Last Updated: March 13, 2025
True content marketing agencies are few and far between. Content marketing is often relegated to one of several services offered by many digital marketing agencies, leading to average content and poor results. If you’re seeking a company that specializes in content that engages and converts members of your target audience, dedicated agencies are a much better choice.
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 overall experience, founders, average reviews, and employee tenure when ranking them below.
The Largest Content Marketing Agencies in the US, in 2025
| Rank | Company | Established | Founder Led | Leadership Experience Score | Average Review Score | Median Employee Tenure | Media References | Specialty |
| 1 | First Page Sage | 2009 | Yes | 4.8 | 4.9 | 4.3 years | ~630 | Thought leadership-based content marketing |
| 2 | Sensis | 1998 | Yes | 4.6 | 4.7 | 3.4 years | ~80 | Municipal & public service content marketing |
| 3 | AMP Agency | 1995 | No | 4.5 | 4.6 | 2.8 years | ~200 | Video content marketing |
| 4 | Metric Theory | 2012 | Yes | 4.3 | 4.6 | 3.1 years | ~120 | Content-based paid social media marketing |
| 5 | Boostability | 2009 | Yes | 4.4 | 4.5 | 7 years | ~270 | White label content marketing |
| 6 | Power Digital Marketing | 2012 | Yes | 3.3 | 4.3 | 1.3 years | ~370 | Data analytics for content marketing |
| 7 | Contently | 2010 | Yes | 3.5 | 4.0 | 3.2 years | ~3,900 | Content marketing distribution and analytics |
| 8 | Nonprofits Source | 2016 | Yes | 3.8 | 4.4 | No data | ~490 | 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
| Summary of Online Reviews |
| First Page Sage is an “incredibly organized and communicative” agency that “takes the idea of excellence seriously” through their focus on “content that is designed to drive leads through the marketing funnel.” |
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
| Summary of Online Reviews |
| Sensis is an “excellent partner” that “provides excellent communication, flexibility, and management” for clients to provide a “high degree of marketing experience.” |
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
| Summary of Online Reviews |
| AMP Agency is a “flexible and responsive” agency that provides “multiple marketing services” to provide “increased sales and better site management.” |
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
| Summary of Online Reviews |
| Metric Theory’s “highly adaptable” teams excel at providing “strong strategic and tactical knowledge of the google channels,” contributing to “impressive results.” |
Boostability
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
| Summary of Online Reviews |
| Boostability is a “professional organization” that utilizes “excellent customer service” and “diligent work” to create “great increase in organic traffic.” |
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
| Summary of Online Reviews |
| Power Digital Marketing goes “beyond the client’s expectations” that utilizes “invaluable input, sound strategies, and reports” to create “significant growth in all KPIs.” |
Contently
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
| Summary of Online Reviews |
| Contently uses a “simple and transparent” onboarding process with account teams that “focus on clients’ key needs” in order to “streamline workflows.” |
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
| Summary of Online Reviews |
| Nonprofits Source “can analyze a website in seconds” in order to “convey marketing goals and project vision” to a wide variety of clients, resulting in “successful project completion.” |
The Top Content Marketing Agencies in the US, by Industry
Our team has researched the top content marketing agencies for each of the following industries:
The results can be found in the tables below:
The Top SaaS Content Marketing Agencies
| Rank | Content Marketing Agency |
| 1 | First Page Sage |
| 2 | AMP Agency |
| 3 | Metric Theory |
| 4 | Boostability |
| 5 | Contently |
The Top Financial Services Content Marketing Agencies
| Rank | Content Marketing Agency |
| 1 | First Page Sage |
| 2 | Sensis |
| 3 | AMP Agency |
| 4 | Metric Theory |
| 5 | Boostability |
The Top Healthcare Content Marketing Agencies
| Rank | Content Marketing Agency |
| 1 | AMP Agency |
| 2 | First Page Sage |
| 3 | Metric Theory |
| 4 | Sensis |
| 5 | Nonprofits Source |
The Top Real Estate Content Marketing Agencies
| Rank | Content Marketing Agency |
| 1 | Metric Theory |
| 2 | First Page Sage |
| 3 | AMP Agency |
| 4 | Boostability |
| 5 | Contently |
Request a Copy of This Report
If you’d like to request a PDF copy of this report or learn more about our methodology, you can reach out to us here.
