PX5 RTOS
px5rtos.com
What it is
PX5 RTOS is a hard real-time operating system for resource-constrained embedded applications, with a native POSIX pthreads API. It is presented for safety-critical work in automotive, industrial, medical, rail, and other demanding settings. The maker says a minimal setup on typical 32-bit microcontrollers can use as little as 1KB of flash and 1KB of RAM. At 80MHz, most API calls and context switches are stated to take less than one microsecond; processing is described as predictable and independent of the number of active threads. Stated certifications include IEC 61508 SIL 4, IEC 62304 Class C, ISO 26262 ASIL D, and EN 50128 SW-SIL 4. Run-time checks cover function pointers, system objects, buffers, and stacks. Supported architectures include Arm Cortex-M, Cortex-R and Cortex-A, RISC-V, Renesas RX, AMD MicroBlaze, and Infineon TriCore. Listed tools include IAR, Eclipse/GCC, Arm DS, and Arm Keil. Pricing is on request; listed packages start at 5000.00 USD as a one-time fee or $5,000 a year for a subscription. Free evaluation kits are available with a free PX5 Community login.
Spec sheet
- Purpose
- PX5 RTOS is a hard real-time operating system for resource-constrained embedded applications, with a native POSIX pthreads API.Read 4 Oct 2026 · px5rtos.com
- Intended users
- The maker presents PX5 RTOS for safety-critical automotive, industrial, medical, rail, and other demanding embedded applications.Read 4 Oct 2026 · px5rtos.com
- Integrations
- The integration page lists TensorFlow Lite Micro, Microsoft Azure, Amazon AWS, lwIP, Mbed TLS, NetX Duo, and OpenAMP integrations or examples.Read 4 Oct 2026 · px5rtos.com
- Security
- The RTOS includes pointer/data verification technology for run-time function pointer, system object, buffer, and stack verification.Read 4 Oct 2026 · px5rtos.com
- Support
- The published support SLA lists response times under one working day for critical and serious issues, and under two working days for moderate and cosmetic issues.Read 4 Oct 2026 · px5rtos.com
- Determinism
- The maker says API and context-switch processing is predictable and does not depend on the number of active threads.Read 4 Oct 2026 · px5rtos.com
- Developer tools
- The maker lists support for IAR, Eclipse/GCC, Arm DS, and Arm Keil tools.Read 4 Oct 2026 · px5rtos.com
- Evaluation downloads
- Free evaluation kits are available for processors and platforms from AMD Xilinx, GigaDevice, Infineon, Microchip, NXP, Renesas, SiFive, Silicon Labs, STMicroelectronics, and Texas Instruments; a free PX5 Community login is required.Read 4 Oct 2026 · px5rtos.com
- Footprint
- The maker says minimal use can require as little as 1KB of flash and 1KB of RAM on typical 32-bit microcontrollers.Read 4 Oct 2026 · px5rtos.com
- Hardware support
- Listed processor architectures include Arm Cortex-M, Cortex-R and Cortex-A, RISC-V, Renesas RX, AMD MicroBlaze, and Infineon TriCore.Read 4 Oct 2026 · px5rtos.com
- Performance
- On typical 32-bit microcontrollers running at 80MHz, most API calls and context switches complete in less than one microsecond.Read 4 Oct 2026 · px5rtos.com
- Safety certifications
- PX5 RTOS is stated to be certified to IEC 61508 SIL 4, IEC 62304 Class C, ISO 26262 ASIL D, and EN 50128 SW-SIL 4.Read 4 Oct 2026 · px5rtos.com
- Security support
- The support team says it proactively notifies customers about newly identified CVEs and provides exposure guidance and known workarounds when a resolution is unavailable.Read 4 Oct 2026 · px5rtos.com
- Testing
- The maker says it tests the entire RTOS code base with complete C statement and branch decision coverage for every release.Read 4 Oct 2026 · px5rtos.com
Plans and prices
Device/Product Licensing $5,000, paid once One-time fee; packages start as low as $5K. Perpetual license · Full source code · No royalties · Professional support Read 4 Oct 2026 · px5rtos.com
Enterprise, SoC, Semiconductor, and Custom Licensing $5,000, paid once One-time fee; packages start as low as $5K; custom licensing is available. Perpetual license · Full source code · No royalties · Professional support · Options for sub-licensing Read 4 Oct 2026 · px5rtos.com
Subscription Licensing $5,000 a year Annual fee; packages start as low as $5K. Full source code · No royalties · Professional support Read 4 Oct 2026 · px5rtos.com
Strong points and limits
Strong points
- Native POSIX pthreads API.
- Minimal configuration can use 1KB flash and RAM.
- Predictable processing independent of active thread count.
- Stated certifications include IEC 61508 SIL 4.
- Free evaluation kits are available with a Community login.
Limits
- Pricing is on request.
- Listed licensing packages start at 5000.00 USD.
- Evaluation kits require a free PX5 Community login.
Who it suits
PX5 RTOS is for developers building resource-constrained embedded systems, particularly in safety-critical automotive, industrial, medical, or rail applications. Its architecture and tool lists indicate support for a range of processor families and development environments.
Verdict
PX5 RTOS pairs a small stated footprint and predictable real-time behavior with certifications and run-time verification. Licensing packages start at 5000.00 USD, while exact pricing is available on request.
Where Specifiction places it
- IoT Operating Systems#6 of 147.5