Best Marketing Agencies in London: 7 Firms to Know

Finding the right marketing agency in London can be harder than finding an agency in the first place. The capital has firms specialising in SEO, paid advertising, social media, branding, content, web development, PR and broader digital strategy, alongside agencies that combine several of these disciplines.

That variety is useful, but it also means that a business looking for “marketing agencies in London” can quickly end up comparing companies that do very different jobs.

A specialist SEO agency may be the right choice for an organic search problem. An ecommerce brand might need paid media, creative production and conversion optimisation working together. A company preparing for a rebrand may need positioning and brand strategy before it spends anything on advertising.

This guide looks at a selection of established London agencies and explains what each is known for, the types of work it offers and the kind of business brief it may suit. It is not a league table or a claim that one agency is universally better than another.

The agencies featured are Found, Propeller, Bird Marketing, Burst Digital, Favoured, Mischief and Sonder & Tell. Their service mix ranges from performance marketing and SEO to branding, creative communications, PR and brand strategy.

What does a marketing agency do?

A marketing agency helps a business plan, create, deliver or measure activities designed to reach its target customers.

The exact work can vary considerably. A full-service marketing agency might handle strategy, branding, SEO, paid advertising, social media, content and analytics. A specialist firm may concentrate on one area, such as search engine optimisation, performance advertising or brand communications.

Common marketing agency services include:

• SEO and technical SEO
• Pay-per-click advertising
• Paid social media
• Social media management
• Content marketing
• Digital PR
• Email marketing
• Brand strategy
• Brand identity and creative
• Website design and development
• Conversion rate optimisation
• Market research
• Analytics and reporting
• Influencer marketing
• Campaign planning

Google describes SEO as the process of helping search engines understand content and helping users find a website through search. It also stresses that there are no shortcuts that guarantee a first-place ranking.

That distinction matters when choosing an agency. A business should be buying expertise and a clearly defined process, rather than a promise of guaranteed rankings or guaranteed sales.

Marketing agencies in London: the firms to know

There is no sensible single ranking of London marketing agencies because the services are too different.

Instead, the following firms represent several of the main approaches businesses will encounter when researching agencies in the capital.

Agency	Main strengths	London base	Particularly relevant for
Found	SEO, PPC, paid social, digital PR, data and AI	Hatton Garden	Performance-led digital marketing
Propeller	Digital strategy, SEO, web, social, paid media, CRO	Islington	Hospitality, food, travel and retail
Bird Marketing	Digital marketing, SEO, creative and web	City of London	Businesses wanting broad digital support
Burst Digital	Branding, web design, SEO, social and growth marketing	New Kent Road	Start-ups and growing brands
Favoured	Performance marketing, creative, acquisition and conversion	London	Full-funnel growth campaigns
Mischief	PR, creative campaigns, social, influencers and experiential	Great Portland Street	Consumer brands and cultural campaigns
Sonder & Tell	Brand strategy, positioning, storytelling and copy	West London	Brand positioning and messaging

The table is intended as a starting point rather than a ranking. Services and agency positioning can change, so businesses should confirm the current scope directly before commissioning work.

Best Marketing agencies in London

1. Found

Found is a London-based digital marketing agency with its office at 77 Hatton Garden, EC1N 8JS. Its current service range includes SEO, PPC, paid social, programmatic advertising, digital PR, content marketing, data and AI, analytics and conversion rate optimisation.

Found also has a strong emphasis on the changing search landscape. Its current proposition includes GEO and AEO services, alongside its own Luminr platform for monitoring brand visibility across search engines, social platforms and AI systems.

For businesses comparing digital marketing agencies in London, that makes Found particularly relevant when the brief involves several performance channels rather than one isolated activity.

Services include

• SEO
• PPC
• Paid social
• Digital PR
• Content marketing
• Data science
• AI and automation
• Analytics
• CRO
• Digital strategy

Found says it has worked with brands including Toolstation, Bonmarché, Puma, TOMS and Adecco. Its website also lists Google Premier Partner status and a 2026 UK Digital Excellence Award for Standout PPC Agency of the Year.

Consider Found if your business needs a performance-focused digital programme covering search, paid media, content, and measurement.

Potential limitation: a smaller business looking for only occasional social media support may not need such a broad digital capability.

2. Propeller

Propeller Digital

Propeller Digital operates from Colebrooke Row in London and positions itself as a digital agency focused on sustainable digital growth. Its services span AI SEO, web development, conversion rate optimisation, analytics, social media and paid media.

