Company lists · Data refreshed September 2026

Top 25 Glazing and window manufacturers based in Germany

Name: Glazing and window manufacturers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 16, 2026 1,385 companies tracked

RevenueBase identified 1,385 glazing and window manufacturers headquartered in Germany as of September 2026 and tracks 12,899 professional contacts across them, including 4,129 with verified work emails. Berlin is the largest hub.

This list covers glazing and window manufacturers headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 16, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 16, 2026 86% judged on-target in blind review

1,385Companies

12,899Contacts tracked

4,129Verified emails

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The 25 largest glazing and window manufacturers based in Germany

Ranked by team size

Top 25 of 1,385 glazing and window manufacturers based in Germany, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to glazing and window manufacturers: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Rehau Window Solutions	Partial evidence	Rehau, GermanyHQ checked Sep 16, 2026	10001+	4,158 contacts →
	Partial evidence “The REHAU Industries subgroup Window Solutions reinvents windows and doors every day.” Source: RevenueBase Database · checked Sep 16, 2026
2	Geze Gmbh	Partial evidence	Leonberg, GermanyHQ checked Sep 16, 2026	1,001-5,000	644 contacts →
	Partial evidence “Since 1863, GEZE has been operating as a successful, global family business offering products, system solutions and services for doors and windows.” Source: RevenueBase Database · checked Sep 16, 2026
3	Siegenia Group	Indirect evidence	57234, GermanyHQ checked Sep 16, 2026	1,001-5,000	399 contacts →
	Indirect evidence “Komplettangebot für Fenster und Türen Die SIEGENIA GRUPPE produziert und liefert ein umfassendes Portfolio an Produkten und Systemen, die Raumkomfort verleihen.” Source: RevenueBase Database · checked Sep 16, 2026
4	SEELE	Indirect evidence	Gersthofen, GermanyHQ checked Sep 16, 2026	501-1,000	333 contacts →
	Indirect evidence “seele is one of the world’s top companies specialising in the design and construction of façades and complex building envelopes made from glass, steel, aluminium, membranes and…” Source: RevenueBase Database · checked Sep 16, 2026
5	Aluplast Gmbh	Partial evidence	Karlsruhe, GermanyHQ checked Sep 16, 2026	1,001-5,000	213 contacts →
	Partial evidence “For over four decades, aluplast GmbH has stood for continuous development and commitment in the window industry.” Source: RevenueBase Database · checked Sep 16, 2026
6	Salamander Mywindow	Partial evidence	Türkheim/unterallgäu, GermanyHQ checked Sep 16, 2026	1,001-5,000	202 contacts →
	Partial evidence “Salamander Industrie-Produkte GmbH and its brand Salamander Window & Door Systems with headquarters in Türkheim/Unterallgäu is one of the leading European quality providers for…” Source: RevenueBase Database · checked Sep 16, 2026
7	Roto Window And Door Technology	Partial evidence	Leinfelden-echterdingen, GermanyHQ checked Sep 16, 2026	1,001-5,000	192 contacts →
	Partial evidence “The name Roto is known throughout the world for innovative, individual and secure fitting systems that increase the added value of windows and doors for people.” Source: RevenueBase Database · checked Sep 16, 2026
8	Roto Frank Dachsystem-Technologie	Indirect evidence	Bad Mergentheim, GermanyHQ checked Sep 16, 2026	1,001-5,000	192 contacts →
	Indirect evidence “Roto Frank Dachsystem-Technologie ist eine von drei Divisionen der Roto Frank Holding AG.” Source: RevenueBase Database · checked Sep 16, 2026
9	Heroal	Strong evidence	Verl, GermanyHQ checked Sep 16, 2026	501-1,000	186 contacts →
	Strong evidence “As a manufacturer of aluminium system solutions for roller shutters, sun protection, roller doors, windows, doors, sliding doors, curtain walls and patio roofs, heroal is one of…” Source: RevenueBase Database · checked Sep 16, 2026
10	Solarlux	Indirect evidence	Melle, GermanyHQ checked Sep 16, 2026	501-1,000	180 contacts →
	Indirect evidence “Das niedersächsische Familienunternehmen aus Bissendorf bei Osnabrück hat sich in fast 30 Jahren national und international einen Namen gemacht.” Source: RevenueBase Database · checked Sep 16, 2026
11	Heim & Haus	Indirect evidence	Duisburg, GermanyHQ checked Sep 16, 2026	1,001-5,000	148 contacts →
	Indirect evidence “HEIM & HAUS ist das führende Direktvertriebsunternehmen im Markt der Bauelemente.” Source: RevenueBase Database · checked Sep 16, 2026
12	AGC Interpane	Indirect evidence	Lauenförde, GermanyHQ checked Sep 16, 2026	1,001-5,000	142 contacts →
	Indirect evidence “AGC Interpane ist Teil von AGC Glass Europe und steht für leistungsstarke Glaslösungen für die Architektur und den Fensterbau.” Source: RevenueBase Database · checked Sep 16, 2026
13	Euroglas	Indirect evidence	Haldensleben, GermanyHQ checked Sep 16, 2026	501-1,000	106 contacts →
	Indirect evidence “For over 20 years, we have been burning for the unique material that is made of quartz sand, fire and energy.” Source: RevenueBase Database · checked Sep 16, 2026
14	Hueck System Gmbh & Co. KG	Indirect evidence	Lüdenscheid, GermanyHQ checked Sep 16, 2026	201-500	89 contacts →
	Indirect evidence “HUECK by Hydro ist ein Unternehmen der Hydro Building Systems und gehört zu den führenden Anbietern von Fenster, Türen- und Fassadensystemen aus Aluminium.” Source: RevenueBase Database · checked Sep 16, 2026
15	Dobler Metallbau Gmbh	Indirect evidence	München, GermanyHQ checked Sep 16, 2026	201-500	87 contacts →
	Indirect evidence “The Dobler Metallbau Group is an international company.” Source: RevenueBase Database · checked Sep 16, 2026
