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Top London AdTech Companies (178)

AdTech • Digital Media • Marketing Tech
16 Offices
5,000 Employees

Comcast Advertising is driving the TV advertising industry forward, from delivering ads to linear and digital audiences to pioneering the tech that makes it possible. We help brands connect with their audiences on every screen using advanced data. Just as important as our work is our inclusive and supportive culture, which has earned us recognition as one of the top ten places to work by Great Place to Work.


AdTech • Big Data • Digital Media • Marketing Tech
16 Offices
900 Employees

Integral Ad Science (IAS) is a leading global media measurement and optimization platform that delivers the industry’s most actionable data to drive superior results for the world’s largest advertisers, publishers, and media platforms. IAS’s software provides comprehensive and enriched data that ensures ads are seen by real people in safe and suitable environments, while improving return on ad spend for advertisers and yield for publishers. Our mission is to be the global benchmark for trust and transparency in digital media quality. For more information, visit integralads.com.


AdTech • Digital Media • Marketing Tech • Other
3 Offices
173 Employees

adMarketplace is the leader in search advertising on the open web. For over two decades, adMarketplace has delivered relevant search advertising to consumers who skip the legacy search engine results page. The world's largest search advertisers drive measurably incremental results from adMarketplace's exclusive media opportunities across the internet's leading browsers, shopping apps, and editorial sites. Our mission is to shape the consumer journey with relevant search advertising and measure media value transparently across diverse moments of consumer intent.


AdTech • Digital Media • Marketing Tech
6 Offices
545 Employees

GumGum is a contextual-first, global digital advertising platform that uses advanced AI technology to serve captivating creative ads that drive consumer attention, without the use of personal data. At GumGum, we don’t need to know who you are to deliver relevant and engaging ads that align with your active frame of mind. We believe that a digital advertising industry based on context rather than personal data builds a more equitable and less invasive future for the internet and is better for consumers, publishers and advertisers alike. Our blueprint for the future, The Mindset Matrix™, combines the power of context and creative in digital advertising to deliver superior attention and drive consumer action without sacrificing personal data. To be a part of this next phase of digital advertising that prioritizes data privacy, please visit www.gumgum.com/careers


AdTech • Artificial Intelligence • Marketing Tech • Software • Analytics
12 Offices
2,194 Employees

Zeta Global (NYSE: ZETA) is the AI-Powered Marketing Cloud that leverages advanced artificial intelligence (AI) and trillions of consumer signals to make it easier for marketers to acquire, grow and retain customers more efficiently. Through the Zeta Marketing Platform (ZMP), our vision is to make sophisticated marketing simple by unifying identity, intelligence and omnichannel activation into a single platform – powered by one of the industry’s largest proprietary databases and AI. Our enterprise customers across multiple verticals are empowered to personalize experiences with consumers at an individual level across every channel, delivering better results for marketing programs. Zeta was founded in 2007 by David A. Steinberg and John Sculley and is headquartered in New York City with offices around the world.


AdTech • Artificial Intelligence • Machine Learning • Marketing Tech • Software • Sports • Big Data Analytics
13 Offices
1,800 Employees

From enabling sports to better collect and manage their data, to applying it to power better fan engagement, our technology and expertise delivers the difference to more than 700 sports, betting and media partners around the world. Founded in 2001, Genius Sports is now one of the world’s largest sports technology companies with over 1,800 employees. We're headquartered in London and have offices in New York, LA, Medellin, Tallinn, Sofia, Melbourne, Bologna, Vilnius, Lausanne and Singapore.


AdTech • Marketing Tech
17 Offices
550 Employees

As a leading independent ad tech platform, we provide brand and privacy-safe solutions that empower our clients to achieve maximum results. We offer the market an independent ad server, SSP, buyer tools, media services, and more.

 This combination of engineering excellence and client expertise helps us serve the interests of both the supply-side and the demand-side with equal professionalism and technical sophistication. 

 And, as we work toward fulfilling on the promise of advertising technology, we also keep the consumer and their rights in mind in all we do Our objective? Disrupt the digital advertising industry through high-performance solutions, innovative formats, and exceptional quality. Our pride? A global and diverse team that flourishes through a corporate culture advocating ownership and who live through three essential values: Be brave, Be thoughtful, Be together.


