When a UK shopper asks ChatGPT or Google AI Overviews for the best brand in a category, a handful of names make the answer. AEO (answer engine optimisation) is the work of becoming one of them. Plenty of UK agencies now sell it. Fewer have ecommerce depth, and fewer still can change the store itself.
Editorial disclosure: Flux publishes this guide and is one of the seven agencies featured. It is an editorial shortlist, not an independent ranking. Details for each agency come from its own website and public listings, checked in October 2026.
How we picked these agencies
Each agency sells AEO, GEO or AI search optimisation as a named service, works with ecommerce or retail brands, and has a UK base. The order below is not a ranking.
Flux
Shopify Plus Partner with a team in London, plus Melbourne and Los Angeles. Flux implements AEO inside the store: product data and metafields, category and comparison content, templates and schema. It also publishes Found's UK lists, weekly AI visibility rankings for ecommerce brands across ChatGPT, Perplexity and Google AI Overviews, so recommendations start from what the engines currently say about each category.
Work runs as an AI visibility assessment or Lift, a 100-day implementation partnership. See Shopify AEO for the service detail.
Best for: Shopify Plus brands that want the fixes made in the store, not just a report. Less suited to brands that are not on Shopify.
ClickSlice
London SEO and AEO agency founded in 2016 by Joshua George, with roots in ecommerce SEO. Its AEO work starts with prompt mapping, then builds comparison guides, FAQs and schema, and tracks citations across ChatGPT, Gemini, Perplexity, Copilot and AI Overviews using Profound. It works on rolling monthly contracts rather than long lock-ins.
Best for: ecommerce brands that want a specialist search agency on flexible terms. Less suited to brands that need storefront development in the same engagement.
Charle
London Shopify Plus agency offering ecommerce design, development, CRO and SEO, with GEO and AI SEO built into its ecommerce practice.
Best for: Shopify brands that want design, conversion and AI search from one team. Brands with heavy ERP, B2B or multi-market integration needs may want a more engineering-led partner.
NOVOS
London-based, employee-owned ecommerce growth agency focused on how customers find products across organic search, paid media and AI platforms. NOVOS says it has worked with more than 250 ecommerce brands across the UK, US and Europe.
Best for: ecommerce brands that want organic search, digital PR and AI visibility from a specialist. Less suited to brands that need Shopify development handled by the same agency.
Found
London agency that brands itself the AI-first Everysearch agency. It built Luminr, its own platform for tracking visibility across Google AI Overviews, ChatGPT, Perplexity and other search surfaces, and is part of the Tomorrow Group. Found (found.co.uk) is a separate company from Flux's Found rankings.
Best for: brands that want AI search alongside paid media and full-funnel performance marketing. Less suited to brands that mainly need changes made inside their store.
Passion Digital
Search-led performance agency in London working with B2C and B2B brands. It offers GEO and AI search optimisation, with in-house tools that measure brand visibility in ChatGPT, Perplexity and Google AI Overviews, alongside PPC, paid social and digital PR.
Best for: brands that want AI search tied into a wider paid and organic programme.
SALT.agency
Technical SEO agency founded in 2014, with offices in Leeds, London and Boston, offering AI optimisation and multimodal search services. Its strength is international, multilingual and enterprise sites.
Best for: large catalogues and multi-market retailers with complex technical setups. Less suited to smaller brands after a light-touch engagement.
How to choose an AEO agency
Ask who makes the fixes. AI engines read your product data, category pages and schema. If the agency only delivers a report and articles, someone still has to change the store. Find out who that is before you sign.
Ask what they track. A credible agency can show the exact prompts it monitors, which engines and markets it covers, and how often it re-runs them. Mentions, citations, referral visits and sales are different numbers, so check which ones they report.
Ask about third-party sources. AI answers lean on reviews, directories and comparison articles as well as your own site. An agency that ignores off-site sources is only working on part of the answer.
For the in-store side of the work, read our AEO guide for Shopify Plus and how AI search works for ecommerce.
Where to start
Check where your brand stands first. Found's UK lists show which ecommerce brands AI engines name in each category. For a scored diagnosis of your own store, start with an AI visibility assessment, or talk to Flux about your Shopify store.
Which agencies do AEO for ecommerce brands in the UK?
Flux, ClickSlice, Charle, NOVOS, Found (found.co.uk), Passion Digital and SALT.agency all offer AEO or AI search optimisation to UK ecommerce brands. Flux and Charle are Shopify Plus agencies that implement inside the store. ClickSlice and NOVOS are ecommerce-focused search agencies. Found and Passion Digital are multi-channel performance agencies. SALT.agency specialises in technical and international SEO.
Which UK AEO agency is best for Shopify brands?
Flux and Charle are both Shopify Plus agencies with AEO services. Flux focuses on implementation inside the store, covering product data, metafields, templates and schema, and publishes weekly UK AI visibility rankings through Found. Charle combines design, CRO and AI SEO for Shopify storefronts.
What does an AEO agency do for an ecommerce brand?
It tracks how AI engines such as ChatGPT, Perplexity, Gemini and Google AI Overviews answer buying questions in your category, finds where your brand is missing or misdescribed, then fixes the causes: product data, category and comparison content, schema, crawl access and third-party sources.
How much does an AEO agency cost in the UK?
Pricing varies by scope. Some agencies work on rolling monthly retainers; others price after scoping markets, categories and how much store implementation is involved. Ask what is included: tracking only, content only, or changes to the store itself.
Is Found the same as Flux's Found?
No. Found (found.co.uk) is a London digital marketing agency. Found by Flux is Flux's set of weekly AI visibility rankings for ecommerce brands in Australia, the US and the UK, published at flux.agency/found.
How long does AEO take to show results?
There is no fixed timetable. Store and content changes can ship within weeks, but AI answers shift as engines re-crawl and as third-party sources change. Track a stable prompt set monthly and judge the trend rather than one week's answers.
Flux is a Shopify Plus Agency for Advanced Engineering & AEO
- Seven UK agencies offering AEO to ecommerce brands: Flux, ClickSlice, Charle, NOVOS, Found, Passion Digital and SALT.agency.
- Flux and Charle are Shopify Plus agencies that can implement inside the store. ClickSlice and NOVOS are ecommerce-focused search agencies.
- Found and Passion Digital pair AI search with wider performance marketing. SALT.agency suits large, technical and multi-market sites.
- The biggest difference between agencies is who makes the fixes: a report and content plan, or changes to product data, templates and schema.
- Ask every agency which prompts they track, how they measure, and how they handle the third-party sources AI engines cite.
