Best AI SEO Agencies for ChatGPT Visibility
Best UK AI SEO agencies specialising in ChatGPT visibility. Five agencies ranked on ChatGPT citation work and OpenAI search performance.
ChatGPT is the highest-volume AI search surface and the one most UK businesses ask about first. Earning ChatGPT citations requires entity authority, structured content that the model can parse, and a presence in the third-party sources OpenAI's web tier and SearchGPT draw from. The agencies below all have full ChatGPT coverage and published evidence of earning citations across consumer and B2B queries.
SEOCompare is the UK's independent comparison of AI search optimisation agencies and tools, helping businesses find the right partner for ChatGPT, Gemini, Perplexity, and AI Overviews visibility.
UK AI SEO Agencies Compared
ChatGPT-focused retainers on this page run from £1,500 a month (CarrieAnn Sudlow) to £4,000 a month (Found). Most engagements settle at £2,500 to £3,000.
| # | Agency | HQ | Best For | Pricing |
|---|---|---|---|---|
| 1 | Found | London, UK | Mid-market and enterprise brands wanting full-service SEO + AI search under one roof | From £4,000/mo |
| 2 | Charle | London, UK | Shopify and ecommerce brands wanting AI search + technical SEO together | From £3,000/mo |
| 3 | ClickSlice | London, UK | UK businesses wanting full AI search platform coverage at SME pricing | From £2,500/mo |
| 4 | CarrieAnn Sudlow | Manchester, UK | Founder-led SaaS and B2B brands wanting hands-on consultant access | From £1,500/mo |
Detailed Agency Profiles
Found
Found is a London-based agency, founded in 2005, with a team of 100+, covering AI SEO, GEO, AEO, PPC, across retail, b2b, travel. Mid-market and enterprise brands wanting full-service SEO + AI search under one roof. Proprietary tooling: Everysearch / Luminr. Watch-out: premium pricing puts smes out of range.
Strengths
- Proprietary tooling: Everysearch / Luminr
- Covers 4 AI platforms (ChatGPT, Gemini, Perplexity, AI Overviews)
- Sector evidence: Retail, B2B, Travel
- Team size: 100+
Watch-outs
- Premium pricing puts SMEs out of range
- Smaller team caps execution capacity at peak demand
Charle
Charle is a London-based agency, founded in 2014, with a team of 20-50, covering AI SEO, GEO, Shopify, Ecommerce SEO, across ecommerce, shopify plus, dtc. Shopify and ecommerce brands wanting AI search + technical SEO together. Watch-out: ecommerce focus may not fit b2b service businesses.
Strengths
- Covers 4 AI platforms (ChatGPT, Gemini, Perplexity, AI Overviews)
- Sector evidence: Ecommerce, Shopify Plus, DTC
- Team size: 20-50
- Services: AI SEO, GEO, Shopify, Ecommerce SEO
Watch-outs
- Ecommerce focus may not fit B2B service businesses
- Smaller team caps execution capacity at peak demand
ClickSlice
ClickSlice is a London-based agency, founded in 2018, with a team of 20-50, covering AEO, GEO, LLMO, AI SEO, across b2b, retail, local services. UK businesses wanting full AI search platform coverage at SME pricing. Watch-out: smaller team than enterprise specialists.
Strengths
- Covers 5 AI platforms (ChatGPT, Gemini, Perplexity, AI Overviews, Copilot)
- Sector evidence: B2B, Retail, Local services
- Team size: 20-50
- Services: AEO, GEO, LLMO, AI SEO
Watch-outs
- Smaller team than enterprise specialists
- Smaller team caps execution capacity at peak demand
CarrieAnn Sudlow
CarrieAnn Sudlow is a Manchester-based agency, founded in 2018, with a team of 1-5, covering AI SEO, GEO, Consultancy, across saas, b2b, service businesses. Founder-led SaaS and B2B brands wanting hands-on consultant access. Watch-out: single-consultant capacity caps execution volume; no team cover.
Strengths
- Covers 4 AI platforms (ChatGPT, Gemini, Perplexity, AI Overviews)
- Sector evidence: SaaS, B2B, Service businesses
- Team size: 1-5
- Services: AI SEO, GEO, Consultancy
Watch-outs
- Single-consultant capacity caps execution volume
- No team cover
How SEOCompare Picked These Agencies
SEOCompare reviewed 40+ UK and international agencies offering AI SEO and shortlisted those with published case studies, transparent pricing, and AI platform coverage relevant to this comparison. Selection criteria included AI platform breadth (ChatGPT, Gemini, Perplexity, AI Overviews coverage), sector evidence, contract flexibility, and team size. We do not accept payment for inclusion or placement.
Frequently Asked Questions
Which AI SEO agency is best for ChatGPT visibility?
Found has the deepest measurement infrastructure for ChatGPT citations in the UK. ClickSlice and Charle have published ChatGPT case studies. CarrieAnn Sudlow is the boutique pick for founder-led teams. Impression covers ChatGPT alongside organic ranking work.
How does ChatGPT decide what to cite?
ChatGPT pulls from training data plus, in newer versions, real-time web retrieval through SearchGPT. Citations favour entity-strong sources, named-author content, structured pages, and content that other authoritative sources reference. Optimising for ChatGPT means optimising for the underlying source quality.
Can I monitor ChatGPT citations for my brand?
Yes. Specialist agencies use proprietary tools to query ChatGPT and Perplexity at scale, log citations, and track share over time. Found and CarrieAnn Sudlow both run citation tracking. Some tools (Profound, Otterly) offer self-serve tracking for in-house teams.
How much does ChatGPT-focused AI SEO cost?
£1,500 to £4,000 a month. ChatGPT visibility work usually overlaps with broader AI search programmes covering Gemini, Perplexity, and AI Overviews, since the underlying signals are similar. Buying ChatGPT-only is unusual and usually inefficient.
Should I optimise for ChatGPT or Gemini first?
Both, simultaneously. The underlying entity and content signals overlap heavily. The differences are in measurement (Gemini ties to Google's organic surface, ChatGPT runs more independently) rather than in the optimisation work itself.
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Oliver Mackman
AI Search Analyst, SEOCompare
Oliver leads SEOCompare's editorial and comparison research. With over a decade in digital marketing, he oversees agency evaluation, tool testing, and AI search data analysis.
Last reviewed: 7 April 2026
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