What does a content marketing agency do?
A content marketing agency creates, manages, and distributes various forms of digital marketing content (blogs, whitepapers, video, social, email) for businesses that lack the in-house capacity to produce that volume consistently. The strong ones build strategy first (positioning, ICP, pillar topics), then execution. The weak ones start with execution.
What the firms actually sell
360 of the 1,738 US listings that publish a service list name content marketing. The adjacent lines say what the job covers in practice: 139 of those firms also list search engine optimization, 84 list social media marketing and 71 list public relations.
Content work in the US market is bought as distribution as much as production. 304 of the 360 firms run fewer than 50 people, so the writing, the search targeting and the placement usually come from one small team.
The minimum project size tells you which kind of engagement a firm expects. 220 of the 340 publishing one open at $5,000 or less, and 44 will not start below $25,000. The first group sells deliverables. The second sells programs.
How to use this
Ask for the last three pieces the firm produced for a client in your category and what happened to each one after publication. Production quality is easy to show. Distribution is where these engagements succeed or quietly stall.
How this was computed. Every figure on this page is counted from The Wall's own directory of approved, US-headquartered, machine-verified-live listings: 3,460 of them in the snapshot captured 2026-09-14. Rates, minimum project sizes, team sizes, founding years and ratings are provider-declared figures published on public profiles. 1,738 of those listings publish a service list, and that field holds at most 4 services per firm, so service counts are counts of what firms name first rather than everything they sell. Percentages of disclosed values exclude listings that publish no figure. Nothing here is modeled or estimated. Sourcing standards: editorial policy.
Why this matters
Google puts this question in People Also Ask for the "content marketing agency" query, which means buyers are asking it while they shop. The Wall answers it from the directory position: we index 3,460 verified US growth-services vendors across 10 pillars, so the figures above come from those records rather than from a survey.
If you are evaluating vendors in this category, the Content Marketing pillar page carries the full US firm list with rate, team size and headquarters filters.