Company lists · Data refreshed September 2026

Top 25 B2B SEO agencies based in the United States

Name: B2B SEO agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 14, 2026 5,443 companies tracked

RevenueBase identified 5,443 B2B SEO agencies headquartered in the United States as of September 2026 and tracks 68,070 professional contacts across them, including 7,581 with verified work emails. New York is the largest hub.

This list covers B2B SEO agencies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 14, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 14, 2026 86% judged on-target in blind review

5,443Companies

68,070Contacts tracked

7,581Verified emails

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The 25 largest B2B SEO agencies based in the United States

Ranked by team size

Top 25 of 5,443 B2B SEO agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 14, 2026. RevenueBase Smart Search rates how each company's information relates to B2B SEO agencies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	SEO INC	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 14, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 14, 2026
2	Multiview	Partial evidence	Irving, TX, United StatesHQ checked Sep 14, 2026	501-1,000	616 contacts →
	Partial evidence “Multiview is a B2B digital marketing agency helping associations and businesses reach, engage and grow their most valued relationships.” Source: RevenueBase Database · checked Sep 14, 2026
3	Wildnet Technologies	Partial evidence	New York, NY, United StatesHQ checked Sep 14, 2026	201-500	590 contacts →
	Partial evidence “Wildnet Technologies - Best Digital Marketing Agency \| White Label Services for Growing Agencies \| Results-Driven AI SEO Services We don't just run campaigns-we build growth…” Source: RevenueBase Database · checked Sep 14, 2026
4	KPL Tech Solution Pvt. LTD	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 14, 2026	201-500	390 contacts →
	Indirect evidence “Do you want to see your business on heights?” Source: RevenueBase Database · checked Sep 14, 2026
5	Boostability	Partial evidence	Lehi, UT, United StatesHQ checked Sep 14, 2026	201-500	326 contacts →
	Partial evidence “At Boostability, we're more than just an SEO company; we're your strategic partner in driving online growth.” Source: RevenueBase Database · checked Sep 14, 2026
6	Coalition Technologies	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	201-500	320 contacts →
	Partial evidence “Coalition Technologies is one of the leading SEO & web design agencies in the United States.” Source: RevenueBase Database · checked Sep 14, 2026
7	Stan Ventures	Indirect evidence	Lake Bluff, IL, United StatesHQ checked Sep 14, 2026	201-500	319 contacts →
	Indirect evidence “We run the link-building operation behind a lot of agencies you've probably heard of.” Source: RevenueBase Database · checked Sep 14, 2026
8	Marketing Works	Partial evidence	Worthington, OH, United StatesHQ checked Sep 14, 2026	n/a	290 contacts →
	Partial evidence “An integrated B2B agency of strategists and execution specialists, Marketing Works is outcomes driven, strategy focused and values-based.” Source: RevenueBase Database · checked Sep 14, 2026
9	Walker Sands	Partial evidence	Chicago, IL, United StatesHQ checked Sep 14, 2026	201-500	199 contacts →
	Partial evidence “Walker Sands is an integrated B2B growth services agency with expertise in strategy, data, content, creative, strategic communications, digital marketing and RevOps.” Source: RevenueBase Database · checked Sep 14, 2026
10	That Company	Indirect evidence	Leesburg, FL, United StatesHQ checked Sep 14, 2026	n/a	187 contacts →
	Indirect evidence “That Company is a White Label internet marketing firm with over 15 years of experience and a strong customer service core.” Source: RevenueBase Database · checked Sep 14, 2026
11	Gr0	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 14, 2026	51-200	157 contacts →
	Indirect evidence “At GR0, we are in the business of helping businesses.” Source: RevenueBase Database · checked Sep 14, 2026
12	Cloudmellow	Indirect evidence	Frisco, TX, United StatesHQ checked Sep 14, 2026	51-200	151 contacts →
	Indirect evidence “CloudMellow is a tech-driven, full-scale digital marketing agency with a proven track record in transforming businesses across the globe through thoughtful and innovative…” Source: RevenueBase Database · checked Sep 14, 2026
13	TACO	Indirect evidence	New York, NY, United StatesHQ checked Sep 14, 2026	11-50	147 contacts →
	Indirect evidence “Taco builds agentic workflows with search expertise to drive outsized growth outcomes for our customers.” Source: RevenueBase Database · checked Sep 14, 2026
14	Almoh Media	Partial evidence	Chicago, IL, United StatesHQ checked Sep 14, 2026	51-200	140 contacts →
	Partial evidence “We are Almoh Media, a fully integrated B2B marketing agency specializing in lead generation, account-based marketing, demand generation, digital marketing, account management, and…” Source: RevenueBase Database · checked Sep 14, 2026
15	National Positions	Indirect evidence	Westlake Village, CA, United StatesHQ checked Sep 14, 2026	51-200	137 contacts →
	Indirect evidence “National Positions, The Digital Growth Agency, is a 360-degree digital marketing firm located in Southern California.” Source: RevenueBase Database · checked Sep 14, 2026
