Company lists · Data refreshed September 2026

Top 25 Marketplace SEO agencies based in the United States

Name: Marketplace 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 5, 2026 7,560 companies tracked

RevenueBase identified 7,560 marketplace SEO agencies headquartered in the United States as of September 2026 and tracks 78,393 professional contacts across them, including 10,141 with verified work emails and 13,139 with mobile numbers. New York is the largest hub.

This list covers marketplace 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

7,560Companies

78,393Contacts tracked

10,141Verified emails

13,139Mobile numbers

Unlock all 7,560 companies Free signup · no credit card · 500 free credits

The 25 largest marketplace SEO agencies based in the United States

Ranked by team size

Top 25 of 7,560 marketplace SEO agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names marketplace SEO agencies: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	SEO INCPartial evidence	Carlsbad, CA, United StatesHQ checked Sep 5, 2026	n/a	825
	“Since its inception in 1997, SEO Inc.” Source: company website · checked Sep 5, 2026
2	Wildnet TechnologiesPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	201-500	590
	“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: company website · checked Sep 5, 2026
3	KPL Tech Solution Pvt. LTDIndirect evidence	Middletown, DE, United StatesHQ checked Sep 5, 2026	201-500	390
	“Do you want to see your business on heights?” Source: company website · checked Sep 5, 2026
4	BoostabilityPartial evidence	Lehi, UT, United StatesHQ checked Sep 5, 2026	201-500	326
	“At Boostability, we're more than just an SEO company; we're your strategic partner in driving online growth.” Source: company website · checked Sep 5, 2026
5	Coalition TechnologiesPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 5, 2026	201-500	320
	“Coalition Technologies is one of the leading SEO & web design agencies in the United States.” Source: company website · checked Sep 5, 2026
6	Stan VenturesIndirect evidence	Lake Bluff, IL, United StatesHQ checked Sep 5, 2026	201-500	319
	“We run the link-building operation behind a lot of agencies you've probably heard of.” Source: company website · checked Sep 5, 2026
7	Thrive Internet Marketing AgencyIndirect evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	51-200	232
	“Website: Thrive is a full-service digital marketing agency headquartered in Arlington, Texas.” Source: company website · checked Sep 5, 2026
8	PodeanPartial evidence	New York, United StatesHQ checked Sep 5, 2026	201-500	207
	“Podean is a global, award-winning marketplace marketing agency.” Source: company website · checked Sep 5, 2026
9	Internet Marketing Inc. NOW REQIndirect evidence	San Diego, CA, United StatesHQ checked Sep 5, 2026	51-200	203
	“IMI (now REQ) is a full-service digital marketing agency focused on omnichannel strategies and results.” Source: company website · checked Sep 5, 2026
10	That CompanyIndirect evidence	Leesburg, FL, United StatesHQ checked Sep 5, 2026	n/a	187
	“That Company is a White Label internet marketing firm with over 15 years of experience and a strong customer service core.” Source: company website · checked Sep 5, 2026
11	BIZIQIndirect evidence	Phoenix, AZ, United StatesHQ checked Sep 5, 2026	51-200	184
	“BizIQ: Redefining Digital Marketing Excellence.” Source: company website · checked Sep 5, 2026
12	auroin.comPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	183
	“Incorporated in 2010, AuroIN LLC is a premier digital marketing agency based in World Trade Center, New York, specializing in AI-driven SEO strategies that deliver measurable ROI.” Source: company website · checked Sep 5, 2026
13	V Digital ServicesIndirect evidence	Phoenix, AZ, United StatesHQ checked Sep 5, 2026	201-500	152
	“As one of the fastest-rising digital marketing agencies in the U.S, V Digital Services operates in more than 300 American cities, where we offer premier white-label solutions for…” Source: company website · checked Sep 5, 2026
14	CloudmellowIndirect evidence	Frisco, TX, United StatesHQ checked Sep 5, 2026	51-200	151
	“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: company website · checked Sep 5, 2026
15	GO Local InteractivePartial evidence	Overland Park, KS, United StatesHQ checked Sep 5, 2026	51-200	150
	“Go Local Interactive is a premium digital marketing agency specializing in SEO, PPC, Content, and Web products.” Source: company website · checked Sep 5, 2026
16	GPOIndirect evidence	Austin, TX, United StatesHQ checked Sep 5, 2026	11-50	149
	“GPO is everything search.” Source: company website · checked Sep 5, 2026
17	TACOIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	11-50	147
	“Taco builds agentic workflows with search expertise to drive outsized growth outcomes for our customers.” Source: company website · checked Sep 5, 2026
18	Blushark DigitalIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	51-200	137
	“BluShark Digital LLC was founded on the principle of providing high quality online marketing solutions for companies struggling to stand out online.” Source: company website · checked Sep 5, 2026
19	MOPROIndirect evidence	Newport Beach, CA, United StatesHQ checked Sep 5, 2026	51-200	134
	“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: company website · checked Sep 5, 2026
20	DealeronIndirect evidence	Rockville, MD, United StatesHQ checked Sep 5, 2026	201-500	129
	“DealerOn has been the perfect partner for over dealers across North America.” Source: company website · checked Sep 5, 2026
21	MainstreethostIndirect evidence	Amherst, NY, United StatesHQ checked Sep 5, 2026	51-200	128
	“Mainstreethost specializes in everything you need to have a successful online presence, including search engine optimization, paid search marketing, website design, social media…” Source: company website · checked Sep 5, 2026
22	SEOPPartial evidence	Irvine, CA, United StatesHQ checked Sep 5, 2026	51-200	121
	“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: company website · checked Sep 5, 2026
23	Local SplashPartial evidence	Fountain Valley, CA, United StatesHQ checked Sep 5, 2026	51-200	119
	“Local Splash is the leading local SEO service that specializes in getting our clients high rankings in local search engine results.” Source: company website · checked Sep 5, 2026
24	LSMIndirect evidence	Brentwood, TN, United StatesHQ checked Sep 5, 2026	11-50	118
	“As a Google Premier and Facebook Agency Partner, LSM drives revenue growth for multi-unit businesses through scalable websites, lead generating advertising campaigns…” Source: company website · checked Sep 5, 2026
25	TripledartIndirect evidence	Plano, TX, United StatesHQ checked Sep 5, 2026	51-200	117
	“Your GTM engine, fully loaded.” Source: company website · checked Sep 5, 2026

Showing 25 of 7,560 marketplace SEO agencies based in the United States

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Marketplace SEO agencies based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 300 HQs

13,139Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

5,412

11-50

1,772

51-200

293

201-500

501-1,000

5,001-10,000

10001+

Verified emails by last verification

0–30

9,453

31–60

575

61–90

90–180

180+

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 marketplace SEO agencies, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “marketplace SEO agencies”. Matching reads each company's description, not its industry code or its name.
What we exclude: Companies whose own description does not clearly place them among marketplace 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 an evidence 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, 10,141 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 5, 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.

Marketplace SEO agencies by metro

Frequently asked

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

RevenueBase identified 7,560 marketplace 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 marketplace SEO agencies?

New York leads with 300 headquartered companies, followed by Los Angeles (186) and Houston (148).

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 10,141 verified decision-maker contacts tracked across these 7,560 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 5, 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 SmartSearch, 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.