Performance marketing means different things to different people. Ask ten marketers and you’ll get ten answers - some will say paid search, some will say paid social, some will say anything with a trackable return. The most useful definition for ecommerce brands is simpler than that: performance marketing is any activity you can measure against revenue. And in 2026, the agencies doing it well are the ones that understand how your channels compound together, not just how each one performs in isolation.
Paid search drives demand capture. Paid social builds demand and awareness. Affiliates and partners extend your reach. Attribution tells you what’s actually working. Creative makes all of it perform better (or worse). The best performance marketing agencies hold all of that together, and connect it to the commercial goals that actually matter in your boardroom.
We’ve pulled together ten of the strongest performance marketing agencies in the UK right now, chosen for their ecommerce credentials, strategic depth, and track record with brands at real scale.
Genie Goals
📍 Cambridge, UK | Google Premier Partner | Meta Business Partner | Founding Member of the APMA
Genie Goals is a performance marketing agency that specialises in PPC, paid social, and affiliates and partner marketing, exclusively for ecommerce brands. Founded in Cambridge in 2008 and part of the £50M+ Genie Ventures group, the agency has spent over fifteen years building deep channel expertise for bold ecommerce brands who want to stay ahead, not just keep up.
Their ecommerce-only focus matters significantly. Their expertise and insights come from working exclusively with brands who sell products online. Over fifteen years, that compounds into something that generalist agencies simply can’t replicate: an understanding of what works across verticals, price points, channels, and growth stages.
The agency works with brands at different stages of the ecommerce growth curve - from founder-led businesses hitting a growth plateau and looking to test new channels without taking big risks, to ambitious investor-backed brands scaling fast across multiple channels and needing someone who can act as a senior, strategic partner rather than just another supplier.
What sets Genie Goals apart is the service model. Super-smart people are their superpower, and their staff sit at the heart of everything they do. Senior staff are hands-on throughout, not just at the pitch stage. And because they're deliberately selective about who they partner with, clients get genuine strategic attention rather than being passed around a team of junior account managers.
Genie Goals are a multi-award-winning agency. Most notably, they have achieved awards for Best Team in Performance Marketing at the Performance Marketing Awards in both 2025 and 2026, and have won a global Google award for shopping innovation. They are also proudly recognised as a Great Place to Work for 4 consecutive years.
Notable clients: Mamas & Papas, The Diamond Store, Cricut
Impression Digital
📍 Nottingham, London, Manchester, New York
Impression Digital is a performance marketing agency headquartered in Nottingham, with offices in London, Manchester, and New York. The 120+ strong team covers PPC, paid social, programmatic, SEO, digital PR, and CRO.
Impression has picked up strong recognition through 2026, including two wins at the European Search Awards and a haul of Global Agency Awards, among them Independent Agency of the Year and Integrated Agency of the Year.
Recent clients include Clarins, Specsavers, and Blinds 2go.
Nest Commerce
📍 London
Nest Commerce is a technology-led performance marketing agency working exclusively with ecommerce brands. Their whole proposition is built around Hummingbird, an in-house AI platform that connects performance data, creative analysis, and creative generation into one system.
The team of 60 specialists is led by co-founders Will Ashton (CEO) and Luke Jonas (CGO). Their thesis is that ad platforms reward creative volume and variety above almost everything else, so brands need far more variation than most teams can produce by hand. Nest pairs human strategists with AI-generated creative to close that gap.
Clients include Urban Outfitters, Vitabiotics, Hims, and Crew Clothing Company. Nest reports a 36% average year-on-year performance lift across its client base, alongside a 70% reduction in production time.
Brainlabs
📍 Global
Brainlabs was founded in 2012 by Dan Gilbert, who left Google to build the agency he felt the industry needed: one built around testing hypotheses rather than betting on a single big idea. Today it's grown to 1,000+ people across five continents, managing over $1.5B in media spend for 250+ brands, and is premier partner-certified across Google, Meta, Amazon, TikTok, Reddit, and LinkedIn.
