Disclosure: MagnifyLab is one of the ten Google Ads agencies on this page, and we wrote the page. It is based in St Albans, Hertfordshire, with a registered office in Harrow, London. That is a reason to check our work harder, not to read it less carefully.
Other Google Ads companies here beat us on specific points. Brainlabs and Croud are bigger and run global campaigns we are not built for. Passion Digital, Found, Eskimoz and Loud Mouth Media hold Premier Partner status. We are a Google Partner.
Several “best Google Ads agencies in London” lists that rank for this search put the publisher first and state no method. We state our method below, label self reported results and say so when an Google Ads agency publishes nothing.
The short answer. The best Google Ads agency in London is the one that fits your budget and your sector. Enterprise brands need scale and platform access. SMEs need lead quality and clear reporting. Match yourself to an agency here:
- Enterprise budgets across several countries: Brainlabs or Croud
- Lead generation for B2B or B2C SMEs: MagnifyLab or Loud Mouth Media
- Small ad spends and very tight budgets: Rapid SEO London
- Multilingual campaigns across European markets: Eskimoz
- B2B and professional services on a time based fee: Passion Digital
- Hospitality, travel and ecommerce: Found
- SaaS, fintech and property: Semetrical
- Ecommerce and consumer brands backed by a larger group: s360 UK
How we vetted this list
Every agency here manages Google Ads for paying clients. Each one either has its main office in London or runs a London office that serves London clients. We checked each against its own website, award and partner announcements, and independent review or directory profiles where they exist. Facts were last checked on 22 October 2026.
We looked for named clients, verifiable results, a clear service scope and credentials such as Google Partner or Premier Partner status. Self reported results are labelled as self reported.
We held MagnifyLab to the same checks as every other Google Ads company on the list and state its location, pricing and results in the same way.
This is a curated shortlist, not a league table. Each profile says what type of business the Google Ads agency suits best, because the right choice depends on your budget and goals.
Quick comparison table
| Agency | Best for | Location | Starting budget |
| 1. MagnifyLab | SMEs and lead generation | Hertfordshire, with a registered office in Harrow, London | Retainers from £750/mo plus ad spend |
| 2. Brainlabs | Enterprise paid media | London | Quote based |
| 3. Croud | Global, multi market campaigns | London | Quote based |
| 4. Passion Digital | B2B and professional services | London (Holborn) | Quote based |
| 5. Found | Ecommerce, hospitality and travel | London (Hatton Garden) | Quote based |
| 6. Eskimoz | Multilingual, multi market campaigns | London (UK division) | Quote based |
| 7. Semetrical | SaaS, finance and property | London | Quote based |
| 8. Rapid SEO London | Small ad spends and tight budgets | London (Covent Garden) | Retainers from £200/mo plus ad spend |
| 9. s360 UK | Ecommerce and omnichannel brands | London | Quote based |
| 10. Loud Mouth Media | Smaller budgets, UK and Ireland | Belfast HQ, London office | Estimated from £1,000/mo |
The 10 best Google Ads agencies in London: A deeper dive
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MagnifyLab
About: MagnifyLab is a PPC agency based in Hertfordshire, with a registered office in Harrow, London. It specialises in serving SMEs, including London firms. It builds and runs Google Ads with a senior strategist on every account and a live lead tracking platform that ties media spend to pipeline and revenue. Campaigns run across Google Search, Performance Max and Display. Results include a 76% reduction in cost per lead for Sydney Mitchell Solicitors, 64% more new clients for City Legal and a 126% rise in monthly enquiries for Steelo.
Key Services: Google Ads and PPC management, landing page design, Bing Ads, SEO, AI SEO (GEO and AEO), web design and development, content marketing
Sectors Served: B2B and B2C brands in legal, professional services, property and home services
Notable Clients: Summit Law, Sydney Mitchell, Steelo, Adventures in Furniture, GTE Settlement Agreements, D2M Product Design, National Private Investigators
Accreditations: Google Partner Agency, Microsoft Advertising (Bing) accredited, Semrush Certified Agency Partner, Digital Agency Network Top Rated Agency
Reviews: 5 star rating across 29+ Google reviews
Locations: St Albans, Hertfordshire, with a registered office in Harrow, London. Serving SMEs in London and the Home Counties, with national reach
Pricing: Retainers start from £750 per month plus ad spend. Media budgets start from £2,000 per month. A free digital audit comes before any engagement begins.
