Company lists · Data verified August 2026

Top 10 Customer service outsourcing companies based in Greece

Name: Customer service outsourcing companies based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 35 companies tracked

There are 35 customer service outsourcing companies headquartered in Greece (RevenueBase, August 2026). RevenueBase tracks 1,262 professional contacts across them, including 253 with verified work emails and 16 with mobile numbers. Athens is the largest hub.

This list covers customer service outsourcing companies headquartered in Greece, 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.

35Companies

1,262Contacts tracked

253Verified emails

16Mobile numbers

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The 10 largest customer service outsourcing companies based in Greece

Ranked by team size

Top 10 of 35 customer service outsourcing companies based in Greece, 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	Mellon Technologies	n/a	1,001-5,000	331	110
2	Telecroft	n/a	201-500	54	13
3	Icall Support & Growth Ι.Κ.Ε	n/a	201-500	35	6
4	Othisi SA	Greece	201-500	31	2
5	Teleraise	n/a	51-200	18	3
6	DKG Telephone	n/a	51-200	13	1
7	Inss LTD	n/a	11-50	8	4
8	SK Group GR	Thessaloniki	201-500	7	2
9	Beeasy Τηλεγραμματεία	Thessaloniki	11-50	7	1
10	Hellascall	n/a	11-50	4	2

Showing 10 of 35 customer service outsourcing companies based in Greece

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Customer service outsourcing companies based in Greece at a glance

As of Aug 28, 2026

51-200Median size (employees)

AthensLargest hub · 6 HQs

16Contacts 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

1,001-5,000

5,001-10,000

Customer service outsourcing companies by metro

Metro	Companies
Customer service outsourcing companies in Athens	6
Customer service outsourcing companies in Thessaloniki	2
Customer service outsourcing companies in Greece	2
Customer service outsourcing companies in Kalamaria	2
Customer service outsourcing companies in Agios Dimitrios	1
Customer service outsourcing companies in Kallithea	1
Customer service outsourcing companies in Dimitrios	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 service outsourcing companies”, with match quality audited by blind human judging, and headquartered in Greece.
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 service outsourcing companies are there based in Greece?

There are 35 customer service outsourcing companies headquartered in Greece as of August 2026 (RevenueBase).

What is the largest company on this list?

Mellon Technologies, headquartered in Greece, tops this list with the largest team on record.

Which city has the most customer service outsourcing companies?

Athens leads with 6 headquartered companies, followed by Thessaloniki (2) and Greece (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 253 verified decision-maker contacts tracked across these 35 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.