The 10 best SEO agencies in the UK (2026)

The best SEO agencies in the UK in 2026 include The SEO Works, Exposure Ninja, Reboot Online and Bird Marketing. We reviewed each agency's own website and its public Clutch listing, then ranked ten on service depth, published evidence, AI-search (GEO and AEO) capability and transparency. Last checked 17 October 2026.

Comparison table

How we ranked them

We reviewed each agency's own website and its public Clutch listing on 17 October 2026. We scored five things:

1. Service depth: dedicated SEO services (technical, content, local, links).
2. Published evidence: named clients and results the agency publishes, which we attribute and never restate as fact.
3. AI search: whether it offers GEO, AEO or AI-visibility work.
4. Independent signals: Clutch rating, review count, awards and certifications as shown on the listing.
5. Transparency: clear scope, pricing signals and reachable contacts.

Ratings change often, and review counts differ between Clutch category pages. Treat this list as a starting shortlist, then verify current figures yourself. Spotted an error or want your agency reviewed? Tell us and we will correct it.

The agencies

1. The SEO Works

An employee-owned agency established in 2009 with 80+ specialists, according to its site. Results published include Meadow Bay Villages (revenue up over 102%, sessions up 200.2% in year one) and a seating manufacturer with a 60% share of voice in AI Overviews.

• Based: Sheffield, London and Leeds, UK
• Services: SEO (technical, local, content, digital PR), GEO, AEO, PPC, paid social, programmatic, web
• AI search (GEO/AEO): Both GEO and AEO listed
• Clutch: 4.8 from 58 reviews · minimum project $1,000+

Evidence:

• Established 2009; employee owned; 80+ specialists (per its site)
• Meadow Bay Villages: revenue +102%, sessions +200.2% in year one (per its site)

Worth knowing: One of the most-reviewed UK specialists on Clutch's SEO ranking. Visit The SEO Works →

2. Exposure Ninja

An SEO and AI-search agency serving B2B, B2C, finance, healthcare, legal and manufacturing brands. Case results on its site include The Ordinary (395% ROI), Service Professionals (199% more organic traffic) and Value Capital Funding (640% more conversions). It is a Certified B Corporation.

• Based: London and Nottingham, UK
• Services: SEO, AI search optimisation (GEO), content and digital PR, paid media, CRM and email, website and CRO, branding
• AI search (GEO/AEO): AI search optimisation including GEO
• Clutch: Not shown on the Clutch pages we reviewed

Evidence:

• Case results on its site: The Ordinary 395% ROI; Service Professionals +199% organic traffic
• Certified B Corporation; lists SEO Agency of the Year 2026 awards

Worth knowing: Also offers branding and paid media, so scope the SEO team separately. Visit Exposure Ninja →

3. Reboot Online

A search agency for enterprise and mid-market brands. Its homepage lists Best Large SEO Agency (GSA 2026), Standout Organic Content Campaign of the Year (UKDEA 2026) and GEO Campaign of the Year (PRmoment 2026).

• Based: London, UK (fully remote team)
• Services: SEO, GEO, digital PR, "AiPR", hyper-relevant link building, training and consultancy
• AI search (GEO/AEO): Generative Engine Optimisation (GEO) service; GEO roundtables
• Clutch: Not shown on the Clutch pages we reviewed

Evidence:

• Awards listed on its homepage: GSA 2026, UKDEA 2026, PRmoment 2026

Worth knowing: Specialist organic-search focus; paid media is not its core offer. Visit Reboot Online →

4. Bird Marketing

A multi-office agency pairing technical SEO with web development. Case studies include Supermicro (new organic users up from 749,720 to 1,901,214 between 2022 and 2024), Snappic (organic sessions up 45.5% year on year) and The Only Way Is Granite (organic traffic up 673%).