16	Raico Bautechnik Gmbh	Strong evidence	Pfaffenhausen, GermanyHQ checked Sep 16, 2026	51-200	84 contacts →
	Strong evidence “RAICO Bautechnik GmbH develops and distributes high-quality glazing systems for curtain walling, aluminium windows, and aluminium doors.” Source: RevenueBase Database · checked Sep 16, 2026
17	Wicona	Partial evidence	Ulm, GermanyHQ checked Sep 16, 2026	501-1,000	82 contacts →
	Partial evidence “WICONA by Hydro offers with over 70 years’ experience functional and energy-efficient façades, windows, door and sliding solutions with the highest quality and performance…” Source: RevenueBase Database · checked Sep 16, 2026
18	Dorma-Glas Gmbh	Indirect evidence	Bad Salzuflen, GermanyHQ checked Sep 16, 2026	201-500	80 contacts →
	Indirect evidence “For over 40 years, DORMA-Glas GmbH has been developing and manufacturing high-quality hardware and systems specifically for use on glass.” Source: RevenueBase Database · checked Sep 16, 2026
19	Beck Heun Gmbh	Indirect evidence	Mengerskirchen, GermanyHQ checked Sep 16, 2026	501-1,000	61 contacts →
	Indirect evidence “Beck+Heun ist Entwickler, Hersteller und Verarbeiter von energetisch hocheffizienten Systemen rund um das Fenster.” Source: RevenueBase Database · checked Sep 16, 2026
20	Gutmann Bausysteme Gmbh	Indirect evidence	Weißenburg In Bayern, GermanyHQ checked Sep 16, 2026	201-500	57 contacts →
	Indirect evidence “GUTMANN Bausysteme GmbH is an international supplier of system-based aluminium solutions for buildings.” Source: RevenueBase Database · checked Sep 16, 2026
21	GU Automatic Gmbh	Indirect evidence	Rietberg, GermanyHQ checked Sep 16, 2026	201-500	56 contacts →
	Indirect evidence “GU Automatic GmbH hat sich zu einem der führenden Anbieter von anspruchsvollen automatischen Eingangssystemen, Glas-Schiebewänden und Lösungen zur Personenvereinzelung entwickelt.” Source: RevenueBase Database · checked Sep 16, 2026
22	Aumüller Aumatic Gmbh	Strong evidence	Thierhaupten, GermanyHQ checked Sep 16, 2026	51-200	50 contacts →
	Strong evidence “Over 45 years of experience have made us one of the world's leading manufacturers of windows automation.” Source: RevenueBase Database · checked Sep 16, 2026
23	Medicke	Indirect evidence	Glauchau, GermanyHQ checked Sep 16, 2026	201-500	49 contacts →
	Indirect evidence “Die Medicke GmbH mit Hauptsitz in Glauchau und Niederlassungen in Berlin, Borna, Hamburg und Leipzig beschäftigt 330 Mitarbeiter:innen.” Source: RevenueBase Database · checked Sep 16, 2026
24	Hautau Gmbh	Indirect evidence	Helpsen, GermanyHQ checked Sep 16, 2026	201-500	49 contacts →
	Indirect evidence “HAUTAU ist einer der weltweit führenden Spezialisten für Schiebetechnik und Automation rund um das Fenster.” Source: RevenueBase Database · checked Sep 16, 2026
25	Unilux Gmbh	Indirect evidence	Salmtal, GermanyHQ checked Sep 16, 2026	201-500	47 contacts →
	Indirect evidence “Die Unilux GmbH ist ein mittelständiges und eigenständiges Unternehmen mit über 300 Mitarbeitern am Standort Salmtal.” Source: RevenueBase Database · checked Sep 16, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: glazing and window manufacturers. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names glazing and window manufacturers.
Partial evidence: Its own public description names part of glazing and window manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name glazing and window manufacturers. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 1,385 glazing and window manufacturers based in Germany

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Glazing and window manufacturers based in Germany at a glance

As of Sep 16, 2026

32.0%Verified-email coverage

9.3Average contacts per company

1-10Median size (employees)

2.4%Largest-city concentration · Berlin

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

738

11-50

255

51-200

164

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for Germany, so it is reported there. Company counts and contact totals on this page are exact for Germany, over 1,385 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among glazing and window manufacturers, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in Germany whose own description of what they do matches “glazing and window manufacturers”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names glazing and window manufacturers), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among glazing and window manufacturers, and records with no verified work email. Companies headquartered outside Germany are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 4,129 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 16, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Glazing and window manufacturers by metro

Glazing and window manufacturers in Berlin33

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names glazing and window manufacturers, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many glazing and window manufacturers are there based in Germany?

RevenueBase identified 1,385 glazing and window manufacturers headquartered in Germany as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Rehau Window Solutions, headquartered in Rehau, tops this list with the largest team on record.

Which city has the most glazing and window manufacturers?

Berlin leads with 33 headquartered companies, followed by Hamburg (17) and Dortmund (12).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,129 verified decision-maker contacts tracked across these 1,385 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 16, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.