Company lists · Data refreshed September 2026

Top 25 Big six advertising agencies based in Greece

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

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 238 companies tracked

RevenueBase identified 238 big six advertising agencies headquartered in Greece as of September 2026 and tracks 2,887 professional contacts across them, including 633 with verified work emails and 107 with mobile numbers. Athens is the largest hub.

This list covers big six advertising agencies headquartered in Greece, 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 23, 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 23, 2026 86% judged on-target in blind review

238Companies

2,887Contacts tracked

633Verified emails

107Mobile numbers

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The 25 largest big six advertising agencies based in Greece

Ranked by team size

Top 25 of 238 big six advertising agencies based in Greece, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to big six advertising agencies: 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	Ogilvy Greece	Partial evidence	Gerakas, GreeceHQ checked Sep 23, 2026	201-500	276 contacts →
	Partial evidence “Ogilvy Greece is a group of 400 professionals passionate about advertising, public relations, technology and social platforms.” Source: RevenueBase Database · checked Sep 23, 2026
2	MSPS	Indirect evidence	Alimos, GreeceHQ checked Sep 23, 2026	201-500	180 contacts →
	Indirect evidence “MSPS is an award-winning Integrated Marketing and Sales Services Agency that consists of talented, fun and creative individuals.” Source: RevenueBase Database · checked Sep 23, 2026
3	The Newtons Laboratory	Indirect evidence	Chalandri, GreeceHQ checked Sep 23, 2026	51-200	114 contacts →
	Indirect evidence “Clients are tired of fighting on their own, we fight with them." We are the Newtons Laboratory because we stand for: Creativity, Fresh ideas, Innovative thinking, Passion for…” Source: RevenueBase Database · checked Sep 23, 2026
4	Tempo OMD Hellas	Indirect evidence	Athens, GreeceHQ checked Sep 23, 2026	51-200	102 contacts →
	Indirect evidence “Tempo OMD Hellas is part of OMD network, the world’s largest media agency people, in over 120 offices.” Source: RevenueBase Database · checked Sep 23, 2026
5	SPC	Indirect evidence	Athens, GreeceHQ checked Sep 23, 2026	51-200	89 contacts →
	Indirect evidence “SPC, The Brand Lever is the company that created and consolidated the field of sales promotion in Greece.” Source: RevenueBase Database · checked Sep 23, 2026
6	Socialab	Partial evidence	Athens, GreeceHQ checked Sep 23, 2026	51-200	66 contacts →
	Partial evidence “Socialab is a digital-first advertising agency based in Athens, Greece.” Source: RevenueBase Database · checked Sep 23, 2026
7	Mccann Greece	Indirect evidence	Halandri, GreeceHQ checked Sep 23, 2026	51-200	62 contacts →
	Indirect evidence “We build brands that move people and markets through the radical creativity of Truth Well ToldTM.” Source: RevenueBase Database · checked Sep 23, 2026
8	Solid Havas	Partial evidence	Marousi, GreeceHQ checked Sep 23, 2026	51-200	59 contacts →
	Partial evidence “Solid Havas is an independent 360o communication agency offering its clients fully integrated effective solutions through Advertising, PR, Digital, BTL and CSR services.” Source: RevenueBase Database · checked Sep 23, 2026
9	Admine	Indirect evidence	Thessaloniki, GreeceHQ checked Sep 23, 2026	51-200	55 contacts →
	Indirect evidence “Admine is a leading communications agency with strong digital DNA, manned by a group of mad-men & mad-women all bridging consumers and brands using cutting edge communication…” Source: RevenueBase Database · checked Sep 23, 2026
10	UM Greece	Indirect evidence	Halandri, GreeceHQ checked Sep 23, 2026	51-200	44 contacts →
	Indirect evidence “Our people-first approach creates limitless possibilities, making everything we do intelligently driven, diversely courageous, business- and brand-obsessed, and dedicated to…” Source: RevenueBase Database · checked Sep 23, 2026
11	Radical Communications	Indirect evidence	Agios Dimitrios, GreeceHQ checked Sep 23, 2026	11-50	38 contacts →
	Indirect evidence “Radical Communications SA is an award-winning 360 marketing and communications agency, headquartered in Athens.” Source: RevenueBase Database · checked Sep 23, 2026
12	Interweave	Indirect evidence	Athens, GreeceHQ checked Sep 23, 2026	11-50	35 contacts →
	Indirect evidence “INTERWEAVE: Rebels in Business - Consulting \| Creative \| Technology We are an ideas and innovation company with technology and insights at our heart.” Source: RevenueBase Database · checked Sep 23, 2026
13	BOO Productions S.A	Partial evidence	Marousi, GreeceHQ checked Sep 23, 2026	11-50	33 contacts →
	Partial evidence “Over the past 19 years, Boo Productions has received numerous awards at leading domestic advertising festivals, including most recently the prestigious Production Company of the…” Source: RevenueBase Database · checked Sep 23, 2026
14	Creace SA	Partial evidence	Marousi, GreeceHQ checked Sep 23, 2026	11-50	32 contacts →
	Partial evidence “We’re a creative marketing & advertising agency which believes that idea should make an impact-no matter the brand, no matter the communication path.” Source: RevenueBase Database · checked Sep 23, 2026
15	Attp Advertising	Partial evidence	Gazi - Athens, GreeceHQ checked Sep 23, 2026	11-50	31 contacts →
