902 agencies indexed·Latest entry: 16 October 2026
Service · 535 agencies

SEO agencies.

SEO is the discipline of earning the right traffic from Google for free, plus - increasingly in 2026 - being chosen, cited, and summarised by AI answer engines like ChatGPT, Perplexity, and Google's AI Overviews. Done well it compounds. Done poorly it's expensive theatre.

At a glance
  • 535 UK agencies offering seo
  • Across 42 UK locations
  • Reviewed 17 May 2026
Showing 529-535 of 535 seo agenciesView in full archive
Pimento logo
Pimento
Independent·London·1000+ Employees

Pimento, a leading full-service UK-based agency, is celebrated for its extensive network of independent digital, marketing agencies, businesses, and consultants. Pimento's unique strength lies in its capacity to craft tailor-made teams that meticulously match the specific briefs of clients, utilising a wide talent base to fulfil diverse marketing, business, and technology requirements. Providing a

Climb Online logo
Climb Online
Independent·London·11-50 Employees

Climb Online is a forward-focused marketing agency dedicated to empowering the next generation of global brands. Following its acquisition by global digital group xDNA in 2022, the agency continues to champion ambition, innovation, proactivity, and inclusivity, equipping clients with a competitive edge in a constantly evolving marketplace. Operating from offices in London, Glasgow, Manila, and Per

Tiga Creative Marketing logo
Tiga Creative Marketing
Independent·Kent·11-50 Employees

Established a quarter-century ago, Tiga is an agency with clients in the UK, Europe and the US, specialising in a broad spectrum of creative services, including design, development, content crafting and campaign marketing, catering to a diverse range of sectors. Our accomplished team of designers, developers and marketers boast comprehensive experience across multiple digital landscapes, having wo

Opace Digital Agency logo
Opace Digital Agency
Independent·Birmingham·2-10 Employees

As a comprehensive digital agency headquartered in Birmingham, Opace is renowned for its sincere and clear-cut methodology. With a 15-year track record of providing innovative digital marketing solutions, Opace has been instrumental in aiding UK and international businesses to realise digital transformation through outcome-focused strategies. The distinguishing factor for Opace is its dedication t

Nautilus Marketing logo
Nautilus Marketing
Independent·London·11-50 Employees

Nautilus Marketing, a London-based comprehensive digital marketing agency, is renowned for its distinct fusion of creativity and pioneering thought. Catering to a global clientele, the agency excels in delivering customised digital marketing strategies, with an emphasis on enjoyable, customer-centric experiences. Operating on a no-contract basis and prioritising open dialogue, Nautilus Marketing s

PATTRNS logo
PATTRNS
Independent·London·11-50 Employees

Pattrns is a London-based digital marketing agency, extending its services to Nashville and Dubai. Our agency specialises in a wide range of digital marketing solutions, encompassing SEO, paid search, and social media management, with a dedicated emphasis on platforms such as TikTok, Google, and Shopify. Recognised for our data-centric approach, Pattrns leverages advanced AI and machine learning t

Jellyfish logo
Jellyfish
Network·London·1000+ Employees

Jellyfish is an integrated global digital marketing business founded in 2005 and headquartered at The Shard in London. Since June 2023 it has been part of The Brandtech Group, uniting media, creative and data through technology and generative AI.

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Editor's note
The UK has roughly 476 agencies that put SEO at the top of their service list. They split into three buckets: boutique consultants and small specialist shops charging £500-3,000 a month; mid-market agencies running fuller programmes at £1,500-7,500; and network or holding-group agencies billing £7,500-20,000 and up for enterprise work. In 2026 the discipline has expanded. Traditional ranking optimisation still matters - Google Search Central is clear that crawlability, helpful content, and trust signals carry the same weight as they always did. But visibility now also means being cited in AI Overviews and surfaced by ChatGPT and Perplexity. Most credible UK agencies are quietly absorbing this as Generative Engine Optimization (GEO) without making it a separate service line. A few are loud about it. Watch for which.
Typical cost
£500-20,000+
per month, retainer

Boutique / freelance £500-3,000 · Mid-market £1,500-7,500 · Network £7,500-20,000+. One-off audits £1,500-10,000.

Realistic timeline
3-12 months
to compounding results

1-3mo technical foundations · 3-6mo ranking and traffic gains · 6-12mo+ revenue compounding.

Red flags
5 to watch
in any pitch
  • · Guaranteed rankings or 'top 3 in 30 days' promises
  • · Pure performance-based pricing (misaligns incentives)
  • · Aggressive link building or 'private networks' (PBNs)
  • · Vague reporting that won't connect to revenue
  • · No request for Search Console + analytics access
Frequently asked

What brands ask about seo agencies.

5 questions our editors get most often, answered honestly. No agency-marketing speak.

Curated by humans

UK SEO retainers in 2026 split into three tiers: boutique consultants and small specialist shops run £500-3,000 a month, mid-market agencies £1,500-7,500, and network or holding-group shops £7,500-20,000+. One-off audits land between £1,500 and £10,000 depending on site complexity. Pure performance-based pricing exists but tends to misalign incentives - Google Search Central itself warns against providers leaning on guarantees rather than process.