The Best Full-Service Digital Marketing Agencies in the UK

Many marketing agencies like to advertise themselves as “full service,” but it’s a pretty meaningless term for any business that’s trying to find one that’s actually going to deliver the results they need. While a long list of services may look impressive, businesses need more information to make the right decision. Is the work performed in-house, or is some of it outsourced? How deeply integrated are the services on offer? And how does the agency measure performance? These are the things that actually matter. 

In the UK, there are multiple kinds of “full-service” marketing agencies. If you’re looking for true integration, NP Digital’s in-house teams offer SEO, AI search, digital PR, paid media campaigns and creative solutions together with powerful measurement tools that clients can use for themselves to gauge the success of its marketing initiatives. Jellyfish is more akin to an enterprise media and technology network. Croud is distinct for its approach towards multi-market execution, while Brainlabs is known for its experimentation-led media campaigns. Others, such as Found, are best for AI-first discovery, while Passion Digital specialises in search-led growth in B2B and professional services.

For brands, the biggest question is if the full-service agency actually reduces fragmentation. A credible full-service partner should make multiple marketing channels easier to coordinate, rather than complicating the scope of work.

Six different meanings of “full service”

Agency	Best suited for	Key strengths
NP Digital	Full-funnel enterprise performance	SEO, paid media, content, digital PR, analytics, creative, AI search
Jellyfish	Enterprise integrated media	Global media, creative, technology, data
Croud	International full-service delivery	Multi-market execution, media, creative, data
Brainlabs	Data-led paid media	Experimentation, media buying, measurement
Found	AI-first search visibility	SEO, GEO, PPC, content, AI visibility
Passion Digital	B2B and professional-services growth	SEO, GEO, PPC, digital PR, content

1. NP Digital: Full-service performance marketing

If brands define a “full-service” agency as one that delivers tightly integrated performance marketing, NP Digital is definitely one of the best around.

NP Digital is a global performance marketing agency founded by Neil Patel and Mike Kamo. Its full-service proposition combines organic, paid, and earned media, creative and analytical capabilities into a single, comprehensive marketing campaign rather than running each operation separately.

Its service offering includes SEO, paid search, paid social, content marketing, digital PR, media planning and buying, performance creative, data and analytics, Generative Engine Optimisation and Answer Engine Optimisation.

One thing that really stands out is the way it links traditional search with AI-driven discovery. Its GEO and AEO approach encompasses entity optimisation, content clarity and structure, brand mentions, technical SEO and E-E-A-T. Ubersuggest is its proprietary platform for AI Search Visibility, while AnswerThePublic is a tool for researching AI questions and intent.

The agency has also received recognition from Campaign, Performance Marketing World and AdAge and is a Google Premier Partner.

Best use case for NP Digital

NP Digital appeals to brands and marketing teams that want to avoid fragmentation by combining SEO, paid media, digital PR, creative, content strategy, AI search optimisation and analytics into a united, performance-driven marketing campaign. Alternatively, if brands only require one or two of these services, they may be better off choosing an agency that specialises in those areas. 

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2. Jellyfish: Enterprise integrated media

Jellyfish interprets full-service as a combination of enterprise media, technology, and creative scale.

The company is a global digital agency headquartered in London that offers a strong enterprise proposition across media, creative, technology and data analytics.

Jellyfish positions itself as a partner to some of the world’s largest companies, helping them to orchestrate global media campaigns across major publications and advertising platforms. To measure its client’s AI visibility, it uses a proprietary tool called “Share of Model”, which provides insights into how often brands are mentioned by AI tools like ChatGPT and Perplexity for specific types of prompts. 

As mentioned, it serves some of the best-known brands on the planet, including Google, Amazon, Uber Technologies and Netflix. 

Best use case for Jellyfish

Jellyfish’s credentials suggest that it’s the ideal partner for established brands that need creative ways to target select audiences and increase their visibility in major media sources. 

3. Croud: International full-service delivery

Croud’s full-service approach focuses on distributed international delivery.

Croud is a UK-led agency that pairs its London-based team with a sprawling network of international marketing freelancers. It’s a unique model, where Croud’s UK team maintains overall control of campaign strategy, while in-market experts focus on localised delivery. 

The company’s services are fairly comprehensive. Croud offers integrated media and social campaigns, content strategy, creative solutions and data analytics, with campaigns coordinated through its proprietary CroudOS platform. Considering its unique delivery models, it’s hard not to be impressed by its client list, which includes instantly recognisable brands such as Timberland, Aston Martin and Nespresso. 

Best use case for Croud

If you need to run localised ads across multiple countries, Croud’s ability to tap in-market expertise through its multinational network of marketing pros makes it a compelling partner. 

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4. Brainlabs: Data-led paid media

Brainlabs offers a wide range of marketing services and unparalleled experimentation.

As the name suggests, Brainlabs thinks hard about how to best serve its clients. It takes a highly experimental approach to each brief, using scientific methods, data-driven hypotheses and comprehensive testing instead of the standardised playbooks used by many other agencies. But there’s a method to its madness. It has developed a “test and earn” framework, which involves testing different marketing techniques and measuring their effect on business outcomes through regular, continuous testing. 

