Company lists · Data refreshed September 2026

Top 25 B2B SEO firms worldwide

Name: B2B SEO firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 21,140 companies tracked

RevenueBase identified 21,140 B2B SEO firms worldwide as of September 2026 and tracks 139,047 professional contacts across them, including 15,814 with verified work emails. The United States is the largest market and London the largest hub.

This list covers B2B SEO firms 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 21, 2026. Country and city lists for B2B SEO firms 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 21, 2026 86% judged on-target in blind review

21,140Companies

139,047Contacts tracked

15,814Verified emails

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The 25 largest B2B SEO firms worldwide

Ranked by team size

Top 25 of 21,140 B2B SEO firms worldwide, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to B2B SEO firms: 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	SEO INC	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 21, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 21, 2026
2	411 Locals	Indirect evidence	Las Vegas, United StatesHQ checked Sep 21, 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 21, 2026
3	Wildnet Technologies	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	590 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 21, 2026
4	Clickout Media	Partial evidence	Naxxar, MaltaHQ checked Sep 21, 2026	201-500	463 contacts →
	Partial evidence “ClickOut Media is an remote first, industry leading, multichannel marketing company, delivering best in class SEO & content for esteemed clients all over the world.” Source: RevenueBase Database · checked Sep 21, 2026
5	Seoclerks	Partial evidence	United StatesHQ checked Sep 21, 2026	n/a	445 contacts →
	Partial evidence “The largest SEO Marketplace on the web with SEO experts from every inch of the world.” Source: RevenueBase Database · checked Sep 21, 2026
6	Ebrandz LLP	Indirect evidence	Mumbai, IndiaHQ checked Sep 21, 2026	201-500	428 contacts →
	Indirect evidence “Within a short span, eBrandz has seen enormous growth.” Source: RevenueBase Database · checked Sep 21, 2026
7	KPL Tech Solution Pvt. LTD	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 21, 2026	201-500	390 contacts →
	Indirect evidence “Do you want to see your business on heights?” Source: RevenueBase Database · checked Sep 21, 2026
8	Boostability	Partial evidence	Lehi, UT, United StatesHQ checked Sep 21, 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 21, 2026
9	Coalition Technologies	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 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 21, 2026
10	Techwyse Internet Marketing	Indirect evidence	Toronto, ON, CanadaHQ checked Sep 21, 2026	51-200	233 contacts →
	Indirect evidence “If your business isn't generating consistent leads online, the problem usually is your digital presence.” Source: RevenueBase Database · checked Sep 21, 2026
11	GROW	Partial evidence	Jerusalem, IsraelHQ checked Sep 21, 2026	n/a	230 contacts →
	Partial evidence “GROW is a full-service marketing agency passionate about helping B2B companies achieve their goals.” Source: RevenueBase Database · checked Sep 21, 2026
12	Walker Sands	Partial evidence	Chicago, IL, United StatesHQ checked Sep 21, 2026	201-500	199 contacts →
	Partial evidence “Walker Sands is an integrated B2B growth services agency with expertise in strategy, data, content, creative, strategic communications, digital marketing and RevOps.” Source: RevenueBase Database · checked Sep 21, 2026
13	Herold	Indirect evidence	Vienna, AustriaHQ checked Sep 21, 2026	51-200	190 contacts →
	Indirect evidence “Seit der Gründung in 1919 hat sich Herold laufend weiterentwickelt und ist heute Teil der group.one, die zu einer der führenden Unternehmensgruppen in Europa im Bereich Domains…” Source: RevenueBase Database · checked Sep 21, 2026
14	That Company	Indirect evidence	Leesburg, FL, United StatesHQ checked Sep 21, 2026	n/a	187 contacts →
	Indirect evidence “That Company is a White Label internet marketing firm with over 15 years of experience and a strong customer service core.” Source: RevenueBase Database · checked Sep 21, 2026
15	Channel Technologies Private Limited	Indirect evidence	Noida, IndiaHQ checked Sep 21, 2026	51-200	168 contacts →
	Indirect evidence “Founded in 1998, Channel Technologies (CT) began with a mission to offer marketing, technology, and management consulting services-with a core strength in building and managing…” Source: RevenueBase Database · checked Sep 21, 2026
16	Futur Digital	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 21, 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 21, 2026
17	Gr0	Indirect evidence	Los Angeles, CA, United StatesHQ checked Sep 21, 2026	51-200	157 contacts →
	Indirect evidence “At GR0, we are in the business of helping businesses.” Source: RevenueBase Database · checked Sep 21, 2026
18	Brandrep	Partial evidence	Irvine, CA, United StatesHQ checked Sep 21, 2026	51-200	152 contacts →
	Partial evidence “Local Marketing Company who specializes in helping small businesses with building and managing their online presence through Local SEO, Lead Generation, Local Directory submission…” Source: RevenueBase Database · checked Sep 21, 2026
19	SKS Tech Solution	Indirect evidence	Noida, IndiaHQ checked Sep 21, 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 21, 2026
20	Liveseo	Partial evidence	Maringá, BrazilHQ checked Sep 21, 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 21, 2026
21	Publicis PRO	Partial evidence	London, United KingdomHQ checked Sep 21, 2026	51-200	139 contacts →
	Partial evidence “Publicis Pro is the specialist B2B marketing agency within Publicis Groupe, the world's number one marketing holding group.” Source: RevenueBase Database · checked Sep 21, 2026
22	Blushark Digital	Indirect evidence	Washington, DC, United StatesHQ checked Sep 21, 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 21, 2026
23	National Positions	Indirect evidence	Westlake Village, CA, United StatesHQ checked Sep 21, 2026	51-200	137 contacts →
	Indirect evidence “National Positions, The Digital Growth Agency, is a 360-degree digital marketing firm located in Southern California.” Source: RevenueBase Database · checked Sep 21, 2026
24	MOPRO	Indirect evidence	Newport Beach, CA, United StatesHQ checked Sep 21, 2026	51-200	134 contacts →
	Indirect evidence “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: RevenueBase Database · checked Sep 21, 2026
25	Essentials The Agency	Indirect evidence	Jakarta Barat, IndonesiaHQ checked Sep 21, 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 21, 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: B2B SEO firms. 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 B2B SEO firms.
Partial evidence: Its own public description names part of B2B SEO firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name B2B SEO firms. 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 21,140 B2B SEO firms worldwide

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B2B SEO firms worldwide at a glance

As of Sep 21, 2026

11.4%Verified-email coverage

6.6Average contacts per company

1-10Median size (employees)

1.7%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

15,340

11-50

4,776

51-200

752

201-500

144

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 B2B SEO firms, 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 B2B SEO firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “B2B SEO firms”. 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 B2B SEO firms), 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 B2B SEO firms, 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, 15,814 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 21, 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.

B2B SEO firms by location

86 lists · largest first

Every B2B SEO firms 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 B2B SEO firms, 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 B2B SEO firms are there worldwide?

RevenueBase identified 21,140 B2B SEO firms 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?

SEO INC, headquartered in Carlsbad, tops this list with the largest team on record.

Which country has the most B2B SEO firms?

The United States leads with 5,083 companies, followed by India (2,545) and the United Kingdom (1,368). Every B2B SEO firms list by country and city is linked on this page.

Which city has the most B2B SEO firms?

London leads with 359 headquartered companies, followed by New Delhi (243) and New York (188).

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 15,814 verified decision-maker contacts tracked across these 21,140 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 21, 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.