AdTech • Blockchain • Digital Media • eCommerce • Machine Learning • NFT • Web3
2 Offices
120 Employees

SmartMedia Technologies (SMT) is reshaping the landscape of customer engagement and loyalty to help some of the world’s major enterprises to drive better business outcomes. SMT is the only complete end-to-end solution that bridges the gap between Web2 and Web3, making Web3 safe, easy and valuable for brands and fun, open and rewarding for consumers. Over 50 partners, including Accenture, Dentsu, NBA, PepsiCo, Unilever, Visa and WPP, leverage SMT’s enterprise SaaS engagement and loyalty platform to deliver immersive, gamified and personalized experiences - at scale. SMT also owns and operates the professional services companies FASTG8, TRADR and SmartMedia Labs, which are all powered by the SmartMedia Stack - a Self-Serve Audience Activation and Real-Time Programmatic SmartMedia Buying Platform.


AdTech • Digital Media • eCommerce • Marketing Tech • Sales
2 Offices
500 Employees

MVF powers growth for our clients by connecting them to potential customers. The digital marketing landscape is complex and constantly evolving. Businesses need experts who are tracking that evolution and finding new ways to innovate and win. This is where MVF comes in. We match readers, buyers, & business leaders with the brands & companies that make the products and services they need. We do this by building relationships with potential customers at each stage of the marketing funnel by offering insights, information, and tools to help them learn more about the things they’re interested in. We build profiles on our audiences, guide them through purchase decisions, and ultimately connect them to the right products/services when they are ready to buy. Our clients trust us as experts in lead generation, which frees up their time to do what they do best.


AdTech • Big Data • Digital Media • Software
10 Offices
915 Employees

Together, we power advertising that enables billions of people to stay informed, entertained, and connected. We introduce them to new ideas, products, and services that make their lives better. And we help media owners of all sizes realize their full potential. That’s a lot — that’s the power of advertising. But it’s only possible with great technology. And that’s where Magnite comes in. Magnite (NASDAQ: MGNI) is the world’s largest independent sell-side advertising platform. Publishers use our technology to monetize their content across all screens and formats including CTV, online video, display, and audio. Our tech fuels billions of transactions per day!


AdTech • Enterprise Web • Information Technology • Machine Learning • Marketing Tech • Sales
5 Offices
300 Employees

OpenX is focused on unleashing the full economic potential of digital media companies. We do this by making digital advertising markets and technologies that are designed to deliver optimal value to publishers and advertisers on every ad served across all screens.


AdTech • Artificial Intelligence • Digital Media • Marketing Tech • Social Media • Software • Generative AI
7 Offices
805 Employees

Smartly is the leading AI-powered advertising technology company transforming ad experiences for brands and their consumers. Our comprehensive advertising platform seamlessly integrates the capabilities of media, creative, and intelligence to power more than 800 billion impressions and generate more than 300 billion creatives annually, delivering tangible business outcomes for brands and advertisers. We are the only company managing creative and media for 600+ brands worldwide and $5B in ad spend across the largest media platforms, including Facebook, Google, Instagram, Pinterest, Snap, and TikTok. Our end-to-end technology, unmatched access to media platforms and exceptional customer service help Fortune 500 brands and advertisers to reach and engage consumers and learn what performs best. Visit Smartly.io to learn more.


AdTech • Marketing Tech
London, England
138 Employees

Snowplow empowers organizations to generate trustworthy, first-party customer data to power Marketing and Advertising performance. 1.9+ million sites and applications use Snowplow to generate and model first-party customer data from across their digital interfaces to capture descriptive customer journeys and build actionable first-party behavioral profiles. Purposely designed for the data platforms as a single source of truth; marketers, data teams and CDPs can activate Snowplow data across Customer 360, personalization and ML use cases. With Snowplow, organizations like Strava, Autotrader, and Software.com reach, engage and win customers, while retaining an industry-leading data governance posture, with full GDPR and CCPA compliance.