Propeller has a particularly clear sector focus. Its website identifies hospitality, food and drink, hotels and travel, luxury, retail, members’ clubs, property and professional services among the industries it works with.

That can be useful for businesses where the website and digital customer journey are closely connected to bookings, enquiries or transactions.

The agency highlights work with names including Twinings, Young’s and Incipio Group, with published case-study figures covering conversions, mobile sales, audience reach and engagement. These are agency-reported case-study results, not independent performance assessments.

Services include

• SEO
• Website development
• Paid media
• Social media
• CRO
• Analytics
• Digital strategy
• Digital experiences

Consider Propeller if you operate in hospitality, food and drink, travel, retail or a related sector and need the website, search, social and paid activity to work together.

Potential limitation: a business looking purely for corporate brand strategy or traditional PR may need a different specialist.

3. Bird Marketing

Bird Marketing is a multi-service digital agency with a London office at Austin Friars, EC2N 2HE. Its current offering covers technical web work, digital marketing and creative services.

Its digital marketing proposition includes SEO, social media, paid advertising and multi-channel campaigns. The agency also operates from locations outside London, including Essex and Glasgow.

Bird describes itself as a full-service digital marketing agency and publishes client reviews through several third-party platforms. It currently lists a London office at 13 Austin Friars.

Services include

• SEO
• Digital marketing
• Paid advertising
• Social media
• Web development
• Creative services
• Technical web services
• Multi-channel marketing

Consider Bird if you want one agency covering several areas of digital marketing rather than commissioning separate SEO, web and creative suppliers.

Potential limitation: businesses seeking a highly specialised discipline may want to compare Bird with a specialist agency before deciding.

4. Burst Digital

Burst Digital has a London office on New Kent Road, SE1 6FW, alongside locations in New York and San Francisco. The agency describes itself as a branding and marketing agency combining brand work with digital execution.

Its service mix covers branding, web design, SEO, social media, digital marketing and growth activity. Its London digital marketing offering includes PPC, paid social and conversion-focused work.

The agency also publishes case studies involving businesses such as Cogency Global and Vivienne Westwood.

Services include

• Branding
• Brand identity
• Web design
• SEO
• PPC
• Social media
• Content
• Growth marketing
• CRO

Consider Burst Digital if you’re launching a new business, refreshing a brand, or looking to connect branding and digital marketing under one agency.

Potential limitation: businesses that already have a strong brand identity but need highly specialised search or media buying may prefer a narrower specialist.

5. Favoured

Favoured describes itself as a full-funnel performance marketing and creative agency based in London.

Its current service model covers three broad areas: creative, acquisition and conversion. These include social advertising, Google PPC, TikTok advertising, influencer marketing, SEO, email marketing, CRM, automation, customer journeys and conversion optimisation.

That full-funnel approach is useful for companies that do not simply want more website visitors but need to understand what happens after someone encounters an advert or piece of content.

Favoured says it has worked with more than 300 brands and identifies startups, apps, ecommerce, hospitality, leisure and B2B among its client sectors.

Services include

• Paid social
• Google PPC
• TikTok advertising
• Influencer marketing
• SEO and ASO
• Email marketing
• CRM
• Automation
• CRO
• Creative production

Consider Favoured if: customer acquisition, paid media and conversion are central to the brief.

Potential limitation: a company primarily looking for long-term corporate reputation or traditional PR may need a communications specialist.

6. Mischief

Mischief takes a different route from a conventional performance marketing agency.

Based at 60 Great Portland Street, London W1W 7RT, Mischief describes itself as a creative PR and communications agency. Its work covers creative campaigns, earned media, press office, influencer and talent partnerships, experiential activity, social impact and other communications services.

The agency says it has worked with brands including Samsung, Coca-Cola, Just Eat, E.ON, Channel 4 and Experian.

Its published work includes campaigns involving cultural events, influencer activity, sponsorships, consumer PR and experiential campaigns.

This is a useful distinction for companies researching marketing agencies in London: sometimes the problem is not search visibility or paid acquisition. It may be brand awareness, media attention, or finding a creative idea that people will talk about.

Consider Mischief if: you need PR, creative campaigns, influencer activity, or experiential marketing.

Potential limitation: it may not be the natural starting point for a small business looking for a straightforward local SEO or PPC retainer.

7. Sonder & Tell

Sonder & Tell is a London brand strategy and communications agency focused heavily on positioning, storytelling, and language.

Its services include brand strategy, positioning, tone of voice, naming, copywriting, content strategy and creative communications.

