The Top SEO Companies in the U.S. in 2026

Last Updated: May 5, 2026

SEO is a wide field, and SEO companies range from 1–5 person teams that focus on technical updates to generalist digital marketing firms that don’t truly specialize in SEO. In today’s changing search environment, where SEO and Generative AI Optimization are equally necessary, it’s critical to find a firm that knows what they’re doing and has the resources necessary to support your company’s organic growth.

To help businesses choose a reliable agency, our team conducted a meta-analysis of SEO agencies’ online reviews in order to produce an overall average. We included reviews from Clutch, G2, Upcity, Capterra, and Google in our dataset, weighting “pure” review sites that do not solicit payment from agencies for inclusion over those with a more commercial focus.

In our analysis, we also looked at each agency’s median employee tenure and whether or not their founders are still actively involved in leading day-to-day operations, as both employee and founder departures can lead to a decline in service quality as institutional knowledge is lost. In our recent updates, we also placed significantly more emphasis on generative engine optimization (GEO) expertise due to the increasing adoption of AI search.

Finally, because SEO is such a wide field, we’ve separated our list into 10 different niches. We weigh each of these factors as follows:

• Average Review Score: 20%
• Leadership Experience: 12.5%
• Founder Led Status: 12.5%
• Median Employee Tenure: 15%
• AI Visibility Score: 15%
• Year Established: 10%
• Media References: 10%
• GEO Offering: 5%

We’ve chosen to list only the top SEO companies in the US that have a laser focus on their particular niche of SEO rather than simply creating a list of the top digital marketing companies that happen to offer SEO.

The Top SEO Companies in the US – 2026

	Company	Established	Founder Led	Leadership Experience Score	Average Review Score	Median Employee Tenure	AI Visibility Score	Media References	Offers GEO?	Specialty
1	First Page Sage	2009	Yes	4.9	4.8	4.3 years	4.8	~600	Yes	Lead generation-focused SEO, Generative Engine Optimization (GEO)
2	Duffy Agency	2009	Yes	4.8	4.6	No data	4.4	~100	No	International SEO, multilingual content marketing
3	Boostability	2009	Yes	4.8	4.7	5 years	4.2	~250	No	White label SEO for Digital Marketing Agencies
4	LocaliQ	2003	No	4.3	4.2	3.5 years	4.0	~1,100	No	Local SEO, Google Business Profile optimization
5	Epsilon	1969	No	4.8	4.2	4.6 years	4.2	~2,000	No	Enterprise digital marketing, traditional marketing
6	Seller Interactive	2012	Yes	4.4	4.3	1.9 years	3.8	~75	No	Amazon SEO & account management for Amazon eCommerce companies
7	Aumcore	2010	No	4.2	4.5	1.5 years	4.4	~190	No	Voice and mobile search SEO
8	Clay Agency	2016	Yes	4.5	4.6	2.8 years	4.1	~300	No	Conversion rate optimization for SEO, UI/UX design, web design
9	Marketing Eye	2004	Yes	4.1	4.1	7 years	3.9	~50	No	Technical SEO, web design
10	Community Boost	2012	Yes	4.1	4.0	1.9 years	4.5	~75	No	Nonprofit SEO

For Lead Generation-focused SEO – First Page Sage

First Page Sage is the top SEO firm in the US, having focused their expertise purely on SEO and its AI search cousin GEO, as opposed to the more typical agency trajectory of expanding horizontally into other marketing services. The fact that they were the first agency to offer Generative Engine Optimization services speaks to the firm’s commitment to staying at the forefront of organic marketing. Their exploration and refinement of emerging marketing fields is driven by their CEO, Evan Bailyn, who is regarded as the founder of the GEO marketing discipline.

First Page Sage’s approach focuses on ranking for keywords and queries that indicate a searcher is actively looking for products or services, creating a flow of qualified leads for their clients. This approach stands in contrast to most other agencies we analyzed, who place a greater focus on ranking for general research keywords with moderately higher search volume but significantly lower conversion. The majority of First Page Sage’s clients are in B2B industries such as SaaS, IT, and manufacturing, with clients including Microsoft, US Bank, SoFi, and Logitech; however, they also work with a number of large B2C businesses such as Chanel, Nerdwallet, and Wix.

