The 10 best SEO companies in London (with measurable results)

Finding the right SEO company can feel like navigating a maze of ever-changing algorithms and search trends. Every agency promises a path to the top, but how do you know they’re not wolves dressed in sherpas’ clothing?

Lucky for you, we’ve done the investigation necessary to find the most performant companies in this area. Let’s cut through the overgrowth of buzzwords and uncover the SEO companies with the best records: the ones that can surface you reliably in the search results. 

How much do SEO companies in London charge? The cost of hiring an SEO company in London is around £4,375 per month. However, it’s best to remember that this is just an average. The final cost will vary depending on the service you get and your needs and objectives.

How we chose

• Proven track record – We prioritised agencies with demonstrable results. Positive case studies, client testimonials, and industry awards were key indicators of success.

• Transparent practices – We looked for companies committed to ethical (white hat!) SEO tactics that align with search engine guidelines. 

• Adaptability – SEO is a constantly evolving field. Our selection favours companies that stay ahead of algorithm updates and demonstrate agility in their strategies.

• Client-focused approach – One should only work with agencies that understand client needs, tailor solutions, and communicate effectively throughout projects.

1. PN Digital SEO Agency London

Location: Kemp House, 152 – 160 City Rd, London EC1V 2NX, United Kingdom

Contact: +44 20 7846 0130

Opening hours: Monday to Friday – 8:30 AM to 5:30 PM

Website

The London SEO scene is crowded, but PN Digital  still manages to stand out with its winning combination of expertise and experience. 

First off, this agency offers a full suite of digital marketing services. Beyond SEO, it also offers Pay-Per-Click (PPC) Advertising, Web Design & Development, and even Mobile Application Development. 

That’s typical of most agencies now, so it’s not what got our attention. Rather, it’s that they have an excellent track record of getting results with just about all of those services.

For SEO in particular, the numbers are telling. In the past year alone, they’ve generated over £250 million in revenue for clients, secured over a million Page 1 Google results, and fostered a loyal clientele of over 500 satisfied businesses. 

Hard to argue with that. Then again… their pricing may give some reason to quibble.

Excellent agency with exceptional client management

“Fantastic agency. Jay has been brilliant right from onboarding to setting up and managing my campaigns. He’s a great listener and easily takes on board and openly discusses new ideas, making him an absolute pleasure to work with. Tons of leads coming through already. I’d recommend it.”

Benjamin | Collect, Google Review

Collaborative and easy to work with

“We have been working with Tom at PNDigital for over a year now and he has helped us build our organic presence as an online business. Tom is easy to work with, enthusiastic and extremely hard-working. He has helped us gain a better understanding of SEO and this has enabled us to develop an effective organic growth strategy for our business. I look forward to continuing our strong working relationship.”

Prab Saundh, Google Review

2. Rapid SEO London

Location: 71-75 Shelton St, London WC2H 9JQ, United Kingdom

Contact: +44 20 8123 1581

Opening hours: Monday to Sunday – 8:00 AM to 7:00 PM

Website

Founded in 2010, Rapid SEO London is one of the better options if you hate companies that make their area of specialisation sound like smoke and mirrors.  

Let’s start with the fact that they deliver SEO and PPC plans that ROI and budget management. Clients we talked to reported their dependability in cost-efficiency, actually.

Next, they don’t overwhelm you with jargon in reports, which is great if you’re a complete newbie to this stuff. If you don’t know what keyword analysis is but want to know, for instance, they’re apparently always game to explain.

Their services also cover all you might need for solid fundamentals. And if you need more, you just have to tell them what you’d like to achieve. Need an extra push, for example? They’ll offer different solutions, like Google Adwords management to get you seen even faster.

Has an Honest and reliable approach

“The level of service is impeccable. Adam and Lisa have gained month-on-month and held good rankings for my website resulting in more enquiries and bookings. They are honest and reliable in their approach and never try to sell additional services which I experienced with other companies that I’d worked with in the past. I would recommend Rapid SEO if you are looking to gain more business through website traffic. It is always a pleasure to receive a monthly report with positive results. Work promised is delivered on time and both Adam and Lisa go the extra mile to get results. Glad I found them.”

AT Beauford, Google Review

Has a deep understanding of the client’s brand and goals

“Working with Rapid SEO for the past year has been wonderful. From the very beginning, Adam understood the brand, and our aims and values and his efficient and analytical approach to tackling our SEO needs was invaluable. From keywords and visibility to site optimisation and the incredibly informative monthly reports – I would highly recommend Adam and his team.”

