Company lists · Data refreshed September 2026

Top 25 SEO companies for professional services worldwide

Name: SEO companies for professional services worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 19,855 companies tracked

RevenueBase identified 19,855 SEO companies for professional services worldwide as of September 2026 and tracks 129,301 professional contacts across them, including 12,727 with verified work emails. The United States is the largest market and London the largest hub.

This list covers SEO companies for professional services worldwide, 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 29, 2026. Country and city lists for SEO companies for professional services follow the table.

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 29, 2026 86% judged on-target in blind review

19,855Companies

129,301Contacts tracked

12,727Verified emails

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The 25 largest SEO companies for professional services worldwide

Ranked by team size

Top 25 of 19,855 SEO companies for professional services worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to SEO companies for professional services: 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	ZZP Zelfstandig Ondernemer	Partial evidence	Dokkum, NetherlandsHQ checked Sep 29, 2026	n/a	4,282 contacts →
	Partial evidence “Huisstijl ontwikkeling/websites/SEO/Internet Marketing/Zelfstandig Ondernemer/ZZP Huisstijl ontwikkeling/websites/SEO/Internet Marketing/Zelfstandig Ondernemer/ZZP Huisstijl…” Source: RevenueBase Database · checked Sep 29, 2026
2	SEO INC	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 29, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 29, 2026
3	411 Locals	Indirect evidence	Las Vegas, United StatesHQ checked Sep 29, 2026	201-500	687 contacts →
	Indirect evidence “About Us 411 Locals is an award-winning digital marketing agency dedicated to driving growth for US-based small and medium-sized businesses (SMBs).” Source: RevenueBase Database · checked Sep 29, 2026
4	KPL Tech Solution Pvt. LTD	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 29, 2026	201-500	390 contacts →
	Indirect evidence “Do you want to see your business on heights?” Source: RevenueBase Database · checked Sep 29, 2026
5	Boostability	Partial evidence	Lehi, UT, United StatesHQ checked Sep 29, 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 29, 2026
6	Coalition Technologies	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 29, 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 29, 2026
7	Jalis, Agence WEB	Indirect evidence	Marseille, FranceHQ checked Sep 29, 2026	51-200	211 contacts →
	Indirect evidence “L’agence digitale marseillaise Jalis a été fondée par Serge et Ghizlaine Alagy en 2002.” Source: RevenueBase Database · checked Sep 29, 2026
8	Click Here Digital	Indirect evidence	Baton Rouge, LA, United StatesHQ checked Sep 29, 2026	51-200	167 contacts →
	Indirect evidence “Founded by Bo White in 1993 during the early stages of the Internet, Click Here Digital is a digital marketing and consulting firm that provides full-service digital marketing…” Source: RevenueBase Database · checked Sep 29, 2026
9	Futur Digital	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 29, 2026	201-500	163 contacts →
	Indirect evidence “Votre agence de Marketing Digital, spécialiste du référencement local depuis 2009 Chez Futur Digital, nous comprenons l'importance cruciale d'une présence digitale robuste pour…” Source: RevenueBase Database · checked Sep 29, 2026
10	GO Local Interactive	Partial evidence	Overland Park, KS, United StatesHQ checked Sep 29, 2026	51-200	150 contacts →
	Partial evidence “Go Local Interactive is a premium digital marketing agency specializing in SEO, PPC, Content, and Web products.” Source: RevenueBase Database · checked Sep 29, 2026
11	SKS Tech Solution	Indirect evidence	Noida, IndiaHQ checked Sep 29, 2026	51-200	148 contacts →
	Indirect evidence “Welcome to SKS TECH SOLUTION, your number one shop for all things Digital Marketing Services.” Source: RevenueBase Database · checked Sep 29, 2026
12	Liveseo	Partial evidence	Maringá, BrazilHQ checked Sep 29, 2026	51-200	141 contacts →
	Partial evidence “Founded in 2016 in Spain, and currently operating in Brazil, liveSEO performs consistent and well-targeted work in SEO (search engine optimization), attracting companies looking…” Source: RevenueBase Database · checked Sep 29, 2026
13	Blushark Digital	Indirect evidence	Washington, DC, United StatesHQ checked Sep 29, 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 29, 2026
14	Essentials The Agency	Indirect evidence	Jakarta Barat, IndonesiaHQ checked Sep 29, 2026	11-50	134 contacts →
	Indirect evidence “At essentials the agency, we help brands take control of their digital presence and dominate their online space, not just exist in it.” Source: RevenueBase Database · checked Sep 29, 2026
15	Dealeron	Indirect evidence	Rockville, MD, United StatesHQ checked Sep 29, 2026	201-500	129 contacts →
	Indirect evidence “DealerOn has been the perfect partner for over dealers across North America.” Source: RevenueBase Database · checked Sep 29, 2026
