Top B2B Marketing Agencies In The UK: 2026

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The B2B Marketing UK Agencies Benchmarking Report is back and better than ever, featuring brand-new sections, a unique look at the marketing landscape and much more, utilizing data from 65+ of the top marketing agencies in the UK.

Kicking off with our league tables, we revealed insights around the highest gross income, YoY growth, fastest growing agencies and much more. For a glimpse on the top 10 UK marketing agencies, see below:

  1. Dentsu B2B
  2. Bray Leino
  3. Ledger Bennett, a Havas company
  4. Gravity Global
  5. Brands2Life
  6. tmp
  7. IMG: Intermedia Global
  8. Transmission
  9. Twogether (a PRETZL Company)
  10. Omne

Following that, we have revealed the top specialist marketing agencies in fields such as market & strategy planning, demand generation, thought leadership and much more. We also feature a unique case study and expertise from our content specialist, Storythings. And if you’re looking for an agency’s work, philosophy, achievements, sectors or more, check out our sponsored section.

New to our report include a client satisfaction section, which goes through the metrics that matter to client-side marketers: NPS scores, average deal size, client retention rates, pitch rates and customer testimonials – all in an effort to showcase more commercial metrics. Finally, instead of a global map, we have included a regional map of the UK so you can see where agencies are located. Looking for an agency in London? We got you.

Whether you’re searching for digital, creative  or advertising services, or just on the hunt to see the biggest marketing agencies in the UK, this report is chock-full of stats and data to bring to the boardroom. 

If you’re an agency, check out your competition. If you’re a client-side marketer looking for an agency, we have given you the perfect benchmarking tool to narrow down your search. Download the report today.

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