Barbara McMillan, Google Review

3. ClickSlice

Location: Studio 10, Shoreditch Stables, 138 Kingsland Rd, London E2 8DY, United Kingdom

Contact: +44 20 3287 3638

Opening hours: Monday to Friday – 9:00 AM to 5:30 PM

Website

ClickSlice is all about measurable outcomes, not long-term contracts. This “no strings attached” approach sets them apart at a time when agencies will push for long-term relationships. And before you ask, no, they don’t just focus on paid marketing alone (or they wouldn’t be in this list!).

So, what do you get with them? Expect campaign audits, expertly crafted ads, thorough keyword research, and daily optimisation – all designed for those coveted results.

One thing that stands out is their “never too busy” attitude. ClickSlice goes old-school with in-person quarterly reviews, which is a refreshing change from the endless Zoom meetings of the modern business world. 

But ClickSlice is about teaching too. With over 100,000 students taking their online courses, they’re thought leaders in the field. This also gives them an edge when it comes to staying ahead in the world of Google algorithms – after all, they can’t teach if they’re not up-to-date!

Has a strong attention to detail in keyword strategy

“ClickSlice has proven to be a valuable and capable SEO partner. For me, it was their attention to detail. They discovered amazing keywords for us to target on our commercial pages and our blog. From the first month of the campaign, we’ve seen a steady increase in organic traffic. Our main target page is up 37% compared to last year and it’s only been 16 weeks. Josh has stated that this is only going to compound in the coming weeks too which is exciting to hear! If you’re looking for an SEO agency, give them a shot!”

Bill Cheema, Google Review

Gives data-driven SEO results

“Highly recommend! I hired ClickSlice SEO services back in April to increase the footfall in my dance school, and it has done exactly that. I had so many new dancers through my door that I have now opened an extra night a week. I am so pleased with the results, and if you are considering hiring their SEO services I wouldn’t sit on it, it has completely transformed my business. Thank you again ClickSlice.”

Kendell Olley, Google Review

4. Fat Cow Media

Location: 27 Old Gloucester St, Holborn, London, WC1N 3AX

Contact: 020 3463 1122 

Opening hours: Monday to Friday: 9AM to 6PM

Website

Fat Cow Media, an award-winning web design agency based in London, extends its expertise to provide exceptional SEO services.

With a focus on helping businesses, particularly startups, enhance their online presence, Fat Cow Media offers strategic SEO solutions designed to drive organic traffic and improve search engine rankings.

Fat Cow Media’s status as an award-winning agency reflects their proficiency and innovation in the digital space.

We think their reputation assures clients of high-quality SEO services backed by proven success.

The agency boasts a team of SEO experts with a deep understanding of search algorithms and current best practices.

We find that their experience is particularly valuable for navigating the complex and ever-changing landscape of SEO.

We like that Fat Cow Media recognizes the unique challenges faced by startups, such as building online authority and competing with established brands.

They formulate strategic on-page and off-page SEO plans to address these issues, helping startups gain visibility and attract organic traffic.

We like that their SEO services include everything from site optimization and content creation to link building and performance tracking.

This holistic approach ensures that all aspects of a website’s SEO are covered, leading to sustained improvements in search rankings.

“I have been working with Fat Cow Media for more than a decade. They have always delivered an incredible service. From building my first website to helping me maintain various websites over the years. They are always prompt to reply to queries and requests. They are always willing to help and offer advice, often going the extra mile. Their knowledge and expertise have been an integral part of me growing my photography business. Thank you for all your support.“

5. UWP Group

Location: 3rd floor, 56 Leman St, London E1 8EU, United Kingdom

Contact: +44 20 7100 4562

Opening hours: Monday to Friday – 9:00 AM to 6:00 PM

Website

UWP Group is one of the top SEO agencies in London but does a lot of paid marketing too. They’re a Google Partner Agency – a nice sign of legitimacy, although it’s worth noting that it’s relatively easy to become one – and have a record of effective PPC campaigns.

Like most others on this list, UWP Group offers the whole digital marketing package: PPC, social media, content, design, and even PR. Where they probably excel more than most is their ability to leverage all of those for a cohesive (and effective!) strategy.

These guys aren’t shy about their results either. They’ve driven over 3 million Google visits for clients, as per their claims. This focus on tangible, measurable outcomes is always a good sign in the sometimes-nebulous world of SEO, as it tells you that you’ll get actual metrics with them.

Exceeds client expectations

“I have been blown away by the work the UWP Group has done so far for Edwards Home Fitted Furniture.  Such a great team of skilled marketing professionals who actively listened to our company’s needs and ideas, and also provided clear, timely, and transparent communication on project progress, goals, and results. I have been updated on every step/ creative idea, our website has now been transformed and a new Google ads campaign has been launched – I cannot wait to see what results we can achieve by working together!”

