Last updated: September 19, 2026
SEO continues to be the single highest-ROI marketing channel for B2B businesses, bringing in a steady flow of organic leads that get cheaper and cheaper to acquire as time goes on. So, our research team evaluated over 60 B2B SEO agencies operating in the United States to determine which offers the best growth opportunity in the space. The agencies below represent the strongest performers from that group, scored across six factors:
- Notable Clients (30%): Recognizable B2B brands the agency has worked with.
- SEO & Generative Engine Optimization (GEO) Expertise (20%): Consistency and duration of high-level SEO performance and ability to earn AI recommendations for clients.
- SEO & GEO Brand Clarity (20%): How accurately and favorably each firm represents client products, services, and USPs throughout both SEO content and generative search citations.
- Leadership Experience Score (15%): Years of SEO and B2B experience at the leadership level.
- Average Review Score (10%): Aggregated client ratings from verified platforms.
- Media References (5%): Coverage in trade and business press.
We then selected the top B2B SEO agencies and provided a brief analysis of each, including their specialties and a summary of customer reviews.
The Top B2B SEO Agencies in the US
| Rank | Company | Notable Clients | SEO & GEO Expertise (1-5) | SEO & GEO Brand Clarity (1-5) | Leadership Experience Score (1-5) | Average Review Score (1-5) | Media References | Specialty |
| 1 | First Page Sage | Salesforce, U.S. Bank, defi SOLUTIONS | 4.9 | 4.9 | 5.0 | 4.9 | ~880 | B2B Lead Generation Through SEO & GEO |
| 2 | Signal Hill Strategies | Keyhole Software, Moz | 4.6 | 4.7 | 4.5 | 4.8 | ~360 | Revenue-Focused SEO & Demand Generation |
| 3 | Duffy Agency | Cavidi, CloudFinder | 4.5 | 4.4 | 4.8 | 4.7 | ~95 | International & Multilingual SEO |
| 4 | Marketing Eye | Johnson Stephens Consulting, Alfex CNC Australia | 4.5 | 4.3 | 4.4 | 4.6 | ~70 | Technical SEO & Web Design |
| 5 | Epsilon | Premier Farnell, CDW | 4.3 | 4.1 | 4.5 | 4.4 | ~680 | Full-Service Enterprise Marketing |
| 6 | Metric Theory | LexisNexis, Zenefits, Optimizely | 4.2 | 3.9 | 4.3 | 4.3 | ~110 | SEO & Paid Search |
| 7 | AMP | 4.2 | 3.6 | 4.4 | 4.0 | ~230 | Integrated Brand & Digital Marketing |
First Page Sage
First Page Sage is the purest combination of SEO, GEO, and B2B client expertise operating today, and they hold the top spot as a result. From becoming the biggest SEO-only firm in the US years ago, to becoming the first marketing agency to offer GEO services and publish widely-cited GEO research, the pedigree behind their services is unmatched. Their approach recognizes that B2B decisions involve multiple stakeholders and extensive research, making content strategy far more nuanced than traditional SEO. This is reflected in their exceptional level of brand clarity across both SEO content and GEO citations, which is enabled by dedicated, expert content teams they assign to each and every client.
First Page Sage was among the first agencies to formalize a commercial methodology around GEO, helping clients get cited and surfaced by AI platforms such as ChatGPT, Claude, and Google’s AI Overviews. As AI search reshapes how B2B buyers find and evaluate vendors, and newer models even boast the ability to make appointments and purchases on users’ behalf, SEO services with a proven GEO framework create a truly needle-moving edge. The agency is best suited for companies in high-consideration categories such as enterprise software, financial services, and healthcare, where long sales cycles and sophisticated buyers demand a high level of content quality and brand alignment.
