iesy GmbH

iesy is a German technology brand associated with embedded computing. Under the name iesy GmbH, the company describes itself as a medium-sized manufacturer and development partner for advanced embedded computing solutions, designing and producing intelligent embedded systems for mission-critical applications. Its technologies are deployed in safety-relevant environments such as military platforms, railway infrastructure control and secure industrial systems. The company positions itself around the idea of digital sovereignty, arguing that technological independence requires specialised embedded systems, proprietary security-critical hardware architectures and encrypted communication systems that do not rely on external providers. iesy GmbH organises its offering around three main markets. In Digital Defense it develops and manufactures embedded computers for mission-critical defence applications, with real-time capability, support for air-gapped networks, high-standard encryption, and reliable operation under vibration, heat and moisture. In Critical Infrastructure it supplies embedded systems for high-availability, high-security environments, protecting networks through integrated security mechanisms, physical intrusion detection and secure data transmission, with modular designs for flexible integration and long-term resilience. In Industrial Computing it develops tailored embedded systems that enable precise control of complex processes and safe interaction between humans, machines and robotics, including compact devices for stable data acquisition and panel PCs with touchscreens for intuitive operation under demanding conditions. Technologically, iesy works across computer hardware foundations of modern embedded architectures. This includes Computer-on-Modules (COM) based on established form factors, processor architectures chosen for reliability, integration capability and long-term availability, and storage media selected for performance, lifetime and data security in harsh environments. The company states that it is an active member of the Standardization Group for Embedded Technologies (SGeT), contributing its know-how to the further development of proven standards. Its engineering approach combines embedded computing, high-speed design and security-by-design. The iesy brand has a dual history in Germany. The current embedded-computing company traces its own development back to 1966 and describes a transition from 'ies' to 'iesy' as a decisive moment in its evolution, alongside expansion of its facilities. Separately, the name iesy was used from 1999 to 2007 by iesy Hessen GmbH & Co. KG, a regional cable-network operator in Hesse headquartered in Darmstadt. That business emerged from the regulatory spin-off of Deutsche Telekom's Hessian cable network, started as Hessen Kabel GmbH, used the brand name eKabel in 2000, and was later renamed Iesy. It offered analogue and digital cable television, telephone connections and high-speed internet access, and from November 2005 belonged to Unity Media together with ish. On 22 May 2007 the regional cable operators iesy, ish and Tele Columbus West were merged into the new Unity Media brand. The legal successor of the Kommanditgesellschaft remained Unitymedia Hessen GmbH & Co. KG, later part of Vodafone Deutschland as Vodafone Hessen GmbH & Co. KG. Because of the shared name, the Meinerzhagen system house is sometimes mistakenly regarded as the legal successor of the cable operator; it has taken over the trademark rights and international domains, but the cable company's legal successor is the Vodafone entity. Today the iesy brand is primarily known through iesy GmbH and its embedded-computing activities, with the official website at iesy.com presenting markets, technologies and company news. The company emphasises reliable, secure systems 'Made in Germany' and a partnership-driven, custom-development approach for clients whose requirements exceed standard solutions.

