Company lists · Data refreshed September 2026

Top 25 Legacy system modernization firms based in Germany

Name: Legacy system modernization firms based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 1,320 companies tracked

RevenueBase identified 1,320 legacy system modernization firms headquartered in Germany as of September 2026 and tracks 48,970 professional contacts across them, including 18,535 with verified work emails. Hamburg is the largest hub.

This list covers legacy system modernization firms 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 20, 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 20, 2026 86% judged on-target in blind review

1,320Companies

48,970Contacts tracked

18,535Verified emails

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The 25 largest legacy system modernization firms based in Germany

Ranked by team size

Top 25 of 1,320 legacy system modernization firms based in Germany, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to legacy system modernization firms: 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	T-Systems International	Partial evidence	Frankfurt Am Main, GermanyHQ checked Sep 20, 2026	10001+	10,154 contacts →
	Partial evidence “Your digitalization partner with industry expertise With locations in more than 26 countries and over employees (2024), T-Systems is one of the leading providers of digital…” Source: RevenueBase Database · checked Sep 20, 2026
2	Software AG	Indirect evidence	Darmstadt, GermanyHQ checked Sep 20, 2026	n/a	4,127 contacts →
	Indirect evidence “Software AG has been helping enterprises run and evolve their core business applications for over 50 years.” Source: RevenueBase Database · checked Sep 20, 2026
3	Arvato Systems	Partial evidence	Gütersloh, GermanyHQ checked Sep 20, 2026	1,001-5,000	2,537 contacts →
	Partial evidence “We are Arvato Systems - and we live digitalization.” Source: RevenueBase Database · checked Sep 20, 2026
4	Valantic	Indirect evidence	80801, GermanyHQ checked Sep 20, 2026	1,001-5,000	1,271 contacts →
	Indirect evidence “About valantic valantic is one of the fastest growing digital solutions, consulting, and software companies on the market.” Source: RevenueBase Database · checked Sep 20, 2026
5	Diconium	Indirect evidence	Stuttgart, GermanyHQ checked Sep 20, 2026	1,001-5,000	1,211 contacts →
	Indirect evidence “Diconium is a digital business transformation partner with a global footprint.” Source: RevenueBase Database · checked Sep 20, 2026
6	Materna	Indirect evidence	Dortmund, GermanyHQ checked Sep 20, 2026	1,001-5,000	1,196 contacts →
	Indirect evidence “Als international erfolgreicher IT-Dienstleister beraten und begleiten wir Unternehmen und Behörden in allen Belangen der Digitalisierung.” Source: RevenueBase Database · checked Sep 20, 2026
7	Umlaut Company	Indirect evidence	Aachen, GermanyHQ checked Sep 20, 2026	1,001-5,000	1,195 contacts →
	Indirect evidence “Accenture is a leading global professional services company that helps the world’s leading businesses, governments and other organizations build their digital core, optimize their…” Source: RevenueBase Database · checked Sep 20, 2026
8	NETGO	Indirect evidence	Berlin, GermanyHQ checked Sep 20, 2026	1,001-5,000	957 contacts →
	Indirect evidence “netgo entwickelt Strategien und Lösungen, die Menschen und ihr Business erfolgreich machen.” Source: RevenueBase Database · checked Sep 20, 2026
9	BCG Platinion	Indirect evidence	Cologne, GermanyHQ checked Sep 20, 2026	1,001-5,000	925 contacts →
	Indirect evidence “At BCG Platinion, we leverage our expertise alongside the unique experiences of our teams to accelerate digital transformations for our clients.” Source: RevenueBase Database · checked Sep 20, 2026
10	CONET	Indirect evidence	Bonn, GermanyHQ checked Sep 20, 2026	1,001-5,000	718 contacts →
	Indirect evidence “Leading forward: conet is the reliable digitalization partner for public administration, the defense sector, and companies in the automotive, finance & insurance, energy &…” Source: RevenueBase Database · checked Sep 20, 2026
11	Metafinanz	Indirect evidence	Munich, GermanyHQ checked Sep 20, 2026	501-1,000	673 contacts →
	Indirect evidence “For over 35 years, metafinanz Informationssysteme GmbH, a business and IT consulting company, has been at the side of its customers in an increasingly digital and dynamic world.” Source: RevenueBase Database · checked Sep 20, 2026
12	Cloudflight	Indirect evidence	Munich, GermanyHQ checked Sep 20, 2026	501-1,000	608 contacts →
	Indirect evidence “Cloudflight is one of the leading full-service providers in the field of industrial digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
13	SAM Solutions	Indirect evidence	Gilching, GermanyHQ checked Sep 20, 2026	501-1,000	563 contacts →
	Indirect evidence “Welcome to SaM Solutions – a software development company that drives digital transformation with the help of its international team of seasoned engineers and best-in-class…” Source: RevenueBase Database · checked Sep 20, 2026
14	Softwareone Deutschland Gmbh	Indirect evidence	Leipzig, GermanyHQ checked Sep 20, 2026	10001+	429 contacts →
	Indirect evidence “SoftwareOne is redefining how companies build, buy and manage everything in the cloud.” Source: RevenueBase Database · checked Sep 20, 2026
15	Natuvion	Indirect evidence	Walldorf, GermanyHQ checked Sep 20, 2026	501-1,000	415 contacts →
	Indirect evidence “Natuvion is a digital moving company.” Source: RevenueBase Database · checked Sep 20, 2026
16	Iteratec	Indirect evidence	München, GermanyHQ checked Sep 20, 2026	201-500	404 contacts →
