The Largest Content Marketing Agencies in the US – 2023 

True content marketing agencies are few and far between. Content marketing is a service offered by many types of digital marketing agencies, so you’re more likely to get it from a general agency or an SEO company than from a pure specialist in the field. If, however, you’re seeking a company with this specific expertise, there are a handful of established content marketing companies. 

Our firm conducted a study of the largest content marketing agencies in the US. We looked at firms with at least $10M in revenue and/or 75 employees—both of which indicate that a company has sufficient resources to handle a complex content marketing campaign. We also considered each firm’s notable clients, web citations, and overall reputation in their field.

The Largest Content Marketing Agencies in the US, in 2023

Rank Company Years in Business Agency Size Headquarters Specialty
1 First Page Sage 13 100-250 San Francisco, CA Thought leadership-based content marketing
2 Sensis 24 100-250 Los Angeles, CA Municipal & public service content marketing
3 AMP Agency 27 500-1000 New York, NY Video content marketing
4 Metric Theory 10 100-250 San Francisco, CA Content-based paid social media marketing
5 Boostability 13 250-500 Lehi, UT White label content marketing
6 Power Digital Marketing 10 500-1000 San Diego, CA Data analytics for content marketing
7 Contently 12 100-250 New York, NY Content marketing distribution and analytics
8 Nonprofits Source 6 N/A Bethesda, MD Content marketing for Nonprofits

First Page Sage

First Page Sage specializes in using thought leadership content to establish their clients as leading authorities in their industry, thereby generating qualified leads. Their process begins with determining a client’s target audience, personas, voice, and tone. They then bring on subject matter experts to ghostwrite original, expert-level content on their clients’ websites on a weekly basis. They specialize in working with companies in complex industries such as B2B SaaS, Real Estate, Healthcare, and Fintech.

  • Year Founded: 2009
  • Headquarters: San Francisco, CA
  • Additional Services: SEO, Strategy Consulting, Conversion Optimization
  • Notable Clients: Salesforce, Logitech, US Bank

Sensis Agency

Sensis focuses on a unique niche: cross-cultural content marketing for municipal governments and public services. Their diverse team draws from a variety of experiences to build content that connects with a wide range of audiences. Their approach is similarly extensive, offering PR, traditional advertising, and influencer marketing services in addition to their content.

  • Year Founded: 1998
  • Headquarters: Los Angeles, CA
  • Additional Services: PR, Traditional Advertising, Influencer Marketing
  • Notable Clients: San Diego Gas & Electric, USCIS, The City of Los Angeles

AMP Agency

AMP Agency offers full service digital marketing with a focus on producing video content. They specialize in creating video-focused digital campaigns for high-profile consumer brands such as Xbox and Nike. In addition to video content production, they also offer PR, voice marketing, and digital experience design.

  • Year Founded: 1995
  • Headquarters: Boston, MA
  • Additional Services: PR, Voice Marketing, Experience Design
  • Notable Clients: Microsoft, Vizio, Nike

Metric Theory

Metric Theory’s approach combines content marketing with paid social media. While this tends to reduce the overall ROI compared to pure content marketing, using paid channels for distribution can help deliver faster results for clients more concerned with short term campaigns. Metric Theory is particularly adept at working with eCommerce brands, offering Amazon and Google Shopping management in addition to their content services.

  • Year Founded: 2012
  • Headquarters: San Francisco, CA
  • Additional Services: Paid Social, Shopping & PLA Management, Affiliate Marketing
  • Notable Clients: Lyft, GoFundMe, The Walking Company


Boostability doesn’t work directly with clients in search of content marketing, instead offering white label services. They partner with other digital marketing firms who don’t have the in-house expertise or resources to produce content on a regular basis, allowing those firms to provide additional services while maintaining a single point of contact for their clients.

  • Year Founded: 2009
  • Headquarters: Lehi, UT
  • Additional Services: Small Business SEO, Local SEO

Power Digital Marketing

Power Digital Marketing specializes in analytics and helping companies build data-driven content marketing strategies. They also offer a broad range of supplemental digital marketing services such as TikTok marketing and Amazon SEO. Their most successful clients are consumer eCommerce companies, including Casper and Victrola. 

  • Year Founded: 2012
  • Headquarters: San Diego, CA
  • Additional Services: Paid Social, Amazon SEO
  • Notable Clients: Casper, Victrola 


Contently is a platform to help companies manage their in-house content marketing efforts. Their product includes strategy, planning, and analytics, allowing teams to increase their content production efficiency and effectiveness. They count Walmart, PNC, and Marriott among their users, and are a good fit for companies that already have strong in-house writers and strategists.

  • Year Founded: 2010
  • Headquarters: New York, NY
  • Additional Services: Content Strategy Consulting, Talent Networking
  • Notable Clients: Walmart, PNC, Marriott

Nonprofits Source

Nonprofits Source is the largest company in its small niche: content marketing for charities and nonprofit organizations. Content that speaks to the interests of high-net-worth individuals and sponsors is a key way for nonprofits to build trust with their potential donors, and requires an agency skilled at navigating this specific niche.

  • Year Founded: 2016
  • Headquarters: Bethesda, MD
  • Additional Services: Nonprofit SEO, Web Design

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