PX5 Sets New Safety Bar with End-to-End Certified Embedded Software

SAN DIEGO, CA – January 21, 2026 – PX5, a leader in high-performance embedded software, today announced a landmark achievement that sets a new standard for developing safety-critical systems. The company has secured off-the-shelf SGS-TÜV Saar functional safety certification for its PX5 NET embedded TCP/IP stack, completing a trio of certified core products. With its PX5 RTOS, PX5 FILE, and now PX5 NET all certified, PX5 stands as the industry's only real-time operating system (RTOS) provider to offer a complete, end-to-end, pre-certified software foundation.

This milestone is poised to dramatically reshape the development landscape for mission-critical products across the automotive, industrial, medical, and rail sectors. By providing a fully certified software stack, PX5 enables developers to significantly reduce the time, cost, and inherent risks associated with bringing highly reliable and secure systems to market.

A New Benchmark for Trust and Reliability

Achieving functional safety certification is a notoriously rigorous, expensive, and time-consuming process. The certification of PX5 NET, following the PX5 RTOS in 2024 and PX5 FILE in 2025, represents the culmination of a multi-year strategic effort. All three components are now certified by SGS-TÜV Saar, a globally respected independent certification body, to the highest possible levels of the industry’s most stringent functional safety standards.

These certifications include:

• IEC 61508 SIL 4: The highest safety integrity level for industrial control systems.
• ISO 26262 ASIL D: The most stringent level for automotive safety, critical for systems like autonomous driving and advanced driver-assistance systems (ADAS).
• IEC 62304 Class C: The highest classification for medical device software, where failure could result in serious injury or death.
• EN 50128 SW-SIL 4: The top safety integrity level for software in railway control and protection systems.

While other vendors in the competitive RTOS market offer certified individual components, PX5's achievement is unique in its comprehensive scope. The company now provides a single, cohesive, off-the-shelf foundation where the real-time operating system, file system, and networking stack are all pre-certified to these demanding, cross-industry standards. This integrated approach eliminates the dangerous and costly gaps that can arise when developers are forced to piece together certified and uncertified components from various sources, a common challenge in embedded systems design.

Accelerating Development in High-Stakes Industries

The practical implications for engineering teams are profound. In industries where system failure is not an option, a significant portion of any project's budget and schedule is consumed by the certification process. Developers must produce extensive documentation and subject their code to exhaustive testing to prove to regulators that their final product is safe. By building on PX5’s pre-certified foundation, this burden is dramatically lightened.

Consider the development of an automotive ECU for an autonomous driving system. Achieving ISO 26262 ASIL D compliance for the underlying RTOS, file system, and network stack from scratch can take years and cost millions. With the PX5 stack, developers can inherit the safety certification of these foundational components, allowing them to focus their resources on application-specific logic—the algorithms and features that differentiate their product.

This benefit extends across all of PX5's target markets. For a next-generation medical infusion pump, which requires IEC 62304 Class C compliance, using the certified PX5 RTOS, PX5 FILE for data logging, and PX5 NET for secure connectivity to hospital networks allows manufacturers to get life-saving technology into the hands of healthcare providers faster. Similarly, in an Industry 4.0 factory, a robotic controller built on PX5's IEC 61508 SIL 4 certified stack provides a trusted foundation for safe human-robot collaboration.

“Functional safety directly affects system reliability and security, which is why developers need software they can trust,” said William Lamie, CEO of PX5. “With all three of our products now fully TÜV certified, developers can get their safety-critical systems to market more rapidly and with lower risk by leveraging pre-certified components instead of having to certify from scratch.”

A Strategic Play for the Future of Embedded Systems

This end-to-end certification is more than a technical victory; it is a calculated strategic move that positions PX5 as a dominant force in the high-stakes embedded market. The company, founded by Lamie, the original architect of the widely used ThreadX RTOS, leverages deep domain expertise to address the industry's most pressing challenges.

The company’s approach is designed to be developer-centric. The PX5 RTOS features a native POSIX pthreads API, PX5 FILE uses a native Linux-compatible file system API, and PX5 NET offers a native BSD Sockets API. This adherence to well-known industry standards drastically reduces the learning curve and promotes code portability, allowing teams to leverage existing skills and software assets.

Furthermore, PX5’s business model—which includes complete source code access and royalty-free licensing—offers a transparent and cost-effective alternative to the complex licensing schemes common in the industry. This combination of a unique technical offering, developer-friendly APIs, and a straightforward business model creates a compelling value proposition.

As embedded systems grow ever more complex and interconnected, the demand for verifiable safety and security is exploding. The rise of the Industrial IoT, connected vehicles, and smart medical devices means that software reliability is no longer a feature but a fundamental requirement. By providing a complete, pre-certified safety foundation, PX5 is not just selling software components; it is offering confidence and a clear path to innovation for the engineers building the world's most critical devices.