Cecilia De La Viesca SEO is no longer just about rankings. It’s about visibility, velocity, and vision—especially in a digital landscape where user journeys rarely follow a straight line. Choosing the right SEO agency means choosing a partner who understands your goals, adapts to how your audiences search, and delivers results grounded in insight and innovation.
This curated list highlights ten of the best SEO agencies in the UK. From technical excellence to creative brilliance, these agencies are helping brands thrive through organic search. And at the top? A newly supercharged player blending performance marketing with next-gen technology.
1. Passion Digital
Recently acquired by leading US technology firm Pixis.ai, Passion Digital is now operating at the forefront of AI-powered SEO. With AI and automation embedded into every facet of their organic and GEO (Generative Experience Optimisation) strategies, they’re helping brands unlock scalable growth through data-rich insights and imaginative delivery.
Passion Digital’s proposition has always married performance and creativity. What sets them apart now is their AI-first approach—bringing intelligent forecasting, real-time optimisation and advanced content automation into the heart of SEO campaigns. Whether optimising for traditional SERPs, social search, AI overviews or LLMs, Passion is reimagining what it means to be visible in 2025.
Independently spirited and insight-obsessed, the agency combines nimble strategy with full-service capability. From in-depth technical audits to standout storytelling, every action is designed to deliver meaningful impact. And thanks to their heritage in purpose-led work, they remain grounded in ethical delivery, client collaboration, and imaginative problem-solving.
Clients: Knight Frank, Mazda, Nutanix, Octopus Investments, Ramble Worldwide
SEO Specialisms: AI-powered SEO, GEO (Generative Experience Optimisation), B2B SEO, digital strategy, content marketing
Prices: Flexible retainers and bespoke project scopes, from £2,000
Reviews: 4.8 on Google
Website: https://passion.digital
2. Found
Website: https://www.found.co.uk
Found is a multi-award-winning digital performance agency headquartered in London. Known for their trademarked Everysearch™ model, Found takes a platform-agnostic approach to organic search, spanning everything from Google and YouTube to TikTok and Amazon.
Their approach is designed for a fragmented search world, focusing on discoverability across all user journeys. By combining advanced data modelling with deep SEO expertise, Found crafts integrated campaigns that drive rankings, revenue and relevance.
With strong ties to Google and Microsoft, Found offers early access to platform innovations and tools, keeping clients one step ahead in a constantly shifting landscape.
Clients: Puma, Peacocks, Toolstation, ManyPets, Digital Realty
SEO Specialisms: Technical SEO, cross-platform optimisation, content and data integration
Prices: From £1,000+ project minimum
Reviews: 4.8 (Google)
3. The SEO works
Website: https://www.seoworks.co.uk
The SEO Works is a multi-award-winning agency delivering tangible organic growth for clients across the UK. With over a decade of experience and a laser focus on results, they’re known for combining data-led strategies with transparent reporting and measurable outcomes.
Their approach blends technical SEO, content marketing and digital PR—making them a strong partner for brands that want to grow sustainably and see clear return on investment. Whether it’s a local business looking to dominate regional search or a national brand scaling its ecommerce footprint, The SEO Works delivers with rigour, consistency and commercial awareness.
They also offer a comprehensive in-house development capability, which sets them apart for clients needing seamless SEO and site optimisation under one roof.
Clients: Decathlon, NHS, Sheffield Hallam University, House of Oak
SEO Specialisms: Digital PR, ecommerce SEO, WordPress and Magento SEO
Prices: From £1,000+
Reviews: 4.9 (Google)
4. Impression
Website: https://www.impressiondigital.com
Impression is a full-service digital agency that puts experimentation and performance at the core of its SEO approach. Their proprietary tech stack and analytical culture mean every campaign is designed for measurable business growth.
Impression delivers robust organic strategies driven by user research, SERP behaviour and cutting-edge testing. They are particularly well-suited to ambitious brands seeking to align SEO with broader performance marketing goals.
Clients: Clarins, Specsavers, Funky Pigeon, Topps Tiles
SEO Specialisms: Enterprise SEO, CRO, analytics, content and technical SEO
Prices: From £25,000+
Reviews: 4.9 (Google)
5. Brave Bison
Website: https://bravebison.com
Brave Bison is a modern media and marketing agency helping brands grow through content, search, and digital transformation. Their SEO practice is deeply technical, yet creatively sharp—ideal for enterprise clients with complex needs.
They blend first-party data, content intelligence and best-in-class tech to design scalable SEO strategies. From site migrations to search strategy overhauls, Brave Bison is known for its big-picture thinking and commercial impact.
Clients: New Balance, Currys, KFC, ghd
SEO Specialisms: Enterprise SEO, technical SEO, taxonomy, analytics
Prices: From £75,000+
Reviews: 5.0 (Google)
6. Propeller
Website: https://www.propeller.co.uk
Propeller is a digital agency specialising in hospitality, food & drink, lifestyle and retail. Their SEO offering is designed to meet the specific needs of brands that rely on high visibility and rich storytelling.
They deliver detailed SEO strategies across site structure, content and local optimisation. Their campaigns are grounded in analytics and designed to deliver real business outcomes, not just rankings. From menu schema to Google Maps dominance, Propeller ensures brands are found at the exact moment users need them.
Clients: Twinings, Zizzi, Sushi Samba, Young’s, Kellogg’s
SEO Specialisms: Local SEO, content strategy, technical SEO
Prices: From £10,000+
Reviews: 4.9 (Google)
7. Croud
Website: https://www.croud.com
Croud is a global digital agency powered by a distributed network of 2,400+ digital experts. Their in-house team leverages Croud Control™ and SEO.max technology to create scalable organic strategies, blending speed and precision.
Croud specialises in complex, multi-market SEO strategies and advanced content automation—ideal for brands seeking to scale fast across regions and platforms.
Clients: The North Face, Honda, Vans, AllSaints
SEO Specialisms: Enterprise SEO, automation, localisation
Prices: From £10,000+
Reviews: 4.8 (Google)
8. Re: signal
Website: https://resignal.com
Re:signal is an award-winning SEO agency focused exclusively on ecommerce and performance marketing. With a lean team model and a tailored approach, they deliver SEO solutions built for measurable growth.
Their methodology targets core growth drivers: technical health, site structure, scalable content and link acquisition. Re:signal is known for its agility, strategic insight and track record with some of the world’s biggest ecommerce players.
Clients: ASICS, Expedia, FatFace, Reformation
SEO Specialisms: Ecommerce SEO, link acquisition, international SEO
Prices: From £5,000+
Reviews: 3.4 (Google)
9. ROAST
Website: https://weareroast.com
ROAST are a digital performance media agency based in London, UK. They are part of the TIPi Group, which also includes sister agencies Kitty (web design and development) and Rabbit & Pork (voice experience)
Clients: Audible, Camelot, Rightmove, Aveva
SEO Specialisms: Technical SEO, content strategy, and link building
Prices: From £10,000+
Reviews: 4.8 (Google)
10. The Good Marketer
Website: https://thegoodmarketer.co.uk
The Good Marketer is a digital marketing agency that focuses on helping small and medium-sized businesses (SMBs) grow, expand, and achieve their digital marketing goals. They aim to be an extension of their clients’ teams, providing expertise across a wide spectrum of digital marketing channels
Clients: Relco London, Bling, Halo Hydration, Pan-n-Ice
SEO Specialisms: E-commerce SEO, Digital PR
Prices: From £825+
Reviews: 4.8 (Google)