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List of TOP 28 Advertising Agencies in London. Discover the most skilled marketing agencies from our community to outsource your marketing to.
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With data-driven SEO strategies and advertising campaigns, we help businesses impact the metrics that matter most, from traffic to revenue. Use the power of search on any platform to boost your sales.
London, England, United Kingdom +4
Advertising, Programmatic Advertising +36
Home Services, Insurance +29
Starting from $1,000
More Traffic, More Customers, More Revenue. We can help you succeed, no matter your business size. 800,000+ First Page Rankings $41,762,176+ Revenue Generated for Clients. Beat the Competition with ROI-Focused Digital Marketing. Free Analysis & Quote
London, England, United Kingdom +4
Advertising, Programmatic Advertising +46
Home Services, Insurance +29
Any
Grow your client base & drive revenue with Elit-Web, an award-proven digital marketing company that has helped thousands of brands attract traffic, win leads and online transactions. Unlock online growth with data-driven digital solutions today!
London, England, United Kingdom +4
Advertising, Native Advertising +63
Home Services, Insurance +29
Any
We are a strategic marketing partner to B2B organisations - focused on helping our clients grow through data-led insight, intelligent strategy, and hands-on collaboration.
London, England, United Kingdom
Advertising, Native Advertising +23
Insurance, Fintech +3
$2,500 - $10,000
Ink Digital is a UK SEO agency delivering transparent, ROI-led growth. UK Search Awards 2025 winners. We specialise in technical SEO, content strategy and digital PR, plus PPC and web design and development for travel, hospitality, ecommerce & B2B.
London, England, United Kingdom
Advertising, PPC +6
B2B Services, Restaurants +1
Starting from $2,500
Top Notch Dezigns is an award-winning digital agency that is passionate, dedicated, and committed toward delivering excellent results. We take pride in our outstanding communication skills, and make it a point to exceed our clients’ expectations.
London, England, United Kingdom +2
Advertising, Native Advertising +44
Ecommerce, Manufacturing +3
$1,000 - 2,500
$2,000
2023
28 months
Challenge
International Patient Growth – Case Study 🎯 What Was Required? • Generate qualified international patient demand in Hair Transplant, Aesthetics and Dental • Reduce CPL and appointment costs, increase ROAS • Establish a multilingual, multi-country, scalable performance model • Increase trust and persuasion with professional production (video & photography) to support advertising
Solution
🧭 What We Did? (Lein Approach) • Performance architecture: Meta Ads + Google Search + WhatsApp-based conversion tunnel • Service-based setups: Separate campaign sets and messages for Hair Transplant / Aesthetics / Dental • Localization: We adapted the language/message/creatives to the target country and service • Quick optimization: Creative & landing A/B tests, weekly bid adjustments • Production integration: Doctor introduction in the clinic environment, patient testimonial, before/after video–photo sets; advertising and landing
Result
Outcome & Value Lein Digital implemented a service-based, multilingual, and production-supported performance growth model for Vialife Clinic. Expected output: CPL ↓, appointment cost ↓, ROAS ↑, and a scalable international patient flow. • Spend (monthly): $8,000 • Lead (Form + WhatsApp): 1,680 (Ø) • CPL (Ø): $7 • Appointment Conversion (Ø): 26–32% • Revenue per Patient (Ø): $3,500–$4,800 (depending on the service) • ROAS (Ø): 8–10x
Since our inception in 2018, we've empowered businesses to find their voice, make decisive choices, and seize opportunities in an ever-evolving industry.
London, England, United Kingdom +4
Advertising, Native Advertising +63
Home Services, Insurance +29
Any
Boost your brand visibility and get quality inbound leads looking for expert help.
Sierra Six Media is a Drum Recommends agency delivering SEO, PPC, web design, and branding with precision and transparency. We align strategies to business goals, integrating seamlessly with clients to drive accountable, long-term growth.
London, England, United Kingdom
Advertising, PPC +7
Ecommerce, B2B Services +1
$2,500 - $5,000
We're a digital marketing agency for growth brands. We use creative, data-driven, strategic thinking and the latest innovations across all things search to deliver consistent monthly growth to our clients.
