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100 leading Advertising Services companies in the world

Tamtam tracks 7,500 Advertising Services companies worldwide. This list ranks the 100 largest by number of employees on LinkedIn, led by WPP, Publicis Groupe and VML. Their median headcount is 5,382. The most common headquarters are New York (24), London (19) and Paris (4).

🌍 World100 companiesUpdated Nov 13, 2026

This list features large advertising services companies from around the world. These firms specialize in creative transformation, digital business transformation, media solutions, and brand experience. They include WPP, a creative transformation company, and Publicis Groupe, which helps clients transform their marketing and digital businesses. Other notable companies are VML, a global creative agency, and dentsu, which helps brands predict future opportunities.

A significant number of these companies, such as WPP, Clinic, and Clear Channel Europe, are headquartered in London, indicating a concentration of major players in the advertising sector in the UK capital. New York also features prominently with companies like VML, WPP Media, and Omnicom Media.

#CompanyIndustryHeadquarters EmployeesFounded
1
WPPwpp.com

Creative transformation company uses creativity to build better futures for people, planet, clients, and communities

Advertising Services 🇬🇧 London 41,040 n/a
2
Publicis Groupepublicisgroupe.com

Helps clients transform their marketing and digital businesses, providing expertise in communications, media, data, and technology across 100+ countries.

Advertising Services 🇫🇷 Paris 41,020 n/a
3
VMLvml.com

Global creative agency combining brand experience, customer experience, and commerce with deep data and technology expertise for clients.

Advertising Services 🇺🇸 New York 34,192 n/a
4
WPP Mediawppmedia.com

Global media collective leveraging AI, platforms, people, and partners to create innovative solutions driving brand growth worldwide daily.

Advertising Services 🇺🇸 New York 28,457 n/a
5
Work From Home Jobsworkfromhomejobs.me

A platform for remote job seekers to discover various work from home job opportunities from different sources in one place

Advertising Services 🇺🇸 Los Angeles 19,671 n/a
6
dentsudentsu.com

Helping brands predict future opportunities and create growth paths by connecting brand, content, commerce, and experience with creativity.

Advertising Services 🇯🇵 Tokyo 19,298 n/a
7
Clinicclinic.co.uk

Independent creative agency crafting bold ideas to drive action and change, with a focus on people's experiences and problem-solving for brands

Advertising Services 🇬🇧 London 19,192 1983
8
JOBsomosjob.ar

A communication and services agency providing creative solutions to consumer goods marketing teams Expert team with offices in Argentina and Uruguay

Advertising Services 🇦🇷 Buenos Aires 15,492 1977
9
Clear Channel Europeclearchanneleurope.com

Leading outdoor media company across 14 markets, transforming advertising through data-driven innovations and infrastructure for brands and positive global impact.

Advertising Services 🇬🇧 London 15,206 n/a
10
work from anywhererjpjrblue.ws

Online business coach and mentor specializing in affiliate marketing, with multiple online businesses including SFI and cryptocurrency mining companies Working with sister to achieve success

Advertising Services 🇺🇸 Orlando 13,925 2012
11
Omnicom Mediaomnicommedia.com

Designs growth ecosystems using Omni Intelligence Platform, connecting media agencies to deliver relevant consumer and client experiences globally.

Advertising Services 🇺🇸 New York 13,741 1998
12
BARcivediamoalbar.com

Custom websites for all types and sizes Whether sober, elegant, or quirky, they create unique sites tailored to match your personality

Advertising Services 🇮🇹 Milan 12,967 2019
13
EssenceMediacomessencemediacom.com

EssenceMediacom is a leading agency focused on delivering marketing breakthroughs for brands through integrated media solutions and continuous learning

Advertising Services 🇬🇧 London 12,000 2023
14
Fiverr and Upwork Freelancers (Buyers and Sellers)

Provides social media management, Facebook and LinkedIn marketing, business lead generation, influencer promotion, digital skills endorsements, and online shop integration for global freelancers.

Advertising Services 🇮🇳 Phalpadia 11,661 2013
15
SHOPsearchfindorder.com

Innovative marketplace offering a variety of trendy products including gadgets, electronics, home items, and automotive accessories for consumers seeking the latest trends

Advertising Services 🇨🇦 Milton 11,517 n/a
16
Epsilonepsilon.com

It provides data-driven marketing solutions, enabling brands to engage consumers effectively across various channels using advanced technology and analytics.

