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Top Advertising Companies in the UK

188 of 497 advertising companies ranked on evidence in the Q4 2026 edition.

We list 23 advertising companies in the UK. The order comes from what each firm publishes and what has been verified about it, never from payment — at the top right now: Hydrant, CRISP and KAT Marketing.

Before you shortlist, check

  • Campaigns they ran for businesses your size, with results you can verify
  • How media is bought, and whether they take commission or rebates on it
  • Who owns the creative, and for how long you can use it
  • The reporting you will get, and from whose systems

TrustList ranking

Q4 2026 edition

188 of 497 advertising companies ranked on evidence held on 9 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

The SME ranking on this page lists 473 small and medium-sized agencies, and 101 of them earned a rank number. One business known to be large is left out, and the SME order does not reward age. See the SME ranking

Filter by fitbudget, engagement, size and more

Only businesses that have told TrustList match a filter. Filters never change the order or a score.

  1. Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
  2. GT4 Design + Web logo

    Branding · eCommerce · Also in Renfrew and Glasgow

    GT4 Design + Web is a branding and web design company in Blantyre, South Lanarkshire, Scotland, serving Hamilton and the surrounding area.

    On record: Based in Blantyre, South Lanarkshire, Scotland

  3. GWS Media logo

    Consumer Products & Services · Advertising & Marketing · Business Services · Also in Bristol and Wales

    GWS Media is a full-service digital marketing agency working from offices near Bristol Temple Meads station.

    On record: Based in near Bristol Temple Meads, England

  4. H&H logo

    Arts, Entertainment & Music · Advertising & Marketing · Business Services

    H&H is an internal communications agency in the UK. It designs campaigns that help large employers shift culture, explain change and keep staff engaged, drawing on behavioural…

    On record: Based in UK

  5. Hall & Partners logo

    Hall & Partners is a research agency that helps marketers make decisions from consumer insight. It grew out of the advertising world and mixes creative thinking with data analysis.

    On record: Address in United Kingdom · Small consultancy

  6. Hammer Design logo

    Arts, Entertainment & Music · Energy & Natural Resources · Advertising & Marketing

    Hammer Design is a graphic design and creative marketing studio working in and around the Peak District in Derbyshire.

    On record: Based in Derbyshire, England

  7. Hanson Brown Creative Ltd logo

    Advertising & Marketing · Business Services · Creative · Also in Sunderland

    Hanson Brown Creative Ltd is a small marketing and design agency in Keighley, West Yorkshire.

    On record: Based in Keighley, England

  8. Harmonypark logo

    Creative · eCommerce · Responsive

    Harmonypark is a digital studio based in Hackney, London. It supplies the technical side of digital projects for creative companies, from studios to start-ups.

    On record: Based in Hackney, London, UK

  9. Hatch Communications logo

    Consumer Products & Services · Creative · Video · Also in Leeds and London

    Hatch Communications is an independent creative communications agency with offices in Leeds and London.

    On record: Based in Leeds and London, UK

  10. Hatch Creations Ltd logo

    Creative · Medical · Advertising

    Hatch Creations Ltd, known as Hatch, is a graphic design studio in South London.

    On record: Based in South London, UK

  11. Headline logo

    Headline is a venture capital investor that backs companies across several sectors and at any stage of growth.

    On record: Based in San Francisco, Paris, London, São Paulo, Taipei and Tokyo · Boutique

  12. Heckford logo

    Retail · Education · Manufacturing

    Heckford is a marketing and creative agency in Preston, Lancashire. Design is the base of its work, and the team applies the same care to each project.

    On record: Based in Preston, Lancashire

  13. Heighton AGency logo

    Advertising & Marketing · Business Services · Branding

    Heighton AGency, which trades as HeightOn, is a brand, web and digital agency working with small and medium-sized businesses.

    On record: Based in Sussex, England

  14. Hello Starling logo

    Consumer Products & Services · Advertising & Marketing · Hospitality & Leisure

    Hello Starling is a media planning and buying agency that plans campaigns around the results each client cares about.

    On record: Address in United Kingdom

  15. Hex Digital logo

    Consumer Products & Services · Arts, Entertainment & Music · Non Profit

    Hex Digital is a digital agency in London that designs brands, marketing websites and digital products.

