Discover the top SEO agencies in United States. Compare services, reviews, and find the perfect agency for your business.
Lyndhurst, United States
Based in Lyndhurst, New Jersey, Open and Free Software Solutions LLC operates under the name Digital Marketing New Jersey and works with businesses a…
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Costa Mesa, United States
Based in Costa Mesa, California, Open Interactive Inc. has operated since 2003, working with businesses of varying sizes across both national and loc…
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Huntington, United States
A performance marketing agency with roots in Huntington, New York and an office in Austin, Texas, OpenMoves works with businesses seeking measurable…
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Langhorne, United States
Based in Langhorne, Pennsylvania, this small team of one to ten people works with small and medium-sized businesses, combining marketing and technolo…
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Foxborough, United States
Based in Foxboro, Massachusetts, OpenVine Web Solutions works with small businesses across the United States and Canada. The agency is led by founder…
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New York, United States
Openwave Computing is based in New York and works with businesses across industries such as ecommerce, government, education, healthcare, manufacturi…
View ProfileUnited States
Operatio Marketing specializes in delivering effective digital marketing solutions tailored to your business needs. With a focus on enhancing online…
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Fargo, United States
Based in Fargo, North Dakota, with an additional presence in Denver, Colorado, OpGo Marketing works with small businesses across the United States, i…
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Arvada, United States
Based in Arvada, Colorado, Opie Productions has been building websites for Colorado businesses out of the Denver metro area since 2009. The agency wo…
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Salt Lake City, United States
Opkie is a diagnostic marketing consultancy based in Salt Lake City that works exclusively with independent dental and orthodontic practices. Rather…
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Houston, United States
Based in Houston, Texas, Opolis Marketing is a small team, sized between one and ten people, working with local and regional businesses that need a f…
View ProfileNew York, United States
Based in New York City, OpoSols Digital Marketing Agency works with a range of business sizes, from small operations to medium and large companies, a…
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Columbus, United States
Based in Columbus, Ohio, OppGen Marketing has operated since 2010, working with brands across the United States rather than a single regional market.…
View ProfilePortland, United States
Oppold Creative is a Portland-based digital marketing agency specialized in delivering innovative and tailored marketing solutions that resonate with…
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North Miami, United States
Based in North Miami, Florida, OptFirst Internet Marketing is a small digital marketing team offering integrated online marketing strategies designed…
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Winfield, United States
Optic Cell Media, based in Winfield, Illinois, is a small agency focused on local and small businesses looking to build and grow their online presenc…
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Tampa, United States
Based in Tampa, Florida, with an additional studio in The Woodlands, Texas, Optic Marketing Group is a small digital marketing team (1-10 people) tha…
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Appleton, United States
Based in Appleton, Wisconsin, this small agency (team of 1-10) has been operating since 2011, working with ecommerce, SaaS, and lead-generation busin…
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Harrison, United States
Based in Harrison, New York, Optimize Digital works with professional firms, healthcare practices, medical-adjacent companies, and established local…
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Phoenix, United States
Based in Phoenix, Arizona, Optimize Locale is a small digital marketing agency focused on local service businesses such as pet care providers, veteri…
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The complete migration playbook: what to freeze before launch, how to build a redirect map that actually holds, what to test on the staging site, and how to read the first eight weeks after go-live.
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How B2B search really works: bottom-of-funnel pages before blog volume, comparison and alternatives content, product-led assets, and attribution that survives a six-month cycle.
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This directory lists 13,527 agencies in United States, spread across 2,422 cities. 12,030 of them publish a direct contact (email or phone). The best-represented cities are New York (330), San Francisco (315), Los Angeles (299).
| Team size | United States | What it means |
|---|---|---|
| 1-10 | 10,059 (74%) | One contact, often the founder. Responsive, limited capacity. |
| 11-50 | 1,711 (13%) | Specialists per discipline. The most common trade-off. |
| 51-200 | 29 (0%) | Several teams, formal process, higher budgets. |
| 200+ | 129 (1%) | International structure, enterprise accounts. |
Across the 13,527 agencies in this country: SEO (97%), Web Design (66%), Social Media (51%), SEA/PPC (51%), Web Development (40%), Content Marketing (37%). SEO leads with 13,148 agencies.
Stated engagement floors in United States range from $1,000+ to $100,000+. The most common is $1,000+ (2,787 agencies). That figure is an entry floor, not a price: it says what size of engagement the agency will take on, which stays the fastest filter for ruling out the ones that do not match your scale.
The 13,527 agencies on this page are ordered by how complete their listing is, not by payment: nobody buys a position here. The information comes from each agency's own website, checked as live. An agency can claim its listing to correct or complete it.
Should you pick an agency based in United States? Proximity matters most for local SEO and the language your content is written in. Here, English and Spanish are the most declared working languages. For an international site, where the agency sits matters less than its experience in your market.
Small or large agency? 74% of agencies here have fewer than ten people, against 158 above fifty. A small team means direct access to the people doing the work; a large one absorbs heavier programmes without depending on one person.
What to check before signing? Ask for measured results on a site comparable to yours, who actually does the work, and what happens when the contract ends: deliverables and access must stay yours. An agency that will not show its method is selling a black box.
