Company lists · Data refreshed September 2026

Top 25 SaaS SEO agencies based in the United States

Name: SaaS 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 6, 2026 4,506 companies tracked

RevenueBase identified 4,506 SaaS SEO agencies headquartered in the United States as of September 2026 and tracks 62,956 professional contacts across them, including 6,511 with verified work emails and 8,397 with mobile numbers. New York is the largest hub.

This list covers SaaS 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 6, 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 6, 2026 86% judged on-target in blind review

4,506Companies

62,956Contacts tracked

6,511Verified emails

8,397Mobile numbers

Explore all 4,506 companies → Free signup · no credit card · 500 free credits

The 25 largest SaaS SEO agencies based in the United States

Ranked by team size

Top 25 of 4,506 SaaS SEO agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. Evidence rates how directly each company's own description names SaaS 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	WEBFXIndirect evidence	Harrisburg, PA, United StatesHQ checked Sep 6, 2026	501-1,000	866
	“We're here to be your digital marketing growth partner in the AI era.” Source: company website · checked Sep 6, 2026
2	SEO INCPartial evidence	Carlsbad, CA, United StatesHQ checked Sep 6, 2026	n/a	825
	“Since its inception in 1997, SEO Inc.” Source: company website · checked Sep 6, 2026
3	Wildnet TechnologiesPartial evidence	New York, NY, United StatesHQ checked Sep 6, 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 6, 2026
4	KPL Tech Solution Pvt. LTDIndirect evidence	Middletown, DE, United StatesHQ checked Sep 6, 2026	201-500	390
	“Do you want to see your business on heights?” Source: company website · checked Sep 6, 2026
5	BoostabilityPartial evidence	Lehi, UT, United StatesHQ checked Sep 6, 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 6, 2026
6	Coalition TechnologiesPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 6, 2026	201-500	320
	“Coalition Technologies is one of the leading SEO & web design agencies in the United States.” Source: company website · checked Sep 6, 2026
7	TSL MarketingStrong evidence	Elkridge, MD, United StatesHQ checked Sep 6, 2026	201-500	253
	“TSL Marketing provides lead generation, SEO, Website, Content, Channel Marketing and HubSpot agency services to MSPs, IT companies, IT Services firms, and SaaS firms.” Source: company website · checked Sep 6, 2026
8	Internet Marketing Inc. NOW REQIndirect evidence	San Diego, CA, United StatesHQ checked Sep 6, 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 6, 2026
9	auroin.comPartial evidence	New York, NY, United StatesHQ checked Sep 6, 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 6, 2026
10	Website Depot Inc. Digital Marketing & SEOIndirect evidence	Los Angeles, CA, United StatesHQ checked Sep 6, 2026	n/a	156
	“Websites Depot Inc.” Source: company website · checked Sep 6, 2026
11	V Digital ServicesIndirect evidence	Phoenix, AZ, United StatesHQ checked Sep 6, 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 6, 2026
12	CloudmellowIndirect evidence	Frisco, TX, United StatesHQ checked Sep 6, 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 6, 2026
13	GO Local InteractivePartial evidence	Overland Park, KS, United StatesHQ checked Sep 6, 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 6, 2026
14	TACOIndirect evidence	New York, NY, United StatesHQ checked Sep 6, 2026	11-50	147
	“Taco builds agentic workflows with search expertise to drive outsized growth outcomes for our customers.” Source: company website · checked Sep 6, 2026
15	MainstreethostIndirect evidence	Amherst, NY, United StatesHQ checked Sep 6, 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 6, 2026
16	RapiddevIndirect evidence	Boston, United StatesHQ checked Sep 6, 2026	51-200	124
	“We help companies turn AI strategy into measurable business outcomes.” Source: company website · checked Sep 6, 2026
17	SEOPPartial evidence	Irvine, CA, United StatesHQ checked Sep 6, 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 6, 2026
18	LSMIndirect evidence	Brentwood, TN, United StatesHQ checked Sep 6, 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 6, 2026
19	TripledartIndirect evidence	Plano, TX, United StatesHQ checked Sep 6, 2026	51-200	117
	“Your GTM engine, fully loaded.” Source: company website · checked Sep 6, 2026
20	Hennessey DigitalPartial evidence	North Hollywood, CA, United StatesHQ checked Sep 6, 2026	51-200	115
	“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: company website · checked Sep 6, 2026
21	1seo Digital AgencyIndirect evidence	Bristol, PA, United StatesHQ checked Sep 6, 2026	51-200	109
	“1SEO Digital Agency is your one-stop shop for success online.” Source: company website · checked Sep 6, 2026
22	Rankfast Search Marketing CompanyPartial evidence	New York, NY, United StatesHQ checked Sep 6, 2026	51-200	109
	“RankFast is a data-driven digital marketing agency dedicated to accelerating growth for Ecommerce, SaaS, Local Businesses, and Enterprises.” Source: company website · checked Sep 6, 2026
23	Straight NorthPartial evidence	Downers Grove, IL, United StatesHQ checked Sep 6, 2026	51-200	105
	“Straight North is an industry-leading digital marketing agency providing SEO, paid advertising, web design/development and creative services since 1997.” Source: company website · checked Sep 6, 2026
24	SeomozPartial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	51-200	105
	“SEOmoz is the world’s most popular provider of SEO software.” Source: company website · checked Sep 6, 2026
25	BIG LeapIndirect evidence	Lehi, UT, United StatesHQ checked Sep 6, 2026	51-200	101
	“Big Leap has been a trusted digital marketing agency since 2008.” Source: company website · checked Sep 6, 2026

Showing 25 of 4,506 SaaS SEO agencies based in the United States

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SaaS SEO agencies based in the United States at a glance

As of Sep 6, 2026

1-10Median size (employees)

New YorkLargest hub · 178 HQs

8,397Contacts with mobile numbers

Sep 6, 2026Data refreshed

Companies by employee count

1-10

3,177

11-50

1,098

51-200

180

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

6,010

31–60

419

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 SaaS 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 “SaaS 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 SaaS 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, 6,511 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 6, 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.

SaaS SEO agencies by metro

Frequently asked

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

RevenueBase identified 4,506 SaaS 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?

WEBFX, headquartered in Harrisburg, tops this list with the largest team on record.

Which city has the most SaaS SEO agencies?

New York leads with 178 headquartered companies, followed by Los Angeles (124) and Houston (87).

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 6,511 verified decision-maker contacts tracked across these 4,506 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 6, 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.