Best AI SEO Agencies in London (2026): 25 GEO Agencies With Real London Offices, Checked

How we checked these agencies

• We started with every agency in our AI SEO & GEO agencies and AI marketing agencies directories, then added London agencies we found by researching UK search agencies. We left out freelancer marketplace profiles (Fiverr, Upwork, OnlineJobs).
• Real London office. We read each agency’s address from its own website and matched the postcode to a London borough. We left out agencies whose only London address is a known virtual office or mail-forwarding address. Shared workspaces such as TOG and Spaces count, because staff work there.
• A live AI search service. Each agency needed its own page selling GEO, AEO, AI SEO or AI search optimisation. An SEO page that mentions AI in passing didn’t count.
• Only published facts. Founding years, team sizes, clients, results and prices come from the agency’s own website, linked in each entry. We didn’t contact any agency, and we don’t repeat claims we couldn’t source.
• Not a ranking. Agencies are grouped by area of London. Nobody paid to appear, and listing on Digital Marketing Supermarket played no part in who made the cut.

In this guide

1. The 25 London AI SEO agencies
2. Comparison table
3. AI SEO agencies by London borough
4. How to choose an AI SEO agency in London
5. What AI SEO agencies in London charge
6. Who we left out, and why
7. Guides for other places
8. FAQs

1. Passion Digital

Office: 4th Floor, Holborn Tower, WC1V 6PL (Camden)

Best for: Brands wanting GEO run alongside paid, content and PR

Passion Digital calls its service “GEO Agency in London” and splits it into four parts: AI Overview and AI Mode optimisation, LLM tracking and performance measurement, GEO and LLM optimisation using its own deep research tool (DRX), and entity optimisation. The page says it tracks “AI share-of-voice” and zero-click visibility and links them to business outcomes, and it names the team members who work on AI search.

Read the Passion Digital listing · Source: Passion Digital GEO page · Website

2. Found

Office: Johnson Building, 77 Hatton Garden, EC1N 8JS (Camden) · Founded: 16+ years

Best for: Mid-size and large brands wanting GEO plus PR, PPC and social

Found’s GEO service covers AI result and citation analysis, structured Q&A content, schema and llms.txt, citable resources built through digital PR, LLM tracking with its own Luminr platform, and team training. Its about page says it has 90+ marketing experts and 16+ years of experience. A case study block on its GEO page reports a 56% traffic increase and +273% attributed revenue, though that block doesn’t name the client.

Read the Found listing · Source: Found GEO page · Website

3. Varn

Office: Fox Court, 14 Gray’s Inn Road, WC1X 8HN (Camden) · Founded: 15+ years

Best for: Technical, data-led teams; agentic shopping readiness

Varn works from its “AI Visibility Framework”, which benchmarks where a brand is cited across AI platforms, checks structured data and source credibility, and tracks sentiment. It also runs an Agentic Shopping Readiness Audit that looks at how usable a site is for AI shopping agents. Varn says it has more than 15 years in search, and its head office is near Bath (Bradford on Avon), with the London office at Fox Court. GEO and AI search training starts from £395 per person.

Read the Varn listing · Source: Varn GEO page · Website

4. Medico Digital

Office: 344–354 Grays Inn Road, WC1X 8BP (Camden) · Founded: 2015

Best for: Healthcare, pharma and medical organisations

Medico Digital works only in healthcare. Its GEO framework rests on three pillars, starting with plain-English, clinically reviewed content that AI answer engines can safely summarise. It begins with an AI visibility audit across Google AI Overviews and AI Mode, ChatGPT, Perplexity and Copilot. The agency was founded in 2015, according to its about page.

Read the Medico Digital listing · Source: Medico Digital healthcare GEO page · Website

5. Hallam

Office: Gridiron Building, 1 Pancras Square, N1C 4AG (Camden)

Best for: B2B and considered-purchase brands wanting measurable LLM share

Hallam’s AI search team combines technical SEO, “AI conversational strategy” and digital PR citation work, measured with its own Share of LLM benchmarking report. It says it won the European Search Award for Best LLM adoption and integration by an agency in 2026. Hallam is employee-owned and a B Corp. Its head office is in Nottingham, and its London team is in King’s Cross.

