Best B2B Marketing Agencies in the US: 2026

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The B2B Marketing US Agencies Benchmarking Report is back -  bigger, sharper, and packed with fresh insights into the US agency landscape. Drawing on data from more than 20 leading B2B marketing agencies across the US, this year’s edition introduces brand-new sections and deeper commercial analysis, making it essential reading for agencies and marketers alike. 

The report opens with our industry league tables, revealing the agencies leading the market in gross income, year-on-year growth, fastest growth rates, and more. For a glimpse on the top 10 B2B marketing agencies in the US, see below:

  1. Dentsu B2B
  2. Marketbridge
  3. Gravity Global
  4. Fahlgren Mortine
  5. Bader Rutter
  6. Walker Sands
  7. Rabinovici & Associates
  8. Pretzl
  9. MX
  10. tmp

Alongside our Rising Stars, Fastest Growers, and top-earning agencies, we’ve also spotlighted the leading specialist agencies across demand generation, content marketing, and brand. To bring these specialisms to life, agencies including Pretzel and Keys & Kites share expert perspectives and exclusive case studies showcasing their work and approach. 

New for this year, the report also includes a dedicated client satisfaction section focused on the metrics that matter most to client-side marketers, including NPS scores, average deal size, client retention rates, pitch rates, and customer testimonials – offering a more commercial and transparent view of agency performance.

We’ve also replaced the global map with a dedicated US agency map, making it easier to explore where agencies are located across the country.

Whether you’re searching for digital, creative, advertising services or simply benchmarking the largest B2B marketing agencies in the US, this report delivers the data and insights you need for smarter decision-making.

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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