Siedle

Siedle is a German manufacturer of building-communications technology based in Furtwangen im Schwarzwald. The company traces its origins to 1750, when farmer Mathäus Siedle expanded the Bregenbach farm with a foundry producing bells, weights and other cast parts for clockmaking. It later moved from foundry work into telecommunications: by 1900 it was making telephone instruments and accessories, and it became a producer of house and door intercoms after the introduction of Germany’s telecommunications monopoly in 1928. The company celebrated its 275th anniversary in 2025. Today, Siedle’s core business is designing, producing and integrating devices and systems for communication at and within buildings. Its principal offerings include door stations, indoor intercoms and IP-based door-communication systems. It also supplies technologies and products associated with building entrances, including access control and mailboxes. The company presents Siedle IQ as a platform spanning services and devices for IP door communication, and its product developments include solutions for existing two-wire installations as well as larger residential properties. Its Siedle Access system supports networked IP-based building communication, while the Vixinity cloud offering brings together door communication, access control and building-management functions. Siedle identifies itself as one of Europe’s leading manufacturers in its field and emphasizes German development and manufacturing. Its website describes its work as developing, producing and integrating building-communication devices and systems. The brand serves residential building projects and building operators, with products and services aimed at both new construction and renovation. The company is headquartered in Furtwangen, and its group has included related businesses in plastics and electrical engineering, sensor technology, and measurement technology. The German Wikipedia account cautions that these businesses are connected through ownership rather than forming a consolidated corporate group in the legal sense. Siedle has remained a privately held, family-associated business rather than a publicly listed company. Gabriele Siedle led the company alone from 2005 until a three-person management team took over in June 2023. The company’s current website foregrounds continued development of connected entry systems, mobile functions, cloud services and IP communication. Its profile combines a long industrial history with a specialist position in door and building communications.

Siedle traces its history to 1750, when farmer Mathäus Siedle expanded the Bregenbachhof near Furtwangen by adding a foundry. The early foundry made bells, weights and other cast components for the clockmaking trade. A factory built in Furtwangen in 1870 marked the transition toward an industrial enterprise. In 1885, Salomon Siedle II chose “S. Siedle & Söhne” as the company name, the origin of the enduring SSS abbreviation. As clockmaking declined, the business broadened into low-voltage and telegraph technology. It began producing telephone instruments and accessories around 1900, becoming a German pioneer in telegraphy and telephony. The introduction of Germany’s telecommunications monopoly in 1928 prompted another major change: Siedle turned toward manufacturing house and door intercom systems, a field that would become its defining specialization. The company experienced serious disruption in the 1930s and 1940s. A bankruptcy proceeding was opened against S. Siedle & Söhne Telefon- und Telegrafenwerke AG in 1935; the proceeding was lifted in December 1938 after confirmation of a composition, and continuation of the business was decided in March 1939. During the Second World War, Siedle produced field telephones, including the FF33. A major fire in the winter of 1941 destroyed almost all factory buildings, forcing the company to rent temporary premises around Furtwangen while continuing operations. Max Helmut Siedle took over the company’s leadership in 1951. From 1970, Horst Siedle, Max Helmut Siedle’s only son, led the business as managing director. The company’s later history included the development of a wider group of owner-associated businesses. Kunststoff- und Elektrotechnik GmbH was founded as a subsidiary in 1978, and the owner group also came to include Novotechnik, a sensor-technology business, and Contelec AG in Switzerland, which joined through the acquisition of a shareholding in 1986. The German Wikipedia account notes that these businesses are linked through their owners or shareholders and do not constitute a consolidated group in the legal sense. From 2000, Horst Siedle and his second wife, Gabriele Siedle, ran the company together. Gabriele became its sole leader in 2005. The company later continued under her leadership as a private, family-associated business. In June 2023, she handed over management to a three-person team: Jochen Cura, responsible for commercial affairs; Christoph Weber, responsible for technology; and Peter Strobel, responsible for market and innovation. In its current business, Siedle develops, manufactures and integrates building-communication devices and systems, with door and intercom communication at its core. Its product range extends to access control, mailboxes and other entrance-related technologies. Current website materials highlight Siedle IQ and its related offerings, IP-based systems, connected functions for property operators and cloud-enabled building management. Siedle says it celebrated its 275th anniversary in 2025. Its history reflects successive shifts from foundry production to telegraphy and telephony, then to house and door communication, while retaining its headquarters in Furtwangen.

• 2025

  275th anniversary

• 2023

  Management handed over to a three-person team

• 2022

  Moscow project production halted

• 2005

  Gabriele Siedle becomes sole leader

• 2000

  Horst and Gabriele Siedle lead the company together

• 1986

  Contelec shareholding acquired

• 1978

  Kunststoff- und Elektrotechnik GmbH established

• 1970

  Horst Siedle becomes managing director

• 1951

  Max Helmut Siedle takes the lead

• 1941

  Major fire in Furtwangen

• 1939

  Continuation of the business decided

• 1935

  Bankruptcy proceedings opened

• 1928

  Shift toward house and door intercoms

• 1900

  Telephone production begins

• 1885

  S. Siedle & Söhne name adopted

• 1870

  Factory built in Furtwangen

• 1750

  Foundry origins

A German specialist in building and door communication, emphasizing integrated systems, connected and IP-based functions, and products for both new construction and renovation.

• Siedle IQ

  A door-communication platform spanning services and devices, presented as a route to IP door communication.

• IQ Touch

  A door station expanding the Siedle IQ door-communication system, with additional functions and service options for operators of large residential properties.

• IQ 2wire

  An offering for digitizing door communication over two-wire cabling in new construction or renovation projects.

• Siedle Access

  An IP-based system for connected door communication, with releases supporting mobile concierge video functions and cross-site networking.

• Vixinity cloud

  A cloud-based surface combining Siedle door communication and access control with building-management functions.

• “Enter” — building communication for the future

• Halted production for a Moscow luxury-property projectOther

• Management successionOther

1. 1Hersteller von Sprechanlagen - Siedlesiedle.de
2. 2Newsletternewsletter.siedle.com
3. 3Siedlewikidata.org
4. 4Siedle (Unternehmen)de.wikipedia.org