Read the Hallam listing · Source: Hallam AI search page · Website

6. Havas Market

Office: HKX Building, 3 Pancras Square, N1C 4AG (Camden) · Founded: 2005 (as Search Laboratory)

Best for: Retail and ecommerce brands wanting SEO and GEO in one programme

Havas Market used to be Search Laboratory, which was founded in Leeds in 2005. It joined the Havas network in 2021 and merged into Havas Market UK in January 2025, creating what it calls a 150-strong agency. Its GEO page says it runs SEO and GEO “side by side”, working on content, entity signals and authority so that AI engines retrieve and cite a brand. The agency also has a commerce and Amazon practice.

Read the Havas Market listing · Source: Havas Market GEO page · Website

7. JBH

Office: TOG, 210 Euston Road, NW1 2DA (Camden) · Founded: 2013

Best for: Brands that want GEO driven by digital PR and brand mentions

JBH started as a digital PR agency, founded in 2013 by three friends and colleagues, and has offices in London and Manchester. Its GEO page says it uses “advanced NLP, brand mentions, and digital PR” to improve visibility in AI search and LLMs for B2B and B2C brands, from startups to global enterprises. Its London base is in a TOG workspace at King’s Cross.

Read the JBH listing · Source: JBH GEO page · Website

8. Go Up

Office: 20 Old Street, EC1V 9AB (Islington) · Founded: 2011

Best for: Brands wanting GEO and AEO built into an existing SEO and PR campaign

Go Up splits AI SEO into GEO (being eligible to appear in generative answers) and AEO (being the strongest answer for intent-led and voice queries). It also offers AI search consultancy and LLM performance tracking that covers citation frequency and context. It says its SEO campaigns are now optimised for ChatGPT, Claude, Gemini and Perplexity as standard, and that it has been running since 2011.

Read the Go Up listing · Source: Go Up AI SEO & GEO page · Website

9. SALT.agency

Office: 5 St John’s Lane, EC1M 6BH (Islington)

Best for: Technical SEO-led brands; ecommerce feeds for AI shopping

SALT.agency’s AI search optimisation service includes LLM visibility monitoring across ChatGPT, Claude and Gemini, AI sentiment and relevance audits, and ACP feed optimisation for AI-led shopping. It measures results through LLM visibility, GA4 set up for AI referral traffic, and repeatable prompt audits. The team publishes its own research, such as an “Entity Strength Index”. It also has an office in Horsforth, Leeds.

Read the SALT.agency listing · Source: SALT.agency AI search optimisation page · Website

10. Brainlabs

Office: White Collar Factory, EC1Y 8AF (Islington) · Founded: 2012

Best for: Large and enterprise brands

Brainlabs is the largest agency on this list. It says it grew from two people in 2012 to more than 1,000 staff. Its AI search optimisation page cites work for Microsoft’s GitHub: +400% year-on-year traffic to marketing pages and 29% LLM visibility, which it says led the category. That work won first place at the SEMrush AI Visibility Awards 2025. The service covers mentions, citations, third-party authority and accuracy across ChatGPT, Gemini, Perplexity and Google AI Mode.

Read the Brainlabs listing · Source: Brainlabs AI search optimisation page · Website

11. Precis

Office: 3–7 Herbal Hill, EC1R 5EJ (Islington) · Founded: 2012

Best for: Retail and ecommerce brands with heavy JavaScript sites

Precis calls this work AEO (answer engine optimisation) and splits it into four parts: technical SEO for LLM visibility, such as removing JavaScript barriers so AI crawlers can read product details; AEO content strategy; LLM authority building through digital PR and reviews; and AEO auditing and reporting. Precis was founded in 2012, and its contact page lists offices including London, Barcelona and Gothenburg.

