Company lists · Data refreshed September 2026

Top 25 Window frame aluminum manufacturers based in Germany

Name: Window frame aluminum manufacturers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 657 companies tracked

RevenueBase identified 657 window frame aluminum manufacturers headquartered in Germany as of September 2026 and tracks 3,110 professional contacts across them, including 916 with verified work emails. Berlin is the largest hub.

This list covers window frame aluminum 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 19, 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 19, 2026 86% judged on-target in blind review

657Companies

3,110Contacts tracked

916Verified emails

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The 25 largest window frame aluminum manufacturers based in Germany

Ranked by team size

Top 25 of 657 window frame aluminum manufacturers based in Germany, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to window frame aluminum 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	Heroal	Strong evidence	Verl, GermanyHQ checked Sep 19, 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 19, 2026
2	Hueck System Gmbh & Co. KG	Partial evidence	Lüdenscheid, GermanyHQ checked Sep 19, 2026	201-500	89 contacts →
	Partial 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 19, 2026
3	Dobler Metallbau Gmbh	Indirect evidence	München, GermanyHQ checked Sep 19, 2026	201-500	87 contacts →
	Indirect evidence “The Dobler Metallbau Group is an international company.” Source: RevenueBase Database · checked Sep 19, 2026
4	Raico Bautechnik Gmbh	Strong evidence	Pfaffenhausen, GermanyHQ checked Sep 19, 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 19, 2026
5	Wicona	Partial evidence	Ulm, GermanyHQ checked Sep 19, 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 19, 2026
6	Gutmann Bausysteme Gmbh	Partial evidence	Weißenburg In Bayern, GermanyHQ checked Sep 19, 2026	201-500	57 contacts →
	Partial evidence “GUTMANN Bausysteme GmbH is an international supplier of system-based aluminium solutions for buildings.” Source: RevenueBase Database · checked Sep 19, 2026
7	Medicke	Indirect evidence	Glauchau, GermanyHQ checked Sep 19, 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 19, 2026
8	Unilux Gmbh	Indirect evidence	Salmtal, GermanyHQ checked Sep 19, 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 19, 2026
9	Ventana Deutschland Gmbh & Co. KG	Partial evidence	Vreden, GermanyHQ checked Sep 19, 2026	201-500	44 contacts →
	Partial evidence “As part of the Ventana Group, we are the world's leading specialist in the manufacturing of innovative shapes for vinyl windows and doors.” Source: RevenueBase Database · checked Sep 19, 2026
10	Feldhaus Fenster Fassaden Gmbh & Co. KG	Indirect evidence	Emsdetten, GermanyHQ checked Sep 19, 2026	201-500	43 contacts →
	Indirect evidence “FELDHAUS Fenster + Fassaden GmbH & Co.” Source: RevenueBase Database · checked Sep 19, 2026
11	Groke Türen Gmbh	Indirect evidence	Hagenbach, GermanyHQ checked Sep 19, 2026	51-200	40 contacts →
	Indirect evidence “Die Groke Türen GmbH in Hagenbach blickt bereits auf eine über 125-jährige Erfolgsgeschichte im Metallbau zurück.” Source: RevenueBase Database · checked Sep 19, 2026
12	Gebrüder Schneider Fensterfabrik Gmbh & Co.Kg	Indirect evidence	Stimpfach, GermanyHQ checked Sep 19, 2026	201-500	40 contacts →
	Indirect evidence “THE FACADE COMPANY - Wir als Gebrüder Schneider Fensterfabrik GmbH & Co.” Source: RevenueBase Database · checked Sep 19, 2026
13	Gayko Fenster-Türenwerk Gmbh	Indirect evidence	Wilnsdorf, GermanyHQ checked Sep 19, 2026	51-200	36 contacts →
	Indirect evidence “GAYKO Fenster-Türenwerk GmbH is a successful and innovative, constantly growing company that offers unique solutions for builders, renovators and architects.” Source: RevenueBase Database · checked Sep 19, 2026
14	Mejo Metall Josten Gmbh & Co. KG	Partial evidence	Düsseldorf, GermanyHQ checked Sep 19, 2026	51-200	35 contacts →
	Partial evidence “Die mejo Metall Josten Aluminium GmbH & Co.” Source: RevenueBase Database · checked Sep 19, 2026
15	Wigger Fenster Fassaden Gmbh	Indirect evidence	Rosendahl, GermanyHQ checked Sep 19, 2026	201-500	33 contacts →
	Indirect evidence “Wigger Fenster + Fassaden Persönlich.” Source: RevenueBase Database · checked Sep 19, 2026
16	Haga Metallbau Gmbh	Indirect evidence	Hofheim, GermanyHQ checked Sep 19, 2026	201-500	31 contacts →
	Indirect evidence “HAGA ist ein Handwerksunternehmen, das handwerkliches Know-how mit modernster Maschinentechnik und industrieller Prozessqualität verbindet.” Source: RevenueBase Database · checked Sep 19, 2026