	Indirect evidence “With more than successful projects, iteratec is one of the leading experts for digital product innovation, software and architecture development, and digital infrastructures.” Source: RevenueBase Database · checked Sep 20, 2026
17	Qvest Global	Indirect evidence	Köln, GermanyHQ checked Sep 20, 2026	1,001-5,000	357 contacts →
	Indirect evidence “Qvest is a global leader in media-focused practices and services.” Source: RevenueBase Database · checked Sep 20, 2026
18	Inovex	Indirect evidence	Karlsruhe, GermanyHQ checked Sep 20, 2026	201-500	347 contacts →
	Indirect evidence “inovex is an IT project house with a focus on digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
19	Syntax Systems Deutschland	Indirect evidence	Weinheim, GermanyHQ checked Sep 20, 2026	501-1,000	321 contacts →
	Indirect evidence “Syntax is a leading global IT services provider that empowers businesses – especially in the industrial midmarket – to drive their digital transformation.” Source: RevenueBase Database · checked Sep 20, 2026
20	Timetoact Group	Indirect evidence	Köln, GermanyHQ checked Sep 20, 2026	1,001-5,000	303 contacts →
	Indirect evidence “Die TIMETOACT GROUP ist ein führender IT-Dienstleister, der sich auf Cloud-Plattformen und digitale Lösungen für Enterprise Customers, Fortune und Kunden aus dem öffentlichen…” Source: RevenueBase Database · checked Sep 20, 2026
21	Adex Partners	Indirect evidence	Munich, GermanyHQ checked Sep 20, 2026	201-500	247 contacts →
	Indirect evidence “As a Trusted Advisor for digital transformation and IT strategy, AdEx Partners empowers leading organizations to shape the digital future of Europe.” Source: RevenueBase Database · checked Sep 20, 2026
22	Profi Engineering Systems AG	Indirect evidence	Darmstadt, GermanyHQ checked Sep 20, 2026	201-500	242 contacts →
	Indirect evidence “We are a German medium-sized, owner-run and financially strong IT solution house with its headquarters in Darmstadt.” Source: RevenueBase Database · checked Sep 20, 2026
23	T.Con Gmbh & Co. KG	Partial evidence	Plattling, GermanyHQ checked Sep 20, 2026	201-500	240 contacts →
	Partial evidence “Passionate about SAP – for over 20 years We are SAP experts, process pros, system-savvy, and industry specialists.” Source: RevenueBase Database · checked Sep 20, 2026
24	Kramer & Crew Gmbh & Co. KG	Indirect evidence	Köln, GermanyHQ checked Sep 20, 2026	201-500	218 contacts →
	Indirect evidence “IT Direction for Digital Transformation Founded by Uwe Kramer in 1992, Kramer & Crew is the IT Director of Digital Transformation.” Source: RevenueBase Database · checked Sep 20, 2026
25	Luxoft Germany	Indirect evidence	Leinfelden-echterdingen, GermanyHQ checked Sep 20, 2026	10001+	209 contacts →
	Indirect evidence “Luxoft, a DXC Technology Company (NYSE: DXC), is a digital strategy and software engineering firm providing bespoke technology solutions that drive business change for customers…” Source: RevenueBase Database · checked Sep 20, 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: legacy system modernization firms. 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 legacy system modernization firms.
Partial evidence: Its own public description names part of legacy system modernization firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name legacy system modernization firms. 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 1,320 legacy system modernization firms based in Germany

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Legacy system modernization firms based in Germany at a glance

As of Sep 20, 2026

37.8%Verified-email coverage

37.1Average contacts per company

1-10Median size (employees)

6.7%Largest-city concentration · Hamburg

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

687

11-50

405

51-200

143

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 1,320 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 legacy system modernization firms, 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 “legacy system modernization firms”. 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 legacy system modernization firms), 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 legacy system modernization firms, 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, 18,535 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 20, 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.

Legacy system modernization firms by metro

Legacy system modernization firms in Hamburg89
Legacy system modernization firms in Berlin82
Legacy system modernization firms in Munchen45
Legacy system modernization firms in Dusseldorf34
Legacy system modernization firms in Munich34
Legacy system modernization firms in Stuttgart30
Legacy system modernization firms in Koln27

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 legacy system modernization firms, 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 legacy system modernization firms are there based in Germany?

RevenueBase identified 1,320 legacy system modernization firms 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?

T-Systems International, headquartered in Frankfurt Am Main, tops this list with the largest team on record.

Which city has the most legacy system modernization firms?

Hamburg leads with 89 headquartered companies, followed by Berlin (82) and Munchen (45).

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 18,535 verified decision-maker contacts tracked across these 1,320 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 20, 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.