Read the Precis listing · Source: Precis AEO services page · Website

12. Ellis Digital

Office: 72–74 Dean Street, Soho, W1D 3SG (Westminster) · Founded: 2015

Best for: SMEs wanting a monthly GEO retainer with clear reporting

Ellis Digital’s GEO service is built on six pillars: content structuring, authority building, platform-specific optimisation, citation tracking, competitor analysis and regular audits. It reports monthly. On its FAQ, the agency says nobody can guarantee AI mentions. It was founded in 2015 and has offices in Soho and Guildford.

Read the Ellis Digital listing · Source: Ellis Digital GEO page · Website

13. GA Agency

Office: 33 Broadwick Street, Soho, W1F 0DQ (Westminster)

Best for: International and multilingual brands

GA Agency is an international agency, and its GEO service focuses on multilingual and localised content written in a structured, conversational way, with in-house multilingual specialists checking tone. It covers Google AI Overviews, Bing Copilot, ChatGPT and Perplexity, and tracks performance by market. Its about page lists search awards, including a UK Search Awards win in 2021.

Read the GA Agency listing · Source: GA Agency GEO page · Website

14. ROAST

Office: 1st Floor, 53 Frith Street, W1D 4SN (Westminster)

Best for: Consumer brands wanting category-level AI brand measurement

ROAST offers three ways to measure LLM visibility. Its AI Brand Index asks LLMs thousands of questions across six brand vectors. It also measures consumer preferences and runs key-phrase tracking at 25, 300 or 500+ phrases, with daily data from Google AI Overviews, Perplexity and ChatGPT and a monthly list of sites to target for citations. It sells bespoke GEO packages, from brand-led to shopping strategies.

Read the ROAST listing · Source: ROAST GEO page · Website

15. Re:signal

Office: 20 Eastbourne Terrace, W2 6LG (Westminster)

Best for: eCommerce brands

Re:signal describes itself as “the GEO agency for eCommerce brands”. It works on LLM recommendations, answer engines and agentic commerce across ChatGPT, Gemini, Perplexity, Claude and AI Overviews. It is one of the few London agencies that publishes a price: a fixed-fee AI Discoverability Audit from £10,000 ($15,000), with an ongoing GEO programme scoped as a monthly retainer. It also has a Manchester office.

Read the Re:signal listing · Source: Re:signal GEO page · Website

16. ClickSlice

Office: Studio 10, Shoreditch Stables, 138 Kingsland Road, E2 8DY (Hackney) · Founded: 2016

Best for: Ecommerce and Shopify brands

ClickSlice was founded by Joshua George in 2016 and now describes itself as an ecommerce growth agency, with separate GEO and AEO service pages.

Read the ClickSlice listing · Source: ClickSlice GEO page · Website

17. Kaizen

Office: 3rd Floor, Zetland House, 5–25 Scrutton Street, EC2A 4HJ (Hackney) · Founded: 2013

Best for: Brands wanting GEO tied to digital PR outreach

Kaizen was founded in 2013 in a flat in Hackney and now says it has a team of 40+. Its GEO and AI search work includes AI-friendly content, LLM visibility tracking, prompt bank audits, entity mapping, and using frequently cited sources to build PR prospect lists. It calls itself “one of the UK’s first ChatGPT SEO agencies”. Kaizen also has an office in Salford.

Read the Kaizen listing · Source: Kaizen GEO / AI search page · Website

18. Gripped

Office: 140–148 Borough High Street, SE1 1LB (Southwark) · Founded: 2017

Best for: B2B SaaS and tech companies

Gripped is a B2B SaaS marketing agency founded in 2017, and its GEO page is written for software companies. It works on how AI models describe a vendor, which sources they draw on, and whether the company’s positioning is consistent across the web. It is clear that GEO isn’t a replacement for SEO and isn’t about “gaming AI tools”.

Read the Gripped listing · Source: Gripped GEO page · Website

19. Impression

Office: Typewriter Building, 140 Borough High Street, SE1 1LB (Southwark)

Best for: Mid-size and large brands wanting PR, content and technical GEO together

Impression describes GEO as a multi-disciplinary process: PR and social to build the brand, content that LLMs can use, and technical GEO so AI crawlers can find it. It says it has 120+ staff and offices in Nottingham (its head office), London, Manchester and New York, and it is a certified B Corp.

