What GTD GmbH does

GTD GmbH is a privately held German space software engineering firm founded in 2013 and headquartered in Markdorf, Baden-Württemberg. It operates as the German arm of the international GTD Group, whose Spanish parent company is GTD Sistemas de Información. The firm specializes in safety-critical on-board and flight software for the European space sector, serving the European Space Agency (ESA), large system integrators such as Airbus Defence and Space, and German public research institutions including DLR, BAM, and the Federal Environmental Agency. Its core technology portfolio centers on ECSS-compliant software engineering for embedded processors (ARM AM335x, SPARC LEON2-4, RISC-V) under RTEMS, Linux, and bare-metal environments, following Scrum and V-model processes with MISRA-C discipline.

GTD's proprietary products include LibmCS, a pre-qualified open-source mathematical library (ECSS E-ST-40 / Q-ST-80 Category B) already integrated into VEGA-C, Euclid, and Meteosat Third Generation (MTG) missions; the MAXI Toolbox for library qualification; and the MC/DC Checker, a verification tool officially recommended in NASA's Software Engineering and Assurance Handbook (NASA-HDBK-2203). Additional offerings include VirtUA, a handheld augmented-reality assistant for Assembly, Integration, and Test (AIT) activities, and the Computer Efficiency Testing Software benchmark developed with CLASP and Intertek UK for European Commission energy-labelling programs.

The business combines professional services (custom software development, ECSS qualification consulting, embedded hardware design and production) with a freemium open-source distribution model for its tools via GitLab. Pricing is project-based with no public rate cards; revenue flows from ESA framework contracts (GSTP/TRP programs), prime contractor subcontracts, and direct German public-sector engagements. Two managing directors (Andoni Arregui and Matteo Bertuzzi) lead an 8-person organization.

Name

GTD GmbH

Legal name

GTD GmbH

Website

https://gtd-gmbh.de

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

1–10 employees

Short description

GTD GmbH is a German space-software engineering firm specializing in ECSS-compliant flight software, pre-qualified mathematical libraries (LibmCS), and MC/DC verification tools for ESA, aerospace primes, and German public-sector clients.

Ownership category

akta.pro rank

Product category

Space Software Engineering

NAICS

Guided Missile and Space Vehicle Manufacturing (336414), Custom Computer Programming Services (541511), Computer Systems Design and Related Services (5415)

SIC

Guided Missiles & Space Vehicles & Parts (3760), Search, Detection, Navagation, Guidance, Aeronautical Sys (3812), Services-Computer Programming Services (7371)

akta.pro primary industry

Spacecraft Avionics, Flight Computers & Software (IMABACAI)

akta.pro secondary industries

Military Space Systems (Defense Spacecraft) (IMABACAC), IT Governance, Risk & Compliance (IT GRC) Platforms (HDAEALAK)

Keywords

• Space software engineering
• ECSS compliant software
• Embedded systems development
• Flight software
• Mathematical libraries

Headquarters

HQ city

Markdorf

HQ country

Germany

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Infrastructure, Operations, Marketing or Sales

Revenue model

1. Custom Software Development Services: GTD GmbH provides end-to-end software development services for space sector clients including requirement analysis, design, development, test and validation. Projects include embedded software for satellites, ground support systems, control systems, and specialized applications.
2. ECSS Qualification Services and Qualification Data Packages: Provides qualification consulting and documentation packages for software qualification according to ECSS E-ST-40 and Q-ST-80 Category B standards. The Qualification Data Package (QDP) supports automatic qualification and includes step-by-step guidelines, templates, engineering documentation, and full qualification evidence.
3. Open Source Software (LibmCS, MAXI Toolbox, MC/DC Checker): LibmCS and MC/DC Checker are freely available as open source on GitLab. MAXI Toolbox is available on request. These tools build brand reputation and demonstrate technical expertise in the space software domain.
4. Hardware Development and Production: GTD GmbH develops and produces hardware products including control boxes for space experiments, embedded hardware according to customer requirements, and electronics prototypes. Includes complete development and production of control systems with mechanics, electronics, and software integration.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels5 records

Core offering

GTD GmbH provides custom software engineering services and develops specialized software tools for the space sector, with a focus on ECSS-compliant on-board/flight software, embedded systems, and mathematical libraries. The company delivers end-to-end software development (requirement analysis, design, development, test, validation), ECSS qualification services, embedded hardware development, and maintains a portfolio of open-source space software tools including the LibmCS mathematical library and MC/DC Checker.

Product overview

GTD GmbH is a software and hardware engineering company founded in 2013, specializing in on-board software for the space sector. The company offers a portfolio of products and services including: LibmCS (Mathematical Library for Critical Systems) with its companion MAXI Toolbox for qualification; ECSS Cat-A qualification tools (MC/DC Checker, ELF Checker, OCGraph, OCCTRE); VirtUA augmented reality system for electronics testing; and Computer Efficiency Testing Software for PC energy labelling. Services span application development (Python/C#/web), embedded software/hardware development, and software process consulting. The product portfolio is unified by GTD GmbH's focus on high-reliability, standards-compliant development for aerospace and safety-critical applications.

