Programmatic agencies in London.
Programmatic advertising is the automated, auction-based buying of digital media through demand-side platforms (DSPs) like DV360, The Trade Desk, and Amazon DSP. It spans display, online video, connected TV, digital out-of-home, and digital audio. Unlike PPC (search ads) or paid social (Meta, TikTok, LinkedIn), programmatic runs across the open web and broadcast-equivalent inventory. This page shows every agency on AgencyIndex offering programmatic in London.
- 11 UK agencies offering programmatic in London
- Part of the Programmatic service set
- Indexed in London
- Reviewed 17 May 2026
At Mass Reach, we help ambitious eCommerce and B2B companies turn ad spend into predictable growth. We've partnered with leading global brands to accelerate revenue through Google Ads, Meta Ads and LinkedIn Ads, supported by conversion rate optimisation to maximise ROI. Our work goes beyond campaign management, we build full-funnel growth systems that deliver measurable results, from lower custome
The digital results agency with a complete focus on making your online activity work harder than ever before. If the name rings a bell, that's because we're the sibling of creative agency J2. We were born in a world of big ideas but have evolved an unshakeable focus on digital results. From growing brands to driving sales, every campaign is geared to improve the bottom line. We optimise PPC, Paid
As a leading agency based in London, KINESSO provides innovative, technology-driven performance marketing solutions designed to achieve tangible business results. Our core services encompass Consulting, Data & Tech, Media, Experience, and Content. We leverage advanced automation, AI capabilities, and first-party data to enhance and optimise the connection between brands and their target audiences.
Zenith is a London-based agency providing a robust array of advertising and marketing solutions. As an integral part of our services, we specialise in media planning and procurement, online marketing, and data analytics, all designed to enhance brand communication strategies. Our distinctive advantage at Zenith is our dedication to utilising data-led insights to craft innovative and high-impact ma
OMD is a London-based agency delivering a broad range of media services, with a focus on harnessing data-driven insights to expedite superior decision-making for clients. Their key services encompass digital, data, and content capabilities, all anchored by their bespoke Act Fast Framework, designed for rapid adaptation in response to market fluctuations. OMD sets itself apart with a human-centred
Digitas, a London-based agency, specialises in a comprehensive suite of digital marketing solutions, concentrating on forging impactful relationships via inventive campaigns and platforms. Their core services encompass campaign creation, app development, and digital strategy, as illustrated by projects such as the OREO Press Play campaign and the Official Glastonbury 2022 App. Digitas' distinctive
Based in London, MG OMD is a distinguished agency renowned for its innovative and integrated media campaigns, specifically designed to yield real impact across all communication facets. The agency specialises in planning and securing advertising spaces, bolstered by unrivaled expertise in sculpting media strategies that resonate with diverse audiences. Setting itself apart, MG OMD boasts an award-
CMI Media Group, a London-based agency, specialises in strategic healthcare marketing services that are comprehensive and targeted. Our primary service offerings encompass strategic planning, SEM and SEO, social media management, data analytics, and technology consultation, all specifically tailored for the healthcare sector. Our unique value proposition is defined by our proprietary tools, Evolve
Saatchi & Saatchi, a prominent agency based in London, specialises in providing inventive marketing and advertising services. They excel in crafting compelling campaigns for renowned brands such as Waitrose, John Lewis, and EE, with a primary focus on narrative-driven consumer engagement. The agency's unique selling point centres on their dedication to inclusivity within the industry, demonstrated
Wavemaker UK, a London-based agency, provides an extensive suite of media, content and technology services aimed at enhancing business performance. Key services encompass media procurement and planning, content production and distribution, as well as development of data-driven strategies. Wavemaker's unique selling point lies in their fusion of breakthrough technology and consumer insights to yiel
Jellyfish is an integrated global digital marketing business founded in 2005 and headquartered at The Shard in London. Since June 2023 it has been part of The Brandtech Group, uniting media, creative and data through technology and generative AI.
AgencyIndex tracks 11 programmatic agencies in London. The list above is filtered to that intersection and ordered with verified and featured listings first.
For the wider editor's view on programmatic agencies in the UK, see the programmatic service brief. For context on London's marketing cluster, see the London location brief. The pricing, timeline and red-flag notes below apply to programmatic as a discipline; they do not change materially in London.
Specialist / boutique trading desk £2,000-6,000 mgmt fee + 10-20% DSP · Mid-market £4,000-15,000 + DSP fees · Network / holding-group £15,000-100,000+ on enterprise spend. Most credible agencies will not take programmatic-only briefs below ~£10k/mo media because DSP access fees stop making sense.
1-2wks DSP seat + billing + pixel and conversion setup · 1-2wks audience build, first-party data onboarding, creative trafficking (VAST for CTV) · 2-4wks CTV QA, brand-safety and SPO config, test campaigns. CTV and clean-room data flows push the upper bound.
- · Bundled 'all-in CPM' with no separated agency fee, DSP fee, data fee, and SSP cost breakdown
- · No supply path optimisation (SPO) strategy and no explicit Made-for-Advertising (MFA) exclusion list
- · No third-party verification via DoubleVerify, IAS, or MOAT (or sell-side-only reporting)
- · Refuses log-level data access or independent audit rights in the contract
- · Won't disclose rebates, principal-trading arrangements, or preferred-supplier incentives
- · Treats programmatic as 'retargeting + display network' rather than a CTV / DOOH / audio / open-web stack
Programmatic agencies in other cities.
Other services in London.
What brands ask about programmatic agencies.
The 5 questions our editors get most often, answered honestly. These apply to programmatic as a discipline regardless of city.