	Partial evidence “attp is an advertising agency based in Athens Greece, head of a Group of specialized companies that offer a full and comprehensive range of communication services to international…” Source: RevenueBase Database · checked Sep 23, 2026
16	Savvy Partners	Partial evidence	Athens, GreeceHQ checked Sep 23, 2026	11-50	30 contacts →
	Partial evidence “Being a mere 19 years on the Communication /Advertising Universe, we find it normal to feel like teenagers (some don’t seem to consider it a virtue, but our clients do).” Source: RevenueBase Database · checked Sep 23, 2026
17	BRAVE	Partial evidence	Khalándrion, GreeceHQ checked Sep 23, 2026	11-50	29 contacts →
	Partial evidence “We are Brave, an independent award winning Creative & Advertising agency based in Athens, Greece.” Source: RevenueBase Database · checked Sep 23, 2026
18	Giraffes In The Kitchen	Indirect evidence	Halandri, GreeceHQ checked Sep 23, 2026	11-50	24 contacts →
	Indirect evidence “We are Giraffes in the Kitchen, an award-winning agency that blurs the lines between disciplines and delivers measurable experiences by understanding needs, evaluating the…” Source: RevenueBase Database · checked Sep 23, 2026
19	Orange Advertising	Indirect evidence	Attica, GreeceHQ checked Sep 23, 2026	11-50	24 contacts →
	Indirect evidence “Orange was created in 1989 to offer creative business and above the line & below the line communication strategies.” Source: RevenueBase Database · checked Sep 23, 2026
20	MINDS	Partial evidence	Thessaloniki, GreeceHQ checked Sep 23, 2026	11-50	22 contacts →
	Partial evidence “Minds is a multifaceted communication agency with over 20 years of experience in the fields of strategic advertising.” Source: RevenueBase Database · checked Sep 23, 2026
21	Publicis Groupe Greece	Indirect evidence	Khalándrion, GreeceHQ checked Sep 23, 2026	51-200	22 contacts →
	Indirect evidence “Publicis Groupe Greece is a Communications Group that operates under a highly modular Connecting Company model, a unique platform that gives clients plug & play access to our…” Source: RevenueBase Database · checked Sep 23, 2026
22	Unlimited Creativity	Indirect evidence	Athens, GreeceHQ checked Sep 23, 2026	11-50	22 contacts →
	Indirect evidence “We are proud members of the communication family of V+O Greece.” Source: RevenueBase Database · checked Sep 23, 2026
23	FCB Gnomi	Partial evidence	Alimos, GreeceHQ checked Sep 23, 2026	51-200	19 contacts →
	Partial evidence “FCB GNOMI is the Athens based branch of the FCB global advertising network.” Source: RevenueBase Database · checked Sep 23, 2026
24	K2 Design	Indirect evidence	Athens, GreeceHQ checked Sep 23, 2026	11-50	15 contacts →
	Indirect evidence “We believe that great brands deserve the world stage.” Source: RevenueBase Database · checked Sep 23, 2026
25	Cicero Advertising	Partial evidence	Chalandri, GreeceHQ checked Sep 23, 2026	11-50	14 contacts →
	Partial evidence “CICERO is a content-driven advertising agency that provides unique business strategy, design and marketing services, while remaining dedicated to being different and creating…” Source: RevenueBase Database · checked Sep 23, 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: big six advertising agencies. 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 big six advertising agencies.
Partial evidence: Its own public description names part of big six advertising agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name big six advertising agencies. 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 238 big six advertising agencies based in Greece

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Big six advertising agencies based in Greece at a glance

As of Sep 23, 2026

21.9%Verified-email coverage

3.7%Mobile-number coverage

12.1Average contacts per company

1-10Median size (employees)

34.0%Largest-city concentration · Athens

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

142

11-50

51-200

201-500

Freshness & accuracy

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

Email last verified

Median 25.0d

4870–30

13531–60

861–90

190–180

2180+

Company record updated

Median 77.0d

00–30

88131–60

1,14461–90

75290–180

110180+

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 big six advertising agencies, 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 Greece whose own description of what they do matches “big six advertising agencies”. 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 big six advertising agencies), 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 big six advertising agencies, and records with no verified work email. Companies headquartered outside Greece 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, 633 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 23, 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.

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 big six advertising agencies, 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 big six advertising agencies are there based in Greece?

RevenueBase identified 238 big six advertising agencies headquartered in Greece 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?

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

Which city has the most big six advertising agencies?

Athens leads with 81 headquartered companies, followed by Thessaloniki (11) and Agia Paraskevi (4).

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 633 verified decision-maker contacts tracked across these 238 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 23, 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.