Read the Impression listing · Source: Impression GEO page · Website

20. Absolute Digital Media

Office: 35 New Broad Street, EC2M 1NH (City of London) · Founded: 2008

Best for: Regulated industries: iGaming, finance, legal, healthcare

Absolute Digital Media runs GEO, AI SEO and AEO as one “AI Visibility” service, with versions for casino, sports betting, financial services and other regulated sectors. It was founded in 2008 by Ben Austin. Its about page lists 20+ specialists, 97% client retention and 175+ industry awards, and it has a second office in Essex.

Read the Absolute Digital Media listing · Source: Absolute Digital Media AI visibility page · Website

21. Rise at Seven

Office: 6 Bevis Marks, EC3A 8JQ (City of London)

Best for: Consumer brands that want to be the most-cited brand in their category

Rise at Seven’s AI visibility and GEO service covers AI share of voice, prompt research, citation analysis, brand sentiment, onsite technical and entity work, and offsite signals. Its page shows LLM share-of-voice work for Revolution Beauty and InSinkErator. Its head office is in Manchester, it has a New York office, and its about page says it has won 79 global awards.

Read the Rise at Seven listing · Source: Rise at Seven AI SEO page · Website

22. SUSO Digital

Office: Rotunda Building, Westworks, 195 Wood Lane, W12 7FQ (Hammersmith and Fulham) · Founded: 2010

Best for: Agencies wanting a white-label GEO partner; brands wanting PR-led GEO

SUSO has done SEO since 2010 and says 80% of its revenue now comes from partnerships with agencies and consultants, so it’s a natural white-label choice. Its GEO service covers AI visibility audits, LLM content optimisation, digital PR and Reddit marketing, tracked with its own AI Visibility Checker. Its GEO page reports +321% AI conversions for a global healthcare brand and +102% AI traffic over six months for a trading platform.

Read the SUSO Digital listing · Source: SUSO Digital GEO page · Website

23. TAIMA (The AI Marketing Agency)

Office: 12 Hammersmith Grove, W6 7AP (Hammersmith and Fulham)

Best for: SMEs, SaaS firms and corporates wanting fixed-price GEO packages

TAIMA describes itself as a full-service AI marketing agency that pairs human creativity with AI. Its Generative Engine Optimisation page covers entity optimisation, LLM visibility audits, knowledge graph mapping, authority building, citation management and performance monitoring across ChatGPT, Perplexity and other LLMs. It is one of the few agencies here that publishes GEO prices: Starter at £1,500 a month, Pro at £3,000 a month and Enterprise from £6,000 a month, each with a one-off setup fee. Its office is in a serviced workspace building at 12 Hammersmith Grove.

Read the TAIMA (The AI Marketing Agency) listing · Source: TAIMA GEO page · Website

24. Reboot Online

Office: 727–729 High Road, North Finchley, N12 0BP (Barnet)

Best for: Brands that want GEO backed by PR and testing

Reboot Online calls itself a specialist GEO agency. It analyses how AI systems retrieve, summarise and cite a brand across branded and unbranded prompts, maps visibility across AI answers, and benchmarks AI citation share against competitors. It also runs GEO roundtables and training. Its office is in North Finchley.

Read the Reboot Online listing · Source: Reboot Online GEO page · Website

25. Figment

Office: 1 Bucklands Wharf, Kingston upon Thames, KT1 1TF (Kingston upon Thames) · Founded: 2006

Best for: Expert-led professional services firms

Figment focuses on expert-led and professional services firms. Its “Generative Search Optimisation” service centres on clear, credible content written to be cited in ChatGPT and Gemini. It says it has helped 300+ businesses since starting in 2006.

Read the Figment listing · Source: Figment LLM optimisation page · Website

Red flag: guaranteed AI rankings

No agency controls what ChatGPT or Gemini says, and answers change with the prompt, the user and the model. Ellis Digital says on its own FAQ that nobody can guarantee AI mentions. Treat any promise of “guaranteed” AI placement with caution.

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