Differentiator

Problem solved

Functional benefit

Brands

• LibmCS: Mathematical Library for Critical Systems - an extensively tested and validated mathematical library (libm) providing predictable accuracy results, designed for space software qualification according to ECSS E-ST-40 and Q-ST-80 Category B.
• MAXI Toolbox
• MC/DC Checker

Products and services

• LibmCS (Mathematical Library for Critical Systems) An extensively tested and validated open-source mathematical library (libm) providing predictable accuracy results for critical systems. Based on FDLIBM and forked from Newlib, supports POSIX, IEEE-754 2019, ISO C18, MISRA-C 2012, and ECSS E-ST-40/Q-ST-80 Category B. Available for x86-64, ARM, RISC-V, and SPARC V8 (LEON 2/3/4) processors.
• MAXI Toolbox

Quantifiable outcome

• LibmCS integrated in VEGA-C, Euclid, and MTG (Meteosat Third Generation) missions
• +2 more outcomes

Named customers5 records

Segments3 records

Ideal customer profiles2 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Feature4 records

Partnerships

Five partnerships are on record, tiered core, major and minor.

• GTD Sistemas de InformacióncoreStrategic or Co-development PartnerSpanish mother company of GTD GmbH. GTD GmbH is the German part of the international GTD Group. Companies collaborate on major projects such as the DLR P3.2 test bench renewal control system development.
• European Space Agency (ESA)coreStrategic or Co-development PartnerPrimary customer and strategic partner. ESA finances activities through GSTP and TRP programs. GTD GmbH has multiple ESA contracts including LibmCS development (4000130278/20/NL/AS) and PRECAST project (4000122343/17/NL/FE/as).
• CLASPmajorStrategic or Co-development PartnerPrivately funded NGO working with GTD GmbH on Computer Efficiency Testing Software since 2020. Partnership involves developing efficiency benchmarks for personal computers for the European Commission. CLASP coordinates with European Commission and computer manufacturing OEMs.
• Intertek UKmajorStrategic or Co-development PartnerPartnership with GTD and CLASP for Computer Efficiency Testing Software development. Intertek contributes testing expertise for the European Commission project on computer energy efficiency.
• DIGITALEUROPEminorGTM or Marketing PartnerIndustry association representing largest computer manufacturing OEMs. GTD GmbH's Computer Efficiency Testing benchmark is evaluated with OEMs represented in DIGITALEUROPE.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Broad incumbents

• SolenIQ (formerly SCISYS / CGI): UK-origin space software house (now part of CGI) delivering mission-critical space software, ground systems, and autonomy solutions for ESA. Direct overlap on ECSS-graded software services.
• Terma A/S: Danish aerospace and defense group with embedded mission software for space, including ECSS-compliant modules and on-board computers. Overlaps GTD's mix of hardware and safety-critical software work.
• Deimos Space (Elecnor Deimos): Spanish space engineering company delivering flight software, ground systems, and mission analysis for ESA programs. Direct overlap on ECSS-grade space software services with European primes and agencies.
• Kongsberg Defence & Aerospace: Norwegian group with space avionics, propulsion, and embedded-software offerings. Builds ECSS-qualified on-board subsystems comparable in safety regime to GTD's flight software tooling.
• GMV Innovating Solutions: Large Spanish space and defense software house operating ESA-critical flight software, GNSS, and ground systems. Overlaps GTD's ECSS flight-software niche but at far greater scale and across multiple European programs.
• Kontron (S&T Embedded): European embedded-computing vendor whose on-board computers power European space missions and whose EPIC/AMC platforms complement GTD's flight-software expertise. The same flight-software stack is often deployed on these boards.
• Beyond Gravity: Swiss-built space hardware and electronics supplier (formerly RUAG Space) whose avionics and on-board computers sit alongside GTD's flight-software stack. Comparable focus on safety-critical space components for ESA missions.
• CS Group: French space and mission systems integrator (formerly CS Systèmes d'Information) offering flight software, ground systems, and AIT services. Comparable ECSS-qualified software capability serving CNES and ESA.

Direct peers

• HE Space Operations: Specialized space-sector engineering services provider seconding software and systems engineers into ESA and European primes. Closely comparable business model targeting the same ECSS-flight-software skill pool.
• Solenix AG: Swiss space software engineering firm of comparable size and specialization, focused on on-board software, ECSS-compliant development, and ground segment software for ESA and European institutions. Closest competitor by mission, customer set, and niche positioning.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• GitHubgitlab.com/gtd-gmbh
• LinkedInlinkedin.com/company/gtd-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Profiles2 records

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 GTD GmbH