Great For: SMEs that judge Google Ads on leads and revenue, including law firms, professional services, property and home services brands that want a senior strategist running the account.
Website: MagnifyLab
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Brainlabs
About: Brainlabs is a global performance media agency headquartered in London and founded in 2012. It describes its method as testing, technology and talent, and runs paid search, programmatic, paid social and retail media alongside data science and SEO. It won the 2023 Google Premier Partner Award for Brand Awareness in EMEA, for work with Simply Business, and reports a 13% lift in return on ad spend for easyJet holidays through value based bidding.
Key Services: Paid search, programmatic, paid social, influencer, retail media, SEO, CRO, creative, data strategy and data science, Google Marketing Platform
Sectors Served: Retail and consumer brands, travel and hospitality, entertainment, financial services, media and telecoms
Notable Clients: easyJet holidays, Deliveroo, Icelandair, Simply Business, Mars, LEGO
Accreditations: Google Premier Partner, Google Marketing Platform Authorised Sales Partner
Locations: London headquarters, with offices in other regions
Pricing: Not published. Built for brands with large media budgets.
Great For: Large brands that want technology led testing and a deep bench of specialists, and have the budget to match. Smaller advertisers will usually find better value elsewhere on this list.
Website: Brainlabs
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Croud
About: Croud is a global digital agency headquartered in London and founded in 2011. It pairs 500+ in house digital experts with a worldwide on demand network of marketing specialists known as Croudies, which lets it run paid media across many markets and languages. Google named it its fastest growing search agency in the UK in 2013. Croud is part of the Croud Group, alongside luxury specialist VERB Brands and social first agency Born Social.
Key Services: Paid media strategy, paid search, paid social, programmatic, creative, UX design and development, CRM and email, data and analytics, SEO, content
Sectors Served: Global consumer, financial services and technology brands
Notable Clients: Audible, Vans, IWG, AllSaints
Accreditations: Google Premier Partner, Google Marketing Platform Sales Partner
Locations: London headquarters, with offices in the US and Dubai
Pricing: Not published. Built for enterprise budgets.
Great For: Enterprise brands that need paid media run across several countries and languages, with a flexible mix of in house and on demand talent.
Website: Croud
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Passion Digital
About: Passion Digital is a London digital marketing agency based in Holborn. It is a Google Premier Partner, which it says places it in the top 3% of UK agencies, and says it has more than ten years of experience managing campaigns. Its PPC team bills on time spent managing your channels, not a percentage of your media spend. It does not publish named clients or case study figures on its PPC page.
Key Services: PPC management, PPC audits, paid search management, Google Shopping, programmatic advertising
Sectors Served: B2B, professional services, travel, charities and ecommerce
Notable Clients: Octopus Investments, Cloud Gateway, Knight Frank, Downey
Accreditations: Google Premier Partner
Locations: London (Holborn)
Pricing: Not published. Fees are based on time spent, not a percentage of ad spend.
Great For: B2B and professional services firms that want a Premier Partner team and a fee that does not rise as your ad budget grows.
Website: Passion Digital
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Found
About: Found is a London agency with its headquarters in Hatton Garden and an office in New York. It is a Google Premier Partner and part of Tomorrow Group, which also includes data and AI consultancy Braidr. It runs PPC and paid social alongside SEO, with a specialist hospitality PPC offer. It was a finalist in two categories at the 2026 UK Search Awards. It does not name clients or publish case study figures on its Premier Partner page.