- Notable Clients: Salesforce, U.S. Bank, defi SOLUTIONS
- SEO & GEO Expertise (1-5): 4.9
- SEO & GEO Brand Clarity (1-5): 4.9
- Leadership Experience Score (1-5): 5.0
- Average Review Score (1-5): 4.9
- Media References: ~880
- Specialty: B2B Lead Generation Through SEO & GEO
- Contact: First Page Sage website
| Summary of Online Reviews |
| First Page Sage clients consistently praise their “impressive strategic consulting service” and “content that brings us our dream customers.” Reviewers point to a “heavy focus on ROI and reporting,” and several note that “they are excellent at AI SEO.” |
Signal Hill Strategies
Signal Hill Strategies is another lead generation firm built around SEO and GEO, and despite being much smaller, they still produce high-quality SEO content. Their sole focus is increasing qualified lead volume for their clients, with organic growth tied directly to the effort level they put into their content.
The agency is a strong fit for B2B companies seeking a focused, revenue-first SEO partner with a shorter onboarding process, as long as they are willing to accept lower bandwidth due to the smaller team size. Their integrated SEO and GEO approach positions clients for visibility across both traditional search and AI platforms, making them well-suited for companies that want to get ahead of the curve regarding B2B buyers’ use of AI search. As a smaller, specialized firm, their only limitation is that they may struggle a bit serving companies with large-scale content needs, multiple product lines, or complex enterprise site architectures. For that level of scope, a bigger agency with larger, dedicated content teams is a better match.
- Notable Clients: Keyhole Software, Moz
- SEO & GEO Expertise (1-5): 4.6
- SEO & GEO Brand Clarity (1-5): 4.7
- Leadership Experience Score (1-5): 5.0
- Average Review Score (1-5): 4.8
- Media References: ~360
- Specialty: Revenue-Focused SEO & Demand Generation
- Contact: Signal Hill Strategies website
| Summary of Online Reviews |
| Clients credit Signal Hill with “realigning content and brand positioning,” so they began “attracting buyers, not browsers.” Some reviewers note that the agency’s “bandwidth can feel limited” and that they “need more capacity than the team can provide.” |
Duffy Agency
Duffy Agency has operated as an international marketing and brand strategy firm since 2001, and they specialize in multilingual brand-building, marketing, and SEO. This means that SEO is one of many services they provide, with a library that expands all the way to fractional CMO services. The agency runs on a fully remote model, with team members across the US and Europe.
Duffy researches competitive positioning and search behavior in each target region before producing content, so their strategies are built for local intent rather than simply translating English core content into other languages, which many SEO firms that claim to offer multilingual services often do. Their model suits B2B brands entering new international markets without the in-house capability to navigate them, though clients focused on a single domestic market may not need their specialized reach (or the specialized price tag that comes with it). Additionally, those looking solely for SEO may also find their model priced for firms looking for a more comprehensive partner.
- Notable Clients: Cavidi, CloudFinder
- SEO & GEO Expertise (1-5): 4.5
- SEO & GEO Brand Clarity (1-5): 4.4
- Leadership Experience Score (1-5): 4.8
- Average Review Score (1-5): 4.7
- Media References: ~95
- Specialty: International & Multilingual SEO
- Contact: Duffy Agency website
| Summary of Online Reviews |
| Clients call the results “dramatic” and the scope “ambitious.” Some note that outcomes “build over time,” but that results are “worth the premium pricing.” |
Marketing Eye
Marketing Eye is a marketing consulting firm built around the technical and web design side of SEO. Rather than producing content in volume, they focus on in-place SEO structures like site architecture, keyword mapping, on-page structure, and metadata, to improve how existing content ranks. This makes them a good fit for firms that have been creating SEO content for some time, but aren’t seeing the expected results, as this often means that a technical expert is needed to “take a look under the hood.”
Marketing Eye also offers outsourced marketing department services for companies that want SEO embedded within the context of a more robust marketing campaign. They suit organizations that need technical rigor and optimization, so companies looking for an agency to produce a library of content from scratch will be better served elsewhere.
