XRG Simulation GmbH

What XRG Simulation GmbH does

XRG Simulation GmbH is a privately held German engineering software company founded in March 2005 in Hamburg, specializing in Modelica-based numerical simulation for thermal, HVAC, and energy systems. The company develops and commercializes a portfolio of proprietary Modelica libraries — HumanComfort (thermal comfort for buildings, vehicles, and cabins), HVAC (building heating/cooling systems), FluidDynamics (coarse-grid CFD via Navier-Stokes), ClaRa+ (power plant and energy system modeling), and SMArtInt+ (neural-network integration with physics models) — alongside applications Score (Excel-based FMU simulation and Dymola control) and ModelOpt (parameter optimization). Headquartered in Hamburg with offices in Bremen, Ingolstadt, and Böblingen, the firm maintains a 21-employee operating base and has reached 200+ customers as of March 2026.

XRG monetizes through commercial software licenses (purchase or rental, with bundle pricing via the XRG Suite), professional simulation and R&D services, and training courses. Go-to-market is sales-led and consultative: direct enterprise engagement is supplemented by a global distribution partnership with Dassault Systèmes (since 2015) and dedicated regional resellers covering North America, Korea, China, and Japan. The company also maintains an open-source library portfolio (SMArtInt, TransiEnt, ClaRa, FluidDissipation) and participates in the Modelica Association, OSMC, and EU-funded research consortia (OpenSCALING, EVEREST) to drive ecosystem adoption. Customers span automotive, aviation, building/HVAC, and energy-system operators, with named users including AIT, Stadt Bonn, foundation°, Vilisto, and SBC.sim. The company has secured four Modelica Library Awards (2009, 2021, 2023, 2025), TISAX Assessment Level 2 certification (valid until May 2028), and DIN EN ISO 9001 certification (August 2025).

Name

XRG Simulation GmbH

Legal name

XRG Simulation GmbH

Website

https://xrg-simulation.de

Company type

Private

Founded year

2005

Operating status

Operating

Headcount range

11–50 employees

Short description

XRG Simulation GmbH develops Modelica-based simulation libraries and applications for thermal comfort, HVAC, fluid dynamics, and power-plant energy systems. The 2005-founded German firm serves automotive, aviation, building, and energy customers across more than 200 accounts globally.

Ownership category

akta.pro rank

Product category

Engineering Simulation Software

NAICS

Software Publishers (5132)

SIC

Services-Prepackaged Software (7372)

akta.pro primary industry

Serious Games & Simulation Studios (Training, Defense, Enterprise) (MPAFAAAH)

Keywords

• Modelica simulation software
• Thermal management simulation
• HVAC energy modeling
• CFD fluid dynamics software
• Building energy simulation

Headquarters

HQ city

Hamburg

HQ country

Germany

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Software

Cost components

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

Revenue model

1. Software Licenses: Commercial Modelica libraries (HumanComfort, HVAC, FluidDynamics, ClaRa+, SMArtInt+) and applications (Score, ModelOpt) sold as licenses. Available for purchase or rental.
2. Professional Services: Simulation services including vehicle thermal management, building/HVAC simulation, energy simulation in aviation, renewable energies, fire protection consulting, and R&D contracts.
3. Training Services: Training courses for Modelica, HumanComfort Library, HVAC Library, ClaRa+, SMArtInt+, and Score Application.
4. Open Source Libraries: Free open-source libraries including SMArtInt, TransiEnt Library, ClaRa Library, and FluidDissipation Library. Used to build ecosystem and drive adoption.

Pricing tiers

Go-to-market motion1 record

Distribution channels6 records

Marketing channels8 records

Core offering

XRG Simulation GmbH develops and sells proprietary Modelica-based simulation software libraries and applications that enable virtual testing of thermal management, HVAC, fluid dynamics, power plant, and AI-enhanced energy systems. Its commercial product portfolio includes the HumanComfort, HVAC, FluidDynamics, ClaRa+, and SMArtInt+ libraries, plus the Score and ModelOpt applications, available individually or bundled as the XRG Suite via license purchase or rental. The company complements its software with professional simulation services, R&D consulting, and Modelica training courses.