Key Services: PPC, paid social, programmatic, Meta advertising, PPC consultancy, hospitality PPC, SEO, content marketing, conversion optimisation, AI consulting
Sectors Served: Ecommerce, hospitality, travel, B2B, financial and professional services, SaaS and fintech
Notable Clients: Not named on its website
Accreditations: Google Premier Partner, Microsoft Partner, Meta Partner, ISO 27001 certified
Locations: London (Hatton Garden), with an office in New York
Pricing: Not published. Its Clutch profile lists a minimum project size of $1,000 and an hourly rate of $100 to $149.
Great For: Ecommerce, hospitality and travel brands that want a Premier Partner agency with paid and organic search under one roof.
Website: Found
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Eskimoz
About: Eskimoz is a European search marketing agency. Its UK division markets itself as an SEM agency in London and came from the acquisition of Digital Uncut. It is a Google Premier Partner, shows a Google Partner Premier 2026 badge, and says it has 200 consultants across Europe and 850+ clients. Its Google Ads work covers keyword targeting, campaign management, Quality Score optimisation, tracking and A/B testing, plus a service that prepares ads for AI generated answers. It won European Search Awards in 2024, 2025 and 2026. Its published case study figures are for SEO, not Google Ads.
Key Services: Google Ads management, keyword targeting, ad copywriting, A/B testing, tracking and data, Quality Score optimisation, SEO, paid social, Amazon Ads
Sectors Served: Tourism, healthcare, luxury, SaaS, ecommerce, banking and insurance, automotive, energy and fashion
Notable Clients: Beaufort & Blake, Mitratech, Coast & Country, Hiyacar, TRG Datacenters, GuestReady, Just Boilers
Accreditations: Google Premier Partner, Meta Business Partner, TikTok Marketing Partner, Amazon Ads Advanced Partner
Locations: London (UK division), with agencies in France, Germany, Italy and Spain
Pricing: Not published.
Great For: Brands that run Google Ads across several European markets and languages and want a Premier Partner team with a London base.
Website: Eskimoz
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Semetrical
About: Semetrical is a London paid search and SEO agency with a technology led approach. It builds custom tools for campaign management and automated reporting, and sets bespoke KPIs for each client. It describes itself as a Google Search Advertising Partner, not a Premier Partner, and won Best Small Biddable Agency in 2020. Its PPC page names well known clients but publishes no case study figures.
Key Services: Paid search management, PPC consulting, campaign audits, keyword research, bespoke strategy and KPI setting, automated reporting, custom campaign technology
Sectors Served: SaaS, ecommerce, finance, travel and property, across B2B and B2C
Notable Clients: Ticketmaster, Stripe, OnTheMarket, LexisNexis
Accreditations: Google Search Advertising Partner. Premier Partner status is not stated on its PPC page.
Locations: London
Pricing: Not published.
Great For: SaaS, fintech and property brands that want a technology led paid search team with SEO roots.
Website: Semetrical
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Rapid SEO London
About: Rapid SEO London is a Covent Garden agency run by two named people, Adam and Lisa, who say they manage every campaign personally. It says it has 15+ years of PPC experience, no long term contracts and no minimum ad spend, and it shows a 4.9 rating from 61 Google reviews. Its meta description advertises Google Ads management from £200 a month plus VAT. Its service list covers account setup or audit, conversion tracking, ad testing, bid management, remarketing and landing page optimisation, with monthly or weekly reporting. It claims 30% average cost savings but gives no baseline.
Key Services: Google Ads setup and audits, campaign build, conversion tracking, keyword research, ad testing, bid management, remarketing, call tracking, landing page optimisation, monthly or weekly reporting
Sectors Served: Businesses of all sizes in London and across the UK. No sectors are named.
Notable Clients: Not named. Three Google reviewers are quoted on its page: FighterFit, Hospitality Line and Artemis Clinic.
Accreditations: TechBehemoths 2025 Winner badge. No Google Partner status is stated on its page.
Reviews: 4.9 from 61 Google reviews, per the Google Maps listing it cites
Locations: London (Covent Garden)
Pricing: Management from £200 a month plus VAT, per its meta description. The page itself says fees depend on scope and gives no figure, so confirm what the £200 covers. It says there is no minimum ad spend and no long term contract.
