Company lists · Data verified August 2026

Top 25 Advertising agencies based in Greece

Name: Advertising agencies based in Greece
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 435 companies tracked

There are 435 advertising agencies headquartered in Greece (RevenueBase, August 2026). RevenueBase tracks 3,417 professional contacts across them, including 655 with verified work emails and 131 with mobile numbers. Athens is the largest hub.

This list covers advertising agencies 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.

435Companies

3,417Contacts tracked

655Verified emails

131Mobile numbers

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The 25 largest advertising agencies based in Greece

Ranked by team size

Top 25 of 435 advertising agencies 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	Ogilvy Greece	Athens	201-500	277	2
2	The Newtons Laboratory	Chalandri	51-200	114	65
3	Tempo OMD Hellas	Athens	51-200	100	35
4	SPC	Athens	51-200	90	15
5	Closer	Thessaloniki	51-200	89	31
6	Socialab	n/a	51-200	66	23
7	Solid Havas	n/a	51-200	59	48
8	Admine	n/a	51-200	55	22
9	Humble	n/a	51-200	47	19
10	UM Greece	Athens	51-200	44	34
11	WHY	n/a	11-50	44	23
12	Radical Communications	Athens	11-50	38	1
13	Adweb Digital HUB	Chalandri	11-50	34	11
14	Creace SA	n/a	11-50	32	1
15	Attp Advertising	Athens	11-50	31	16
16	BRAVE	n/a	11-50	29	15
17	Vitamin Media 360 Advertising Agency	Athens	11-50	29	9
18	MINDS	Thessaloniki	11-50	22	6
19	Publicis Groupe Greece	n/a	51-200	22	2
20	FMN	Alimos	11-50	21	3
21	FCB Gnomi	n/a	51-200	19	16
22	Viral Passion	Kifisia	11-50	17	2
23	K2 Design	n/a	11-50	15	2
24	Cicero Advertising	Athens	11-50	14	13
25	2yolk	Athens	11-50	14	2

Showing 25 of 435 advertising agencies based in Greece

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Advertising agencies based in Greece at a glance

As of Aug 28, 2026

1-10Median size (employees)

AthensLargest hub · 145 HQs

131Contacts with mobile numbers

2Emails re-verified in last 30 days

Companies by employee count

1-10

291

11-50

118

51-200

201-500

Advertising agencies by metro

Metro	Companies
Advertising agencies in Athens	145
Advertising agencies in Thessaloniki	21
Advertising agencies in Chalandri	8
Advertising agencies in Salonica	6
Advertising agencies in Attica	5
Advertising agencies in Patras	3
Advertising agencies in Piraeus	3

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 “advertising agencies”, 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; 2 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 advertising agencies are there based in Greece?

There are 435 advertising agencies headquartered in Greece as of August 2026 (RevenueBase).

What is the largest company on this list?

Ogilvy Greece, headquartered in Athens, tops this list with the largest team on record.

Which city has the most advertising agencies?

Athens leads with 145 headquartered companies, followed by Thessaloniki (21) and Chalandri (8).

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 655 verified decision-maker contacts tracked across these 435 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.