Top B2B Marketing Agencies in 2026

VCCP Business is the business-to-business division of the VCCP creative group. In B2B Marketing's 2025 Global Agencies Benchmarking Report it moved from fifth place the previous year to first, reporting gross income of US$270 million, an increase of nearly 6% year on year. Trade coverage of the same report also placed it first in the content marketing and thought leadership category. The ranking is based on gross income from B2B activity across geographies. Its scale comes partly from being able to draw on a wider consumer-advertising group, which distinguishes it from single-discipline B2B specialists further down this list.

dentsu B2B is the B2B agency of the Japanese holding company dentsu. It traded as Merkle B2B, and trade coverage of the 2025 global report described it as rebranded to dentsu B2B; dentsu's own site still uses both names. The unit held second place in the 2025 Global Agencies Benchmarking Report with US$152 million in gross income. In the 2026 U.S. report it ranked first in the U.S. market by gross income. dentsu states that it employs more than 900 B2B specialists worldwide. Its main distinguishing feature is access to a holding company's data, CRM and media capabilities within a dedicated B2B practice.

Gravity Global is a B2B agency group with offices listed in London, Oxford, Norwich, Ashford, Houston, Dallas, Denver, Los Angeles, Minneapolis, Hong Kong, Shanghai and Nha Trang. In September 2021 the UK private equity fund Elysian Capital invested in the business to fund international expansion, following three acquisitions over roughly the previous eighteen months. Gravity Global placed third in the 2025 Global Agencies Benchmarking Report, where it was also the second-fastest grower by absolute gross income, adding US$4 million. It ranked third in the 2026 U.S. report. Its homepage presents case studies for Embraer, Airbus, Honda Powersports and the Michigan Economic Development Corporation, and lists sector teams for aerospace, healthcare, public sector and manufacturing.

Marketbridge is an independent B2B go-to-market agency with offices in Washington, D.C., London and Toronto and a team it describes as more than 350 people. In B2B Marketing's 2026 U.S. Agencies Benchmarking Report, published in June 2026, it ranked second overall by gross income from U.S. clients and first in both the brand and demand generation categories, according to the agency. In August 2026 it announced that the 2026 Global Agencies Benchmarking Report, which assessed fourteen agencies, had named it the top-ranked and fastest-growing independent global B2B agency and placed it in the global top five; it reported 19% gross income growth and 41% team growth. Clients named on its site include Lloyd's Register, FIS, Epiroc, BioCatch and Westcoast.

The MX Group is an independent B2B agency founded in 1989 with its office in the Chicago area. It works in a transatlantic partnership with Bray Leino of the UK; the alliance was ranked fifth-largest B2B agency worldwide in the 2025 Global Agencies Benchmarking Report. In 2026 the wider GlobalAgility network, of which MX is a member, was named the third-largest B2B agency globally on combined gross income of US$113.4 million. On its own, MX cites 2025 U.S. rankings as seventh-largest B2B agency and second-largest independent, and it appears in the 2026 U.S. top ten. Testimonials on its site come from Zekelman Industries, PMI, WHOOP Unite and vAuto.

Fahlgren Mortine is an integrated communications agency headquartered in Columbus, Ohio, with offices in Cleveland, Dayton, Boise, Denver, Chicago and New York City. It placed fourth in B2B Marketing's 2026 U.S. Agencies Benchmarking Report. In May 2024 The Shipyard, another Columbus agency, completed its acquisition of Fahlgren Mortine from Eastport Holdings, which had owned it since 2018; the brand was retained and the combined company reported 400 staff and US$350 million in billings. Its site cites work for DHL Supply Chain that won a SABRE Award, along with a PRSA Silver Anvil as midsize agency of the year, reflecting a public relations heritage.

Bader Rutter is a Milwaukee-headquartered B2B agency with an additional office on Chicago's Michigan Avenue. It ranked fifth in B2B Marketing's 2026 U.S. Agencies Benchmarking Report. The agency has a long association with agricultural and animal health clients; its site names Zoetis, McCain Foods and the Milwaukee Bucks as clients, and its fiftieth-anniversary announcement described McCain as its newest partner. Its chairman and chief executive, Jeff Young, has described the firm as measuring client relationships in decades rather than years. Its homepage links to BBN, an international network of B2B agencies, but does not describe the relationship in detail.

Walker Sands was founded in 2001 and has offices in Chicago, Boston, Seattle and San Francisco. It lists itself as the sixth-ranked U.S. B2B marketing agency in B2B Marketing's benchmark, and it appears in the 2026 U.S. top ten. The agency reports ten appearances on the Inc. 5000 list of fast-growing companies, a 2025 Chicago Tribune Top Workplace award, and a finalist place for B2B Marketing Agency of the Year (North America) in B2B Marketing's Elevation Awards. Its case studies name Breakthrough, Aptos, Entrust and Sendbird, and client logos include Sophos and Ensono.

Ledger Bennett was founded in 1985 by Nicholas Ledger and operates across EMEA, Asia-Pacific and North America. Havas announced its acquisition on 12 February 2024 and merged its own Havas Business unit into the agency, creating a B2B specialism of more than 100 people within Havas Media Network. In the 2025 Global Agencies Benchmarking Report it was the fastest-growing agency, adding US$7.6 million in gross income, a 67.9% increase. Havas named GE Digital and LinkedIn as clients at the time of the acquisition, and the agency's site carries case studies for GE Vernova, Canon, Acxiom and Trend Micro.

Mower is a 100% employee-owned agency structured as an ESOP; its history traces to a small Syracuse firm that Eric Mower joined in 1968 and bought outright in 1980. In B2B Marketing's 2025 U.S. Agencies Benchmarking Report, which ranked agencies on gross income and U.S. headcount, Mower placed eighth among 29 agencies and fifth among brand specialists. The agency lists the ANA's B2B Agency of the Year award for 2022 to 2025 and describes itself as the only independent full-service agency ranked in marketing, advertising and public relations.

Transmission describes itself as a global B2B marketing agency and the largest global independent B2B agency, a claim the agency makes itself. Its London office is listed first, alongside offices in San Francisco, New York, Dallas, Sydney, Singapore, Delhi and Wroclaw, and it states a headcount of more than 250 worldwide; the trading company is Pulse Comms Ltd, registered in England and Wales. Its site features work on Windows 11 Pro, Snapdragon X Elite and AutoStore, and lists awards including B2B Marketing Agency of the Year (North America) at the 2026 Elevation Awards and Gold at The Drum Awards in 2024 and 2025.

Stein, which formerly traded as Stein IAS and still uses the legal entity Stein IAS Holdings Ltd, is part of the agency group MSQ Partners. It lists regional hubs in New York, London, Manchester, Amsterdam, Singapore and Shanghai. Logos shown in its work section include GE Healthcare, HSBC, Merck, Samsung, Sodexo, Wolters Kluwer, Celonis and US Bank, though the site does not label each as a current client. The agency describes itself as one of the most highly awarded B2B agencies but does not list specific awards on its homepage.

Velocity Partners is a B2B agency with offices in London and New York, co-founded by Doug Kessler. It was sold to the UK marketing group Next 15 in July 2017, shortly after opening its New York office and the year after winning a Content Marketing Agency of the Year award. Next 15 was then led by chief executive Tim Dyson, and Velocity's founders remained with the business after the sale, which the agency announced in a post by Kessler, its executive creative director. Client logos on its site include Salesforce, Workday, HubSpot, Amazon, Citrix, LiveRamp, Quantexa and Trustpilot.