Great For: Small businesses on very tight budgets, and small ad spends that larger agencies will not take on. The trade-off is evidence: no stated Partner status, no named clients and no published case study figures.
Website: Rapid SEO London
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s360 UK
About: s360 UK is the UK arm of performance marketing group s360. It was formed when s360 acquired London agency Reload Digital in December 2023. Reload says it has worked with international brands since 2010, and the combined business has more than 300 digital professionals. It offers media strategy, digital consultancy, data, analytics and creative, with a focus on ecommerce and omnichannel. We could not confirm its Google Premier Partner status from public pages.
Key Services: Media strategy, digital consultancy, data and analytics, creative, ecommerce and omnichannel marketing
Sectors Served: Ecommerce, retail and consumer brands
Notable Clients: Wrangler, Lee, New Era, Emma Bridgewater
Accreditations: Not stated in its acquisition announcement
Locations: London
Pricing: Not published.
Great For: Ecommerce and consumer brands that want paid media backed by a larger international group.
Website: s360 UK
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Loud Mouth Media
About: Loud Mouth Media is a multi award winning performance marketing agency based in Belfast, with offices in Dublin, London and Glasgow. It is a Google Premier Partner, a Google International Growth Agency, a Microsoft Advertising Partner and a Meta Business Partner, and runs PPC, paid social, SEO and email for ecommerce and SME brands. A Clutch reviewer reports a 500% return on ad spend and 20% more profit for an audio software client. Another says it is not the cheapest agency but delivers excellent return on investment. It won PPC Agency of the Year and Integrated Search Agency of the Year at the 2024 UK Agency Awards.
Key Services: PPC, paid social (Meta, TikTok, LinkedIn, Pinterest), SEO, email marketing, ecommerce marketing
Sectors Served: Ecommerce, hospitality, healthcare and software
Notable Clients: The Irish FA, which has named it Official Digital Partner. Clutch reviews also cover ecommerce, software and hospitality clients.
Accreditations: Google Premier Partner, Google International Growth Agency, Microsoft Advertising Partner, Meta Business Partner
Locations: Belfast headquarters, with offices in Dublin, London and Glasgow
Pricing: Not published. Third party estimates suggest from around £1,000 per month.
Great For: Ecommerce brands and SMEs that want Premier Partner expertise at accessible prices, especially those selling across the UK and Ireland.
Website: Loud Mouth Media
How to choose the right Google Ads agency in London
Choose on evidence of lead quality and profit, not on clicks or badges. Before you sign, ask each agency to:
- Show case studies from businesses in your sector with performance data.
- Explain how it measures qualified leads, sales and profit, and whether it can import offline conversions from your CRM.
- Confirm in writing that you own the Google Ads account, conversion data and landing pages.
- Set out its management fee, minimum term and cancellation terms.
- Name the person who will run your account and how many accounts they manage.
- Explain how it protects your cost per lead in London auctions, where competition for commercial terms is high.
- Provide a 90 day plan with measurable targets.
Then check the agency’s status in Google’s official Google Partners directory. Partner status is useful evidence of platform credentials. It does not guarantee results.
How much do Google Ads agencies cost in London?
Most Google Ads agencies in London charge a monthly management fee on top of your ad spend. Fees run from about £500 to £1,500 a month for small businesses and £5,000 or more at enterprise level. Only a few agencies publish prices. On this list, MagnifyLab publishes retainers from £750 a month plus ad spend, Rapid SEO London advertises management from £200 a month plus VAT, and Passion Digital says it bills on time spent, not a percentage of media spend.
Here are the common billing options:
| Fee model | Typical UK range | How it works |
| Percentage of ad spend | 10% to 30% for SME budgets, lower at enterprise scale | Your fee grows as your budget grows |
| Flat monthly retainer | £500 to £1,500 for small businesses, £1,500 to £5,000 for mid market, £5,000 to £10,000+ for enterprise | Fixed fee, whatever you spend |
| Time based | Charged on hours worked | Passion Digital bills this way |
| Hybrid | Base retainer plus a smaller percentage or performance bonus | Mixes cost certainty with incentives |
| Set up fee | £250 to £1,000, one off | Audit, campaign build and tracking |
These ranges are indicative and drawn from published UK agency pricing guides. Your media budget is paid to Google separately.
