Company lists · Data refreshed September 2026

Top 25 International SEO agencies based in the United States

Name: International 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 4, 2026 1,671 companies tracked

RevenueBase identified 1,671 international SEO agencies headquartered in the United States as of September 2026 and tracks 11,813 professional contacts across them, including 2,219 with verified work emails and 2,179 with mobile numbers. New York is the largest hub.

This list covers international 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 4, 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 4, 2026 86% judged on-target in blind review

1,671Companies

11,813Contacts tracked

2,219Verified emails

2,179Mobile numbers

Unlock all 1,671 companies Free signup · no credit card · 500 free credits

The 25 largest international SEO agencies based in the United States

Ranked by team size

Top 25 of 1,671 international SEO agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names international 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 4, 2026	n/a	825
	“Since its inception in 1997, SEO Inc.” Source: company website · checked Sep 4, 2026
2	Wildnet TechnologiesPartial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	201-500	609
	“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 4, 2026
3	KPL Tech Solution Pvt. LTDIndirect evidence	Middletown, DE, United StatesHQ checked Sep 4, 2026	201-500	390
	“Do you want to see your business on heights?” Source: company website · checked Sep 4, 2026
4	BoostabilityPartial evidence	Lehi, UT, United StatesHQ checked Sep 4, 2026	201-500	330
	“At Boostability, we're more than just an SEO company; we're your strategic partner in driving online growth.” Source: company website · checked Sep 4, 2026
5	Coalition TechnologiesPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 4, 2026	201-500	320
	“Coalition Technologies is one of the leading SEO & web design agencies in the United States.” Source: company website · checked Sep 4, 2026
6	SEOPPartial evidence	Irvine, CA, United StatesHQ checked Sep 4, 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 4, 2026
7	Siege MediaPartial evidence	Austin, CA, United StatesHQ checked Sep 4, 2026	51-200	111
	“We help growing brands scale with SEO, GEO, content marketing and PR.” Source: company website · checked Sep 4, 2026
8	Direct Online MarketingIndirect evidence	Pittsburgh, WV, United StatesHQ checked Sep 4, 2026	11-50	91
	“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: company website · checked Sep 4, 2026
9	SeoprofyPartial evidence	Orlando, FL, United StatesHQ checked Sep 4, 2026	51-200	88
	“SeoProfy is your strategic SEO and AI visibility partner for organic and AI visibility that brings real ROI.” Source: company website · checked Sep 4, 2026
10	Digital ResourceIndirect evidence	West Palm Beach, FL, United StatesHQ checked Sep 4, 2026	51-200	87
	“Digital Resource is a full-service internet marketing agency based in South Florida.” Source: company website · checked Sep 4, 2026
11	Paper Street MediaIndirect evidence	Miami, FL, United StatesHQ checked Sep 4, 2026	11-50	87
	“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: company website · checked Sep 4, 2026
12	Fuel Online Digital Marketing Agency - SEO CompanyIndirect evidence	Boston, NY, United StatesHQ checked Sep 4, 2026	51-200	79
	“Fuel Online is the definitive global authority in Generative Engine Optimization (GEO) and high-performance search strategy.” Source: company website · checked Sep 4, 2026
13	VictoriousIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	51-200	76
	“Victorious is a San Francisco search agency.” Source: company website · checked Sep 4, 2026
14	PrevisiblePartial evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	11-50	73
	“Previsible empowers businesses with actionable SEO consulting, content marketing and development designed to drive impactful results.” Source: company website · checked Sep 4, 2026
15	WebimaxIndirect evidence	Marlton, NJ, United StatesHQ checked Sep 4, 2026	11-50	58
	“WebiMax was founded on CEO Kenneth Wisnefski’s core principle of truly helping clients as more of a strategic partner than merely an outsourced vendor.” Source: company website · checked Sep 4, 2026
16	180 MarketingIndirect evidence	Bend, OR, United StatesHQ checked Sep 4, 2026	11-50	53
	“180 Marketing has helped large and small online retailers increase revenues through effective search engine optimization campaigns utilizing specialized, proprietary methodologies.” Source: company website · checked Sep 4, 2026
17	Page ONE PowerPartial evidence	Boise, ID, United StatesHQ checked Sep 4, 2026	51-200	46
	“Page One Power is an SEO agency specialized in strategic content creation and sustainable link building.” Source: company website · checked Sep 4, 2026
18	USERPPartial evidence	Denver, CO, United StatesHQ checked Sep 4, 2026	51-200	41
	“uSERP is an SEO agency for high-growth and enterprise brands.” Source: company website · checked Sep 4, 2026
19	VizisitesIndirect evidence	Escondido, CA, United StatesHQ checked Sep 4, 2026	11-50	40
	“ViziSites is a your one-stop shop for all things digital marketing.” Source: company website · checked Sep 4, 2026
20	Adler LocalIndirect evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 4, 2026	51-200	38
	“Adler Local is a trusted leader in local search optimization.” Source: company website · checked Sep 4, 2026
21	ObilityIndirect evidence	Portland, TX, United StatesHQ checked Sep 4, 2026	51-200	36
	“Obility provides individualized B2B internet marketing solutions that work.” Source: company website · checked Sep 4, 2026
22	WytlabsPartial evidence	San Jose, CA, United StatesHQ checked Sep 4, 2026	11-50	33
	“Our SEO processes cuts through the noise and delivers what you really need to grow more targeted traffic and potential leads.” Source: company website · checked Sep 4, 2026
23	51blocksIndirect evidence	Denver, CO, United StatesHQ checked Sep 4, 2026	11-50	33
	“51Blocks offers small businesses and website owners unique solutions with a local friendly service.” Source: company website · checked Sep 4, 2026
24	Sharpnet Solutions, INCIndirect evidence	Fort Collins, CO, United StatesHQ checked Sep 4, 2026	11-50	32
	“SharpNet Solutions was founded by Chris W.” Source: company website · checked Sep 4, 2026
25	DOT COM MediaPartial evidence	Thousand Oaks, CA, United StatesHQ checked Sep 4, 2026	11-50	32
	“DCM Mogul specializes in organic SEO and website marketing.” Source: company website · checked Sep 4, 2026

Showing 25 of 1,671 international SEO agencies based in the United States

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International SEO agencies based in the United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 80 HQs

2,179Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

1,162

11-50

405

51-200

201-500

501-1,000

Verified emails by last verification

0–30

31–60

176

61–90

1,131

90–180

888

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 international 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 “international 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 international 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, 2,219 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 4, 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.

International SEO agencies by metro

International SEO agencies in New York80
International SEO agencies in Los Angeles55
International SEO agencies in Houston33
International SEO agencies in San Diego30
International SEO agencies in Dallas29
International SEO agencies in San Francisco29
International SEO agencies in Austin27

Frequently asked

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

RevenueBase identified 1,671 international 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 international SEO agencies?

New York leads with 80 headquartered companies, followed by Los Angeles (55) and Houston (33).

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 2,219 verified decision-maker contacts tracked across these 1,671 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 4, 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.