    On record: Based in London, UK

  16. HigherSites Group logo

    Arts, Entertainment & Music · Hospitality & Leisure · Business Services · Also in Wales

    HigherSites Group is a design and marketing agency based in Somerset, England.

    On record: Based in Somerset, England

  17. HighStreet Media logo

    Creative · SEO · Responsive · Also in England and Wales

    HighStreet Media is a creative, digital and print studio that serves clients in South Wales and, more widely, England and Scotland.

    On record: Based in South Wales, UK

  18. Hogarth Worldwide logo

    Business Services · Web Design · Digital Marketing · Also in Delhi and Asia

    Hogarth Worldwide is a production company that combines creative craft, insight and technology to deliver advertising and content work.

  19. Holdens logo

    Consumer Products & Services · Arts, Entertainment & Music · Hospitality & Leisure

    Holdens is a creative and marketing agency headquartered in Manchester with clients beyond the UK.

    On record: Based in Manchester, England

  20. HoneyBe Creative logo

    Hospitality & Leisure · Business Services · Information Technology · Also in Bedford

    HoneyBe Creative is a creative digital marketing agency in Exeter, Devon. It works with clients of every size, from start-ups and small firms to large enterprises.

    On record: Based in Exeter, Devon

  21. Hooke Design & Marketing Ltd logo

    Consumer Products & Services · Arts, Entertainment & Music · Hospitality & Leisure

    Hooke Design & Marketing Ltd is a UK multi-disciplinary design and marketing co-operative.

    On record: Based in United Kingdom, with work for clients in Ambleside and Preston

  22. HUB logo

    Advertising & Marketing · Business Services · Financial Services · Also in Leeds

    HUB is a creative marketing agency in London. Its current work centres on the financial services sector, where it helps boards, marketing teams and investment firms reach retail,…

    On record: Based in London

  23. Hughes Media Internet logo

    Internet

    Hughes Media Internet is a digital agency based in Worcester, England, that designs, builds and promotes websites. It says it works for companies in the UK and around the world.

    On record: Based in Worcester, UK

  24. Humanoid logo

    Advertising & Marketing · Non Profit · Creative · Also in Manchester

    Humanoid is a video production and strategy agency serving clients from Staffordshire and Birmingham.

    On record: Based in Staffordshire and Birmingham, England

  25. Hurtle Creative logo

    Creative · eCommerce · Goals · Also in Glasgow

    Hurtle Creative is a brand and creative agency in Glasgow. Its clients are owners and managers of businesses in Glasgow, in Ayrshire and elsewhere in the west of Scotland.

    On record: Based in Glasgow, Scotland

For vendors

Want to see your company here?

The order is earned on evidence: client reviews, vetting, awards and the facts a business states on its own website, which we read and date. Nobody can pay to move up. Add reviews or verified facts to your free profile to move up at the next edition; there are two ways to stand out now, and each one says what it is.

Not on TrustList yet? Add your company or claim its listing, free.

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  • We check your registration, your website and your clients
  • Approved listings show the Verified badge here and on their profile
  • It earns a rank number and counts towards the TrustList Score; renewed yearly

Sponsor this ranking

Paid · always labelled

  • A Sponsored card above the ranked list, up to three per ranking
  • Marked Sponsored, and it never changes the order
  • Booked by the month; cancel any time

How is this ranking worked out?

The order comes from what each firm publishes and what has been verified about it, and never from payment:

  • Profile completeness: the details a buyer needs to judge a firm — what it does, who it serves, how it prices, who it has worked for
  • Earned trust: verification, awards and the other checks a firm has actually passed
  • Client reviews, where they exist: the rating is smoothed, so one five-star review cannot outrank a firm with a hundred good ones, and volume counts with diminishing returns

Client reviews are still rare across this catalogue, so on most lists today the order is set by the first two. A firm near the top is the best-documented and best-verified one we hold, which is not the same claim as the best one to hire. Use the list to build a shortlist, then check the firms yourself.

Sponsored listings are labelled and shown apart from this list. How rankings work

Only firms whose profile names the UK are counted here, so a firm that lists a town but no country is not yet included.

Where else can I look?

The same list elsewhere: India (92) · Canada (41) · Australia (28).

Every category in the UK: the UK country page.

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