Google Premier Partner or Google Partner: does it matter?
Premier Partner status is useful evidence of skill and scale, but it does not guarantee results. Google awards it to roughly the top 3% of Google Partners in each country, based on variables including performance, spend management and certified staff.
Premier status partly reflects the volume of spend an agency manages. Smaller specialists can deliver excellent work without it, and a large agency with the badge may not be the right fit for you.
On this list, Brainlabs, Croud, Passion Digital, Found, Eskimoz and Loud Mouth Media state Premier Partner status. MagnifyLab is a Google Partner, and Semetrical describes itself as a Google Search Advertising Partner. Check any claim in Google’s Partners directory before you sign.
Red flags when hiring a Google Ads agency
Any one of these deserves a hard question. Two or more should end the conversation.
- Guaranteed results, rankings or returns before the agency understands your business.
- No access to your ad account, or an account created under the agency’s own credentials.
- Reports built on clicks and impressions instead of leads, cost per lead and revenue.
- The same strategy for every client, whatever the sector.
- A 12 month minimum term with heavy exit penalties.
- Senior people at the pitch and junior staff on your account.
- Vague answers when you ask about methodology or reporting.
- No named clients or checkable results anywhere on its own website.
Google Ads agency London FAQs
How much does a Google Ads agency cost in London?
Most London Google Ads agencies charge £500 to £1,500 a month for small businesses and £1,500 to £5,000 for mid market accounts, plus your ad spend. Some charge 10% to 30% of spend instead. Enterprise retainers usually start around £5,000. Ask for management fees and ad spend to be invoiced separately.
What is the best Google Ads agency in London for small businesses?
The best Google Ads agency for a small business is one that gives you senior attention and reports on leads and revenue. In this guide, MagnifyLab, Rapid SEO London and Loud Mouth Media all work with SMEs and small businesses. Check that the agency has results in your sector before you sign.
Do I need a Google Ads agency based in London?
No. Google Ads is managed online, so location matters less than sector experience and who runs your account. A London agency helps if you want in person workshops and local market knowledge. Ask any agency how often it will meet you and whether the people you meet will manage your account.
How long does Google Ads take to work?
Google Ads can send traffic within days of launch, but profitable results usually take about three months. The first month covers tracking, account structure and baseline data. Months two and three are for testing ads, adding negative keywords and adjusting bids. Gains build as conversion data accumulates.
Should I hire a Google Ads agency or manage campaigns in house?
An agency usually makes sense when you lack platform expertise, run several channels or cannot justify a full time hire. In house works best when Google Ads is your main channel and you can recruit and keep specialist talent. Many businesses start with an agency and bring work in house later.
Who should own my Google Ads account?
You should. The account should sit under your business name and billing, with the agency given access. That keeps your campaign history, conversion data and Quality Scores if you switch agencies. Avoid any agency that creates accounts under its own credentials.
Choosing the right Google Ads agency in London
The clearest divide in this list is fit, not quality. Enterprise agencies such as Brainlabs and Croud suit large, multi market budgets. Specialists suit specific needs, from multilingual, multi market campaigns at Eskimoz to hospitality and travel at Found. For SMEs focused on leads, look for senior led teams that work on your account and have proven expertise in your sector.
Shortlist two or three agencies, ask each for a 90 day plan and compare their offer. Ask how each one handles AI search visibility alongside Google Ads, because buyers now research on both. If you would like a second opinion on your current campaigns, MagnifyLab offers a free PPC audit.
This page is general information about published services and prices. Every google ads agency fact was read from that agency’s own website, a partner announcement or an independent profile on 22 October 2026, and each agency’s website is linked in its profile. Prices, partner status and client lists change; we re-check every figure on this page quarterly and the next check is due 22 January 2027.