16	Mainstreethost	Indirect evidence	Amherst, NY, United StatesHQ checked Sep 29, 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 29, 2026
17	Semalt	Partial evidence	Kyiv, UkraineHQ checked Sep 29, 2026	51-200	127 contacts →
	Partial evidence “Semalt is a results-driven, technology-inspired SEO company.” Source: RevenueBase Database · checked Sep 29, 2026
18	FIX Group Of Companies	Indirect evidence	Mesa Geitonia, CyprusHQ checked Sep 29, 2026	501-1,000	126 contacts →
	Indirect evidence “FIX - профессиональная компания, оказывающая полный спектр услуг в области интернет-маркетинга: разработка web-ресурсов и web-приложений, поисковая оптимизация и продвижение…” Source: RevenueBase Database · checked Sep 29, 2026
19	SEOP	Partial evidence	Irvine, CA, United StatesHQ checked Sep 29, 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 29, 2026
20	Local Splash	Partial evidence	Fountain Valley, CA, United StatesHQ checked Sep 29, 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 29, 2026
21	Consultwebs	Indirect evidence	Raleigh, NC, United StatesHQ checked Sep 29, 2026	51-200	116 contacts →
	Indirect evidence “Most law firms invest in advertising, but struggle to connect the spend to revenue growth.” Source: RevenueBase Database · checked Sep 29, 2026
22	Seobrothers	Partial evidence	Skanste, LatviaHQ checked Sep 29, 2026	51-200	116 contacts →
	Partial evidence “SEOBROTHERS is a full-cycle SEO agency where search engine optimisation and digital marketing drive everything we do.” Source: RevenueBase Database · checked Sep 29, 2026
23	Hennessey Digital	Partial evidence	North Hollywood, CA, United StatesHQ checked Sep 29, 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 29, 2026
24	G-Rank	Indirect evidence	Hyderabad, IndiaHQ checked Sep 29, 2026	51-200	114 contacts →
	Indirect evidence “G-Rank an ISO 9001:2008 certified company is established in the year 2010 and now it is a leading Digital Marketing Company that is authorized by Google.” Source: RevenueBase Database · checked Sep 29, 2026
25	aweb.ua	Partial evidence	Kyiv, UkraineHQ checked Sep 29, 2026	51-200	113 contacts →
	Partial evidence “Aweb is a digital marketing agency providing high-quality PPC & SEO services since 2006.” Source: RevenueBase Database · checked Sep 29, 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: SEO companies for professional services. 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 SEO companies for professional services.
Partial evidence: Its own public description names part of SEO companies for professional services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SEO companies for professional services. 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 19,855 SEO companies for professional services worldwide

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SEO companies for professional services worldwide at a glance

As of Sep 29, 2026

9.8%Verified-email coverage

6.5Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

14,813

11-50

4,157

51-200

624

201-500

125

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 SEO companies for professional services, 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.
Coverage: Every country. Country and city lists for SEO companies for professional services are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “SEO companies for professional services”. 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 SEO companies for professional services), 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 SEO companies for professional services, and records with no verified work email.
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, 12,727 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 29, 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.

SEO companies for professional services by location

82 lists · largest first

Every SEO companies for professional services list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 SEO companies for professional services, 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 SEO companies for professional services are there worldwide?

RevenueBase identified 19,855 SEO companies for professional services worldwide 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?

ZZP Zelfstandig Ondernemer, headquartered in Dokkum, tops this list with the largest team on record.

Which country has the most SEO companies for professional services?

The United States leads with 4,781 companies, followed by India (2,221) and the United Kingdom (1,255). Every SEO companies for professional services list by country and city is linked on this page.

Which city has the most SEO companies for professional services?

London leads with 339 headquartered companies, followed by New Delhi (208) and New York (163).

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 12,727 verified decision-maker contacts tracked across these 19,855 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 29, 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.