Advertising Services 🇺🇸 Irving 11,146 n/a
17
Publicis Mediapublicisgroupe.com

A global media company within Publicis Groupe, employing data-driven solutions and platform-based technologies to deliver client value and drive growth internationally

Advertising Services 🇬🇧 London 11,033 n/a
18
Havashavas.com

Global communications network providing integrated, data-driven, AI-powered marketing and communication solutions through collaborative, innovative teams worldwide.

Advertising Services 🇫🇷 Puteaux 11,029 n/a
19
Stagwellstagwellglobal.com

A challenger holding company specializing in transforming marketing strategies and practices

Advertising Services 🇺🇸 New York 10,825 n/a
20
Ogilvyogilvy.com

A global creative agency, specializing in advertising, media, public relations, and consulting, known for crafting iconic, culture-changing ideas for clients worldwide

Advertising Services 🇺🇸 New York 10,731 n/a
21
TBWA\Worldwidetbwa.com

Innovative creative collective using Disruption® methodology to build strong brands that defy convention and compete with culture globally

Advertising Services 🇺🇸 New York 10,386 n/a
22
Quadquad.com

Global marketing experience company streamlining marketing complexities with state-of-the-art technology and data-driven solutions for brands to make direct consumer connections

Advertising Services 🇺🇸 Sussex 10,261 1971
23
SEOoptimising.com.au

A leading SEO agency with over 15 years of experience, offering in-house services for web development, PR, copywriting, and digital marketing

Advertising Services 🇦🇺 Melbourne 10,205 1999
24
Almacénelalmacen.tv

An advertising agency founded in 2003, providing comprehensive communication services in traditional and digital media, BTL projects, and design for various brands

Advertising Services 🇦🇷 Olivos 9,273 2004
25
Other.™weareother.ca

Specialized paid media and performance creative agency helping marketers optimize media spend, achieve targets, and outperform competition with proven methodologies and successful campaigns

Advertising Services 🇨🇦 Toronto 9,168 2015
26
GroupMwppmedia.com

A global media investment group shaping the future of advertising to be more effective, with expertise in data, entertainment, and investment solutions

Advertising Services 🇺🇸 New York 9,156 2003
27
TAXIvml.com

Offers world-class brand, customer, and commerce capabilities as part of VML, with offices in Montréal and New York.

Advertising Services 🇨🇦 Montreal 9,150 n/a
28
IPG Mediabrandsomnicommedia.com

manages global marketing investments through full-service agencies and specialty units, serving diverse industries with media and marketing solutions

Advertising Services 🇺🇸 New York 8,776 n/a
29
HH Globalhhglobal.com

Global leader in tech-enabled creative production and procurement, partnering with clients and suppliers worldwide to deliver impactful creative solutions.

Advertising Services 🇬🇧 London 8,626 n/a
30
Omnicomomc.com

Global marketing communications company offering integrated marketing services for 200+ brands worldwide, known for talent, creativity, and digital innovation

Advertising Services 🇺🇸 New York 8,062 n/a
31
DDBtbwa.com

This company prioritizes people, product, and profit in that order, fostering diverse teams to create magic in their work

Advertising Services 🇺🇸 New York 7,459 1949
32
Wavemakerwavemakerglobal.com

Wavemaker specializes in Provocative Planning to drive growth by combining machine learning and human intelligence for better outcomes and consumer experiences #GrowFearless #PositiveProvocation

Advertising Services 🇬🇧 London 7,200 n/a
33
Leo Burnettleoburnett.com

Global communications agency combining creativity, data, and technology to influence human behavior and drive client prosperity worldwide.

Advertising Services 🇺🇸 Chicago 6,825 n/a
34
SGKsgkinc.com

Global packaging and brand experience company delivering solutions for brands to speak louder, scale faster, and grow stronger, with 6,500 employees worldwide

Advertising Services 🇺🇸 Des Plaines 6,821 n/a
35
Mindsharemindshareworld.com

A media services company that accelerates enduring and sustainable business growth for clients through data and behavioral science, connecting brands with consumers

Advertising Services 🇬🇧 London 6,729 n/a
36
Insightsnospace.com

Global leader in marketing data and analytics, providing deep insights into consumer behavior to inspire growth for clients worldwide

Advertising Services 🇬🇧 London 6,668 n/a
37
MERCADOagenciamercado.com

Creative agency specializing in relationship marketing strategies, digital tools, and metrics to help brand owners achieve key objectives

Advertising Services 🇵🇹 Lisbon 6,557 2013
38
Digital Marketing

The company specializes in digital marketing services, utilizing online platforms and technologies to promote products and services through various channels

Advertising Services 🇺🇸 Las Vegas 6,410 n/a
39
McCannmccann.com

A global leader in creativity, strategy, and brand communication, uniting diverse practices across 100+ countries to help brands connect with consumers effectively

Advertising Services 🇺🇸 New York 6,335 n/a
40
JCDecauxjcdecaux.com

Global leader in outdoor advertising, specializing in street furniture, transport advertising, and billboard displays worldwide.