London, England, United Kingdom
Advertising, Programmatic Advertising +7
Fintech, Real Estate +1
$5,000 - 10,000
We're an agency that understand the complexities of both marketing and running a business. Our approach blends data analytics with consumer psychology to deliver campaigns that resonate and drive revenue growth.
London, England, United Kingdom +1
Advertising, PPC +6
Ecommerce, Legal Services +3
$1,000 - 2,500
FlyPost Marketing helps small and growing businesses get found, get noticed and turn more of that attention into leads. We specialise in SEO & AI visibility, PPC, Local SEO, social media and practical website support.
London, England, United Kingdom
Advertising, PPC +7
Ecommerce, Agriculture +1
$2,500 - $10,000
We help Ambitious and Challenger brands realise their goals online. Working for them and with them to forensically improve their Search & AI optimisation and target new opportunities.
London, England, United Kingdom +2
Advertising, Display Ads +34
Ecommerce, Manufacturing +3
Starting from $1,000
$1,500
2024
12 months
Challenge
🎯 What was Required? • Generating qualified traffic and purchasing for collection launches and in-season sales in Türkiye • Accelerating new customer acquisition (CAC control) and increasing ROAS • Establishing a collection/product-based data-driven campaign model (lookbook → basket → purchase) • Achieving scalable growth with performance while preserving brand aesthetics
Solution
🧭 What We Did? (Lein Approach) • Performance architecture: Meta Ads + Google Shopping/Performance Max + Shopify • Catalog & feed optimization: Variant product feeds (size/color), dynamic stock–price sync • Funnel design: Awareness (video/lookbook) → Consideration (reels, collection page) → Purchase (dynamic cart retrieval) • Creative production + whitelisting: We used UGC/creator and editorial content in media buying with whitelisting • Quick optimization: Creative & landing page
Result
Result & Value Lein Digital builds a catalog/data-driven, production-supported, scalable growth model for Özgür Masur, suitable for the Turkish market. Expected output: • CAC (CPA) ↓, ROAS ↑, New customer share ↑, AOV maintained/increased • Rapidly scalable performance and sustainable profitability during launch and discount periods Sales exceeded 2 million Turkish Lira in just one week.
Nautilus Marketing is a full service digital marketing based in London, boasting a varied national & international client base. We pride ourselves on our customer service and excellent workforce. Our Nauti Nerds are unlike any nerd out there,
London, England, United Kingdom
Advertising, Native Advertising +41
Legal Services, Dental +2
$1,000 - 2,500
We are a global digital marketing and communications agency, empowering visionary technology companies to change the world for the better by bringing clarity through ideas, influence, and impact.
London, England, United Kingdom +2
Advertising, Native Advertising +50
Insurance, Fintech +9
Starting from $5,000
From marketing strategy, website building and PPC, to TikTok Shop, social media management, and analytics. We provide a full suite of digital marketing services to take your business to the next level.
London, England, United Kingdom
Advertising, Display Ads +23
Ecommerce, Health & Wellness +3
Starting from $1,000
For ambitious people who want to grow their business, Nerd is an award-winning marketing agency for a digital age. This dedicated team will help you to better understand your customers, create cool digital things and sell more of your stuff.
London, England, United Kingdom
Advertising, Retargeting and Remarketing +7
Healthcare & Hospital, Food & Beverages +1
Starting from $1,000
We are the digital growth experts. As an award-winning provider of digital marketing and websites to leading brands, we’ve worked for more than a decade with one key goal in mind - to get businesses more customers online.
London, England, United Kingdom +2
Advertising, Programmatic Advertising +41
Fintech, Healthcare & Hospital +3
Any
GA Agency is an award-winning international digital marketing agency helping brands all over the world grow their business and revenue in the online space.
