Company lists · Data refreshed September 2026

Top 25 Optical fiber manufacturers based in Germany

Name: Optical fiber manufacturers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 87 companies tracked

RevenueBase identified 87 optical fiber manufacturers headquartered in Germany as of September 2026 and tracks 1,206 professional contacts across them, including 562 with verified work emails. Berlin is the largest hub.

This list covers optical fiber 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 17, 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 17, 2026 86% judged on-target in blind review

87Companies

1,206Contacts tracked

562Verified emails

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The 25 largest optical fiber manufacturers based in Germany

Ranked by team size

Top 25 of 87 optical fiber manufacturers based in Germany, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to optical fiber 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	M-Net Telekommunikations Gmbh	Indirect evidence	München, GermanyHQ checked Sep 17, 2026	501-1,000	443 contacts →
	Indirect evidence “Als führender Glasfaseranbieter Bayerns verbindet M-net seit 1996 Menschen und Unternehmen in Bayern, im Großraum Ulm und im hessischen Main-Kinzig-Kreis mit zuverlässiger…” Source: RevenueBase Database · checked Sep 17, 2026
2	Rosenberger-Osi Gmbh & Co. OHG	Strong evidence	Augsburg, GermanyHQ checked Sep 17, 2026	501-1,000	125 contacts →
	Strong evidence “Since 1991, Rosenberger Optical Solutions & Infrastructure (Rosenberger OSI) has been a recognized expert for fiber-based connectivity, cabling solutions and infrastructure…” Source: RevenueBase Database · checked Sep 17, 2026
3	Kerpen Datacom Gmbh	Indirect evidence	Stolberg, GermanyHQ checked Sep 17, 2026	51-200	57 contacts →
	Indirect evidence “For over 100 years,"KERPEN" has stood for the highest cable quality made in Germany.” Source: RevenueBase Database · checked Sep 17, 2026
4	Microsens Gmbh & Co. KG	Strong evidence	Hamm, GermanyHQ checked Sep 17, 2026	51-200	45 contacts →
	Strong evidence “MICROSENS is one of the world’s leading manufacturers of fiber optic transmission systems.” Source: RevenueBase Database · checked Sep 17, 2026
5	Rosenberger Hochfrequenztechnik Gmbh	Partial evidence	Fridolfing, GermanyHQ checked Sep 17, 2026	1,001-5,000	34 contacts →
	Partial evidence “As a renowned manufacturer, the name Rosenberger is associated with the most advanced technology, quality and creativity.” Source: RevenueBase Database · checked Sep 17, 2026
6	Opternus	Indirect evidence	Bargteheide, GermanyHQ checked Sep 17, 2026	51-200	33 contacts →
	Indirect evidence “Die Opternus GmbH ist Marktführer in Deutschland im Bereich der Glasfaser Spleiss, Einblass- und Messtechnik für den Breitbandausbau – TECHNIK DIE VERBINDET.” Source: RevenueBase Database · checked Sep 17, 2026
7	Huber Suhner Cube Optics AG	Strong evidence	Mainz, GermanyHQ checked Sep 17, 2026	51-200	28 contacts →
	Strong evidence “HUBER+SUHNER Cube Optics; Pushing the boundaries of fiber optical transport for more than 20 years Fiber optical transport is the backbone of the global data transmission.” Source: RevenueBase Database · checked Sep 17, 2026
8	2locate Gmbh	Indirect evidence	Bad Nauheim, GermanyHQ checked Sep 17, 2026	51-200	24 contacts →
	Indirect evidence “Die 2locate GmbH ist mit ihren rund 180 festangestellten Mitarbeiterinnen und Mitarbeitern als 100%ige Tochter der GVG Glasfaser GmbH ein namhafter Arbeitgeber auf dem Markt des…” Source: RevenueBase Database · checked Sep 17, 2026
9	Foc- Fibre Optical Components Gmbh	Partial evidence	Berlin, GermanyHQ checked Sep 17, 2026	11-50	22 contacts →
	Partial evidence “Willkommen bei der FOC - fibre optical components GmbH!” Source: RevenueBase Database · checked Sep 17, 2026
10	J-Fiber Gmbh	Strong evidence	Jena, GermanyHQ checked Sep 17, 2026	51-200	21 contacts →
	Strong evidence “j-fiber GmbH is one of Europe’s leading providers of optical fibers for data transmission and the only industrial-scale manufacturer of fibers in Germany.” Source: RevenueBase Database · checked Sep 17, 2026
11	Kabelwerk Rhenania Gmbh	Indirect evidence	Aachen, GermanyHQ checked Sep 17, 2026	11-50	17 contacts →
	Indirect evidence “Since 1921, we operate as a subsidiary of Kabelwerk Eupen AG in the development and production of cables and wires in Aachen.” Source: RevenueBase Database · checked Sep 17, 2026
12	Sental Export Gmbh	Indirect evidence	Hamburg, GermanyHQ checked Sep 17, 2026	11-50	17 contacts →
	Indirect evidence “Reliable speed - stable connection.” Source: RevenueBase Database · checked Sep 17, 2026
13	Lwl-Sachsenkabel Gmbh	Strong evidence	Gornsdorf, GermanyHQ checked Sep 17, 2026	51-200	15 contacts →
	Strong evidence “LWL-Sachsenkabel GmbH, based in Germany, is a leading provider of fiber optic-based infrastructure solutions, cabling systems and services.” Source: RevenueBase Database · checked Sep 17, 2026
14	ART Photonics Gmbh	Strong evidence	Berlin, GermanyHQ checked Sep 17, 2026	11-50	15 contacts →
	Strong evidence “art photonics GmbH – the world's leading manufacturer and supplier for optical fiber solutions of a broad spectral range (from 180 nm to 18 µm) for OEM market.” Source: RevenueBase Database · checked Sep 17, 2026