That makes it different from a paid media agency. If a company has a good product but struggles to explain what makes it different, the problem may be strategic rather than promotional.

Sonder & Tell’s published work includes Yoto, Octopus Legacy, Mindful Chef, KatKin, Purplebricks and Wild Nutrition.

The agency says its team draws on backgrounds in marketing, copywriting and journalism and describes itself as solving business problems with language.

Consider Sonder & Tell if you need clearer positioning, messaging, brand storytelling or tone of voice.

Potential limitation: it is not primarily a PPC, SEO or media-buying agency.

How to choose between marketing agencies in London

The biggest mistake is starting with the agency rather than the problem.

Before arranging meetings, write down what you actually need the marketing to achieve.

For example:

• More local enquiries
• More ecommerce sales
• Better organic search visibility
• More qualified B2B leads
• A new brand position
• Stronger social media performance
• Greater media coverage
• Better website conversion rates
• A launch campaign
• International expansion

The answer will narrow the field considerably.

Match the agency to the job

Your main objective	Agency type to investigate
Improve Google visibility	SEO/digital marketing agency
Increase paid search traffic	PPC/performance agency
Grow ecommerce sales	Performance + CRO agency
Build a new brand	Branding/strategy agency
Improve messaging	Brand strategy/copy agency
Generate media coverage	PR/communications agency
Grow through social advertising	Paid social/performance agency
Rebuild a website	Digital/web agency
Manage several channels	Full-service marketing agency
Reach younger audiences	Social, influencer or creative agency

There is no need to pay for a full-service agency if you only have one clearly defined problem.

What should you ask a London marketing agency?

A good first conversation should be specific.

Ask:

1. Who will actually work on the account?

The senior people presenting a pitch are not necessarily the people delivering the campaign.

Ask for the proposed team and understand their roles.

2. Can you show relevant case studies?

Look for work involving a similar business model, audience, or objective.

A famous client logo does not automatically demonstrate relevant expertise.

3. What will you measure?

For SEO, this could include organic visibility, qualified traffic, and conversions.

For paid advertising, it could include cost per acquisition, revenue, or return on ad spend.

For PR, relevant measures could include coverage quality, reach, referral traffic, or changes in brand awareness.

4. What does the monthly fee include?

Clarify:

• Strategy
• Meetings
• Reporting
• Content
• Design
• Media management
• Ad spend
• Development
• Third-party software
• Consultancy

Agency fees and advertising budgets are often separate, so make sure you understand the total cost.

5. How long is the contract?

Ask about:

• Minimum term
• Notice period
• Set-up fees
• Cancellation terms
• Ownership of creative assets
• Ownership of accounts and data

These details matter if the relationship later changes.

How much do marketing agencies in London cost?

There is no single standard London agency price.

The cost depends on the service, size of the business, complexity of the campaign, agency seniority, and amount of work required.

Directory data illustrates how wide the market is. Sortlist’s London listings include agencies with published starting budgets ranging from relatively small projects to substantially larger engagements, while its 2026 London overview estimates that campaign costs can vary considerably according to business size and scope.

Treat directory figures as indicative rather than quotations.

A useful way to think about agency costs is:

Type of work	What affects the cost most
SEO	Website size, competition, technical issues and content requirements
PPC	Management fee plus advertising spend
Social media	Number of platforms, content volume and creative requirements
Branding	Research, strategy, identity and number of assets
Web design	Number of pages, functionality, CMS and integrations
PR	Campaign ambition, media relations and creative production
Full-service marketing	Number of channels and strategic involvement

The cheapest quote is not necessarily the lowest-cost option. An inexpensive agency that delivers little useful work can cost more than a specialist that solves the problem efficiently.

SEO, PPC or social media: which marketing service do you need?

These channels do different jobs.

SEO

SEO is generally a longer-term approach to improving visibility in organic search.

It can be valuable for businesses that want to build a consistent source of relevant search traffic, particularly where customers actively research products or services before buying.

Google advises that changes in search performance can take anything from weeks to months to become clear, depending on the change and circumstances.

PPC

PPC allows businesses to pay for advertising placements, with Google Ads offering control over campaign objectives, keywords, budgets, and targeting.

The advantage is speed: campaigns can begin generating traffic once launched. The trade-off is that advertising spend continues while the campaigns are running.

Social media

Social media can support awareness, engagement, community building, and paid customer acquisition.

The right platform depends on the audience and business model. A B2B company, for example, may have very different requirements from a fashion retailer or restaurant.

