Media buying is more than just purchasing ad space — it’s about strategic planning, audience targeting, and delivering the right message at the right time. The best media buying agencies know how to stretch your budget while maximising reach, engagement, and return on investment. In this list, we’ve rounded up 15 of the most trusted names in the industry, each with a proven track record of helping brands make a lasting impact.
1. Munro Agency
The Munro Agency focuses on creating high-performing digital marketing strategies that convert visitors into leads. They combine creativity with data-driven insights to help businesses grow online.
Office Location: Glasgow, UK
Year Founded: 2016
Team Size: 2–10 employees
Key Services: B2B lead generation, marketing automation, SEO, PPC, content marketing, inbound marketing
Industries Served: Technology, SaaS, education, consultancy, hospitality, e-commerce
Case Studies: View all case studies
Horizon Media is the largest independent media agency globally, renowned for its data-driven approach and innovative strategies. With a diverse portfolio of clients, they specialize in creating personalized, impactful brand experiences across various platforms.
Office Location: New York City, USA
Year Founded: 1989
Team Size: 2,500 employees across the country
Key Services: Media planning and buying, campaign management, analytics, e-commerce, retail media, influencer marketing
Industries Served: Retail, automotive, CPG, entertainment, technology, healthcare, travel, financial services
Case Studies: View all case studies
Publicis North America is a leading advertising agency known for its innovative campaigns and strategic brand solutions. With a rich history and a diverse portfolio, they continue to shape the advertising landscape in the region.
Office Location: New York City, USA
Year Founded: 1997
Team Size: 2,000 employees globally
Key Services: Traditional and digital marketing, brand strategy, social media, e-commerce, web development
Industries Served: Consumer goods, retail, healthcare, technology, finance
Case Studies: View all case studies
4. Initiative
Initiative is a global media agency renowned for its innovative approach to brand growth, combining cultural insights with strategic media planning. Their proprietary framework, Fame & Flow, focuses on building brand recognition and delivering seamless customer experiences across various platforms.
Office Location: New York City, USA
Year Founded: 1970
Team Size: 2,000 employees worldwide
Key Services: Media planning and buying, programmatic media, content marketing, performance marketing, market research
Industries Served: Retail, technology, finance, automotive, healthcare
Case Studies: View all case studies
5. Carat
Carat is the world’s first media agency, consistently ranked as the top global media network. With a presence in over 100 countries, Carat specializes in designing media experiences that connect brands with people, driving both immediate performance and long-term transformation.
Office Location: New York City, USA
Year Founded: 1966
Team Size: 12,000 employees worldwide
Key Services: Media planning and buying, audience insights, digital transformation, brand strategy
Industries Served: Consumer goods, retail, technology, healthcare, automotive
Case Studies: View all case studies
6. VML
VML is the result of the merger between VMLY&R and Wunderman Thompson, creating a powerhouse in marketing, creative commerce, and customer experience. With a global footprint that spans every major market, the agency designs connected brand strategies powered by data, technology, and creativity.
Office Location: New York City, USA
Year Founded: 2023
Team Size: 30,000 employees globally
Key Services: Brand experience, customer experience, commerce, creative communications, digital marketing
Industries Served: Consumer goods, healthcare, automotive, technology, retail, pharmaceuticals
Case Studies: View all case studies
EssenceMediacom is a large media agency with a strong focus on data, analytics, creativity, and multichannel planning. They’re driven by a “breakthrough” ethos—fusing performance tools and strategic scale to help brands rethink how they connect with audiences.
Office Location: New York City, USA
Year Founded: 2023
Team Size: 10,000 employees worldwide
Key Services: Integrated media solutions, analytics, creative technology, performance tools, multichannel planning
Industries Served: Technology, automotive, consumer goods, finance
Case Studies: View all case studies
8. OMD
OMD is a global media agency network rooted in creative media solutions that connect brands with people in meaningful and culturally relevant ways. With a mission of “creating what’s next,” the agency blends commercial insight, cultural relevance, and creative storytelling to transform businesses across channels.
Office Location: New York City, USA
Year Founded: 1996
Team Size: 14,000 employees globally
Key Services: Media planning, media buying, communications strategy, data analytics, programmatic media
Industries Served: Retail, technology, CPG, automotive, healthcare, finance
Case Studies: Not available
9. Starcom
Starcom is an international media network renowned for evolving its strategy to blend data, digital creativity, and technology-driven media solutions. Their guiding principle—that people are at the core of everything—drives them to craft media experiences that connect effectively and meaningfully.
Office Location: Chicago, USA
Year Founded: 2000
Team Size: 7,000 employees globally
Key Services: Media planning and buying, digital and performance marketing, advanced analytics, content creation
Industries Served: CPG, retail, technology, automotive, finance, healthcare, entertainment
Case Studies: View all case studies
Accelerated Digital Media helps high-growth brands maximize online performance through strategic paid media and data-driven marketing solutions. Their team specializes in optimizing campaigns for efficiency and measurable ROI, making them a trusted partner for scaling businesses.
