Company lists · Marketing & advertising · Data verified August 2026
Top 25 B2B demand generation agencies in the US
There are 3,455 B2B demand generation agencies headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 45,784 professional contacts across them, including 10,446 with verified work emails and 10,141 with mobile numbers. Most are boutiques of 10 or fewer people; New York is the largest hub.
This list covers US-headquartered agencies whose core business is B2B demand generation: outbound and inbound pipeline programs, paid media, ABM and lead generation services. Ranked by employee count, largest first. Data current as of August 28, 2026.
The 25 largest demand gen agencies in the US
Ranked by employees| # | Agency | Verified emails |
|---|---|---|
| 1 |  Demandscience | 423 |
| 2 |  Infuse | 142 |
| 3 |  Green House Agency, INC | 118 |
| 4 |  Informa Engage | 41 |
| 5 |  RUI | 24 |
| 6 |  Lakeb2b | 20 |
| 7 |  Pardot | 20 |
| 8 |  Boom Demand | 7 |
| 9 | Netscout | 3 |
| 10 | Upwork, Fiverr, Peopleperhour | 1 |
| 11 |  Anteriad | 348 |
| 12 |  Digitas UK | 285 |
| 13 |  Gravity Global | 250 |
| 14 |  S2w Media | 127 |
| 15 |  Icrossing | 115 |
| 16 |  Thinkdirect Marketing Group | 9 |
| 17 |  Lauchlan NOW The Channel Company | 3 |
| 18 | Flexisales Marketing Pvt. LTD | 3 |
| 19 |  Actualtech | 0 |
| 20 | Sober Business Solutions LLC | 0 |
| 21 |  B2B Data Partners | 0 |
| 22 |  Span Global Services | 0 |
| 23 | C&b Marketing Solutions | 0 |
| 24 |  Logix Online Solutions | 0 |
| 25 |  Qualified Acquired By Salesforce | 199 |
| 26 |  Transmission | 178 |
| 27 |  Walker Sands | 142 |
| 28 |  Unboundb2b | 131 |
Showing 25 of 3,455 US demand generation agencies
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US demand gen agencies at a glance
As of Aug 28, 2026Agencies by employee count
How this list was built
- Source
- The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
- Inclusion
- Companies whose own business descriptions match “B2B demand generation agencies”, with match quality audited by blind human judging (86% on-target), and headquartered in the United States.
- Ranking
- Employee count, largest first. Ranges reflect verified bands, not estimates.
- Verification
- Contact records re-verify on a rolling cadence; 220 contacts on this list were re-verified in the last 30 days.
- Refresh
- Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.
Frequently asked
What does a B2B demand generation agency do?
A demand generation agency builds and runs the programs that create qualified pipeline for B2B companies: outbound prospecting, paid media, ABM, SEO and content, and lead nurture. Unlike brand agencies, they are measured on pipeline and revenue, not impressions.
How many B2B demand generation agencies are there in the US?
There are 3,455 B2B demand generation agencies headquartered in the United States as of August 2026 (RevenueBase).
What is the largest demand generation agency in the US?
Demandscience, headquartered in Boston, is the largest company on this list at 1,001-5,000 employees.
Which city has the most demand gen agencies?
New York leads with 199 headquartered agencies, followed by San Francisco (94) and Los Angeles (86).
How do I get contact information for these agencies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 10,446 verified decision-maker contacts tracked across these 3,455 agencies.
How current is this list?
The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.
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About this data
RevenueBase is a B2B contact data platform. Its company graph covers 21.3 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph, the same data that powers RevenueBase's B2B data products and the free research portal.