Jordan and Irina Edwards, Google Review

Rapidly improves website traction and visibility

“UWP Group has helped our new website gain traction and visibility in such a small space of time. They bought into our vision from the beginning and have consistently delivered on what we have asked of them. Their blog articles have been both informative and engaging and we could not be happier. I highly recommend it.”

Joe Seaman, Google Review

6. DubSEO

Location: Suite 248, Linen Hall, 162-168 Regent St., London W1B 5TB, United Kingdom

Contact: +44 20 7183 2266

Opening hours: Monday to Friday – 9:00 AM to 5:00 PM

Website

DubSEO stands out with its focus on personalisation, results-driven SEO strategies, and a 50+ strong team. They eschew generic approaches, tailoring solutions to drive visibility and tangible business growth with specific audiences.

They also offer tiered SEO packages to match different needs. We think their Bronze Package is ideal for local businesses, while the Silver and Gold packages offer expanded keyword targeting, account management, and in-depth consultation for larger or nationally focused websites.

Beyond core SEO, DubSEO’s expertise extends to all the usual suspects again. We like them best for their highly individualised strategies for clients, though. 

Improves Google page ranking

“I was shocked when I got more business calls in recent days.” The total credit goes to DubSEO Agency and its excellent SEO team. They increase my page ranking in Google page ranking within 10 days and also they maintain an effective B2B listing for my business. I have been running this business for the last 7 years but people from Yorkshire never respond to me like the days before. They really did this and I am satisfied with the services they applied for and I am still taking their service for a year.”

Barry Male, Google Review

Gives extremely high return on investment (ROI)

“We receive over 90% of our current business through the Search Engine. We owe it to DubSEO for incredible search engine skills. Happily, we are now on page 1 of Google, Yahoo and Ask Jeeves using our chosen keywords. Every day we sign up new clients to our Services through our excellent designed new website. We have made a wonderful return on our investment hundreds, if not thousands of times over since you launched our new and responsive website. We are extremely pleased!”

James Kilburn, Google Review

7. Agile Digital Agency

Location: 10-11 Heathfield Terrace
London, W4 4JE, United Kingdom

Contact: Tel: +44 20 8123 3376

Opening hours: Contact for more information

Website

Agile Digital Agency, founded in 2018 in London, is a premier digital marketing firm specializing in web design, SEO, and digital advertising.

The agency has grown into a globally distributed firm providing strategic digital marketing solutions to clients across the UK, Europe, and North America.

What we like the most is how Agile Digital Agency offers a robust suite of SEO services designed to improve search engine rankings, increase organic traffic, and drive business growth.

Their expertise covers on-page, off-page, and technical SEO.

The founders and team bring over two decades of experience in digital marketing, providing clients with a wealth of knowledge and proven strategies.

Agile Digital Agency serves clients across the UK, Europe, and North America, demonstrating their ability to operate effectively in diverse markets and cater to a wide range of business needs.

Agile has established itself as a trusted partner for leading companies in various industries, showcasing their ability to deliver high-quality digital marketing solutions.

We find that the agency’s commitment to excellence has solidified its position as a top digital agency, known for delivering results that drive business growth.

“They have become an invaluable partner to us! Great communication, prompt responsiveness, and dedication to understanding our needs. They manage our digital campaigns and helped us boost our online visibility, engagement, and conversions. We wholeheartedly recommend their services to anyone seeking top-notch digital marketing and website development expertise.“

8. Cash Cow Marketing Ltd

Location: 5 Merchant Sq, London W2 1AY, United Kingdom

Contact: +44 20 3823 8984

Opening hours: Monday to Friday – 8:30 AM to 6:00 PM

Website

Cash Cow Marketing Ltd is a comprehensive digital marketing agency based in London, specializing in SEO, PPC, web design, and social media marketing. With over 15 years of experience, the company focuses on enhancing digital visibility and driving tangible results for businesses of all sizes. Their services are tailored to boost website visibility, drive organic traffic, and achieve higher search engine rankings.

With over 15 years of experience, Cash Cow Marketing Ltd has a knowledgeable team capable of delivering a wide range of marketing services. Their expertise ensures that clients receive well-informed and effective strategies tailored to their specific needs, helping businesses navigate the complexities of digital marketing.

Furthermore, the company promises noticeable results within three months and offers to work for free if these are not achieved. This risk-free proposition provides significant assurance to clients, demonstrating the company’s confidence in their ability to deliver on their promises and their commitment to client success.

Note though that the thorough website audit and setup process, while beneficial in the long run, can be time-consuming. This initial phase may delay the immediate impact of their services, requiring patience from clients before they start seeing significant improvements in their online visibility and traffic.

