The best performance marketing agency in London is the one whose model fits your business: your budget, your channels, your sector and how involved you want to be. London has world-class options at every scale, from global networks to specialist boutiques. Below are ten strong agencies, what each is genuinely best for, and a checklist to help you choose.
Full disclosure: this list is written by Brightpace, and we’ve put ourselves at number one. We’d rather say that plainly than pretend to be neutral. Everything we say about the other nine is based on their own public positioning, and each is excellent at something, so use the “best for” labels to find your fit, even if it isn’t us.
How we chose
Every agency on this list:
- Serves London brands: nine of the ten are headquartered or have an office here; Brightpace works with London brands remotely
- Focuses on performance marketing: paid media and measurable growth, not just brand or creative
- Is established and credible: a clear specialism, a real client base and a transparent approach
We’ve ordered the list by who we’d recommend for a typical ambitious brand that wants senior, commercially focused paid media, which is, admittedly, the brief we built Brightpace around.
At a glance
| # | Agency | Best for | London presence |
|---|---|---|---|
| 1 | Brightpace | Senior, founder-led paid media without agency layers | UK-based, working with London brands |
| 2 | Brainlabs | Large brands wanting global, data-led scale | Headquartered in London |
| 3 | Jellyfish | Integrated media, creative and data on a global footprint | Headquartered in London (The Shard) |
| 4 | Croud | Multi-market campaigns with local specialists | Headquartered in London |
| 5 | Journey Further | Search-led, discovery-focused growth | London office (HQ Leeds) |
| 6 | Impression | Joined-up search, paid media and digital PR | London office (HQ Nottingham) |
| 7 | Found | Search visibility across Google, social and AI | London-based |
| 8 | The Social Shepherd | Paid social, creators and social commerce | London-based |
| 9 | Bark London | eCommerce performance marketing | London-based |
| 10 | Gripped | B2B SaaS and tech demand generation | London-based |
The 10 best performance marketing agencies in London
1. Brightpace
Best for: brands that want senior, founder-led paid media without the layers of a traditional agency.
Yes, this is us. Brightpace is a founder-led UK performance marketing partner, founded by a former Performance Marketing Manager at Ticketmaster. You work directly with the founder, not a rotating cast of account managers, across PPC and paid search, paid social, programmatic and the emerging channel of ChatGPT ads, plus consultancy for audits, in-housing and training.
Why we’d put ourselves first:
- Commercially focused. We optimise to revenue, margin and pipeline: not channel vanity metrics. Targets come from your economics; our free ROAS and CPA calculators show the maths.
- Flexible 30-day rolling contracts. No long tie-ins: we earn the relationship every month.
- Measured properly. Server-side tracking and clean conversion signals, so the platforms optimise toward real outcomes.
- One unified plan. Channels run as one media plan, not competing silos.
Worth knowing: we’re a deliberately small, senior operation. If you need a large team across dozens of markets, a global agency further down this list may suit you better.
2. Brainlabs
Best for: large and enterprise brands that want data-led paid media at global scale.
Brainlabs is a London-headquartered, independent agency offering full-service media, measurement and creative, spanning paid media, analytics, SEO and influencer marketing, with offices across several continents and a client list that includes major global brands. A strong fit when you need depth, scale and sophisticated measurement across many markets.
3. Jellyfish
Best for: global brands that want media, creative and data integrated under one roof.
Headquartered at The Shard, Jellyfish is a global digital marketing partner that brings together media, creative and data, with a strong emphasis on technology and AI-powered tooling. Well suited to organisations with complex, multi-country marketing operations and a heavy Google-ecosystem focus.
4. Croud
Best for: brands running campaigns across many markets that need local expertise.
London-headquartered Croud is an independent global media, creative and data agency. Its distinctive model pairs a core team with the “Croudie” network, an on-demand community of thousands of digital specialists across well over 100 markets, powered by its own technology platform. A good match for international brands that need native, in-market knowledge.
5. Journey Further
Best for: search-led brands focused on how customers discover them.
Founded in 2017 and headquartered in Leeds, with an office in London, Journey Further positions itself around “discovery-led” performance marketing: diagnosing where growth is constrained and engineering the signals that shape how customers find you. A strong option if search and discoverability sit at the heart of your growth plan.
