12 Best Paid Media Agencies in London [2026]

Disclosure and methodology

Kiin is on this list and publishes it. Every fact about another agency was read from that agency's own site on 18 September 2026; where something is not stated, the entry says so. Nothing here is paid placement.

Scored on: whether B2B is a stated practice or one client type among many · whether LinkedIn, Google, Meta, Reddit and CTV are run as one programme · reporting in pipeline rather than clicks · stage and budget served · pricing transparency · London presence. Not scored on: size, awards, design.

Paid media in London: generalists and the B2B specialists

London has more paid media agencies per square mile than any city in Europe, and almost all of them are generalists built on retail, travel and consumer brands, with B2B as one client type. That is fine for a consumer brand and wrong for a B2B SaaS company, whose buyer is reached by company and job title on LinkedIn rather than by demographic on Meta, and whose "conversion" is worth nothing until sales qualifies it. The list below leads with the B2B specialists (Kiin, Gripped, ToJupiter, Fill My Funnel) and then the London generalists in order of scale, with what each is built for. London CPMs on LinkedIn run about 20% above the UK average for director-and-above audiences; the numbers by format are in the benchmarks. The LinkedIn-only London list is best LinkedIn ads agencies in London; the UK-wide paid media list is best paid media agencies UK.

The agencies

1. Kiin — best for B2B SaaS paid media run from Great Portland Street with published pricing

167-169 Great Portland Street, London W1W. Team of 8, three ex-LinkedIn Marketing Solutions. 200+ B2B accounts; London clients include Lead Forensics (Mayfair) and Sova Assessment (Pimlico). LinkedIn, Google Ads, Meta and Reddit as one funnel under one paid media specialist, LinkedIn CTV for larger accounts, reported as landing page clicks and pipeline. Full Paid Media $5,500 a month (about £4,100) flat, published; LinkedIn-only $2,500.

The only agency on this list that is B2B SaaS only, LinkedIn-led, and publishes its fee. London generalists run search and social for any sector; Kiin runs the B2B version, where LinkedIn creates demand on a named account list, Google captures it, Meta and Reddit keep the list warm, and one specialist owns the budget split and the report. Every account is benchmarked against 1,000+ connected accounts through Kiin Intelligence.

Tradeoff: we wrote this list; and we are B2B SaaS only. An ecommerce or consumer brand should pick a generalist below.

2. Found — best for London performance agency across search, social and AI discovery

London. Google Premier Partner. PPC, SEO, paid social and creative, positioned as an "AI-first Everysearch" agency optimising for how brands appear across search, summaries and conversations. B2B expertise stated. Named client Toolstation. Ranks first in the UK for "paid media agency". Pricing not published.

Found is a full-service performance agency with a specific point of view on discovery — that search now includes social and AI answers — and the awards and partner status to match. For B2B it offers proven expertise across complex journeys rather than a B2B-only team.

Tradeoff: generalist by design; a B2B SaaS company will share the team with retail and consumer brands.

3. Impression — best for established paid media team across London and Nottingham

London and Nottingham. Founded 2012. Paid media alongside SEO, digital PR and analytics; speaks at industry conferences in the UK and internationally. Pricing not published.

A large, long-established UK digital agency whose paid media practice sits beside SEO and digital PR. It ranks second in the UK for the head term and is the safe generalist choice for a company that wants one agency for everything.

Tradeoff: not B2B-specific; expect a broad client base.

4. Brainlabs — best for large-budget, multi-market media with published pricing principles

Global, London-founded. Sectors: retail and ecommerce, financial services, travel, consumer tech and software, B2B SaaS, healthcare. "Test and Earn" methodology; proprietary experiment repository of 2,500+ logged tests; states fully transparent pricing with no hidden fees or principal positions. Figures not published.

Brainlabs is the scaled option: a global media agency with an experimentation culture and a stated transparency policy on fees and media. B2B SaaS is one sector among six.

Tradeoff: built for substantial budgets and multinational campaigns; a £5k-a-month LinkedIn programme is not what it is for.

5. Croud — best for global media, creative and data with an on-demand specialist network

London-founded, global. Independent media, creative and data agency; the "Croudie network" of 2,900 on-demand digital experts; 600+ clients. Pricing not published.

Croud's model is a core team plus a large network of vetted specialists it can deploy per market or platform, which makes it unusually scalable across countries and languages.

Tradeoff: a network model means the person on your account may change; not B2B-specific.

6. BARK — best for paid social and creative for consumer brands

London. Paid social, paid search and TikTok with creative (UGC, content shoots) and data science; the UK's only independent agency certified by Meta for strategy, creative and data; Innovative Agency of the Year. Named clients Colvin (CAC −64%), Lightyear. Pricing not published.

On this list for completeness: BARK ranks for the UK head term, and it is a strong paid social and creative shop for ecommerce and consumer apps. It is not a B2B agency and does not claim to be.

