Company lists · Data refreshed October 2026

Top 10 Call center service providers based in Greece

Name: Call center service providers based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Oct 1, 2026 39 companies tracked

RevenueBase identified 39 company matches for call center service providers associated with Greece as of October 2026 and tracks 1,329 professional contacts across them, including 252 with verified work emails and 15 with mobile numbers. Athens is the largest hub.

This list covers company matches for call center service providers associated with Greece, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed October 1, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Oct 1, 2026 How this list was built

39Companies

1,329Contacts tracked

252Verified emails

15Mobile numbers

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The 10 largest call center service providers based in Greece

Ranked by team size

Top 10 of 39 company matches for call center service providers based in Greece, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 1, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Mellon Technologies	Exact match	Piraeus, GreeceHQ recorded Oct 1, 2026	1,001-5,000	340 contacts →
	Exact match “Mellon Technologies, the parent company of Mellon Group of Companies, was founded in 1994 in Athens, Greece.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
2	BFS Group	Exact match	Athens, GreeceHQ recorded Oct 1, 2026	501-1,000	76 contacts →
	Exact match “BFS Group was founded in 1994 after absorbing Centronet Company.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
3	Telecroft	Exact match	Athens, GreeceHQ recorded Oct 1, 2026	201-500	55 contacts →
	Exact match “Inbound, outbound, no boundaries” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
4	Icall Support & Growth Ι.Κ.Ε	Exact match	Kalamaki, GreeceHQ recorded Oct 1, 2026	201-500	34 contacts →
	Exact match “iCall is a fully devolped Contact Center, offering innovative Customer Relationship & Experience Management services, through advanced technological infrastructure and modern…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
5	Othisi SA	Exact match	Athens, GreeceHQ recorded Oct 1, 2026	201-500	32 contacts →
	Exact match “At OTHISI SA, we are redefining the future of customer engagement and business process outsourcing.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
6	Plegmanet	Exact match	Athens, GreeceHQ recorded Oct 1, 2026	201-500	23 contacts →
	Exact match “Η PlegmaNet δραστηριοποιείται στον χώρο των τηλεπικοινωνιακών υπηρεσιών από το ενώ από το 2010, τον Ιούνιο, αποτελεί ένα σύγχρονο τηλεφωνικό κέντρο, παρέχοντας ολοκληρωμένες…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
7	Teleraise	Exact match	GreeceHQ recorded Oct 1, 2026	51-200	18 contacts →
	Exact match “TELERAISE IKE is is an integrated Contact Center that offers customer relationship management, customer development and sales promotion services.” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
8	Beeasy Τηλεγραμματεία	Exact match	Thessaloniki, GreeceHQ recorded Oct 1, 2026	11-50	9 contacts →
	Exact match “Στην Τηλεγραμματεία beeasy oι επαγγελματίες γραμματείς- τηλεφωνητές μας βρίσκονται στο τηλεφωνικό κέντρο από Δευτέρα έως Παρασκευή και από 09.00 – 21.00, για να απαντήσουν τις…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
9	SK Group GR	Exact match	Thessaloniki, GreeceHQ recorded Oct 1, 2026	201-500	8 contacts →
	Exact match “ΥΠΗΡΕΣΙΕΣ ΓΙΑ ΕΤΑΙΡΕΙΕΣ Εξυπηρέτηση Πελατών (Customer Care)\| Τηλεφωνική Υποστήριξη (Help Desk)\| Υποστήριξη Διαφημιστικής Καμπάνιας \| Έρευνα Αγοράς \| Αξιολόγηση Προϊόντων &…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase
10	Hellascall	Exact match	Kallithéa, GreeceHQ recorded Oct 1, 2026	11-50	4 contacts →
	Exact match “Hellascall was founded with a strategic goal of rapid growth in the field of Customer Relationship Management and Development on behalf of banking institutions, telecommunications…” Recorded in the RevenueBase company graph · Oct 1, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “call center service providers”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 10 of 39 call center service providers based in Greece

See the full list, filter by size, metro and specialty, and access 252 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Call center service providers based in Greece at a glance

As of Oct 1, 2026

19.0%Verified-email coverage

1.1%Mobile-number coverage

34.1Average contacts per company

51-200Median size (employees)

20.5%Largest-city concentration · Athens

Oct 1, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 33.5d

430–30

20431–60

461–90

090–180

1180+

Company record updated

Median 97.0d

00–30

21731–60

28061–90

76190–180

71180+

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Greece whose business descriptions match “call center service providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 252 professional contacts with verified work emails across the full matched dataset. 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 October 1, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “call center service providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many call center service providers are there based in Greece?

RevenueBase identified 39 company matches for call center service providers associated with Greece as of October 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Mellon Technologies tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most call center service providers?

Athens leads with 8 company records, followed by Kalamaria (3) and Thessaloniki (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 252 professional contacts with verified work emails tracked across these 39 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on October 1, 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 SmartSearch, 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.