Office Location: Chicago, USA
Year Founded: 2017
Team Size: 11–50 employees
Key Services: Paid search advertising, paid social advertising, programmatic media buying, conversion rate optimization
Industries Served: Healthcare, e-commerce, SaaS, direct-to-consumer brands
Case Studies: View all case studies
One of the first mobile marketing agencies, M+C Saatchi Performance has evolved into a performance marketing specialist. They focus on measurable growth across digital channels—making data the heart of every campaign.
Office Location: London, UK
Year Founded: 2006
Team Size: 201–500 employees
Key Services: Media planning & buying, app marketing, app store optimization, influencer marketing, analytics
Industries Served: Gaming, e-commerce, media & entertainment, fintech
Case Studies: View all case studies
12. Mindshare
Mindshare is a leading global media agency that helps brands make faster, smarter decisions in an ever-changing media landscape. The agency combines strategic insight, creative thinking, and data-driven execution to deliver impactful campaigns.
Office Location: London, UK
Year Founded: 1997
Team Size: 5,000 employees worldwide
Key Services: Media strategy and planning, programmatic advertising, data analytics, consumer insights, content creation
Industries Served: Retail, automotive, consumer packaged goods, technology, finance, travel and hospitality
Case Studies: View all case studies
13. Zenith
Zenith is proud to be “The ROI Agency,” blending data, technology, and creative strategy. It helps brands drive growth and media effectiveness across global markets.
Office Location: London, UK
Year Founded: 1988
Team Size: 6,000 employees worldwide
Key Services: Media planning and buying, content and performance marketing, data analytics, SEO, SEM
Industries Served: Automotive, FMCG, healthcare, technology, entertainment, travel & tourism, finance, media, telecoms
Case Studies: View all case studies
14. Wavemaker
Wavemaker is a global media agency firmly rooted in strategic media buying with a strong focus on driving growth through data, content, and technology. They partner with major global brands to deliver performance-focused media solutions that matter.
Office Location: London, UK
Year Founded: 2017
Team Size: 7,000 employees globally
Key Services: Media planning and buying, content-driven strategy, data analytics, digital and performance marketing
Industries Served: Beauty, retail, consumer electronics, telecoms, CPG, entertainment, luxury
Case Studies: View all case studies
15. Moburst
Moburst is a mobile-first, full-service digital marketing agency that enables brands to become category leaders through creative thinking, advanced technology, and data-driven strategies. They now offer an expansive suite of over 25 services.
Office Location: New York City, USA
Year Founded: 2013
Team Size: 100–200 employees
Key Services: Mobile strategy, SEO, CRO, media buying, content creation, influencer marketing
Industries Served: E-commerce, gaming, fitness, wellness, travel, productivity apps
Case Studies: View all case studies
How We Chose the Best Media Buying Agencies
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Proven Track Record – Assessed each agency’s portfolio, case studies, and client success stories to ensure consistent, measurable results.
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Industry Expertise – Looked for deep knowledge of media buying strategies across multiple channels, from digital to traditional.
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Client Feedback – Reviewed testimonials, independent ratings, and reviews to gauge customer satisfaction and service quality.
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Innovation & Tools – Evaluated the use of advanced analytics, targeting technologies, and campaign optimisation tools.
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Value for Investment – Considered pricing transparency, budget flexibility, and overall return on investment delivered to clients.
The Bottom Line
Choosing the right media buying partner can be the difference between campaigns that merely run and campaigns that truly perform. If you’re looking for a team that blends data-driven strategies with creative precision, the Munro Agency is here to help. From targeted ad placements to complete digital marketing solutions, we’ll ensure your message reaches the right audience at the right time. Get in touch with our team today to start your next winning campaign.
FAQs
A media buying agency helps businesses purchase advertising space across channels like TV, radio, print, online, and social media. They negotiate rates, plan ad placements, and optimise campaigns to maximise reach and return on investment.
To choose the best media buying agency, look for a proven track record, strong industry expertise, positive client reviews, innovative tools, and transparent pricing. A good agency will tailor strategies to your goals and budget.
Media planning involves deciding where, when, and how to run ads to reach the target audience effectively. Media buying is the execution stage—purchasing the ad space and negotiating the best rates for those placements.
Media buying agency fees vary based on ad spend, campaign complexity, and agency pricing models. Some charge a percentage of ad spend, while others offer flat fees or hourly rates.
Hiring a media buying agency gives you access to expert negotiators, industry discounts, and strategic placement that can improve results. Agencies also use analytics tools to track performance and adjust campaigns for maximum ROI.