London, England, United Kingdom
Advertising, Programmatic Advertising +21
Ecommerce, Food & Beverages +3
Starting from $2,500
$3,000
2024
8 months
Challenge
International Bariatric Surgery – Case Study 🎯 What Was Required? • Generate qualified international patient demand in Romania, UK, Germany and New Zealand • Reduce CPL and appointment costs, increase ROAS • Establish a multilingual, multi-country, scalable growth model
Solution
🧭 What We Did? (Lein Approach) • Performance architecture: Meta Ads + Google Search + WhatsApp-based conversion tunnel • Localization: We adapted the language/message/creatives on a country-by-country basis • Rapid optimization: Creative & landing A/B testing, weekly bid adjustments • Operational rhythm: Clear playbook for lead response time, repeat outreach and appointment tracking
Result
KPI Summary (3 Months) • CPL: 30% ↓ • Lead → Appointment: 52% ↑ • ROAS: 10x Result & Value Lein Digital established a scalable performance model in a multi-country/multi-lingual structure: • CPL decreased by 30%, ROAS increased by 10x, appointment conversion increased by 52% • Measurable, repeatable, profitable growth infrastructure in health tourism
Zeo Agency, established on December 12, 2012, is recognized as one of the largest digital marketing agency in Turkey. The agency offers a range of services including SEO, GEO, AEO, SEM, performance marketing, content marketing and generative AI.
London, England, United Kingdom +2
Advertising, Display Ads +21
Fintech, Healthcare & Hospital +3
Starting from $2,500
CRKLR are a performance marketing agency with a difference; we put content as well as data at the heart of performance. We optimise and amplify your content across paid and organic channels from search to social to deliver exceptional results.
London, England, United Kingdom
Advertising, Programmatic Advertising +7
Ecommerce, Fashion Retail +1
Starting from $2,500
Your clients don't just Google anymore. MagnifyLab gets legal, professional services, property and home services brands found in search and cited by AI. 20+ years of senior-led PPC, SEO and AI search visibility. No juniors. No vanity metrics.
St Albans, England, United Kingdom
Advertising, Video Marketing +7
Home Services, Legal Services +1
$2,500 - 5,000
We help brands show up in the right place, at the right time, to the right people, with data driven campaigns. Our performance driven services include Search & Organic Growth, Paid Digital Media, Performance Creative, Media Strategy and more.
London, England, United Kingdom
Advertising, Native Advertising +46
Home Services, Insurance +28
Starting from $2,500
ROAST are a full-service media planning & buying agency, named after our obsession with achieving ROAS for our clients.
London, England, United Kingdom
Advertising, Programmatic Advertising +7
Insurance, Fintech +1
Starting from $5,000
GTech Digital delivers smart digital solutions since 2014, offering website development, mobile apps, online marketing, and graphic design. We focus on quality, innovation, and helping businesses grow successfully.
London, England, United Kingdom
Advertising, Display Ads +41
Ecommerce, Real Estate +3
$0 - $10,000
$24,000
2023
12 months
Challenge
Madison Brook International was facing high customer acquisition costs (CAC) and inconsistent lead generation through its PPC campaigns. Their goal was to increase visibility, generate quality leads, and reduce CAC.
Solution
We focused heavily on Quality Score, decreasing CPC and improving Ad Rank, which reduced lost impression share (more traffic, less cost). We refined keywords & bids, optimised ads, and adjusted audience targeting for better-quality conversions, with continuous A/B testing for ongoing improvements.
Result
Our strategy led to a +45% increase in click-through rates (CTR), a +35% reduction in cost per conversion, and a +40% increase in conversion rate. These changes significantly boosted their lead quality and reduced their overall marketing spend.
A full-service agency based in Melbourne, Smith Brothers Media® has extensive expertise within the key areas of Marketing, Creative and Tech with over 10 years in the industry.
London, England, United Kingdom
Advertising, Programmatic Advertising +34
Ecommerce, Legal Services +3
$2,500 - 5,000
Garreck is a full-service media consultancy providing solutions from traditional media through to digital (SEO, SEM, programmatic especially). Based in the UK, we have worked with some key clients in a variety of market sectors for over 20 years and
London, England, United Kingdom
Advertising, Native Advertising +31
Fintech, Healthcare & Hospital +3
Starting from $2,500
We’re one of UK’s leading specialist digital agencies, combining our expert knowledge with a commitment to data driven optimisation and the latest technology to help clients get amazing results on digital marketing initiatives. TMI is a Premier
London, England, United Kingdom
Advertising, Native Advertising +24
Ecommerce, Gambling +1
Starting from $2,500
TEAM LEWIS is a global marketing agency built to inspire growth. It provides a full spectrum of marketing, communications and digital services to deliver tangible business impact for clients and causes.
London, England, United Kingdom +1
Advertising, Native Advertising +41
Ecommerce, B2B Services +3
Starting from $2,500
These companies don’t have a physical office in the area but work and have clients there.
