What fentISS does

Fent Innovative Software Solutions, S.L. (fentISS) is a privately held Spanish technology company founded in 2009 in Valencia and led by CEO Manuel Muñoz, with a satellite office opened in Toulouse, France in 2025. The company develops safety-critical embedded virtualization software for space and aerospace, anchored on its XtratuM hypervisor — a bare-metal, space-qualified Type-1 hypervisor that implements time and space partitioning on SPARC, ARM, and RISC-V processors, letting multiple operating systems and applications of different criticality share one on-board computer without interference. The product portfolio around it includes LithOS (a certified real-time guest operating system for XtratuM), SKE (a hardware/software emulator for development and testing), XtratuM Next Generation (XNG) with full ECSS compliance and RISC-V support, and Xoncrete (an ARINC-653 scheduling configuration tool).

FENTISS monetizes primarily through software licensing of XtratuM and its ecosystem to enterprise aerospace customers. Its named customer base spans European space agencies (ESA, CNES, DLR), large prime integrators (Airbus Defence & Space, Thales Alenia Space, Sodern, SENER Aeroespacial, SpaceBel, KARI, Hemeria, CEA IRFU), and satellite operators, with OneWeb's 648-satellite constellation (600+ of FENTISS-deployed) and a 4-year Long-Term Agreement with U-Space (signed November 2025) representing flagship commercial wins. The go-to-market is direct enterprise field sales supplemented by technical publications, conference presence (including Space Tech Expo 2025 in Bremen), and participation in funded R&D consortia such as the CDTI-backed AR2SEC project. Headcount sits at approximately 20 professionals as of mid-2025, and no external funding rounds are disclosed.

Name

fentISS

Legal name

Fent Innovative Software Solutions, S.L.

Website

https://fentiss.com

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

11–50 employees

Short description

FentISS is a Valencia-based, privately held developer of the XtratuM space-qualified real-time hypervisor, providing ECSS-compliant software partitioning for satellite on-board computers used by ESA, CNES, DLR, OneWeb, U-Space, and leading European aerospace primes.

Ownership category

akta.pro rank

Product category

Space-grade Embedded Real-Time Virtualization Software

NAICS

Computer Systems Design and Related Services (54151), Software Publishers (5132)

SIC

Services-Computer Integrated Systems Design (7373), Services-Computer Programming Services (7371)

akta.pro primary industry

Spacecraft Avionics, Flight Computers & Software (IMABACAI)

akta.pro secondary industries

Server Operating Systems & Hypervisors (Virtualization) (HDABADAE), Enterprise PaaS (App Runtime & Managed Application Platforms) (HDAEAKAB)

Keywords

• Space hypervisor software
• Embedded real-time systems
• Satellite virtualization
• Safety-critical software
• On-board computer software

Headquarters

HQ city

Valencia

HQ country

Spain

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

Personnel, Technology or R&D

Revenue model

1. Software Licensing: FENTISS generates revenue through licensing of its XtratuM hypervisor, LithOS real-time operating system, and related software ecosystem. Customers include space agencies, satellite operators, and aerospace companies that license the software for integration into spacecraft and satellite on-board computers.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels8 records

Core offering

FENTISS develops and licenses the XtratuM space-qualified hypervisor and surrounding embedded virtualization software ecosystem (LithOS RTOS, SKE development environment, and Xoncrete scheduling tool) that allow multiple applications of differing criticality levels to share a single on-board computer on satellites and spacecraft without temporal or spatial interference. The technology is sold to space agencies, satellite operators, and aerospace manufacturers for integration into safety-critical real-time embedded systems.

Product overview

FENTISS provides a portfolio of virtualization software solutions for critical embedded systems, primarily serving the space industry. The core product is XtratuM, a space-qualified hypervisor that enables time and space partitioning, supported by LithOS (a certified real-time guest operating system) and SKE (a development environment emulator). XtratuM Next Generation (XNG) represents the evolved version with enhanced capabilities including ECSS compliance and support for RISC-V architectures. The company also offers Xoncrete, a scheduling configuration tool. Together, these products enable multiple applications with different criticality levels to run securely on shared hardware without interfering with one another.

Differentiator

Problem solved

Functional benefit

Products and services

• XtratuM

Quantifiable outcome

• 1,000+ satellites and spacecraft operating with XtratuM and its ecosystem, including 600+ in the OneWeb constellation
• +1 more outcomes

Named customers11 records

Segments1 record

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Six partnerships are on record, tiered core, lead and supporting.