Advertising Services 🇫🇷 Neuilly-sur-Seine 6,312 1964
41
Havas Media Networkhavasmedianetwork.com

Global media networks providing programmatic buying, data consulting, performance marketing, and social media services to connect brands with target audiences.

Advertising Services 🇺🇸 New York 6,053 1978
42
Saleslandsalesland.net

A global sales specialist recruiting, training, and leading commercial teams across 13 countries, focusing on direct and indirect selling, marketing, and advertising

Advertising Services 🇪🇸 Madrid 5,854 2000
43
BOUTIQUEweareboutique.co.uk

A fiercely independent agency focused on delivering ambitious media, digital, PR, and social solutions for clients driven by growth and results

Advertising Services 🇬🇧 Leeds 5,825 2012
44
Dentsu Creativedentsucreative.com

Global creative agency network unlocking client growth. Uses transformative creativity for positive impact on people, business, and society.

Advertising Services 🇺🇸 5,803 n/a
45
PHDphdmedia.com

Global media agency network combining data, technology, and human expertise to create innovative campaigns and transform brand experiences worldwide.

Advertising Services 🇬🇧 Bankside 5,700 1990
46
Omawoomawo.com

Providing website owners quality websites, tips to increase online traffic and turnover, and insight into French affiliate marketing.

Advertising Services 🇬🇧 Bath 5,692 n/a
47
Starcomstarcomww.com

A global leader in communications planning and media, focused on putting people at the center to inspire and drive business forward through data and technology

Advertising Services 🇺🇸 Chicago 5,691 n/a
48
Otraotra.in

Connects advertisers with vehicle owners for moving ad spaces. Redefines vehicle advertising with metric attribution, traceability, and geotargeting. Provides vehicle owners secondary income.

Advertising Services 🇮🇳 Bengaluru 5,494 2017
49
Fiverr Freelancers (Buyer and Seller)

Professionals in social media management and marketing, offering expertise in growing and managing LinkedIn and Facebook pages, promotion, ad campaigns, and employee services

Advertising Services 🇵🇰 Yazman 5,409 2014
50
Zenithzenithmedia.com

A global agency specializing in media, data, technology, commerce, and content to drive successful business outcomes for clients worldwide

Advertising Services 🇬🇧 London 5,382 n/a

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51
nientelinkedin.com

No information about company activities, services, or products available in the provided content to describe company operations.

Advertising Services 🇮🇹 5,342 n/a
52
Residenciaresidencia.com.mx

A multi-purpose agency creating digital experiences through various tools and technologies, including websites, online ads, viral campaigns, apps, videos, and interactive installations

Advertising Services 🇲🇽 Mexico City 5,301 2006
53
Foundryfoundryco.com

It focuses on media and martech, emphasizing relationships, consented data, and driving progress in diversity, inclusion, and tech accessibility.

Advertising Services 🇺🇸 San Francisco 5,292 n/a
54
Monksmonks.com

Provides global marketing, technology services, AI-driven data science, and content production to help brands accelerate business and outpace competition.

Advertising Services 🇬🇧 London 5,067 2001
55
FIRMAwearefirma.com

A full-service Branding and Innovation agency creating successful brands by combining actionable insights, strategic thinking, and creative imagination

Advertising Services 🇪🇸 Barcelona 4,889 2006
56
Havas Creative Networkhavascreative.com

Innovative global communications network offering custom solutions through a connected ecosystem of multidisciplinary teams, with access to entertainment and culture

Advertising Services 🇺🇸 New York 4,874 n/a
57
V4 Companyforms.v4company.com

An innovative marketing advisory firm specializing in optimizing sales online through the unique V4 Method, connecting results-driven individuals with businesses seeking growth

Advertising Services 🇧🇷 Campinas 4,867 2012
58
Digital Marketingdmnpco.com

Providing digital marketing strategies, social media marketing, SEO, and advertising services to small businesses and start-ups Consulting for online marketing analysis

Advertising Services 🇺🇸 San Diego 4,841 2010
59
Omnicom Precision Marketingomcpmg.com

Global digital marketing group leveraging data and CRM to create targeted customer experiences at scale through technology, strategy, data, and consulting services

Advertising Services 🇺🇸 New York 4,799 n/a
60
Saatchi & Saatchisaatchi.com

Global communications and advertising network creating impactful creative ideas that build strong emotional connections between consumers and brands worldwide.