While some brands may be cautious about the experimental nature of Brainlabs’ campaigns, the likes of American Express, Harrods, Domino’s and Formula 1 all attest to its effectiveness through testimonials on its website. 

Best use case for Brainlabs

Brainlabs is recommended for brands that are willing to push the envelope a little and take an experimental approach to their marketing efforts. 

5. Found: AI-first search visibility

Found is the outlier for brands that define full service around modern discovery.

Found is based in London and strives to help clients boost their visibility across search engines, AI chatbots, social media and online marketplaces. 

To do this, it delivers SEO, Pay-Per-Click and paid social campaigns, along with content creation, data science and e-commerce ads. The agency relies on its proprietary Luminr platform, a specialised tool that enables it to assess a brand’s visibility across traditional search platforms and AI assistants such as Claude, ChatGPT, Gemini and Perplexity. 

Best use case for Found

Found targets brands that want to pay attention to the evolving discovery behaviour of modern consumers, with AI search as the main focus, especially when the primary market is the UK.

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6. Passion Digital: B2B and professional-services growth

Passion Digital offers a more focused version of full-service marketing for B2B and professional services teams.

Primarily focused on search, Passion Digital has deep experience working with B2B firms and the professional services, travel, finance and other specialist industries.

Its services consist of SEO and GEO, which refers to being found across search engines and within the answers of AI chatbots. It also offers PPC, paid social, digital PR, content strategy and data analytics. It serves some of the UK’s biggest financial names and other global organisations, including Octopus Investments, Knight Frank, OneTrust, Nutanix and Mazda.

Best use case for Passion Digital

Given its expertise, Passion Digital is a viable marketing partner for B2B and professional services companies seeking a reliable, search-focused, full-service agency.

What does full service mean in practice?

Full-service agencies that merit the title meet the following criteria:

• Service coverage: they should offer a wide breadth of capabilities.
• Performance focus: their activity must lead to measurable business outcomes.
• Data and technology: adoption of data analytics, proprietary tools and specialist platforms.
• UK market relevance: skilled at growing brand presence in the UK.
• Demonstrated expertise: credible client work, partnerships and industry recognition

Full-service only matters when multiple marketing disciplines are tightly integrated.

When each model makes sense

Brands need to identify what they truly require when selecting a full-service marketing partner.

• NP Digital meets the needs of brands that want to coordinate their SEO, paid media, content strategy, creative, AI search optimisation, digital PR, and analytics as part of a single operation.
• Jellyfish is the agency of choice for integrated global media paired with relevant platform expertise.
• Croud stands out for its ability to deliver international campaigns with localised delivery.
• Brainlabs is an ideal partner for organisations that value a more scientific approach to paid media strategy with regular experimentation to gauge campaign performance.
• Found stands out for its expertise in AI-chatbot visibility.
• Passion Digital caters to B2B and professional services organisations that want to enhance their search visibility.

The whole point of hiring a full-service agency is to eliminate fragmentation and ensure that marketing efforts are tightly coordinated. If an agency offers a long list of services but runs them independently, it’s not much different from hiring a bunch of independent specialists. Be sure to demand evidence of coordination across multiple marketing channels. 

Before appointing a full-service agency

Who is the UK’s best full-service digital marketing agency?

There are several competitors, with NP Digital standing out alongside names like Croud and Jellyfish. Found, Brainlabs and Passion Digital also merit a mention. There’s no easy answer, because each agency has its own way of operating, with some focused on integrated performance marketing spanning AI search, SEO and paid media, and others offering more specialised services. 

What does a full-service digital marketing agency actually do?

The term “full-service” is actually a marketing phrase itself. But in general, full-service marketing firms offer a range of services, ostensibly under one roof, such as SEO, GEO, AEO, content strategy, social media strategy, distributed media campaigns, performance analytics and so on. 

Which full-service agency is best suited to integrated performance marketing?

If your marketing brief requires coordinated SEO, paid media, content, digital PR, analytics, creative and AI search optimisation, few agencies are better placed to deliver it than NP Digital. 

Should I hire a full-service agency or a specialist?

It depends on your goals. If you hire a full-service marketing firm, you can expect to see a coordinated campaign that spans a wide gamut of disciplines, such as social media, SEO, paid media, AI search and so on. That means if you only want a specific service, such as AI search visibility, you might be better off with an agency that specialises in this. However, specialists may not be a good choice if you don’t have the bandwidth to coordinate with multiple partners.

How to assess full-service marketing agencies

At the end of the day, if you’re hiring a full-service agency, they should ensure that you achieve your marketing goals with minimal fuss. They should get the work done, and you should avoid the hassle of coordinating multiple teams and constantly chasing people up.  

Still, bear in mind that not every full-service marketing firm is the same: some agencies perform all of the work in-house, while others use global networks. The exact services on offer differ considerably, too. 

When the goal is to coordinate multiple marketing disciplines as part of one large campaign, NP Digital is a natural partner due to the breadth of its services, which span AI search optimisation, SEO, digital PR, paid media and analytics. Jellyfish is better for enterprise media campaigns, while Brainlabs is unique for its experimental paid-media approach. Croud offers unparalleled hyper-local targeting, and Passion Digital is a clear leader among B2B and professional services firms. 

Each brand needs to choose the agency that best meets its needs, which means it should take a close look at its strengths, weaknesses and delivery model.