Company lists · Data refreshed September 2026
Top 25 Media agencies based in Ireland
RevenueBase identified 244 media agencies headquartered in Ireland as of September 2026 and tracks 2,334 professional contacts across them, including 849 with verified work emails and 121 with mobile numbers. Dublin is the largest hub.
This list covers media agencies headquartered in Ireland, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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.
The 25 largest media agencies based in Ireland
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 281 | ||||
“Core is Ireland’s largest marketing communications company.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 2 | 66 | ||||
“OLIVER provides clients with dedicated agencies.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 3 | 58 | ||||
“We’re a marketing agency, specialising in strategic creative, experiential and events for Ireland’s loveliest brands.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 4 | 52 | ||||
“We are a full service advertising agency, a direct marketing agency and a digital marketing agency all housed under one roof in Dublin’s Smithfield.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 5 | 52 | ||||
“Marketing Network has established a reputation for delivering top-class marketing solutions since we were founded over 25 years ago.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 6 | 49 | ||||
“At Mixtape, we offer a unique blend of marketing services, integrating the best of experiential and below the line with ambient out of home solutions.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 7 | 48 | ||||
“Zenith is an award winning full service media planning and buying agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 8 | 46 | ||||
“Idea - your strategic marketing partner.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 9 | 42 | ||||
“Starcom is one of Ireland's leading media planning and buying specialists and is part of Core, Ireland’s largest marketing communications group.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 10 | 39 | ||||
“Spark Foundry is a leading Irish owned media planning and buying agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 11 | 39 | ||||
“One Productions is a Video Agency that specialise in Video Production and Video Marketing communications.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 12 | 37 | ||||
“PRCA Agency of the Year 2024.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 13 | 30 | ||||
“Catalyst Media is a leader in delivering cutting edge media solutions which offer a full circle of activities to our clients and partners.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 14 | 29 | ||||
“We are Mindshare.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 15 | Bbdo DublinIndirect evidence | 29 | |||
“Who we are: Founded in 1966 as Irish International, we are a people-first agency with an unparalleled creative heritage, that continues to set standards for the industry with our…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 16 | 27 | ||||
“We are KICK.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 17 | 26 | ||||
“ZOO is a creative digital agency.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 18 | 26 | ||||
“Welcome to the future of Advertising for SMEs Buymedia can support you in not only booking your advertising campaigns but in strategising where best to allocate your budget.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 19 | 25 | ||||
“For New Business: Sarah Love (MD) Sarah.Love@goosebump.ie For Careers & general enquiries: info@goosebump.ie goosebumpº is a creative advertising agency based in Dublin.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 20 | HeadcaseIndirect evidence | 25 | |||
“Who Headcase Are A Team of Creative Problem Solvers.(who view the world just that little bit Headcase do We help organisations & brands connect with audiences in We Do What We Do…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 21 | 25 | ||||
“We are InSight Marketing.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 22 | 23 | ||||
“Talon is a pioneering independently owned, global Out of Home agency with offices in the UK, US, Ireland, Germany, UAE and Singapore.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 23 | 22 | ||||
“We are Converge We're (a DSP) built for a new reality.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 24 | 21 | ||||
“We believe in the power of difference to make a difference.” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
| 25 | 19 | ||||
“Havas is a diverse group of creative innovators, strategists and digital obsessives based in Havas Village, our HQ in Dublin, also home to Havas Media, Gate One and h/Advisors…” Source: company website · checked Sep 5, 2026Thanks. The Data Team will review it. | |||||
Showing 25 of 244 media agencies based in Ireland
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Media agencies based in Ireland at a glance
As of Sep 5, 2026Companies by employee count
Verified emails by last verification
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 media agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Ireland whose own description of what they do matches “media agencies”. Matching reads each company's description, not its industry code or its name.
- What we exclude
- Companies whose own description does not clearly place them among media agencies, and records with no verified work email. Companies headquartered outside Ireland 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 an evidence 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, 849 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 5, 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.
Media agencies by metro
- Media agencies in Dublin87
Frequently asked
How many media agencies are there based in Ireland?
RevenueBase identified 244 media agencies headquartered in Ireland 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?
CORE, headquartered in Dublin, tops this list with the largest team on record.
Which city has the most media agencies?
Dublin leads with 87 headquartered companies, followed by Cork (7) and Galway (6).
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 849 verified decision-maker contacts tracked across these 244 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 5, 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.