The iesy name is connected to two distinct German technology businesses. The first is the current embedded-computing company iesy GmbH, which traces its own development back to 1966 and describes a transition from 'ies' to 'iesy' as a decisive moment in its evolution, together with the expansion of its facilities. This company presents itself as a medium-sized partner for advanced embedded computing, designing and manufacturing intelligent embedded systems for mission-critical applications in military platforms, railway infrastructure control and secure industrial systems. It emphasises proprietary security-critical hardware architectures and encrypted communication systems as a route to digital sovereignty without reliance on external providers. The second and historically separate business is iesy Hessen GmbH & Co. KG, a regional cable-network operator in Hesse that existed from 1999 to 2007 and was headquartered in Darmstadt. It arose in 1999 from the regulatory spin-off of Deutsche Telekom's Hessian cable network. It initially started under the name Hessen Kabel GmbH, used the brand name eKabel in 2000, and was later renamed Iesy. Most of its employees came from Deutsche Telekom. Its first investor was Klesch & Company Ltd. of London, which acquired 65 percent of Hessen Kabel GmbH as of 1 July 2000 for a price of two billion Deutsche Mark. This made it, after the cable network in North Rhine-Westphalia, the second successful sale of a cable network. At that time 1.3 million customers in Hesse were supplied with cable television. The company offered analogue and digital cable television, telephone connections and high-speed internet access. The broadband networks had originally been built by Deutsche Telekom. From November 2005 iesy belonged to Unity Media together with ish. From spring 2006 all Tele Columbus customers in Hesse were to become iesy customers automatically; the products of ish and iesy were aligned but marketed under separate names. On 22 May 2007 the regional cable-network operators iesy, ish (North Rhine-Westphalia) — both network level 3 — and Tele Columbus West GmbH (network level 4 cable-TV provider) were merged into the new brand Unity Media. Besides classic analogue and digital television offerings, the company also offered return-channel-capable high-speed internet access and telephone connections in some expansion areas. The shared name with a system house in Meinerzhagen has led to that system house sometimes being mistaken for the legal successor of the cable operator. The system house has taken over the trademark rights and the international domains, but the legal successor of the Kommanditgesellschaft remains Unitymedia Hessen GmbH & Co. KG, which in the meantime belongs to Vodafone Deutschland as Vodafone Hessen GmbH & Co. KG. The current iesy GmbH continues to operate in embedded computing, presenting markets in Digital Defense, Critical Infrastructure and Industrial Computing, and describing itself as an active member of the Standardization Group for Embedded Technologies (SGeT).

• 2025

  iesy team participates in the AOK company run in Lüdenscheid on 8 July 2025.

• 2007

  On 22 May 2007 the regional cable operators iesy, ish and Tele Columbus West are merged into the new brand Unity Media.

• 2006

  From spring 2006 all Tele Columbus customers in Hesse are to become iesy customers automatically; ish and iesy products are aligned but marketed under separate names.

• 2005

  From November 2005 iesy belongs to Unity Media together with ish.

• 2000

  The brand name eKabel is used; Klesch & Company Ltd. acquires 65% of Hessen Kabel GmbH as of 1 July 2000 for two billion Deutsche Mark.

• 1999

  iesy Hessen GmbH & Co. KG emerges from the regulatory spin-off of Deutsche Telekom's Hessian cable network, initially as Hessen Kabel GmbH.

• 1966

  The company's own history is traced back to this year, according to iesy GmbH's company page.

Medium-sized German specialist for secure, modular embedded computing in mission-critical environments, emphasising digital sovereignty, security-by-design and 'Made in Germany' engineering.

• Embedded computers for Digital Defense

  Mission-critical defence embedded computers with real-time capability, air-gapped network support, high-standard encryption, and resistance to vibration, heat and moisture.

• Embedded systems for Critical Infrastructure

  High-availability, high-security embedded systems with integrated security mechanisms, physical intrusion detection, secure data transmission and modular designs.

• Industrial Computing embedded systems

  Tailored embedded systems for industrial applications, enabling precise control of complex processes and safe human-machine-robot interaction, including compact data acquisition devices and touchscreen panel PCs.

• Computer-on-Modules (COM)

  Compact, scalable computer modules based on established form factors, separating the standardised computer module from the carrier board.

• Processor architectures

  Selection and integration of established and future-proof processor platforms for reliability, integration capability and long-term availability.

• Storage media

  Storage media selected for performance, lifetime and data security in environments with heat, vibration or dust.

1. 1iesy GmbH - Embedded Computingiesy.com
2. 2Company - iesy GmbHiesy.com
3. 3iesy at the Company Run - iesy GmbHiesy.com
4. 4Technologien - iesy GmbHiesy.com
5. 5Iesywikidata.org
6. 6Iesy Hessende.wikipedia.org