprint minimal 5kb device footprint host classes audio hid hub mass storage cdc acm cdc ecm device classes audio hid hub mass storage cdc acm cdc ecm separately build application modules lightweight written in standard c run time download or execute in place position independent and fixed address support every module has a separate address space full memory protection during execution mpu mmu time domain protection via priority maximum partners cloud providers semiconductor embedded software consultants supports leading cloud semiconductor and tool providers about our mission blog press events newsletter contact we are dedicated to enhancing your development team of industry experts professional support you are not alone advanced technology focus on simplicity and ease of use bringing posix pthreads api to constrained devices log in sign up contact support best rtos for embedded developers px5 rtos is certified for safety critical systems in automotive industrial medical and more discover px5 rtos enhance simplify unite enhance discover one of the smallest fastest certified safe and secure real time operating systems supports a broad range of microprocessors and tools share applications across platforms and protect your investment simplify install in three easy steps in minutes designed for simplicity native implementation of the industry standard posix pthreads api start building your embedded application quickly unite embedded linux is too memory and processing intensive for resource constrained devices px5 rtos is the best posix pthreads rtos for hard real time embedded applications pthreads united linux embedded linux embedded devices industrial grade rtos advanced fifth generation real time operating system and the best rtos for the most demanding embedded applications ultrahigh performance sub microsecond context switching and api calls on most microprocessors and rich determinism ultrasmall size less than 1kb for minimal use for use in the most memory constrained devices safe and secure a certified safe and secure rtos with patent pending pointer data verification pdv technology extensive testing 100 statement and branch decision coverage certified to the highest levels of the iec 61508 functional safety standard iec 61508 sil 4 iec 62304 class c iso 26262 asil d and en 50128 sw sil 4 simple to use install and use in minutes with a native implementation of the posix pthreads standard your team can focus on developing your application best rtos for developers built for simplicity with just two source files px5 c and px5_binding s installing and using the best rtos takes only three quick steps 1 place the px5 rtos distribution px5 c px5_binding s and header files into your c main project source directory 2 add px5 c and px5_binding s to your project ide or makefile no complicated project or linker control file changes 3 modify your c main program to include pthread h and call px5_pthread_start in your main program px5 rtos upconverts your main program to your first thread you are ready to go fastest rtos on typical 32 bit microcontrollers running at 80mhz most api calls and context switches complete in less than one microsecond learn about the fastest rtos deterministic rtos the processing for each api and context switch is completely predictable and unaffected by the number of active threads certified safe px5 rtos px5 file and px5 net are certified by sgs tüv saar for use in applications requiring the highest level of functional safety in accordance with iec 61508 sil 4 iec 62304 class c iso 26262 asil d en 50128 sw sil 4 safety certified rtos safety certified file system safety certified networking you are not alone we deliver professional fully ticketed and tracked support to you px5 enhances simplifies and unites embedded development our professional support helps us deliver on this promise get support you benefit using the best rtos using the best rtos creates business advantages for you faster time to market enhanced product quality safer and more secure products easier functional safety certification cross platform application support reduced engineering training via pthreads api professional support iot rtos develop better quality iot devices faster even for the most demanding applications vendor agnostic system on chip soc rtos industrial automation rtos medical devices rtos consumer electronics rtos automotive rtos office automation rtos networking and communication stacks military and aerospace rtos press release january 20 2026 px5 net earns tüv functional safety certification completing the company s certified embedded software stack px5 announced sgs tüv saar certification of px5 net tcp ip stack joining px5 rtos and px5 file as the only provider of a complete pre certified rtos file system and networking solution px5 enables faster lower risk development of safety critical connected systems in automotive industrial medical and rail trusted proven newsletter sign up email subscribe message sent thank you for subscribing you ll get company news and helpful tips upcoming events and more solutions px5 rtos px5 net px5 file px5 usb px5 modules download px5 rtos middleware integrations consulting fastest rtos what is rtos partners cloud providers semiconductor embedded software consultants about blog press events newsletter careers contact support tech support faq s sales support user guides white papers videos training publications search contact log in sign up survey cookie policy terms privacy copyright px5 rtos inc all rights reserved px5 rtos ai assistant hello i m your ai assistant ask me about px5 rtos its industrial grade design technical advantages and why it s trusted by embedded developers the site uses cookies by continuing to browse px5rtos com you accept cookie placement cookie policy your feedback matters please answer 5 quick questions to help us better meet your needs begin survey what do you like about the px5 rtos continue what do you dislike about the px5 rtos continue what would you like to see the px5 rtos continue what do you like about our website continue how can we improve our website send survey survey completed thank you we sincerely appreciate your valuable input and the time you ve taken to complete a survey close