Overall, Cash Cow Marketing Ltd is a reliable and experienced digital marketing agency offering a comprehensive suite of services to enhance online visibility and drive business growth. Their customized, transparent, and results-driven approach makes them a strong contender for businesses seeking to improve their digital presence.

Here are some reviews from their clients:

“Cash Cow Marketing is always a pleasure to work with. Prompt and meaningful communication from Clive and always happy to help to get the outcomes we need. Would happily recommend.”

“My company (A1 Drain Clean) have been using Cash Cow Marketing for the last three years have seen a marked increase in enquiries and sales, through sustained online work. I’ve experienced faceless, unobtainable journeymen and tricksters, over several years of online campaigns and Clive and Enrico are a refreshing change from those bad old days.”

9. Nautilus Marketing

Location: 85 Great Portland Street St, Marylebone, London,W1W 7LT

Contact:

• [email protected]
• 020 4513 9344

Opening hours: Weekdays: 9:00AM to 5:00PM

Website

Nautilus Marketing is an award-winning, full-service digital marketing agency based in London, renowned for its innovative and client-centric approach. With over a decade of experience, the agency offers a wide range of digital marketing solutions, including SEO, PPC, social media management, web design, and more.

Nautilus Marketing boasts over ten years of experience in the digital marketing industry, which translates to a deep understanding of SEO strategies and trends. The agency has worked with clients across various industries, including hospitality, eCommerce, fashion, and technology, providing a broad perspective and specialized knowledge.

Nautilus Marketing offers a variety of SEO services such as organic search, local SEO, eCommerce SEO, international SEO, multilingual SEO, and more. This ensures that businesses of all sizes and types can find the SEO solutions they need.

Their effective link-building strategies will help improve you domain authority and search engine rankings, which is crucial for long-term SEO success.

Nautilus Marketing is known for delivering results, as evidenced by their extensive portfolio and client testimonials. Their results-driven approach ensures that SEO strategies are aligned with business objectives. Regular performance monitoring and reporting help clients track progress and measure the effectiveness of their SEO campaigns.

Given their extensive experience and range of services, Nautilus Marketing’s pricing might be on the higher end compared to smaller or less established agencies. This could be a consideration for startups or small businesses with limited budgets.

Here are some reviews from their clients:

“I’ve been using Nautilus for 3 years for our event photography now – and wouldn’t consider going to anyone else. They’re professional, flexible, lovely to work with – and deliver fantastic results.”

“The Nautilus team delivered an excellent quality website that we can be proud of! I would recommend their team to anyone looking for a custom website build and/or brand development.”

“We used Nautilus for our SEO, and started with the Setup Package. They were really easy to work with, professional and everything was done to a timely manner. It was all explained and easy to understand, so I highly recommend the Nerds at Nautilus! Looking forward to using them again in the future. 🙌🏼 – Taking The Pixels”

10. SEO Expert UK Paul Hoda

Location: Kemp House, 152 – 160 City Road, London EC1V 2NX,

Contact:

• 02034882924
• [email protected]

Opening hours: Contact for more information

Website

Paul Hoda is a prominent SEO expert based in London, UK, who has earned a reputation as one of the leading figures in the field of search engine optimization (SEO) and digital marketing.

Specializing in increasing online visibility and driving organic traffic, Paul has helped numerous businesses across the UK and Europe achieve first-page rankings on search engines like Google.

We think that Paul Hoda’s extensive knowledge and years of experience in SEO make him a highly skilled professional in the digital marketing industry.

His deep understanding of search engine algorithms, particularly Google’s, enables him to create effective strategies that consistently deliver results.

One of Paul Hoda’s key strengths is his ability to customize SEO strategies to meet the specific needs of each client.

We like that rather than applying a one-size-fits-all approach, Paul carefully analyzes each website’s unique characteristics and crafts a bespoke optimization plan.

We’re impressed that Paul has a proven track record of achieving tangible results for his clients, including higher search engine rankings and increased organic traffic.

The reviews and testimonials from satisfied clients attest to his ability to significantly improve SEO performance, which in turn leads to enhanced online visibility and revenue growth.

Paul Hoda offers his SEO services at competitive prices, making high-quality SEO accessible to a wide range of businesses. We highly recommend!

Here are some reviews from their clients:

“Paul Hoda demonstrates exceptional professionalism and extensive expertise in the field of SEO. I am immensely grateful for his outstanding service.”

“After receiving an email from Google telling me our website had some CLS issues (and me not knowing what on earth that meant) I contacted Paul (after reading his reviews and looking at his website) in a slight panic. He assured me he could help and he sorted everything out early the following morning for a great price. Would highly recommend.”