Product overview

XRG Simulation GmbH offers a Modelica-based simulation product portfolio consisting of commercial libraries (HumanComfort, HVAC, FluidDynamics, ClaRa+, SMArtInt+) and applications (Score, ModelOpt). The core libraries provide specialized modeling capabilities: HumanComfort handles thermal comfort analysis, HVAC covers building energy systems, FluidDynamics enables coarse-grid CFD, ClaRa+ focuses on power plant simulation, and SMArtInt+ integrates neural networks for AI-enhanced modeling. The Score and ModelOpt applications extend functionality by enabling Excel-based simulation workflows and automated optimization. Products are available individually or bundled as the XRG Suite and are compatible with Dymola, OpenModelica, and Modelon Impact.

Differentiator

Problem solved

Functional benefit

Products and services

• HumanComfort Library

Quantifiable outcome

• Whole-year HVAC simulations in minutes
• +2 more outcomes

Named customers6 records

Segments5 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration9 records

AI capability6 records

Feature7 records

Partnerships

14 partnerships are on record, tiered core, regional and minor.

• EVEREST Project ConsortiumcoreStrategic or Co-development Partner · 12 May 2026Horizon Europe project with 12 European partners from research and industry developing thermal and energy management solutions for battery-electric vehicles. XRG contributes simulation expertise for thermal management optimization.
• Nanjing Yuansi SimTek Co., Ltd.regionalChannel Partner/ Reseller/ Distributor · 23 December 2025SimTek assumed distribution for all XRG products in People's Republic of China from December 2025. Long-standing collaboration in Modelica dissemination.
• OpenSCALING ConsortiumcoreStrategic or Co-development Partner · 10 March 2025European ITEA4 project with partners from 6 countries focused on open standards for scalable virtual engineering. XRG participates from April 2025 to December 2026. Funded by BMBF (01IS23062K).
• Model Based Innovation LLCregionalChannel Partner/ Reseller/ Distributor · 27 February 2025New reseller for North America (United States and Mexico) starting February 2025.
• Rui Gao (Modelica Association Secretary)regionalChannel Partner/ Reseller/ Distributor · 26 January 2024XRG-Reseller for Japan and VR China. Rui Gao, Secretary of the Modelica Association, serves as regional reseller appointed January 2026.
• Simulation Lab Inc.regionalChannel Partner/ Reseller/ Distributor · 25 May 2023Regional distributor for Korea. Simulation Lab has been a long-term collaboration partner for Modelica dissemination.
• TransiEnt ConsortiumcoreStrategic or Co-development Partner · 1 May 2021XRG is an initial member of the TransiEnt Consortium developing the TransiEnt Library for sector-coupled integrated energy systems analysis.
• Dassault SystèmescoreChannel Partner/ Reseller/ Distributor · 1 April 2015XRG became a partner of Dassault Systèmes starting April 2015, enabling global distribution of XRG Modelica Libraries through the Dassault Systèmes ecosystem.
• LTX Simulation GmbHcoreStrategic or Co-development Partner · 1 October 2014Partner company founded in Munich in October 2014. LTX Simulation co-organizes TherMoSim conferences and collaborates on Modelica and FMI user meetings.
• Modelica AssociationcoreStrategic or Co-development Partner · 1 November 2010XRG became a member of the Modelica Association contributing libraries to the Modelica Standard Library. Actively shapes the Modelica language development.
• TLK-Thermo GmbHcoreStrategic or Co-development PartnerResearch and industry partner collaborating on ThermMoSim conferences and joint research projects including OPENPROD (funded by BMBF 01IS09029G).
• TUHH (Hamburg University of Technology)coreStrategic or Co-development PartnerLong-standing research partnership including TransiEnt Library development, lecture operations (started 2016), and various joint research projects.
• ZAL (Center for Applied Aviation Research)minorStrategic or Co-development PartnerXRG presented at ZAL opening in March 2016. Collaborative research in aviation simulation.
• Open Source Modelica Consortium (OSMC)coreStrategic or Co-development PartnerXRG is a member supporting the development and promotion of OpenModelica open-source implementation and related standards (FMI, SSP, DCP).

Scale indicators3 records

Recent moves10 records

Expansion highlights6 records

Market position

Competitive moat5 records

Key highlights7 records

Customer concentration

• GitHubgithub.com/xrg-simulation
• YouTubeyoutube.com/@XRG-Simulation
• LinkedInlinkedin.com/company/xrg-simulation-gmbh
• Instagraminstagram.com/xrg_simulation

Compliance2 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 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 XRG Simulation GmbH