AdTech • Marketing Tech
London, England
75 Employees

Founded in 2012, Zeo Agency is an international SEO and digital marketing agency that provides SEO (search engine optimization), SEM (search engine marketing), performance marketing and content marketing services to more than 100 clients actively. In 2014, Zeo also founded icerik.com that creates innovative, and magnetic content that engages customers’ target audience. Expanding its services in years, Zeo has developed seo.do, world’s first AI-powered rank tracking tool. Zeo has three offices which are located in Istanbul, Ankara and London. While digital marketing consultancy is operated in Istanbul and London, the R&D studies are conducted at Ankara. Digitalzone Every October, Zeo organizes Digitalzone, the largest digital marketing conference of Eastern Europe and MENA, bringing together valuable speakers and more than 800 participants for two days in Istanbul. (for further information please visit: https://zeo.org/digitalzone/en/) Approach We’re marketing scientists who love SEO and digital marketing to bits, passionately building smart data analysis and creative ideas! Our skilled team of professionals conform to a set of core values to guarantee that we provide unparalleled digital search marketing services to each client. Our approach is ethical, our strategies are bespoke, our tactics are transparent and we understand that success only happens by engaging both humans and search engines. Awards European Search Awards 2023 / Winner -Most Innovative Campaign: icerik.com & Medicana MENA Search Awards 2022 / Winner -Best Use of Search: Zeo & RSS Interactive -Best Low Budget Campaign: Zeo & Armağan Oyuncak European Search Awards 2022 / Winner -Best Low Budget Campaign (SEO): Zeo & Ajansspor UK Search Awards 2019 / Winner -Best Health Campaign: Zeo & Acıbadem MENA Search Awards 2017 / Winner -Best Large SEO Agency: Zeo Agency -Young Search Personality: Mehmet Aktug -Best Local Campaign: Zeo & Enerjisa -Best Content Marketing: Zeo & Yemek.Com


AdTech • Marketing Tech
London, England
15 Employees

We're CheckoutSmart, and we're experts in gathering real reviews for everyday products, in the UK and beyond. Using our SmartReputation solution, you can boost your retail brand's online reputation in a world where customer reviews really matter. A weak online image can send shoppers to your rivals. That's where we come in. How do we do it? We have a panel of regular shoppers who buy from well-known stores. In return, they write honest reviews about their experience, making it easy for you to improve your brand's reputation. Just tell us which products and stores you want reviews for. We then use our proprietary data to decide exactly where you need reviews. These are then delivered via our patent pending technology directly onto any retailer site. Don't let your competitors take the spotlight. Team up with us today to start collecting positive reviews. Ask us about a free trial. Our cashback SmartActivation solution is ideal for getting shoppers to take instant action on your behalf - You have quality products in stores already. What's next? Getting people to try them or buy them more often. That's why we created SmartActivation in 2014. It helps attract new shoppers or increase sales with instant cashback offers. Our award-winning platform has a large, active shopper community and is available both as an app and a website. With SmartActivation, you can: - Quickly get people to try your new products in any store. - Increase sales for items that aren't doing well. - Set up custom campaigns to meet your specific goals. Want to know more? Contact us today to set up a SmartReputation or SmartActivation campaign. Email us at [email protected]


AdTech • Machine Learning • Marketing Tech
London, England
15 Employees

P.ai is a Creative Analytics platform, with a sprinkle of AI


AdTech • Agency • Marketing Tech
4 Offices
5,090 Employees

Dentsu is the largest agency brand and fifth largest agency group in the world. We provide a wide range of services in eight business domains: Marketing Digital Marketing Creative Sphere Promotions Media Content PR Global Business With more than 60,000 professionals in over 145 countries and regions, Dentsu identifies—through a variety of communication domains—the core issues faced by our clients. We then provide the optimized, integrated solutions required to solve these issues.


AdTech • Digital Media • Marketing Tech • SEO
4 Offices
350 Employees

We are iCrossing. We are digital marketers at our core. We have an intimate understanding of the technology, tools, and human skills required to build and activate transformative experiences which can, over time, make significant business impact and propel clients into the future. We use imaginative & collaborative creativity to design experiences that connect on a human level - inspiring audiences to explore, to engage, to choose, to care... about our client’s brand over another. We build seamless digital experiences that influence consumers to act. With unrivaled access to Hearst’s powerful consumer insights, we uncover the data-powered drivers that matter to your audiences and use them to build impactful, creative, consumer-first experiences that provide significant business growth.


AdTech • Social Media
London, England
24 Employees

We are Yoke. Through our network of Tiktok, Instagram & Snapchat Influencers, we deliver results for brands and apps


AdTech • Marketing Tech • Social Media
London, England
27 Employees

myThings is a global leader in fully customized performance programmatic, personalizing dynamic creative for leading global brands on web and mobile. With more than a decade of experience and intelligence in retargeting and re-engagement, we work with the largest retail, travel and ticket sales brands including Puma, Nordstrom Rack, Southwest and Primesport. We strive to provide unmatched levels of customization and control, as well as dynamic, optimized creative that is properly brand-aligned, in addition to performance at scale. Our solutions marry the best of performance and brand marketing, all in real time. This really is performance programmatic made for you