• U-SpacecoreStrategic or Co-development Partner · 1 November 2025U-Space and FENTISS signed a 4-year Long-Term Agreement (LTA) during Space Tech Expo 2025 in Bremen. U-Space will integrate XtratuM Next Generation (XNG) hypervisor and FENTISS' software ecosystem into its system architecture for next-generation satellite constellations. The partnership builds upon prior collaboration on orbit-proven missions including N3SS, PANDORE, and SOAP. FENTISS' operational presence in Toulouse facilitates close technical exchanges and integration support.
• GTD Science Infrastructures & RoboticsleadStrategic or Co-development Partner · 1 January 2024GTD Science Infrastructures & Robotics leads the AR2SEC project (ARquitecturas de alto Rendimiento para SECtores Críticos), a 24-month CDTI-funded initiative researching optimal approaches for processing architectures and microelectronic components for critical sectors. FENTISS participates as a project partner providing low-level software (XtratuM hypervisor and operating systems) to link user applications to the designed hardware.
• TECHNICA ElectronicssupportingStrategic or Co-development Partner · 1 January 2024TECHNICA Electronics is a participant in the AR2SEC project alongside FENTISS and other companies, contributing to the development of processing architectures for critical sectors including automotive, avionics, and robotics.
• Clue TechnologiessupportingStrategic or Co-development Partner · 1 January 2024Clue Technologies participates in the AR2SEC project, collaborating with FENTISS and other partners on the development of high-performance architectures for critical sectors.
• BSC (Barcelona Supercomputing Center)supportingStrategic or Co-development Partner · 1 January 2024BSC (Barcelona Supercomputing Center) supports the AR2SEC project as a research center, contributing expertise alongside FENTISS and industry partners to advance functional safety in software and hardware systems.
• UPM (Polytechnic University of Madrid) Center for Industrial ElectronicssupportingStrategic or Co-development Partner · 1 January 2024UPM's Center for Industrial Electronics supports the AR2SEC project as a research center, collaborating with FENTISS and other partners on processing architectures and microelectronic components for critical sectors.

Scale indicators6 records

Recent moves5 records

Expansion highlights5 records

Direct peers

• SYSGO: SYSGO's PikeOS is a safety-critical separation kernel and hypervisor widely used in avionics, automotive, and space on-board computers. It is the closest direct competitor to XtratuM in the certified-embedded-hypervisor-for-space market.
• AdaCore: AdaCore provides GNAT Pro and SPARK toolchains for safety- and security-critical Ada software development in aerospace, avionics, and space. Adjacent but overlapping competitor for safety-critical embedded software stacks used in satellite on-board computers.
• Lynx Software Technologies: Lynx offers LynxOS-178 and LynxSecure, safety- and security-critical separation kernels/hypervisors targeting avionics, military, and space applications — directly comparable to XtratuM in certified embedded virtualization.
• Green Hills Software: Green Hills' INTEGRITY RTOS and INTEGRITY-178 tuMP are safety-certified real-time operating systems used in DO-178C and ECSS-qualified avionics and space platforms. Direct competitor to FENTISS for flight computer slots.
• DDC-I: DDC-I's Deos is a safety-critical, time- and space-partitioned RTOS used in avionics and space applications. Direct competitor to XtratuM in the safety-critical embedded partitioning segment.
• CoreAVI: CoreAVI provides safety-critical graphics, compute, and hypervisor platforms (e.g., VkCore SC) for avionics and space. Comparable to FENTISS in providing safety-critical, partitioned compute substrates for aerospace customers.

Broad incumbents

• BlackBerry QNX: QNX (BlackBerry) offers safety-certified real-time operating systems and hypervisors primarily for automotive, with growing presence in industrial and aerospace safety-critical markets — adjacent incumbent to FENTISS in safety-critical embedded virtualization.
• Wind River Systems: Wind River's VxWorks is the dominant commercial RTOS in aerospace, defense, and space. While broader than FENTISS' niche, it competes for the same on-board computer software slots across ESA, NASA, and commercial missions.
• Curtiss-Wright Defense Solutions (formerly Cobham): Curtiss-Wright provides radiation-hardened and safety-certifiable embedded computing modules for space and defense. Adjacent incumbent in the broader space on-board compute stack where FENTISS software runs.

Emerging players

• RTEMS Project: RTEMS is an open-source real-time operating system used in spaceflight (including NASA missions). It is an emerging alternative to commercial safety-critical RTOS/hypervisor stacks like XtratuM for non-safety-critical partitions.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/fentissXM
• YouTubeyoutube.com/user/fentISSolutions
• LinkedInes.linkedin.com/company/fentiss
• Instagraminstagram.com/fentissxm

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about fentISS