• Based: London, UK (offices in Billericay and Glasgow)
• Services: SEO (technical, local, mobile, ecommerce, international), PPC, social, web design and development, branding
• AI search (GEO/AEO): AI-search visibility assessment and a GEO service
• Clutch: 5.0 from 74 reviews · minimum project $5,000+ · 10–49 employees

Evidence:

• Supermicro: organic users 749,720 to 1,901,214 (2022 to 2024, per its site)
• Lists Clutch, GoodFirms, Manifest and DesignRush awards

Worth knowing: Strong public case-study depth in enterprise tech and SaaS. Visit Bird Marketing →

5. ROAST

An independent agency founded in 2015 whose clients include Experian, Rightmove, Skyscanner and The Independent. Case results include PitchBook (+22% free-trial conversion) and WEX (+916% paid leads). It is a Certified B Corp and a Google Premier Partner 2026, and reports 93% client retention (self-reported).

• Based: London, UK (offices in Cape Town and New York)
• Services: SEO (technical and content), GEO, ASO, digital PR, paid media, influencer, data and measurement, web and CRO
• AI search (GEO/AEO): GEO listed
• Clutch: 4.9 from 17 reviews · minimum project $5,000+ · 50–249 employees

Evidence:

• Founded 2015; Certified B Corp (91.1 points); Google Premier Partner 2026 (per its site)
• Independent Agency of the Year, UK Agency Awards 2026 (per its site)

Worth knowing: Aimed at mid-market and enterprise budgets. Visit ROAST →

6. Found

A full-stack search and performance agency for ecommerce, hospitality, travel, B2B, finance, SaaS, fintech and luxury brands. Its site lists ISO 27001, Google Premier Partner 2026 and a Standout PPC Agency award from the UK Digital Excellence Awards 2026, with a Toolstation case study showing a 40% year-on-year uplift.

• Based: London, UK (office in New York)
• Services: SEO, GEO, PPC, paid social, programmatic, digital PR, content, influencer, data and AI, analytics, CRO
• AI search (GEO/AEO): AI SEO and GEO listed
• Clutch: Not shown on the Clutch pages we reviewed

Evidence:

• ISO 27001; Google Premier Partner 2026 (per its site)
• UK Digital Excellence Awards 2026: Standout PPC Agency of the Year

Worth knowing: A broad performance remit; confirm the SEO team and reporting cadence. Visit Found →

7. believe.digital

A ten-person agency founded in 2010 for service businesses and ecommerce brands, typically turning over £500k to £20m. A published case study for a central London dental practice shows 26 of 28 targeted regions ranking no. 1 on Google and organic traffic up 80% year on year.

• Based: Bristol, UK
• Services: SEO, GEO, Google Ads, social, email, performance marketing, web development, analytics
• AI search (GEO/AEO): GEO covering ChatGPT, Perplexity, Claude and Google AI Overviews
• Clutch: 5.0 from 7 reviews · minimum project $1,000+ · 10–49 employees

Evidence:

• Founded 2010; team of ten (per its site)
• Google Partner; Bristol Business Awards 2025; Clutch Top PPC and Digital Marketing Company badges

Worth knowing: Declines gaming, gambling and adult clients, per its site. Visit believe.digital →

8. Odyssey New Media

A Birmingham agency delivering results since 2010, with listed outcomes including Mint Technology (+169% organic traffic), Wheres The Match (+533% organic conversions) and Appoly Group (+800% total conversions). It is a Google Partner and Reviews.co.uk Recommended.

• Based: Birmingham, UK
• Services: SEO, PPC, social, web design and development, mobile apps, ecommerce, branding
• AI search (GEO/AEO): "AI Optimisation (AIO)", Local AI Optimisation and AI Citation Building listed
• Clutch: 4.9 from 29 reviews · minimum project $5,000+ · 10–49 employees

Evidence:

• Results listed on its site: Mint Technology +169% organic traffic; Appoly Group +800% conversions
• Corporate LiveWire Birmingham Prestige Awards 2019: Digital Agency of the Year

Worth knowing: Offers mobile apps and web builds alongside SEO. Visit Odyssey New Media →

9. M3.agency

A multi-office creative and digital agency whose clients include Balfour Beatty, MG, Disney, Harley-Davidson, Aston Villa FC and the Co-op. It is a Certified B Corp, holds Cyber Essentials, and lists Clutch Top Digital Marketing Company 2025 and Google Premier Partner status.

