Company lists · Data refreshed September 2026

Top 25 B2B SEO firms based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 5,083 companies tracked

RevenueBase identified 5,083 B2B SEO firms headquartered in the United States as of September 2026 and tracks 63,110 professional contacts across them, including 6,132 with verified work emails. New York is the largest hub.

This list covers B2B SEO firms 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 21, 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 21, 2026 86% judged on-target in blind review

5,083Companies

63,110Contacts tracked

6,132Verified emails

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The 25 largest B2B SEO firms based in the United States

Ranked by team size

Top 25 of 5,083 B2B SEO firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to B2B SEO firms: 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 21, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 21, 2026
2	Wildnet Technologies	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 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 21, 2026
3	KPL Tech Solution Pvt. LTD	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 21, 2026	201-500	390 contacts →
	Indirect evidence “Do you want to see your business on heights?” Source: RevenueBase Database · checked Sep 21, 2026
4	Boostability	Partial evidence	Lehi, UT, United StatesHQ checked Sep 21, 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 21, 2026
5	Coalition Technologies	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 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 21, 2026
6	Walker Sands	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 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 21, 2026
7	That Company	Indirect evidence	Leesburg, FL, United StatesHQ checked Sep 21, 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 21, 2026
8	Gr0	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	51-200	157 contacts →
	Indirect evidence “At GR0, we are in the business of helping businesses.” Source: RevenueBase Database · checked Sep 21, 2026
9	Brandrep	Partial evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	51-200	152 contacts →
	Partial evidence “Local Marketing Company who specializes in helping small businesses with building and managing their online presence through Local SEO, Lead Generation, Local Directory submission…” Source: RevenueBase Database · checked Sep 21, 2026
10	Blushark Digital	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 2026	51-200	137 contacts →
	Indirect evidence “BluShark Digital LLC was founded on the principle of providing high quality online marketing solutions for companies struggling to stand out online.” Source: RevenueBase Database · checked Sep 21, 2026
11	National Positions	Indirect evidence	Westlake Village, CA, United StatesHQ checked Sep 21, 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 21, 2026
12	MOPRO	Indirect evidence	Newport Beach, CA, United StatesHQ checked Sep 21, 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 21, 2026
13	Mainstreethost	Indirect evidence	Amherst, NY, United StatesHQ checked Sep 21, 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 21, 2026
14	SEOP	Partial evidence	Irvine, CA, United StatesHQ checked Sep 21, 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 21, 2026
15	Local Splash	Partial evidence	Fountain Valley, CA, United StatesHQ checked Sep 21, 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 21, 2026
16	Tripledart	Indirect evidence	Plano, TX, United StatesHQ checked Sep 21, 2026	51-200	117 contacts →
	Indirect evidence “Your GTM engine, fully loaded.” Source: RevenueBase Database · checked Sep 21, 2026
17	Hennessey Digital	Partial evidence	North Hollywood, CA, United StatesHQ checked Sep 21, 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 21, 2026
18	Zoek Marketing	Indirect evidence	Irvine, CA, United StatesHQ checked Sep 21, 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 21, 2026
19	PMP Marketing Group	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 21, 2026	11-50	93 contacts →
	Indirect evidence “For over 20 years, PMP has been the trusted partner for consumer law firms, delivering innovative marketing and website management solutions that drive results.” Source: RevenueBase Database · checked Sep 21, 2026
20	Web20 Ranker	Partial evidence	Harrisburg, PA, United StatesHQ checked Sep 21, 2026	51-200	92 contacts →
	Partial evidence “Helping marketing agencies scale with our superior white label SEO service since 2015.” Source: RevenueBase Database · checked Sep 21, 2026
21	Digital Resource	Indirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 21, 2026	51-200	90 contacts →
	Indirect evidence “Digital Resource is a full-service internet marketing agency based in South Florida.” Source: RevenueBase Database · checked Sep 21, 2026
22	Direct Online Marketing	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 21, 2026	11-50	89 contacts →
	Indirect evidence “Direct Online Marketing (DOM) is a digital marketing agency and Top 1% Premier Google Partner that has been helping businesses grow confidently online since 2006.” Source: RevenueBase Database · checked Sep 21, 2026
23	Seoprofy	Partial evidence	Orlando, FL, United StatesHQ checked Sep 21, 2026	51-200	89 contacts →
	Partial evidence “SeoProfy is your strategic SEO and AI visibility partner for organic and AI visibility that brings real ROI.” Source: RevenueBase Database · checked Sep 21, 2026
24	Paper Street Media	Indirect evidence	Miami, FL, United StatesHQ checked Sep 21, 2026	11-50	88 contacts →
	Indirect evidence “With more than a decade of experience Paper Street Media can help you leverage manpower and increase your capacity for marketing and web design projects.” Source: RevenueBase Database · checked Sep 21, 2026
25	Npaccel	Indirect evidence	Lehi, UT, United StatesHQ checked Sep 21, 2026	51-200	85 contacts →
	Indirect evidence “We are NPAccel, a curious, value-driven company that loves to create excitement, engage and inspire others with our vision.” Source: RevenueBase Database · checked Sep 21, 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 firms. 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 firms.
Partial evidence: Its own public description names part of B2B SEO firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B SEO firms. 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 5,083 B2B SEO firms based in the United States

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B2B SEO firms based in the United States at a glance

As of Sep 21, 2026

9.7%Verified-email coverage

12.4Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

3,722

11-50

1,128

51-200

178

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 5,083 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 firms, 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 firms”. 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 firms), 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 firms, 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, 6,132 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 21, 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 firms 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 firms, 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 firms are there based in the United States?

RevenueBase identified 5,083 B2B SEO firms 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 firms?

New York leads with 188 headquartered companies, followed by Los Angeles (130) and Houston (97).

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 6,132 verified decision-maker contacts tracked across these 5,083 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 21, 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.