Location: San Francisco, CA
Established: 2009
Price Range: $$$
Average Review Score: 4.8
Services: SEO, Lead Generation, GEO / AEO

Summary of Online Reviews

First Page Sage prioritizes “better original content than anyone else” and “thoughtful strategic planning” which leads to “provable lead generation and ROI”; but their results require “an in-depth onboarding period” that can take longer than that of firms that focus on paid marketing.

For Multilingual SEO – Duffy Agency

Multilingual SEO is a difficult practice: as if translation weren’t enough of a nuanced process, when you add keyword strategy and deciphering search intent to the mix, it becomes even more complex. Duffy agency has been successful at doing all that, including in a few more technical markets where an understanding of specialized jargon matters.

Duffy specializes in providing SEO, online marketing, and social media marketing services to companies who have brands with international reach. They’ve worked with clients in fields ranging from Consumer Foods to Medical Services, and their past clients include Napapijri, Cavidi, and the United Nations World Food Programme.

Location: Dover, NH
Established: 2009
Price Range: $$$$
Average Review Score: 4.6
Services: International SEO, Strategic Consulting, Online Brand Management

Summary of Online Reviews

Duffy Agency services are “ambitious“, but manage to find success “without increasing campaign cost“. Their results are often “quite good“, but must “build over a longer period of time“.

For White Label SEO – Boostability

Due to SEO’s demanding nature and the specialized skillset required, digital marketing agencies often find themselves in need of additional support to help manage clients’ SEO campaigns. Many SEO agencies are happy to act as a white-label partner, but few make it their specialty. Boostability is the top SEO firm in our study that specializes in providing white-label services to other marketing agencies, partnering with agencies that don’t have the resources to offer SEO on their own.

Boostability has also worked directly with small businesses. They offer low-cost packages that are designed specifically for companies that are just getting started, are in low-competition markets, and are not yet ready to post blog content regularly. They also provide solutions for scaling businesses, so they can grow with their clients. Clients of Boostability include Bloom Studios, KIARO, and Peterson Family Orthodontics.

Location: Lehi, UT
Established: 2009
Price Range: $
Average Review Score: 4.7
Services: White Label SEO, Small Business SEO, Web Design

Summary of Online Reviews

Boostability is “professional and knowledgeable“; their representatives are “eager to help” and “responsive” but they suffer from “too much account manager turnover“.

For Local SEO – LocaliQ

Not all companies need to compete nationally. A construction firm based in a single city, for instance, will gain nothing from being seen by searchers nationwide. Instead, they can focus all their efforts on geotargeted keywords that are lower in competition and much more likely to lead to a sale.

LocaliQ (formerly ReachLocal) is the top SEO agency with a focus on increasing local search visibility. They specialize in working with inherently location-bound companies in industries such as real estate, home services, and automotive sales and service, and their clients have included TGM Associates, Mr. Rooter, and Central Washington University.

Location: Woodland Hills, CA
Established: 2003
Price Range: $$
Average Review Score: 4.2
Services Offered: Local SEO, PPC Marketing, Marketing Automation

Summary of Online Reviews

LocaliQ is a “great asset” to its clients, offering “exceptional web design” and digital media services. Some former clients report “missed deadlines” and poorly optimized PPC campaigns, however.

For Amazon SEO – Seller Interactive

Google accounts for over 90% of all general search engine traffic, which is why nearly all SEO agencies dedicate themselves to understanding the nuances of Google’s algorithm. But for many B2C eCommerce companies, making it to the top of Amazon’s search results is just as important as reaching the first page of Google. It requires a partner that understands not just Amazon’s search algorithm, but can also help manage their clients’ Amazon marketplace and listings.

As of 2023, Seller Interactive is the leading Amazon-focused SEO agency in the US. They’ve been helping businesses manage their AMS accounts since 2012, and have had particular success partnering with companies in the consumer technology, food &  beverage, and cosmetics industries.

Location: Markham, Ontario
Established: 2012
Price Range: $$
Average Review Score: 4.4
Services Offered: Amazon SEO, Amazon Account Management, Demand-Side Platform Advertising (DSP)

Summary of Online Reviews

Seller Interactive is “knowledgeable of Amazon processes” and their clients are “impressed with the quality of their work“, which tends to “exceed expectations” even if “communication can sometimes be difficult“.

For Full-Service Enterprise Digital Marketing – Epsilon

Enterprises not only need to ensure that their marketing partner is familiar with enterprise-specific SEO strategies, but, because of their size and entrenched processes, often find they need a single agency to handle all their digital marketing. Attempting to contract with multiple agencies often delays internal enterprise purchasing processes, which can result in lower ROI and poorly coordinated marketing pushes.