17	ALU Group International	Partial evidence	Hamburg, GermanyHQ checked Sep 19, 2026	51-200	30 contacts →
	Partial evidence “For more than 35 years, Alu Group and its subsidiaries have been providing high end aluminum building solutions to residential and commercial clients around the Globe.” Source: RevenueBase Database · checked Sep 19, 2026
18	Gugelfuss Gmbh	Indirect evidence	Elchingen, GermanyHQ checked Sep 19, 2026	201-500	28 contacts →
	Indirect evidence “Wer sind wir?” Source: RevenueBase Database · checked Sep 19, 2026
19	Akotherm Gmbh	Strong evidence	Bendorf, GermanyHQ checked Sep 19, 2026	51-200	26 contacts →
	Strong evidence “AKOTHERM® GmbH has been established as an innovative system supplier for aluminum windows, doors, and facades on the German market and abroad for over 50 years.” Source: RevenueBase Database · checked Sep 19, 2026
20	Gerdes Gmbh	Partial evidence	Lengerich, GermanyHQ checked Sep 19, 2026	51-200	26 contacts →
	Partial evidence “We are your partner for custom-made windows, entrance doors, sliding doors, façades and fire protection doors.” Source: RevenueBase Database · checked Sep 19, 2026
21	Rupert APP Gmbh & CO	Indirect evidence	Leutkirch Im Allgäu, GermanyHQ checked Sep 19, 2026	201-500	26 contacts →
	Indirect evidence “Aus der im Jahre 1939 von Rupert App in Leutkirch gegründeten Schlosserei entwickelte sich ein leistungsfähiges Handwerksunternehmen mit drei modernen Fertigungsbetrieben.” Source: RevenueBase Database · checked Sep 19, 2026
22	Gartner Extrusion Gmbh	Partial evidence	Gundelfingen An Der Donau, GermanyHQ checked Sep 19, 2026	201-500	25 contacts →
	Partial evidence “Gartner Extrusion ist der Spezialist für hochwertige Aluminiumprofile – von der Schmelze über das Profil mit seinen verschiedensten Bearbeitungsformen bis zum fertigen Produkt…” Source: RevenueBase Database · checked Sep 19, 2026
23	TMP Fenster Türen Gmbh	Indirect evidence	Bad Langensalza, GermanyHQ checked Sep 19, 2026	201-500	24 contacts →
	Indirect evidence “TMP® ist Ihr kompetenter Partner für Fenster, Türen und Fassaden.” Source: RevenueBase Database · checked Sep 19, 2026
24	Wertbau Gmbh	Indirect evidence	Langenwetzendorf, GermanyHQ checked Sep 19, 2026	201-500	24 contacts →
	Indirect evidence “Als eines der führenden Unternehmen im Fenster- und Türenmarkt setzen wir mit unserer hochautomatisierten Produktion europäische Maßstäbe.” Source: RevenueBase Database · checked Sep 19, 2026
25	Baier Gmbh	Indirect evidence	Renchen-ulm, GermanyHQ checked Sep 19, 2026	51-200	21 contacts →
	Indirect evidence “Baier bewegt.” Source: RevenueBase Database · checked Sep 19, 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: window frame aluminum 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 window frame aluminum manufacturers.
Partial evidence: Its own public description names part of window frame aluminum manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name window frame aluminum 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 657 window frame aluminum manufacturers based in Germany

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Window frame aluminum manufacturers based in Germany at a glance

As of Sep 19, 2026

29.5%Verified-email coverage

4.7Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · Berlin

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

342

11-50

123

51-200

105

201-500

501-1,000

1,001-5,000

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 657 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 window frame aluminum 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 “window frame aluminum 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 window frame aluminum 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 window frame aluminum 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, 916 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 19, 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.

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 window frame aluminum 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 window frame aluminum manufacturers are there based in Germany?

RevenueBase identified 657 window frame aluminum 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?

Heroal, headquartered in Verl, tops this list with the largest team on record.

Which city has the most window frame aluminum manufacturers?

Berlin leads with 15 headquartered companies, followed by Monchengladbach (7) and Hamburg (6).

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 916 verified decision-maker contacts tracked across these 657 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 19, 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.