6. Impression
Best for: joined-up search, paid media and digital PR.
Impression has offices in Nottingham, London, Manchester and New York, covering SEO, paid media, digital PR, social, analytics and conversion optimisation. Its “evidence into action” positioning suits brands that want organic search, paid media and PR working together rather than bought separately.
7. Found
Best for: search visibility across Google, social platforms and AI answers.
London-based Found describes itself as an AI-first “Everysearch” agency, covering SEO, PPC, paid social and content with a focus on being discoverable wherever people search, including LLMs and social platforms. A natural fit if you’re thinking about visibility in AI answers as much as classic search.
8. The Social Shepherd
Best for: paid social, creators and social commerce.
The Social Shepherd is a London-based social media agency with offices in Bath, New York and Miami, spanning social strategy, paid media, creative production, influencer marketing and TikTok Shop. The right call if social is your primary growth channel and creative and creators are central to it.
9. Bark London
Best for: eCommerce brands focused on profitable online growth.
Bark London is a London-based specialist performance marketing agency for eCommerce, combining paid media, creative and data science across paid social and paid search. Its focus on making paid media a predictable, profitable growth driver will appeal to online retailers scaling spend.
10. Gripped
Best for: B2B SaaS and tech companies.
Founded in 2017, London-based Gripped works exclusively with B2B SaaS and technology companies, offering demand generation, paid media, SEO and GEO for businesses scaling past early revenue milestones. If you sell software to businesses, a sector specialist like this speaks your language from day one. For more options, see our guide to the best B2B SaaS marketing agencies in the UK, and for paid search across the whole country, the 10 best PPC agencies in the UK.
How to choose a performance marketing agency in London
Whoever you shortlist, these questions separate a good fit from an expensive mistake (for the full version, see our 12-point checklist for choosing a PPC agency):
- What will they optimise to? Insist on commercial outcomes, revenue, profit, pipeline or booked customers, not clicks, CTR or platform-reported ROAS alone.
- Who actually works on your account? Ask to meet the people doing the day-to-day work, not just the pitch team.
- How long is the contract? Long minimum terms protect the agency, not you. Rolling contracts keep everyone accountable.
- How is performance measured? Look for server-side tracking, offline conversion imports and honest attribution, not double-counted platform numbers.
- Do they fit your stage and sector? A global network and a specialist boutique solve different problems. Match the model to your budget, markets and category.
- Will they show you the account? You should own your ad accounts and data. Before you commit, a proper account audit is a good test of how an agency thinks.
Frequently asked questions
What does a performance marketing agency do?
A performance marketing agency plans, runs and optimises paid media, search, social, programmatic and emerging channels, with success measured on outcomes like sales, leads and revenue rather than reach or awareness.
How much does a performance marketing agency in London cost?
It varies widely with ad spend, channels and scope. Common models include a monthly management fee, a percentage of ad spend, or a hybrid. More important than the fee is what the spend returns, and whether you’re locked into a long contract.
Should I choose a large or a small agency?
Large agencies bring scale, breadth and multi-market reach. Smaller, specialist or founder-led agencies typically offer more senior attention and flexibility. Choose based on how many markets you run, how complex your media is, and how close you want to be to the people doing the work.
In short
London’s best performance marketing agencies range from global networks to senior, founder-led specialists. Shortlist on fit, your budget, markets and sector, then judge each on what they optimise to, who runs your account, contract length and whether you keep ownership of your ad accounts.
If you’re a London business weighing up paid media specifically, our PPC agency London page explains how we approach the capital: targeting, pricing and fit.
Sources
Each agency’s own website, checked for services, clients and location. Last checked October 2026.
- Brainlabs, Brainlabs
- Jellyfish, Jellyfish
- Croud, Croud
- Journey Further, Journey Further
- Impression, Impression
- Found, Found
- The Social Shepherd, The Social Shepherd
- Bark London, Bark London
- Gripped, Gripped
Want to see if Brightpace is the right fit? Explore our media management or let’s chat about your paid media.
Want a senior eye on your paid media strategy?
Work directly with the founder: no juniors, no hand-offs, 30-day rolling contracts.