Advertising Services 🇬🇧 London 4,737 1970
61
DEPT®dept.global

A pioneering technology and marketing services company creating global digital experiences for top brands, committed to sustainability and innovation

Advertising Services 🇳🇱 Amsterdam 4,701 n/a
62
Business Bytes Pakistanbusinessbytes.pk

Providing up-to-date news and insights on Pakistan's business environment, fostering innovation and industry connection for professionals.

Advertising Services 🇵🇰 Islamabad 4,677 n/a
63
MediaComessencemediacom.com

An innovative marketing agency within EssenceMediacom GroupM, specializing in creating breakthroughs for brands Follow @EssenceMediacom for more

Advertising Services 🇬🇧 London 4,671 n/a
64
INDIVIDUALiindividual.co

A talent development and personal branding studio offering personalized platforms for individuals and teams to align vision, share stories, and grow

Advertising Services 🇺🇸 San Francisco 4,515 2019
65
MECmecglobal.com

It is a global media agency formed by MEC and Maxus, focusing on innovative marketing and advertising solutions for clients.

Advertising Services 🇬🇧 London 4,489 2002
66
SPOTPROMOspotpromo.com.br

Agency specializing in merchandising and promotions, focused on achieving results aligned with brand strategies through impeccable execution, innovative solutions, and ethical practices

Advertising Services 🇧🇷 São Paulo 4,269 2003
67
Harte Hankshartehanks.com

A global customer experience company specializing in personalized marketing, customer care services, and fulfillment solutions to create enduring connections

Advertising Services 🇺🇸 Chelmsford 4,267 1923
68
MNCmnc.co.uk

This media agency goes beyond media by combining creative solutions with tailored strategies to help startups scale and established brands maintain market leadership

Advertising Services 🇬🇧 London 4,218 1997
69
Vendedorinstagram.com

A dynamic Egyptian marketing startup offering digital services, branding, event management, media production, and web development to drive business growth internationally

Advertising Services 🇪🇬 Cairo 4,206 2021
70
OMDomd.com

Global media network driving digital growth for prestigious brands through industry-leading capabilities, recognized as most awarded, best performing, and most effective agency network globally

Advertising Services 🇺🇸 New York 4,140 n/a
71
Ströer SE & Co. KGaAstroeer.de

Leading German media house, offering outdoor advertising, digital media, dialog marketing, e-commerce, and Data as a Service solutions, reaching millions of users.

Advertising Services 🇩🇪 Cologne 3,924 1990
72
Jakartamedia7.net

A dedicated marketing agency in Jakarta, specializing in helping local businesses navigate digital marketing with simplified strategies and cost-effective solutions

Advertising Services 🇮🇩 Jakarta 3,921 n/a
73
Criteobit.ly

Provides a global commerce intelligence platform that drives performance for brands, agencies, retailers, and publishers using proprietary data and AI innovation.

Advertising Services 🇫🇷 Paris 3,918 n/a
74
Ximimximim.com

Award-winning international digital marketing services company providing solutions to help businesses grow and succeed online

Advertising Services 🇺🇸 Eltopia 3,894 2001
75
OLIVER | The Brandtech Groupoliverinside.ai

Design and operate bespoke in-house agencies and ecosystems for brands, driving business growth and innovative marketing solutions globally.

Advertising Services 🇬🇧 London 3,870 2009
76
dentsu Japandentsu.co.jp

A network of over 160 group companies in Japan offering services in advertising, business, customer experience, and digital transformations to support client growth

Advertising Services 🇯🇵 Tokyo 3,855 n/a
77
Publicis Re:Sourcespublicisresources.com

Provides technology solutions and business services including finance, accounting, legal, and procurement for agencies, enabling innovation and client transformation.

Advertising Services 🇫🇷 Paris 3,796 n/a
78
Google AdSensegoogle.com

A program that enables publishers to display targeted ads on their websites to generate revenue based on clicks or impressions

Advertising Services 🇺🇸 Mountain View 3,775 2003
79
Lamar Advertising Companylamar.com

Offers various outdoor advertising formats, including billboards, transit, and airport displays, to help businesses reach broad audiences across the United States and Canada.

