Company lists · Data refreshed November 2026

Top 25 Localization SEO services based in the United States

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

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 3,465 companies tracked

RevenueBase identified 3,465 company matches for localization SEO services associated with the United States as of November 2026 and tracks 59,681 professional contacts across them, including 5,228 with verified work emails. New York is the largest hub.

This list covers company matches for localization SEO services associated with the United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

3,465Companies

59,681Contacts tracked

5,228Verified emails

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The 25 largest localization SEO services based in the United States

Ranked by team size

Top 25 of 3,465 company matches for localization SEO services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Welocalize	Exact match	New York, OR, United StatesHQ recorded Nov 6, 2026	1,001-5,000	5,035 contacts →
	Exact match “Welocalize, a Welo Global brand, serves localization teams through AI-enabled multilingual content solutions that enable enterprises to operate and scale globally.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	SEO INC	Exact match	Carlsbad, CA, United StatesHQ recorded Nov 6, 2026	n/a	838 contacts →
	Exact match “Since its inception in 1997, SEO Inc.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	EC Innovations, INC	Exact match	Wilmington, NY, United StatesHQ recorded Nov 6, 2026	501-1,000	501 contacts →
	Exact match “Unlock new worlds!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	KPL Tech Solution Pvt. LTD	Exact match	Middletown, DE, United StatesHQ recorded Nov 6, 2026	201-500	368 contacts →
	Exact match “Do you want to see your business on heights?” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Acclaro	Exact match	Boston, CA, United StatesHQ recorded Nov 6, 2026	51-200	330 contacts →
	Exact match “Acclaro is a content intelligence solutions business, helping brands communicate with purpose, precision, and global impact.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Boostability	Exact match	Lehi, UT, United StatesHQ recorded Nov 6, 2026	201-500	327 contacts →
	Exact match “At Boostability, we're more than just an SEO company; we're your strategic partner in driving online growth.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Brandrep	Exact match	Irvine, CA, United StatesHQ recorded Nov 6, 2026	51-200	165 contacts →
	Exact match “Local Marketing Company who specializes in helping small businesses with building and managing their online presence through Local SEO, Lead Generation, Local Directory submission…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	GPO	Exact match	Austin, TX, United StatesHQ recorded Nov 6, 2026	n/a	153 contacts →
	Exact match “GPO is everything search.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Alconost	Exact match	Alexandria, VA, United StatesHQ recorded Nov 6, 2026	51-200	147 contacts →
	Exact match “Alconost handles every aspect of localization, from translation and cultural adaptation to continuous multilingual content updates and engineering, so you can focus on your top…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	SEOP	Exact match	Irvine, CA, United StatesHQ recorded Nov 6, 2026	51-200	145 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Mainstreethost	Exact match	Amherst, OH, United StatesHQ recorded Nov 6, 2026	51-200	135 contacts →
	Exact match “Mainstreethost specializes in everything you need to have a successful online presence, including search engine optimization, paid search marketing, website design, social media…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Ulatus Crimson Interactive	Exact match	New York, NY, United StatesHQ recorded Nov 6, 2026	201-500	128 contacts →
	Exact match “Ulatus, a Crimson Interactive company, is a trusted brand for professional localization services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Search Engine Journal	Exact match	Boca Raton, FL, United StatesHQ recorded Nov 6, 2026	11-50	123 contacts →
	Exact match “We are SEO professionals, content writers, and marketers, just like you.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Hennessey Digital	Exact match	North Hollywood, CA, United StatesHQ recorded Nov 6, 2026	51-200	122 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Local Splash	Exact match	Fountain Valley, CA, United StatesHQ recorded Nov 6, 2026	51-200	122 contacts →
	Exact match “Local Splash is the leading local SEO service that specializes in getting our clients high rankings in local search engine results.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Mediatrenz	Exact match	Middletown, DE, United StatesHQ recorded Nov 6, 2026	51-200	113 contacts →
	Exact match “MediaTrenz is a leading ROI-driven SEO company in India that help you rank high on search engine results.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Local Concept	Exact match	San Diego, CA, United StatesHQ recorded Nov 6, 2026	11-50	112 contacts →
	Exact match “Rooted in language and cultural accuracy, our localization solutions have laid the foundation for us to emerge as a legacy of unsurpassed quality worldwide.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Seomoz	Exact match	Seattle, WA, United StatesHQ recorded Nov 6, 2026	51-200	107 contacts →
	Exact match “SEOmoz is the world’s most popular provider of SEO software.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Seoprofy	Exact match	Orlando, FL, United StatesHQ recorded Nov 6, 2026	51-200	102 contacts →
	Exact match “SeoProfy is your strategic SEO and AI visibility partner for organic and AI visibility that brings real ROI.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Paper Street Media	Exact match	Miami, FL, United StatesHQ recorded Nov 6, 2026	11-50	96 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	Direct Online Marketing	Exact match	Pittsburgh, PA, United StatesHQ recorded Nov 6, 2026	11-50	96 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Palex Group INC	Exact match	Alexandria, VA, United StatesHQ recorded Nov 6, 2026	51-200	95 contacts →
	Exact match “For over 20 years, Palex has empowered software, multimedia, e-learning, and medical device companies with world-class translation and localization solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Previsible	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	85 contacts →
	Exact match “Previsible empowers businesses with actionable SEO consulting, content marketing and development designed to drive impactful results.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Fuel Online Digital Marketing Agency - SEO Company	Exact match	Boston, MA, United StatesHQ recorded Nov 6, 2026	51-200	84 contacts →
	Exact match “Fuel Online is the definitive global authority in Generative Engine Optimization (GEO) and high-performance search strategy.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	Infohana	Exact match	Dover, DE, United StatesHQ recorded Nov 6, 2026	51-200	78 contacts →
	Exact match “InfOhana is a premium language localization partner helping content creators, media companies, entertainment brands, streaming platforms, agencies, and global businesses connect…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “localization SEO services”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 3,465 localization SEO services based in the United States

See the full list, filter by size, metro and specialty, and access 5,228 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Localization SEO services based in the United States at a glance

As of Nov 6, 2026

8.8%Verified-email coverage

17.2Average contacts per company

1-10Median size (employees)

4.0%Largest-city concentration · New York

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

2,495

11-50

789

51-200

137

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 3,465 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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: Company records associated with the United States whose business descriptions match “localization SEO services” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 5,228 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Localization SEO services by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “localization SEO services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many localization SEO services are there based in the United States?

RevenueBase identified 3,465 company matches for localization SEO services associated with the United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Welocalize tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most localization SEO services?

New York leads with 138 company records, followed by Los Angeles (99) and Houston (66).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 5,228 professional contacts with verified work emails tracked across these 3,465 companies; direct dials are available where recorded.

How current is this list?

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