15	Hauff-Technik Gridcom Gmbh	Indirect evidence	Rosenberg, GermanyHQ checked Sep 17, 2026	51-200	15 contacts →
	Indirect evidence “Hauff-Technik GRIDCOM ist ein in 2016 gegründetes Joint Venture aus dem Gründerunternehmen ZweiCom und dem Dichtungsspezialisten Hauff-Technik.” Source: RevenueBase Database · checked Sep 17, 2026
16	Amphenol AOP	Strong evidence	Berlin, GermanyHQ checked Sep 17, 2026	11-50	12 contacts →
	Strong evidence “Amphenol Active Optics Products is a leading manufacturer of fiber optics transceivers.” Source: RevenueBase Database · checked Sep 17, 2026
17	Abatec Gmbh	Indirect evidence	Billerbeck, GermanyHQ checked Sep 17, 2026	11-50	10 contacts →
	Indirect evidence “IHR SPEZIALIST FÜR LWL-KABEL MIT LICHTGESCHWINDIGKEIT IN DIE ZUKUNFT!” Source: RevenueBase Database · checked Sep 17, 2026
18	Engionic Group	Strong evidence	Berlin, GermanyHQ checked Sep 17, 2026	11-50	9 contacts →
	Strong evidence “The engionic group with its companies engionic Femto Gratings GmbH, engionic Fiber Optics GmbH and engionic CNC GmbH is a leading provider in the fiber optics market.” Source: RevenueBase Database · checked Sep 17, 2026
19	Fs.com Deutschland	Indirect evidence	Karlsfeld, GermanyHQ checked Sep 17, 2026	51-200	9 contacts →
	Indirect evidence “FS ist ein professioneller Anbieter von Kommunikations- und Hochgeschwindigkeitsnetzwerk-Systemlösungen für Netzwerk, Rechenzentrums- und Telekommunikationskunden mit der Vision…” Source: RevenueBase Database · checked Sep 17, 2026
20	Netcom-Tec Gmbh	Indirect evidence	Dürnau, GermanyHQ checked Sep 17, 2026	1-10	8 contacts →
	Indirect evidence “Die Netcom-Tec GmbH ist eine führende Anbieterin für passive Glasfaser-Infrastrukturen in Deutschland und Distributionspartner der Fa.” Source: RevenueBase Database · checked Sep 17, 2026
21	Diamond Gmbh	Indirect evidence	Leinfelden-echterdingen, GermanyHQ checked Sep 17, 2026	11-50	8 contacts →
	Indirect evidence “DIAMOND entwickelte sich maßvoll und vernünftig: Die Firmengründung erfolgte im Jahre 1958 mit dem Schwerpunkt auf Bearbeitung ultra-harter Materialien und industriell…” Source: RevenueBase Database · checked Sep 17, 2026
22	Advanced Fiber Tools Gmbh	Strong evidence	Mittweida, GermanyHQ checked Sep 17, 2026	51-200	7 contacts →
	Strong evidence “advanced fiber tools is your specialist for innovative solutions in fiber optic technology.” Source: RevenueBase Database · checked Sep 17, 2026
23	Wires & Bytes	Strong evidence	Berlin, GermanyHQ checked Sep 17, 2026	11-50	7 contacts →
	Strong evidence “Wires & Bytes was founded in 2019 in Berlin by industry experts to cater the growing need to design, develop and manufacture state of the art specialty fiber optic cables.” Source: RevenueBase Database · checked Sep 17, 2026
24	Fibre2eu Gmbh	Strong evidence	Munich, GermanyHQ checked Sep 17, 2026	1-10	5 contacts →
	Strong evidence “Located at Am Moosfeld 13, 81829 Munich, Fibre2EU delivers cost-effective and high-quality solutions to the fiber-optic market.” Source: RevenueBase Database · checked Sep 17, 2026
25	Iv.Sys Gmbh	Strong evidence	Unna, GermanyHQ checked Sep 17, 2026	11-50	4 contacts →
	Strong evidence “iv.sys GmbH – Your Partner for High-Quality Network & Fiber Optic Infrastructure We create connections: as a wholesaler, developer, and service provider in the field of copper and…” Source: RevenueBase Database · checked Sep 17, 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: optical fiber 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 optical fiber manufacturers.
Partial evidence: Its own public description names part of optical fiber manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name optical fiber 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 87 optical fiber manufacturers based in Germany

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Optical fiber manufacturers based in Germany at a glance

As of Sep 17, 2026

46.6%Verified-email coverage

13.9Average contacts per company

11-50Median size (employees)

8.0%Largest-city concentration · Berlin

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

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 87 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 optical fiber 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 “optical fiber 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 optical fiber 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 optical fiber 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, 562 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 17, 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 optical fiber 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 optical fiber manufacturers are there based in Germany?

RevenueBase identified 87 optical fiber 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?

M-Net Telekommunikations Gmbh, headquartered in Munchen, tops this list with the largest team on record.

Which city has the most optical fiber manufacturers?

Berlin leads with 7 headquartered companies, followed by Hamburg (4) and Augsburg (2).

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 562 verified decision-maker contacts tracked across these 87 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 17, 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.