Advertising Services 🇺🇸 Baton Rouge 3,761 1902
80
Acxiomacxiom.info

Connected data and identity foundation unifying and preparing information for AI-driven marketing and decision-making through privacy-first ethics and global governance strategies.

Advertising Services 🇺🇸 Conway 3,607 1969
81
Government of Karnataka Projectdigitalvaastu.com

The company operates in Karnataka, India, providing governance and legislative services with a parliamentary system of government in place

Advertising Services 🇮🇳 Bengaluru 3,547 2015
82
WPP Productionwppproduction.com

Global content production company integrating creative producers, AI, and virtual production to deliver innovative, fast, and scalable marketing content solutions.

Advertising Services 🇬🇧 London 3,507 n/a
83
TikTok for Businessads.tiktok.com

A global platform offering creative solutions for brands to engage with the TikTok community through full-screen video formats

Advertising Services 🇺🇸 New York 3,414 n/a
84
Local Authoritylocalauthority.org

A company providing a comprehensive local ranking report by analyzing Google My Business listings for agencies to improve local marketing campaigns

Advertising Services 🇺🇸 St Petersburg 3,413 n/a
85
Spark Foundrysparkfoundryww.com

A global media agency under Publicis Media, combining innovation with industry talent to deliver award-winning campaigns worldwide

Advertising Services 🇺🇸 New York 3,284 n/a
86
Hogarthwppproduction.com

Creative production company combining craft, insight, and technology to bring creative work to life across global locations.

Advertising Services 🇬🇧 London 3,262 2008
87
Publicispublicisna.com

Full-service advertising agency, helping clients lead digital transformation. Global network, strategic, creative, and digital ideas for brand leadership and public consciousness.

Advertising Services 🇺🇸 New York 3,237 n/a
88
JK - Agencyjkgroupe.com

Strategic communication & engagement firm specializing in designing social experiences to create innovative ideas and build impactful projects

Advertising Services 🇫🇷 Paris 3,135 2012
89
MRMmrm.com

Builds enduring brand relationships, grows customer lifetime value through CRM, CX, commerce, and MarTech, all backed by data and analytics.

Advertising Services 🇺🇸 New York 3,127 1982
90
SGS & Cosgsco.com

Global brand impact group driving success for world class clients through innovation, design, production, and technology to shift brands to impact

Advertising Services 🇺🇸 Louisville 3,126 1946
91
Initiativeinitiative.com

Initiative is a media agency that helps ambitious brands grow by creating Fame and Flow through strategic media planning and responsible practices

Advertising Services 🇺🇸 New York 3,126 1970
92
Horizon Mediahorizonmedia.com

Provides innovative media planning and buying services, focusing on business outcomes, diversity, and a strong client-centric culture.

Advertising Services 🇺🇸 New York 3,105 1989
93
Cheil Worldwidecheil.com

A global agency specializing in performance-driven marketing, connecting creativity, data, tech, and retail to enhance business performance and consumer brand experience

Advertising Services 🇰🇷 Seoul 3,067 1973
94
Mothermotherfamily.com

A globally respected, independent creative agency with offices worldwide, specializing in creating culturally impactful ideas for a diverse range of clients

Advertising Services 🇬🇧 London 3,065 1996
95
Spectrum Reachspectrumreach.com

The company is a trusted media sales company with 3,000 employees in 100 offices across 36 states, providing advertising solutions to businesses

Advertising Services 🇺🇸 New York 3,055 n/a
96
تسويق الكترونيsmartcodeit.com

A professional team offering digital marketing services, website design and development, graphic design, video production, presentations, targeted marketing, and social media management

Advertising Services 🇦🇪 Dubai 3,053 n/a
97
KINESSOacxiom.com

Technology-driven performance marketing agency providing actionable growth through optimization, analytics, AI, and experimentation capabilities across data, social platforms, commerce, and curated marketplaces.

Advertising Services 🇺🇸 New York 2,987 n/a
98
Greygrey.com

Creative marketing agency delivering effective ideas and growth solutions for global brands through innovative advertising and business problem-solving strategies.

Advertising Services 🇺🇸 New York 2,957 1917
99
Mosaic North Americamosaic.com

An integrated marketing agency in North America, creating connected brand experiences using data-led insights, expertise in various areas, and a 30-year history

Advertising Services 🇨🇦 Toronto 2,946 n/a
100
Solocalsolocal.com

Providing digital solutions to businesses in France through Search Local and Digital Marketing services, focusing on local content, personalized marketing, and growth acceleration

Advertising Services 🇫🇷 Boulogne-Billancourt 2,935 n/a

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Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.

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