The 5 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

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


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.


  • Comprehensive services
  • Expertise and experience
  • Partnerships and certifications


  • Pricing

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

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


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.


  • Affordability
  • Transparency
  • Focus on results


  • Small team

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


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!


  • Proven results
  • Flexible contracts


  • Pricing

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. UWP Group

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


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.


  • PPC Expertise
  • Data-driven strategies
  • Experienced team


  • Poor communication

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

5. 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


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. 


  • Comprehensive services
  • Focus on organic SEO
  • Versatile SEO services


  • Occasional poor communication

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

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