⭐ 9 SEO Agencies in London, UK (2025)

Tenet is a London-based SEO agency helping B2B and B2C brands achieve measurable growth through tailored, ROI-focused strategies. We have delivered 450+ digital solutions, impacted 20M+ people, served clients in 15+ countries, and maintained a 98% client satisfaction rate. Our product-led approach combines technical SEO, content strategy, and AI optimisation to improve rankings, increase organic traffic, and drive conversions (primarily).

Our SEO Approach at Tenet:

We focus on revenue, not vanity metrics. Our SEO targets high-intent keywords, fixes technical issues, and creates content that converts. You get sustainable visibility, quality leads, and protection against algorithm changes such as driving more conversions, sustainable growth, an qualified traffic.

• Address: Floor 24, The Shard, 32 London Bridge St, London SE1 9SG, United Kingdom
• Phone number: +44 7418 379209
• Email: hello@wearetenet.com 

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Pearl Lemon helps businesses get found online and turn visibility into measurable growth. The London team works across local, technical, e-commerce, and international SEO, creating strategies that match each client’s goals. Led by Deepak Shukla, they have built a reputation for clear communication, fast delivery, and going the extra mile. Hundreds of reviews on Google, Trustpilot, and other platforms reflect the results they deliver in competitive markets.

• Address: Pearl Lemon Ltd., Kemp House, 152 – 160 City Road, London, EC1V 2NX, United Kingdom
• Phone number: +44 207 183 3436 / +44 7454 539583
• Email: info@pearllemongroup.com

Ignite SEO is a London-based agency that provides outcome-focused search engine optimisation services. Established in 2020 by Adam Collins, the company uses a five-step SEO Success Framework to deliver consistent, measurable improvements in visibility and lead generation. Its services include local SEO, e-commerce SEO, technical SEO, and link building, supported by regular reporting and clear communication. In 2024, Ignite SEO was ranked the #1 SEO agency in London by DesignRush.

• Address: 49 Stewart’s Grove, London, SW3 6PH, United Kingdom
• Phone number: 020 3150 0995

The SEO Works is a UK-based digital marketing agency with offices in London, Sheffield, and Leeds. Founded in 2009, the company provides SEO, PPC, digital PR, and web design services to clients across sectors including healthcare, education, e-commerce, and professional services. 

The agency has earned multiple industry awards and holds Google Premier Partner status. Its campaigns focus on improving search visibility, increasing leads, and delivering measurable returns, supported by detailed reporting and long-term strategy.

• Address: Bellerive House, 3 Muirfield Cres, Isle of Dogs, London, E14 9SZ
• Phone number: 0800 292 2410
• Email: info@seoworks.co.uk

Logicsofts works with businesses to improve their online presence and turn search visibility into real sales opportunities. The agency provides services such as SEO, link-building, and content marketing, each tailored to the client’s industry and goals. 

Their team focuses on building strategies that combine technical expertise with market insights, helping brands improve rankings, attract qualified traffic, and increase conversions. Past projects include boosting ecommerce sales through organic growth, helping companies recover from SEO penalties, and supporting startups with competitive keyword targeting.

• Address: Logicsofts solutions ltd., 211 Basingstoke Road, Reading RG2 0HX, UK
• Phone number: 0208 629 1504
• Email: info@logicsofts.co.uk

Genie Crawl is a UK-based boutique digital marketing agency that focuses on delivering measurable results through SEO, PPC, and other online growth strategies. The agency works on a month-to-month basis, giving clients flexibility without long-term contracts. Its team combines industry knowledge with a personalised approach, ensuring every project receives close attention and tailored solutions. 

Services include keyword research, on-site and off-site optimisation, link building, content creation, social media marketing, and website development. Genie Crawl serves clients in the UK, US, and beyond, helping businesses increase visibility, attract high-quality traffic, and achieve sustainable growth.

• Address: 120-122 High Street, Whitton, Twickenham, TW2 7LL
• Phone number: 020 8099 7559
• Email: contact@GenieCrawl.com

Breakline is a specialist SEO agency that focuses exclusively on search engine optimisation. With more than a decade of experience, the team has developed proven, data-driven strategies that help businesses improve visibility, attract qualified traffic, and convert visitors into customers. 

Their services cover technical SEO, local SEO, eCommerce SEO, B2B SEO, content marketing, and digital PR. Breakline works with clients across sectors, delivering transparent reporting, measurable growth, and long-term search performance without locking businesses into restrictive contracts.

• Address: 20 Old Bailey, London, EC4M 7EN
• Phone number: 020 3886 0038
• Email: hello@breaklineagency.com

Odyssey New Media is a full-service digital marketing agency that helps businesses improve visibility, increase traffic, and drive sales through tailored online strategies. Established in 2010, the agency brings over 20 years of combined experience in SEO, PPC, social media management, and website development. 

Its SEO services cover everything from keyword research and technical auditing to link building, content creation, and analytics tracking. 

The team works with clients across industries, providing transparent reporting and adjusting campaigns to match evolving search engine algorithms. By combining technical expertise with creative marketing, Odyssey New Media delivers measurable results and long-term growth for its clients.

• Address: Office No. 0009, The Old Bus Garage, Harborne Lane, Selly Oak, Birmingham, West Midlands, B29 6SN
• Phone number: 0121 439 5450
• Email: info@odysseynewmedia.com

Blue Array is a specialist organic search agency known for its unique “consulgency®” model, combining the personal attention of a consultant with the scalability of an agency. Since its launch in 2015, the company has focused exclusively on SEO, Generative Engine Optimisation (GEO), and Digital PR, helping brands, from ambitious start-ups to leading enterprises, achieve measurable, long-term growth. 

Blue Array’s services include technical SEO, content strategy, international SEO, and app store optimisation, all delivered with a results-driven approach backed by transparency and collaboration. The agency is a certified B Corporation and a multi-award winner, recognised for both its client success stories and its workplace culture.

• Address: 86-90 Paul Street, 3rd Floor, London, EC2A 4NE, UK
• Phone number:  0800 0119 123
• Email: hi@bluearray.co.uk

👉 Further resources

• SEO vs Google Ads: Which One to Choose For Your Business?
• Why and How You Should Combine SEO and PPC? 
• LLM SEO: How to Rank Your Website in AI Search Engines 

Choosing an SEO agency in London is about more than just rankings; it’s about finding a partner who understands your business goals and can deliver sustainable growth. The agencies featured here stand out for their transparent processes, data-driven strategies, and consistent results. 

By aligning their expertise with your objectives, they help you attract qualified leads, strengthen your online presence, and stay ahead of competitors. 

The right partner will not only optimise your website today but also position your brand for long-term success in an ever-changing search landscape.

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