These Viennese companies primarily operate in hardware manufacturing, with a strong emphasis on IT services, machinery manufacturing, and specialized communication systems. The list includes established mid-sized firms and several larger groups, alongside younger companies focusing on emerging technologies. Key players include Frequentis, an international supplier of communication and information systems; ANDRITZ Hydro, a global leader in hydropower equipment; Kapsch Group, a technology corporation focused on innovation; and TTTech Auto, which provides platform products for software-defined vehicles. Many of these companies specialize in critical infrastructure and industrial applications.
A notable pattern among these companies is their specialization in industrial and safety-critical applications. For instance, Frequentis and Kapsch TrafficCom AG both provide solutions for complex traffic management and public safety. Similarly, TTTECH focuses on networked computing platforms for aviation and manufacturing, while WITTMANN Group manufactures machinery for plastic processing. This indicates a concentration in sectors that require robust and reliable hardware and integrated systems.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Frequentisfrequentis.com
An international supplier of communication and information systems for control centers with safety-critical tasks in air traffic management and public safety & transport sectors |
2,573 | |||
| 2 |
ANDRITZ Hydroandritz.com
Global leader in supplying electromechanical equipment and services for hydropower stations, offering innovative solutions for new and existing plants, and comprehensive maintenance services |
2,545 | |||
| 3 |
Kapsch Groupkapsch.net
Global technology corporation with a focus on innovation and customer satisfaction, investing in research and development to bring new solutions to market |
1,743 | |||
| 4 |
Kapsch TrafficCom AGkapsch.net
Provider of innovative tolling and traffic management solutions, covering design, implementation, and operation for sustainable mobility worldwide. |
1,345 | |||
| 5 |
TTTech Autotttech-auto.com
Provides platform products and services focusing on system, safety, and security for the Software-Defined Vehicle, enabling OEMs to accelerate development and optimize performance. |
1,062 | |||
| 6 |
TTTECHtttech.com
Provides safe, secure, networked computing platforms for industries like aviation, space, manufacturing, and energy, enabling autonomous systems through continuous innovation. |
825 | |||
| 7 |
WITTMANN Groupwittmann-group.com
Manufacturing injection molding machines, robots, and auxiliary equipment for plastic processing, specializing in energy-efficient technology and material handling for smart factory production cells. |
805 | |||
| 8 |
Printec Groupprintecgroup.com
A leader in transaction technologies, offering solutions to improve customer interactions, enhance operations, and ensure regulatory compliance in Central and Eastern Europe |
800 | |||
| 9 | 753 | ||||
| 10 |
Plasser & Theurer Export von Bahnbaumaschinen G.m.b.H.plassertheurer.com
Manufacture and supply of diverse railway track maintenance machines, offering worldwide service, training, spare parts, and technical support. |
688 | |||
| 11 |
Kapsch TrafficCom North Americakapsch.net
Provider of innovative tolling and traffic management solutions, covering design, implementation, and operation for sustainable mobility worldwide. |
588 | |||
| 12 |
RISE - Research Industrial Systems Engineeringrise-world.com
Internationally recognized IT R&D provider offering consultancy, research & development in information technology, specializing in critical environments and large-scale projects |
516 | |||
| 13 |
Kontron Transportationkontron.com
provides end-to-end communication solutions for railways including GSM-R, FRMCS, 5G networks, cybersecurity, and fare collection systems |
473 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 14 |
Schrack Seconet AGschrack-seconet.com
An Austrian high-tech company specializing in fire alarm systems, health care systems, and security solutions, with a focus on people |
441 | |||
| 15 |
EVVA Sicherheitstechnologie GmbHevva.com
A family-owned company specializing in access control and security solutions, providing innovative locking systems and customized security solutions worldwide since 1919 |
330 | |||
| 16 |
iSi Automotiveisi.com
A global firm specializing in manufacturing pressure vessels for automotive industry, focusing on innovative vehicle safety solutions with advanced technology |
307 | |||
| 17 |
ANDRITZ Metalsandritz.com
Global supplier of complete production lines for cold-rolled strip made of various metals, including pickling, rolling, heat treatment, coating, and furnace systems |
306 | |||
| 18 |
Starlinger & Costarlinger.com
Global supplier of machinery and complete lines for woven plastic bag production, plastic recycling plants, and rPET sheet extrusion and refinement systems. |
292 | |||
| 19 |
Biolitecbiolitec.com
Global medical device company specializing in medical laser and fiber technology, offering innovation in photodynamic therapy to enhance patient outcomes worldwide |
203 | |||
| 20 |
Canon Austria GmbHcanon.at
The company provides imaging solutions, office automation, and digital production services in Austria to help businesses drive profitability and innovation |
186 | |||
| 21 |
TTControlttcontrol.com
Development and supply of safety control systems, rugged displays, connectivity, and IoT solutions for mobile machinery and off-highway vehicles. |
125 | |||
| 22 |
ista 脰sterreichista.com
A global energy service provider specializing in promoting energy efficiency in buildings by making individual energy and water usage transparent and manageable for customers worldwide |
87 | |||
| 23 |
Cubicure GmbHcubicure.com
Vienna-based company specializing in industrial 3D printing solutions for polymer parts using Hot Lithography process to produce high-precision components |
63 | |||
| 24 |
Rejlek Metal&Plastics Grouprejlek.at
A family business with 800 employees across four sites in Europe, specializing in manufacturing components for various industries with a focus on plastics and metal technology |
51 | |||
| 25 |
TU Wien Space Teamspaceteam.at
A student-led group at the Technical University of Vienna specializing in aerospace engineering, designing experimental rockets, rocket engines, and mini satellites for civil use |
38 | |||
| 26 |
AUTO PLUS Fahrzeugzubeh枚r GmbHautoplus.at
A supplier of stylish and practical automotive accessories, offering a wide range of products for various vehicle makes and models since 1989 |
32 | |||
| 27 |
Cubro Network Visibilitycubro.com
Specializing in network visibility solutions, the company offers TAPs, packet brokers, and probes to ensure optimal traffic monitoring for enterprises and carriers |
30 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 11, 2026.
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