Jožef Stefan Institute

What Jožef Stefan Institute does

Jožef Stefan Institute (Institut "Jožef Stefan", IJS) is Slovenia's largest public multidisciplinary research institute, founded in 1949 and headquartered on Jamova cesta 39 in Ljubljana, with a secondary Reactor Center in Dol pri Ljubljana housing the TRIGA research reactor and the Tandetron ion accelerator. The institute operates across natural, technical, and life sciences — spanning nanotechnologies, advanced materials, biotechnologies, control and production technologies, communication and computer technologies, knowledge technologies, environmental technologies, and reactor engineering — and is the national anchor for ERC-funded frontier research (Prof. Dr. Dragan Mihailović alone holds four ERC projects, the most of any Slovenian researcher).

The institute's portfolio couples fundamental research with applied delivery through three structural revenue streams: (1) competitive public research funding led by ARIS (the Slovenian Research Agency) and supplemented by the Ministry of Higher Education, Science and Technology, plus European sources including ERC, Horizon Europe, and the EuroHPC Joint Undertaking (notably the €150M SLAIF AI factory led jointly with IZUM); (2) contracted development projects executed for domestic and foreign industry via the dedicated Service for Cooperation with Economy (U8/SPOG) and partner organizations including transmission operator ELES; and (3) technology transfer and licensing through the Center for Technology Transfer and Innovation (CTT/U7), including patented software such as the DyThera dynamic line-rating system (commercialized since 2021 via spin-off Operato), the FEMTOGAPENGINE superconducting-circuit control method developed under Prof. Mihailović, and an industrial-property portfolio of 15+ patents with active prosecution.

IJS is institutionally embedded in Slovenia's deep-tech ecosystem as co-founder of Tehnološki park Ljubljana, the University of Nova Gorica, and the Jožef Stefan International Postgraduate School, and as host of UNESCO's International Research Center for Artificial Intelligence (IRCAI). It is governed by an independent Board of Governors and a Scientific Council under Director Prof. Dr. Leon Cizelj, with primary funding flows originating from ARIS, EU research programs, and industry contracts — it is not a venture-backed entity and does not have external shareholders.

Name

Jožef Stefan Institute

Legal name

Institut "Jožef Stefan"

Website

https://ijs.si

Company type

Private

Founded year

1949

Operating status

Operating

Headcount range

501–1,000 employees

Short description

Jožef Stefan Institute (IJS) is Slovenia's largest public multidisciplinary research institute, founded in 1949, conducting frontier research in natural, technical, and life sciences and serving government funders (ARIS, EU), industry partners, and the European research community from Ljubljana.

Ownership category

akta.pro rank

Product category

Scientific Research Services

NAICS

Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) (541715), Research and Development in the Physical, Engineering, and Life Sciences (54171), Scientific Research and Development Services (5417)

SIC

Services-Commercial Physical & Biological Research (8731), Services-Testing Laboratories (8734), Services-Engineering, Accounting, Research, Management (8700)

akta.pro primary industry

Technology Transfer & Innovation-Driven Research Universities (High Commercialization) (EDAHABAH)

akta.pro secondary industries

Biomedical Sciences & Medical Research Institutes (University-Based) (EDAHAGAI), Science, Technology & Innovation Administration (National R&D Policy) (BPAIAAAK)

Keywords

• Scientific research services
• Applied research
• Technology transfer
• Nuclear reactor research
• Nanotechnology research

Headquarters

HQ city

Ljubljana

HQ country

Slovenia

HQ region

Europe

Offices4 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Infrastructure, Operations

Revenue model

1. Public Research Funding: Primary funding through competitive research projects funded by ARIS (Slovenian Public Agency for Scientific Research), including research programs, fundamental and applied projects, postdoctoral projects, and young researcher projects.
2. Industry Development Projects: Development projects conducted for clients from industry and various domestic and foreign knowledge and new technology users. Projects can be co-financed through public calls.
3. Technology Transfer and Licensing: Protection and commercialization of intellectual property, including patent licensing and sale of industrial property to companies that participated in development.

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Jožef Stefan Institute is Slovenia's largest multidisciplinary research institution conducting fundamental and applied research across natural sciences, technical sciences, and life sciences. It provides R&D services, technology development, intellectual property licensing, and specialized research infrastructure access (including a TRIGA research reactor and Tandetron ion accelerator) to public funding bodies, industrial clients, and international research partners. Commercialized offerings include DyThera software for power transmission line thermal prediction and various research outputs developed into spin-off companies.

Product overview

Jožef Stefan Institute is Slovenia's largest research institution offering a diverse portfolio of scientific services, technologies, and software products. The institute's offerings span fundamental and applied research across multiple disciplines including physics, chemistry, materials science, biotechnology, nuclear engineering, robotics, artificial intelligence, and environmental technologies. Key commercialized offerings include DyThera software for power grid thermal prediction, while the institute provides technology transfer services, intellectual property protection, and collaborative R&D projects with industry through its technology transfer office and various specialized centers.

Differentiator

Problem solved

Functional benefit

Products and services

• DyThera
• Scientific Computing Laboratory Services
• Industry Development Projects
• Technology Transfer and Licensing
• TRIGA Research Reactor Access
• Tandetron Accelerator Services

Quantifiable outcome

• DyThera software deployed globally since 2021 for transmission network operators
• +2 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability3 records

Feature4 records

Partnerships

Nine partnerships are on record, tiered core and minor.