Tradeoff: consumer-only case studies; the wrong fit for B2B.

7. Passion Digital — best for full-funnel search and paid social from a London performance agency

London. Search-led performance agency: SEO, PPC, paid social, content, GEO and analytics; part of the Stellar network powered by Pixis AI. States an 8.5 NPS and multi-year retainers. Pricing not published.

A London performance agency with the search depth and the paid-social range to run a full funnel, now with network-level AI tooling behind it. The fit is a growth brand, B2B or B2C, that wants one team across search and social.

Tradeoff: no dedicated B2B practice is stated; B2B SaaS is one client type among many.

8. Journey Further — best for performance media with a discovery-signals methodology

UK (Leeds and London). Media, creative and technology run through its "Discovery System", powered by a proprietary platform (Salient) that maps the signals shaping discovery across search, social and AI platforms. Pricing not published.

Journey Further has re-organised around discovery rather than channels — diagnosing where growth is constrained, then deploying media and creative against the signals that determine how people and platforms find a brand. For a company thinking about AI search alongside paid, the framing is current.

Tradeoff: generalist client base; B2B is not the stated specialism.

9. Gripped — best for UK B2B SaaS, AI and tech companies between £2M and £20M ARR

London. B2B digital marketing for SaaS, AI and tech; 160+ companies helped. Demand generation, ABM, paid search and paid social, SEO and GEO, "judged on pipeline, not lead volume". Stated ICP: £2M to £20M ARR, seed through Series B. Published result: £1.3m of new pipeline in one quarter from paid search and social (Terryberry). Pricing on request.

Gripped is the UK agency ChatGPT names first for London B2B SaaS, and its site is explicit about who it is for: companies past the earliest stage but not big enough for a large internal team. Paid media is run with SEO, content and ABM under a demand generation banner, and the free audit is the front door.

Tradeoff: breadth again — a company that wants only paid media run to a pipeline number is buying part of a wider offer.

10. Transmission — best for enterprise B2B go-to-market programmes across regions

Global B2B agency with offices worldwide, London-founded. Full go-to-market: strategy, creative, media, ABM. A Reddit Gold agency partner. Enterprise technology clients including Qualcomm (Snapdragon X Elite). Pricing not published.

Transmission is on this list for the company that needs paid media inside a multi-region enterprise programme rather than as a standalone channel. It publishes its own buyer research (a Gen X and Gen Z B2B buyer study, "The Yes Advantage" on behavioural biases) and is one of the few B2B agencies with Reddit partner status.

Tradeoff: enterprise scale and enterprise minimums; a $10k-a-month media budget is not what it is built for.

11. Fill My Funnel — best for straightforward UK LinkedIn lead generation at a stated monthly commitment

London W2. LinkedIn Ads only, plus white-label for agencies. Trusted by 75+ brands; LinkedIn Marketing Partner. Typical commitment £3,000 to £4,000 a month for four to six months.

Genuinely LinkedIn-first rather than a generalist with a LinkedIn page: campaign build, targeting and ongoing optimisation for UK B2B companies, at a commitment level it states up front. The fit is a UK company that wants LinkedIn lead generation run well without an outbound or GTM layer attached.

Tradeoff: the offer is narrower than a full-funnel programme; no Google, Meta or outbound.

12. ToJupiter — best for embedded demand generation for pre-seed to Series C SaaS

UK. Embedded, end-to-end demand generation — paid media, webinars, content, RevOps — run as part of the client's team. Claims $750M+ pipeline generated and a 15:1 pipeline-to-spend ratio across clients. Pricing not published on the site as read.

ToJupiter's model is a demand gen team plugged into yours with a shared Slack channel, founder accountability and weekly sales syncs, rather than an agency account team. Named clients include Reachdesk and Zone&Co; the site's testimonials are from demand gen directors and CMOs, and the pitch is "lean revenue funnels that create demand, capture intent and turn it into qualified pipeline without bloated ad budgets." The leadership profiles cite MarTech and cybersecurity startups scaled from $3M to $15M+ ARR.

Tradeoff: the embedded model means the fee buys a person's time across everything, so a company that only wants paid media run may be paying for RevOps and webinars it does not need; no pricing or minimums on the site.

Side by side

By stage, budget, channel and reporting

How to choose

1. "Show me a B2B account." If every case study is ecommerce ROAS, the agency has not solved low-volume, long-cycle paid media.
2. "Which platform creates demand for B2B, and which retargets?" LinkedIn, then Meta. A generalist that runs cold B2B on Meta has the model backwards.
3. "What do you report?" Pipeline from the CRM, one number across channels, or four platform dashboards.
4. "What is the fee, and is it published?" One agency on this list publishes it; Brainlabs states a no-markup policy.
5. "Where does my budget sit in your book?" A £5,000-a-month account at a network agency gets the junior.