Pros and cons of using a marketing agency

Pros

• Access to specialist skills
• Less need to recruit internally
• Ability to combine several marketing channels
• Access to specialist software and tools
• External perspective on strategy
• Potentially faster implementation
• Flexible access to expertise

Cons

• Ongoing agency fees
• Time needed to manage the relationship
• Results can take time
• Quality varies between agencies
• Some agencies may be stronger in one discipline than another
• A poor brief can lead to wasted spend

The best agency relationship is usually based on a clearly defined commercial problem rather than a vague instruction to “do more marketing”.

A simple process for choosing an agency

Step 1: Define the objective

Write one or two measurable objectives.

For example: “Increase qualified organic enquiries” is more useful than “improve our marketing”.

Step 2: Decide what expertise you need

Choose between SEO, PPC, social, branding, PR, web development, or a combination.

Step 3: Shortlist three to five agencies

Look for evidence of relevant experience rather than simply collecting the biggest names.

Step 4: Request proposals

Give each agency the same basic brief so the proposals can be compared fairly.

Step 5: Check the details

Compare scope, team, reporting, contract length, fees, and expected deliverables.

Step 6: Ask how success will be measured

A credible proposal should explain what will be tracked and why.

Step 7: Check the contract

Make sure you understand ownership, notice periods, fees, and advertising expenditure before signing.

What makes a good marketing agency relationship?

Marketing rarely works well as a black box.

The client should understand what is being done, why it is being done and how performance will be assessed.

That means regular reporting matters. It also means the business needs to provide useful information about customers, margins, sales cycles and commercial priorities.

For SEO in particular, businesses should be wary of agencies making guarantees about Google rankings. Google’s own guidance explicitly says that nobody can guarantee a first-place ranking in its organic results.

For advertising, ask how budgets are controlled and how campaigns are measured. For branding, ask how strategic decisions will be validated rather than relying solely on subjective design preferences.

Marketing standards and compliance in the UK

Marketing is not simply about creativity.

UK businesses and their agencies also need to consider advertising and consumer-protection requirements.

The Advertising Standards Authority says the CAP Code is the rule book for non-broadcast advertising, sales promotions and direct marketing communications, and it applies to advertisers, agencies and media.

The CAP Code also states that marketing communications must be obviously identifiable as marketing.

That is particularly relevant when an agency manages influencer campaigns, advertorial-style content, promotions or other forms of commercial communication.

Businesses should therefore ask prospective agencies how compliance is handled, especially when campaigns involve regulated products, influencers, competitions, health claims or financial services.

Why London has so many different types of agencies

London’s marketing industry is unusually broad because the city contains businesses ranging from technology companies and financial services firms to hospitality groups, retailers, professional services companies, fashion brands and start-ups.

That diversity is reflected in agency specialisms.

You will find digital agencies around areas such as Shoreditch, Clerkenwell, Farringdon and the City, while central London neighbourhoods including Soho, Fitzrovia and Marylebone have long been associated with creative, advertising, communications and media businesses.

The important point for a client is that a London address alone does not determine whether an agency is suitable.

Sector knowledge, relevant case studies, team experience and a clear commercial understanding of the brief matter much more.

Quick summary: finding the right London agency

If you are comparing marketing agencies in London, start with the objective rather than the agency name.

For performance-focused digital marketing: Found and Favoured are worth investigating.

For hospitality, food, travel and digital experiences: Propeller has a clear sector focus.

For broader digital marketing and web support: Bird Marketing and Burst Digital cover multiple disciplines.

For PR and creative communications: Mischief is a specialist option.

For brand positioning and messaging: Sonder & Tell offers a more strategy- and language-led approach.

These descriptions are based on each agency’s current published services and positioning. They are not independent performance rankings, and businesses should request current proposals before making a purchasing decision.

7. FAQ

Wrap-up

London has no shortage of marketing agencies, but the sheer number of options makes choosing one more complicated, not less.

A useful starting point is to define the business problem. If you need search visibility, look closely at SEO experience. If customer acquisition is the priority, compare performance marketing and paid media expertise. For a new positioning or rebrand, brand strategy may need to come first. And if the objective is public attention, reputation, or cultural relevance, a PR and communications agency may be the better fit.

Before signing a contract, compare agencies on relevant experience, proposed team, scope, reporting, fees and measurement rather than relying on awards or big-name client logos alone.

For businesses researching marketing agencies in London, a shortlist of three to five relevant firms should give you enough information to compare approaches, ask better questions and identify the type of agency that fits the job.