Company lists · Data verified August 2026

Top 15 Customer retention call centers based in Germany

Name: Customer retention call centers based in Germany
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 46 companies tracked

There are 46 customer retention call centers headquartered in Germany (RevenueBase, August 2026). RevenueBase tracks 398 professional contacts across them, including 62 with verified work emails and 3 with mobile numbers. Berlin is the largest hub.

This list covers customer retention call centers headquartered in Germany, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

46Companies

398Contacts tracked

62Verified emails

3Mobile numbers

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The 15 largest customer retention call centers based in Germany

Ranked by team size

Top 15 of 46 customer retention call centers based in Germany, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Cho-Time Gmbh	Monchengladbach	501-1,000	75	24
2	Teleteam Call-Center UND Service Gmbh	Oldenburg Oldb.	201-500	38	5
3	Voxpark Gmbh	Berlin	51-200	26	2
4	Communicall Gmbh	Bayreuth	51-200	23	2
5	Loyaltyeffect Gmbh	Unterfohring	51-200	21	6
6	Care4as Gmbh	Flensburg	201-500	21	2
7	EUA Euro Union Assistance Gmbh	Stuttgart	51-200	14	3
8	Termitel Gmbh	Ettlingen	11-50	9	4
9	Opti-Serv Unternehmensberatung FÜR Servicemanagement Gmbh	Bruchsal	11-50	6	3
10	Makotel Gmbh	Sondershausen	51-200	6	2
11	Syncadvice Gmbh	Dusseldorf	1-10	6	1
12	Sales Elevator Communications Gmbh	Buchholz	11-50	5	3
13	Posern Connect Gmbh	Zeven	11-50	3	3
14	Tele PRO Connect	Stuttgart	1-10	2	1
15	Oui'sales Gmbh	Essen	1-10	2	1

Showing 15 of 46 customer retention call centers based in Germany

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Customer retention call centers based in Germany at a glance

As of Aug 28, 2026

11-50Median size (employees)

BerlinLargest hub · 4 HQs

3Contacts with mobile numbers

0Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Customer retention call centers by metro

Metro	Companies
Customer retention call centers in Berlin	4
Customer retention call centers in Stuttgart	3
Customer retention call centers in Dusseldorf	3
Customer retention call centers in Koln	2
Customer retention call centers in Essen	2
Customer retention call centers in Geilenkirchen	1
Customer retention call centers in Ulm	1

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “customer retention call centers”, with match quality audited by blind human judging, and headquartered in Germany.
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: Contact records re-verify on a rolling cadence; 0 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many customer retention call centers are there based in Germany?

There are 46 customer retention call centers headquartered in Germany as of August 2026 (RevenueBase).

What is the largest company on this list?

Cho-Time Gmbh, headquartered in Monchengladbach, tops this list with the largest team on record.

Which city has the most customer retention call centers?

Berlin leads with 4 headquartered companies, followed by Stuttgart (3) and Dusseldorf (3).

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 62 verified decision-maker contacts tracked across these 46 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.