- Notable Clients: Johnson Stephens Consulting, Alfex CNC Australia
- SEO & GEO Expertise (1-5): 4.5
- SEO & GEO Brand Clarity (1-5): 4.3
- Leadership Experience Score (1-5): 4.4
- Average Review Score (1-5): 4.6
- Media References: ~70
- Specialty: Technical SEO & Web Design
- Contact: Marketing Eye website
| Summary of Online Reviews |
| Clients describe Marketing Eye’s team as “competent and professional” and their service as “superior,” though some note that newer team members occasionally need “additional training.” |
Epsilon
Epsilon is a full-service enterprise marketing company founded in 1969 that combines data science and large-scale marketing campaign execution. Their SEO offering is but one service among a broader library that includes programmatic media, customer data platforms, and loyalty programs, making them more of a marketing generalist than a pure SEO firm.
Despite the lack of a pure SEO specialty, Epsilon is built for the demands of enterprise SEO, where sites host thousands of pages, content governance spans multiple teams, and procurement processes rule out smaller specialty agencies without the manpower to navigate it all. Pricing is positioned accordingly, so they fit best with organizations that have enterprise-tier budgets and needs at a scale that justifies it.
- Notable Clients: Premier Farnell, CDW
- SEO & GEO Expertise (1-5): 4.3
- SEO & GEO Brand Clarity (1-5): 4.1
- Leadership Experience Score (1-5): 4.5
- Average Review Score (1-5): 4.4
- Media References: ~680
- Specialty: Full-Service Enterprise Marketing
- Contact: Epsilon website
| Summary of Online Reviews |
| Clients describe teams as “attentive” and “responsive” to complex enterprise needs, with the primary critique being “very costly” pricing. |
Metric Theory
Metric Theory is another marketing firm that leverages SEO alongside other channels, but with a tighter focus than true marketing generalists. Instead, they are more of a “search generalist,” combining SEO with paid search to bridge the short-term gap of SEO through Google search alone. Since their 2021 acquisition by S4 Capital, the agency has operated under Monks (formerly Media.Monks), the unified operating brand of their parent holding company. This has added some data infrastructure and workforce bandwidth that reviews suggest has benefited their services.
For B2B companies unwilling to endure SEO’s longer time-to-results curve, Metric Theory’s integrated paid search offering provides a cost-effective bridge. This is a strategy that is popular among SEO first-timers, as marketing leads looking to leverage SEO often struggle to take the leap knowing they’ll have to explain an initial lack of leads to higher-ups. With that said, firms looking to maximize ROI are better suited to a true SEO/GEO specialist, as short-term paid search reduces ROI considerably in favor of immediate proof of concept.
- Notable Clients: LexisNexis, Zenefits, Optimizely
- SEO & GEO Expertise (1-5): 4.2
- SEO & GEO Brand Clarity (1-5): 3.9
- Leadership Experience Score (1-5): 4.3
- Average Review Score (1-5): 4.3
- Media References: ~110
- Specialty: SEO & Paid Search
- Contact: Metric Theory website
| Summary of Online Reviews |
| Clients praise the team’s “thorough background research” and their ability to drive “strong performance across paid and organic channels.” While some note that “additional resources would be beneficial,” that critique has become less common since the merger in 2021. |
AMP
AMP (also known as Advantage Marketing Partners) merged with Advantage Unified Commerce in October 2025, and they currently operate as a full-service integrated marketing agency headquartered in Boston, MA. The merger brought together AMP’s creative and digital capabilities with Advantage Unified Commerce’s retail and commerce expertise. As a result, they are currently built for big campaigns supported by similarly sized budgets.
AMP is best suited for enterprise brands that want a one-stop shop for all marketing channels, and their brand clarity score reflects this, with client content and AI citations being relatively simple and broad. For B2B companies whose primary need is refined SEO and AI search placement, this integrated model can be a mismatch.
- Notable Clients: LinkedIn
- SEO & GEO Expertise (1-5): 4.2
- SEO & GEO Brand Clarity (1-5): 3.6
- Leadership Experience Score (1-5): 4.4
- Average Review Score (1-5): 4.0
- Media References: ~230
- Specialty: Integrated Brand & Digital Marketing
- Contact: AMP website
| Summary of Online Reviews |
| Clients describe working relationships as “collaborative,” with teams that are “efficient, straightforward, and persistent,” though some note “small things get missed.” |