• Based: Birmingham, UK (offices in London, Manchester, Telford, Cardiff and Dubai)
• Services: Creative, branding, SEO, GEO, PPC, content, social, email, digital PR, programmatic, web and app development, ecommerce, CRO
• AI search (GEO/AEO): GEO listed
• Clutch: 5.0 from 11 reviews · minimum project $1,000+ · 50–249 employees

Evidence:

• Certified B Corp; Cyber Essentials; Google Premier Partner (per its site)
• Clutch Top Digital Marketing Company 2025 and Top Ecommerce Marketing Agency 2025 (per its site)

Worth knowing: Case studies on its site show titles without metrics. Visit M3.agency →

10. A‑Vintage Digital (our own agency)

Disclosure: this is our own agency. We placed it using the same criteria as the others, and we tell you plainly what is and is not proven.

A‑Vintage Digital is a Nigeria-based, fully remote agency. It is not located in the UK, and we list it here as an option for the UK businesses comfortable working with a remote specialist team, not as a local agency. Its strongest fit is publishers, hospitality and multilingual businesses, or companies that want SEO, GEO and AEO and the website or app build from one team.

• Services: SEO, GEO and AEO; web design and development; Android and iOS app development; multilingual SEO; digital marketing; product building
• AI search: GEO and AEO are core services
• Founder: Akindayo Rufus Akintayo, SEO Specialist and Manager
• Third-party reviews: No third-party reviews yet. We list ourselves transparently and apply the same evidence standard as every other agency.

Published evidence:

• Kharis Publishing: +500% organic traffic growth and #1 rankings for core publishing keywords
• The Legacy Villa: page-one rankings for direct-booking keywords
• Venostis: one Italian site indexed and ranking in three languages
• Seven of our own products built, optimised and marketed in-house

Request a free audit SEO, GEO and AEO services → SEO in Nigeria →

How to choose a SEO agency in the UK

1. Ask for sector case studies: Results from your industry and market matter more than headline percentages.
2. Check AI-search capability: Ask how they work on Google AI Overviews, ChatGPT and Perplexity visibility: see our GEO guide and AEO guide.
3. Understand who does the work: Ask for the named strategist, reporting cadence and what happens if rankings stall.
4. Confirm technical depth: Request a sample audit covering crawl, indexing, Core Web Vitals and structured data.
5. Review contract terms: Look for a clear scope, a sensible minimum term and no ownership lock-in of your content or accounts.

Frequently asked questions

What is the best SEO agency in the UK?

On our public-evidence review, The SEO Works ranks first, followed by Exposure Ninja and Reboot Online. The best agency for you depends on your sector, budget and goals, so shortlist two or three and ask for sector references.

How much does a SEO agency in the UK cost?

Clutch listings for the agencies here show minimum project sizes from about $1,000 up to $25,000 or more, with $1,000 and $5,000 the most common. Monthly retainers vary by scope, so request a written proposal.

Do these agencies work on AI search (GEO and AEO)?

Many now list AI search, GEO or AEO services, but depth varies. The comparison above notes what each agency states publicly, and you should ask for examples.

Can I trust a list published by an agency that appears on it?

You should read it critically. We disclose our own entry, attribute every claim to its source, and ask readers to verify details. If you spot an error, tell us and we will fix it.

Does A‑Vintage Digital work with the UK businesses?

Yes, remotely. A‑Vintage Digital is Nigeria-based, and has delivered work for a US publisher (Kharis Publishing) and a multilingual Italian business (Venostis). Request a free audit to discuss your project.

More agency lists

• SEO agencies in Nigeria
• SEO agencies in US
• SEO agencies in Canada
• Digital marketing agencies in UK

Sources

Each agency's own website, plus Clutch directory pages for SEO and digital marketing companies, reviewed on 17 October 2026. Awards and results are reported as the agency presents them.