• OperatocoreStrategic or Co-development PartnerOperato commercialized the DyThera software developed by IJS's Laboratory for Scientific Computing since 2021, marketing it globally as part of the dynamic transmission line rating system SUMO. The software helps transmission network operators predict thermal states of power lines based on weather and operating conditions.
• ELEScoreStrategic or Co-development PartnerSlovenian electricity transmission system operator that initiated the development of DyThera software after the 2014 ice storm, collaborating with IJS's Laboratory for Scientific Computing to develop smart grid technologies.
• miDALIXminorStrategic or Co-development PartnerSlovenian technology company collaborating with Prof. Dr. Dragan Mihailović's team on the FEMTOGAPENGINE ERC Proof of Concept project for superconducting circuit control technology.
• University of LjubljanacoreStrategic or Co-development PartnerMajor Slovenian university with formal cooperation agreement. Institute professors participate in teaching at all Slovenian universities and the Faculty of Mathematics and Physics (FMF UL) collaborated on fullerene research published in Nature Communications.
• EuroHPC Joint UndertakingcoreStrategic or Co-development PartnerEuropean partnership for high-performance computing. Slovenia, led by IJS and IZUM, is hosting the SLAIF AI factory as part of EuroHPC's network. IJS also participates in pilots using the Vega EuroHPC supercomputer.
• European Research Council (ERC)coreStrategic or Co-development PartnerEU funding body supporting frontier research. IJS researchers have received multiple ERC grants, with Prof. Dr. Dragan Mihailović holding the most ERC projects in Slovenia (4 grants including Proof of Concept awards).
• Tehnološki park LjubljanacoreStrategic or Co-development PartnerIJS is co-founder of the Ljubljana Technology Park, where companies can relocate after incubation. The institute provides ideal conditions for company creation in pre-incubation and incubation phases.
• Mednarodna podiplomska šola Jožefa StefanacoreStrategic or Co-development PartnerInternational Postgraduate School Jožef Stefan, co-founded by IJS, providing postgraduate education in natural sciences and engineering.
• UNESCO International Research Center for Artificial Intelligence (IRCAI)minorStrategic or Co-development PartnerIJS hosts the UNESCO International Research Center for Artificial Intelligence, contributing to global AI research and policy development.

Scale indicators4 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• CEA (French Alternative Energies and Atomic Energy Commission): CEA is a major French public R&D organization with deep nuclear research capabilities (comparable to JSI's TRIGA reactor and reactor center) and broad multidisciplinary research including energy, materials, and life sciences. It is a much larger incumbent in overlapping domains.
• Fraunhofer Society: Fraunhofer is the largest applied research organization in Europe, with multiple institutes covering a similar multidisciplinary scope as JSI (materials, ICT, energy, life sciences). It is comparable as a broader incumbent in the same RTO space.
• CSIC (Spanish National Research Council): CSIC is Spain's largest public research institution, multidisciplinary and government-funded like JSI. Comparable in structure and tech-transfer orientation, though operating at a larger scale.
• Italian National Research Council (CNR): CNR is Italy's largest public research institution, covering a multidisciplinary scope similar to JSI's (materials, biotech, ICT, energy). It is a much larger incumbent in the same public-research space.

Direct peers

• TNO (Netherlands Organisation for Applied Scientific Research): TNO is the Dutch national applied research organization with multidisciplinary research and a strong tech-transfer focus, structurally very similar to JSI. Both are independent, government-funded RTOs that bridge academic research and industry.
• SINTEF: SINTEF is Norway's largest independent research institute, with similar characteristics to JSI: multidisciplinary, government-funded, with strong industry collaboration and tech transfer. Comparable in size and mission.
• AIT Austrian Institute of Technology: AIT is Austria's largest non-university research institution with applied R&D across energy, mobility, health, and digital. Like JSI, it operates national-scale infrastructure and bridges research and industry, and is a regional peer in Central Europe.
• VTT Technical Research Centre of Finland: VTT is Finland's national research institution with a similar mandate to JSI: applied R&D across multiple disciplines, large-scale national research infrastructure, and active technology transfer to industry. The two are directly comparable in size, mission, and funding model.

Emerging players

• imec: imec is a leading European R&D center with deep specializations overlapping JSI's strengths in nanotechnology, advanced materials, and superconducting/quantum devices. While imc has a narrower focus, both operate large-scale national/regional R&D infrastructure with strong industry partnerships.
• Barcelona Supercomputing Center (BSC): BSC is a Spanish national supercomputing center that, like JSI, hosts a EuroHPC supercomputer (MareNostrum) and operates a EuroHPC AI factory. BSC is a directly comparable peer for JSI's EuroHPC AI factory positioning and high-performance computing activities.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/JSI_SLO
• Facebookfacebook.com/ijs.si
• LinkedInlinkedin.com/company/jozef-stefan-institute
• Instagraminstagram.com/institutjozefstefan
• TikToktiktok.com/@stefan.je.zakon

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries6 records

Funding overview

Funding rounds

Investors

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M&A

Investments

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Frequently asked questions about Jožef Stefan Institute