Their Test and Earn methodology is backed by Hippocampus, a repository of more than 2,500 logged experiments built up over 13 years, meaning new client accounts draw on a proven library of hypotheses rather than starting from zero. Their Cortex AI platform, with 32 proprietary tools, reflects a broader shift toward agentic media management across the agency.
Brainlabs also runs the Brainlabs Academy in Buenos Aires, an intensive 24-month training programme rec
connective3
📍 Leeds, London, Manchester
Connective3 are a Google Premier Partner and Meta certified agency, with clients including Wren Kitchens, Ocado, and Compare the Market. Founded by Tim Grice, they’ve grown quickly and their offering spans PPC, paid social, digital PR, SEO, and CRO.
What sets them apart is their recent development of their own AI-powered marketing tool, C3x - a suite of intelligent marketing products that work together to uncover insights, predict performance, and uncover new opportunities.
Found
📍 London, New York
Found are a London-based performance marketing agency with an ‘Everysearch’ philosophy; the belief that performance marketing should capture demand wherever your customers are actively searching, not just on Google. Their client list includes Toolstation and Bonmarché, and they’ve been recognised as an Elite Digital and Top Independent Agency in the Drum UK Digital Agency Census.
Founded in 2005 as Artemis Eight before becoming Found in 2010, the agency now has 90+ marketing experts and is part of Tomorrow, an independent agency network that also includes data and AI consultancy Braidr and influencer agency Disrupt.
Journey Further
📍 Leeds
Journey Further was founded in 2017 on the idea that the industry had plenty of talent but too little integrity, and built its business around doing the work properly. Today it operates internationally, with a New York office opened in 2022, and was named Campaign's Global Performance Marketing Agency of the Year for two years running.
Their current proposition, the Discovery System, is built around the idea that being seen and being discovered aren't the same thing anymore: algorithms and AI platforms now decide what surfaces, so brands need to actively engineer the signals that get them found, understood, and chosen. It connects data, media, and technology into what they describe as one system rather than isolated channel optimisation.
s360 (formerly Reload Digital)
📍 UK, Europe
s360 are a 300+ strong European performance marketing agency operating across ten offices in seven countries. Their UK team is built on Reload Digital’s decade-long heritage of growing international consumer brands, and their model connects paid media, SEO, paid social, affiliate, and ecommerce consulting across multiple markets.
Clients include Wrangler, Victoria Beckham, Astrid & Miyu, and Philip Kingsley.
Croud
📍 UK, USA, Dubai
Croud is an independent global media, creative, and data agency, founded in 2011 by Ben Knight and Luke Smith with the aim of reinventing the agency model. It combines 600+ in-house digital experts with an on-demand network of 2,900 marketing specialists worldwide, giving it scale without the overhead of a traditional agency structure.
The Croud Group also includes Born Social, a social media specialist agency whose clients include Guinness, Ford, and Barclays, plus recent acquisitions in advanced analytics (MetaGeni) and luxury marketing. Croud was named Campaign Global's Independent Media Agency of the Year in 2025.
What to look for in a performance marketing agency
Performance marketing in 2026 is less about finding an agency that can run your channels and more about finding one that can connect them.
Consider questions like:
- How do they think about channels working together, and can they show you a case study where they’ve done it?
- How do they approach attribution and incrementality, beyond platform-reported data?
- Who will actually be working on your account, and how senior are they in practice?
- Do they understand ecommerce economics - contribution margin, customer acquisition costs, lifetime value - or do they talk primarily in ROAS?
An agency that can answer all four clearly, with specifics rather than generalities, is one worth talking to properly.
Want to talk through what the right performance marketing set-up looks like for your brand?
Get in touch with Genie Goals. We’ll give you an honest view of where the real opportunities sit, and what a smarter multi-channel strategy looks like for your stage of growth.