Authentic Marketers is a founder-led performance marketing agency helping ambitious brands grow through Meta Ads, creative strategy and paid acquisition. We combine fresh thinking, hands-on execution and a passion for growth.
Active in United Kingdom
Advertising, Video Marketing +6
Ecommerce, Real Estate +1
Starting from $2,500
Helping Growth-Focused Businesses Scale with High-Impact Digital Strategies At Tiga Digital, we help ambitious businesses grow faster by accelerating online sales and brand visibility through data-driven marketing.
Active in United Kingdom
Advertising, PPC +4
Fintech, IT +1
$0 - $2,500
$10,000
2017
12 months
Challenge
The competition for marketing graduate programs in Ohio has intensified significantly in recent years, primarily due to heightened rivalry and the proliferation of degree options, particularly online, offered by other universities.
Solution
We executed a personalized strategy designed for their target audience by enhancing visibility on search engines through adding targeted keywords relevant to the audience and fine-tuning content on their site.
Result
- Overall leads increase by 135% - Organic leads increase by 38% - Paid leads increase by 148%
Lein Digital is a full-service marketing agency based in Istanbul, delivering creative, data-driven, and AI-powered strategies that help brands grow locally and globally. First SEO&GEO Agency in Turkey
Active in United Kingdom
Advertising, Native Advertising +7
Healthcare & Hospital, Health & Wellness +1
$1,000 - $10,000
The Second Floor is a creative digital marketing studio for the culture economy: brand, web, and a measurable SEO + AEO growth engine that gets artists, startups, and creative businesses found in Google and in AI search.
Active in United Kingdom
Advertising, PPC +7
Ecommerce, B2B Services +1
Starting from $1,000
🏆 𝗧𝗢𝗣-𝗥𝗔𝗧𝗘𝗗 𝗚𝗢𝗢𝗚𝗟𝗘 𝗣𝗔𝗥𝗧𝗡𝗘𝗥 𝗔𝗚𝗘𝗡𝗖𝗬 - Google Ads & SEO is a battleground. Ready to dominate the competition? Unlock your digital potential today!
Active in United Kingdom
Advertising, Display Ads +13
Ecommerce, B2B Services +1
Any
Since 2020, Nodus Works has successfully implemented over 250 Shopify and Shopify Plus projects in Türkiye as a trusted Shopify Partner agency.
Active in United Kingdom
Advertising, Native Advertising +7
Ecommerce, B2B Services +1
$1,000 - $2,500
At Sixth City Marketing, we're focused on one thing: results. Our ROI-focused digital marketing agency can help your business increase qualified leads that turn into real sales through uniquely customized SEO, AI Search, PPC, and web design services.
Active in United Kingdom
Advertising, PPC +7
Home Services, Legal Services +1
Starting from $1,000
Shopify Plus Partner agency focused on scaling ecommerce brands through performance marketing, lifecycle systems, and conversion-focused UX. Byte Digital helps brands turn traffic into predictable, measurable revenue on Shopify.
Active in United Kingdom
Advertising, Retargeting and Remarketing +7
Ecommerce, B2B Services +1
$1,000 - 2,500
Cremicro is a digital marketing agency specializing in SEO, Google Ads, performance marketing, social media, and web design. With global offices, it delivers innovative, data-driven solutions backed by partnerships with Google, Meta, Yandex, Semrush.
Active in United Kingdom
Advertising, Programmatic Advertising +7
IT, Manufacturing +1
Any
Marketer Zilla partners with startups, SMEs, and enterprises to accelerate digital growth through data-driven SEO, paid advertising, web development, branding, and performance marketing that delivers measurable ROI.
Active in United Kingdom
Advertising, Retargeting and Remarketing +7
Ecommerce, Health & Wellness +1
Any
My work covers websites, search visibility and paid traffic. Most clients hire me for two of the three at once, because they feed each other.
Active in United Kingdom
Advertising, Retargeting and Remarketing +7
B2B Services, Construction +1
Starting from $1,000
MarkAge360 is a digital marketing agency that transforms bold ideas into measurable results across various platforms.
Active in United Kingdom
Advertising, Programmatic Advertising +7
Ecommerce, B2B Services +1
Starting from $2,500