16	MOPRO	Indirect evidence	Newport Beach, CA, United StatesHQ checked Sep 14, 2026	51-200	134 contacts →
	Indirect evidence “Mopro gives small businesses a website designed to convert, and the A.I-powered tools they need to claim a top spot in search results and win more customers.” Source: RevenueBase Database · checked Sep 14, 2026
17	Mainstreethost	Indirect evidence	Amherst, NY, United StatesHQ checked Sep 14, 2026	51-200	128 contacts →
	Indirect evidence “Mainstreethost specializes in everything you need to have a successful online presence, including search engine optimization, paid search marketing, website design, social media…” Source: RevenueBase Database · checked Sep 14, 2026
18	SEOP	Partial evidence	Irvine, CA, United StatesHQ checked Sep 14, 2026	51-200	121 contacts →
	Partial evidence “SEOP is one of the leaders in the Search Engine Optimization industry and was co-founded by SEO experts that thrive on a combination of in-depth expertise and creative, forward…” Source: RevenueBase Database · checked Sep 14, 2026
19	Local Splash	Partial evidence	Fountain Valley, CA, United StatesHQ checked Sep 14, 2026	51-200	119 contacts →
	Partial evidence “Local Splash is the leading local SEO service that specializes in getting our clients high rankings in local search engine results.” Source: RevenueBase Database · checked Sep 14, 2026
20	Tripledart	Indirect evidence	Plano, TX, United StatesHQ checked Sep 14, 2026	51-200	117 contacts →
	Indirect evidence “Your GTM engine, fully loaded.” Source: RevenueBase Database · checked Sep 14, 2026
21	Hennessey Digital	Partial evidence	North Hollywood, CA, United StatesHQ checked Sep 14, 2026	51-200	115 contacts →
	Partial evidence “Named to Fortune’s 50 Best Workplaces in Advertising & Marketing, Hennessey Digital is an award-winning digital marketing agency specializing in SEO for lawyers and other online…” Source: RevenueBase Database · checked Sep 14, 2026
22	Zoek Marketing	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 14, 2026	201-500	108 contacts →
	Indirect evidence “As a business owner there are not many things that make you want to pull your hair out as much as figuring out how to gain new customers, phone calls, and visitors to your website.” Source: RevenueBase Database · checked Sep 14, 2026
23	Straight North	Partial evidence	Downers Grove, IL, United StatesHQ checked Sep 14, 2026	51-200	105 contacts →
	Partial evidence “Straight North is an industry-leading digital marketing agency providing SEO, paid advertising, web design/development and creative services since 1997.” Source: RevenueBase Database · checked Sep 14, 2026
24	Godfrey	Partial evidence	Lancaster, PA, United StatesHQ checked Sep 14, 2026	51-200	103 contacts →
	Partial evidence “We’re a full-service B2B marketing agency, and we love working with companies that make stuff-really complex stuff like machinery, components and chemicals.” Source: RevenueBase Database · checked Sep 14, 2026
25	The MX Group	Partial evidence	Burr Ridge, IL, United StatesHQ checked Sep 14, 2026	51-200	97 contacts →
	Partial evidence “MX is the 2nd largest independent, integrated B2B marketing agency in the U.S.” Source: RevenueBase Database · checked Sep 14, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: B2B SEO agencies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names B2B SEO agencies.
Partial evidence: Its own public description names part of B2B SEO agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B SEO agencies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 5,443 B2B SEO agencies based in the United States

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B2B SEO agencies based in the United States at a glance

As of Sep 14, 2026

11.1%Verified-email coverage

12.5Average contacts per company

1-10Median size (employees)

3.8%Largest-city concentration · New York

Sep 14, 2026Page data refreshed

Companies by employee count

1-10

3,931

11-50

1,251

51-200

198

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 5,443 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among B2B SEO agencies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “B2B SEO agencies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names B2B SEO agencies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among B2B SEO agencies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 7,581 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 14, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

B2B SEO agencies by metro

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names B2B SEO agencies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many B2B SEO agencies are there based in the United States?

RevenueBase identified 5,443 B2B SEO agencies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

SEO INC, headquartered in Carlsbad, tops this list with the largest team on record.

Which city has the most B2B SEO agencies?

New York leads with 206 headquartered companies, followed by Los Angeles (136) and Houston (105).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 7,581 verified decision-maker contacts tracked across these 5,443 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 14, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.