Critical Software's Karvel On-Board Platform Reaches TRL-9 After ATHENE-1 Flight

Critical Software said its Karvel on-board software platform reached Technology Readiness Level 9, the highest level on the technology readiness scale, after flying aboard the ATHENE-1 satellite in low Earth orbit. The Coimbra-based company announced the milestone on November 12, 2026, according to EuropaWire.

Karvel's Flight On ATHENE-1

Critical Software said Karvel was demonstrated in its final form in a real mission environment on ATHENE-1, a small satellite in low Earth orbit that serves as the main mission of the SeRANIS research programme led by the University of the Bundeswehr Munich. On the satellite, Karvel operates across multiple on-board systems, giving spacecraft teams evidence that the platform works in space and not only in test conditions.

The company said this matters in an environment defined by radiation exposure, stringent timing constraints and limited opportunities for intervention once a spacecraft is in orbit. Critical Software said lower readiness levels can show that software performs in testing, while TRL-9 shows that it performs when mission conditions are real.

Karvel is a modular on-board software platform and software development kit designed to help spacecraft teams build, verify and qualify mission software without starting each programme from the beginning. The platform combines hardware and operating system abstraction layers, pre-validated components aligned with space standards including CCSDS and ECSS, and an SDK that supports development, simulation and verification. Karvel supports operating systems including RTEMS, VxWorks, FreeRTOS, MOSA.ic, Zephyr and Linux.

Critical Software positions Karvel as a faster, lower-risk route to mission-ready on-board software for civil, defence and commercial spacecraft developers. Teams interested in the platform can request a technical demo. The company said Karvel draws on its space heritage, which dates back to 1998 when NASA became its first client, and that it has contributed to more than 30 space programmes across institutional, defence and commercial missions since then.

Critical Software's Recent Deal Activity

Critical Software's space work sits alongside other recent moves recorded by akta.pro company records. In March 2026 the company acquired Pittsburgh-based IQ Inc. for undisclosed terms, its largest expansion into the U.S. market, adding capabilities across healthcare, medical devices, mobility, energy, robotics, aerospace and defense. In February 2026 it launched Stadler Digital Labs, a joint venture with Stadler to deliver safety-critical digital engineering and cybersecurity for the global rail market. In January 2026 it established the Critical FlyTech joint venture with Airbus, which holds 51% and Critical Software 49%, headquartered in Coimbra to develop embedded software and services for aerospace applications including avionics, cabin systems and connectivity. The same records list 1,448 employees as of December 31, 2025.