Epsilon combines SEO, personalized messaging, and customer data platforms to give enterprises a single-provider option for all of their digital marketing needs. They’re particularly successful in their work with global consumer brands, and their past clients include Walgreens, Coach, and Volvo.

Location: Irving, TX
Established: 1969
Price Range: $$$
Average Review Score: 4.2
Services Offered: Digital Media, Data Solutions, Customer Insights

Summary of Online Reviews

Epsilon is “responsive to feedback” and provides “attentive project oversight” for its clients, but its services “are very costly.”

For Technical SEO – Marketing Eye

Not all businesses need an SEO agency to write top-tier content for them. If producing content is already a core part of their business model, they should look to their SEO agency to provide conversion-optimized website design, technical SEO, and strategy.

Marketing Eye offers a broad range of marketing services, but its strength is in its technical and strategic consulting. Their 15 years of experience have seen them work with clients across consumer goods, logistics, and financial services, including Botani, Star Source Pty. Ltd., and Mint Money.

Location: Atlanta, GA
Established: 2004
Price Range: $$
Average Review Score: 4.1
Services Offered: Marketing Automation, Marketing Consulting, Web Development

Summary of Online Reviews

Clients report that Marketing Eye  is “competent and professional” with “superior” service offerings, but employees report needing “additional training.”

For Conversion Rate Optimization – Clay Agency

Conversion rate optimization is a difficult skill to find in an agency; while many companies mention it on their website, few treat it as an art. Because CRO combines web design, UI/UX design, and analytics, an SEO agency that is strong in this area will naturally have dedicated UI/UX and analytics experts on staff.

Clay Agency focuses squarely on digital strategy and UI/UX design, making them a good fit for clients whose primary SEO need is improving conversion rates from organic visitors. Their service involves considerable online research and detailed UI/UX audits.

Location: San Francisco, CA
Established: 2016
Price Range: $$$
Average Review Score: 4.6
Services Offered: UI/UX Design, Product and Brand Strategy

Summary of Online Reviews

Delivering “top-notch quality” at a “competitive price“, Clay Agency pays “close attention to detail” and provides “high-quality design.”

For Voice Search Optimization – Aumcore

Second only to AI-based search, voice search is the newest SEO niche, and is growing in importance as users begin to rely more and more on Siri, Alexa, and Google Voice Search. This user segment is particularly important for B2C companies, as the natural language processing technologies used in those assistants are currently optimized for everyday, non-technical speech. Aumcore includes Voice SEO as one of their core services, and understands that keyword targeting strategies are fundamentally different for spoken and typed language.

More important than this new niche, however, is mobile search. Google has officially completed their transition to mobile-first indexing, and over half of all web traffic is accessed from mobile devices. Prioritizing mobile users is especially important for B2C companies, as consumers are more likely to browse on their phones than professional users. Aumcore has experience working with both types of businesses, and its clients have included Comodo Cybersecurity, eviCore, and Delonghi.

Headquarters: New York, NY
Established: 2010
Price Range: $$
Average Review Score: 4.7
Services Offered: Voice Search Optimization, Social Media, Brand Strategy

Summary of Online Reviews

Aumcore’s work is “excellent“,  and they boast a “well-rounded and responsive team“.

For Nonprofits & Charities – Community Boost

Nonprofits and charitable organizations can benefit just as much from SEO as for-profit businesses. The inherent trust that searchers place in organic search results is just as, if not more, important for nonprofits seeking donations from difficult-to-reach high-net-worth individuals and sponsors.

As this is a smaller niche, SEO companies in this category are relatively rare, and the best we’ve found is Community Boost. While Community Boost offers a suite of digital marketing services, SEO is one of their core services.

Headquarters: San Diego, CA
Established: 2012
Price Range: $$
Average Review Score: 4.6
Services Offered: Nonprofit SEO, Youtube & Display Ads, Google Ad Grant Management

Summary of Online Reviews

Community Boost is “dedicated to their craft” and is an “incredible partner” for nonprofits, but still has “small tweaks to iron out“.

The Top SEO Agencies in the US by Industry

Our team also ranked the top US SEO agencies by industry specialty. In doing so, we considered average review score, notable clients, # of employees, and the quality of the firm’s leadership team. We were able to compile data in the following 6 industries:

• SaaS
• Healthcare
• Real Estate
• Financial
• Home Services
• Manufacturing