Company lists · Data refreshed September 2026

Top 25 SEO audit firms worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 15,773 companies tracked

RevenueBase identified 15,773 company matches for SEO audit firms worldwide as of September 2026 and tracks 116,029 professional contacts across them, including 10,387 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for SEO audit firms worldwide, 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 September 21, 2026. Country and city lists for SEO audit firms follow the table.

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 Sep 21, 2026 How this list was built

15,773Companies

116,029Contacts tracked

10,387Verified emails

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The 25 largest SEO audit firms worldwide

Ranked by team size

Top 25 of 15,773 company matches for SEO audit firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 21, 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	SEO	Exact match	Melbourne, AustraliaHQ recorded Sep 21, 2026	n/a	6,896 contacts →
	Exact match “The way people search is changing.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
2	SEO INC	Exact match	Carlsbad, CA, United StatesHQ recorded Sep 21, 2026	n/a	825 contacts →
	Exact match “Since its inception in 1997, SEO Inc.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
3	Wildnet Technologies	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	201-500	590 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
4	Smart Solutions	Exact match	United StatesHQ recorded Sep 21, 2026	n/a	534 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
5	KPL Tech Solution Pvt. LTD	Exact match	Middletown, DE, United StatesHQ recorded Sep 21, 2026	201-500	390 contacts →
	Exact match “Do you want to see your business on heights?” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
6	Boostability	Exact match	Lehi, UT, United StatesHQ recorded Sep 21, 2026	201-500	326 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 · Sep 21, 2026 · View company records in RevenueBase
7	Coalition Technologies	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 21, 2026	201-500	320 contacts →
	Exact match “Coalition Technologies is one of the leading SEO & web design agencies in the United States.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
8	auroin.com	Exact match	New York, NY, United StatesHQ recorded Sep 21, 2026	51-200	183 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
9	WP SEO AI	Exact match	Amsterdam, NetherlandsHQ recorded Sep 21, 2026	51-200	166 contacts →
	Exact match “Even before AI-powered Search and platforms like ChatGPT or Perplexity started reshaping how people search, we anticipated the shift in user behaviour.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
10	Liveseo	Exact match	Maringá, BrazilHQ recorded Sep 21, 2026	51-200	141 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
11	Blushark Digital	Exact match	Washington, DC, United StatesHQ recorded Sep 21, 2026	51-200	137 contacts →
	Exact match “BluShark Digital LLC was founded on the principle of providing high quality online marketing solutions for companies struggling to stand out online.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
12	Essentials The Agency	Exact match	Jakarta Barat, IndonesiaHQ recorded Sep 21, 2026	11-50	134 contacts →
	Exact match “At essentials the agency, we help brands take control of their digital presence and dominate their online space, not just exist in it.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
13	Dealeron	Exact match	Rockville, MD, United StatesHQ recorded Sep 21, 2026	201-500	129 contacts →
	Exact match “DealerOn has been the perfect partner for over dealers across North America.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
14	Mainstreethost	Exact match	Amherst, NY, United StatesHQ recorded Sep 21, 2026	51-200	128 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 · Sep 21, 2026 · View company records in RevenueBase
15	Semalt	Exact match	Kyiv, UkraineHQ recorded Sep 21, 2026	51-200	127 contacts →
	Exact match “Semalt is a results-driven, technology-inspired SEO company.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
16	FIX Group Of Companies	Exact match	Mesa Geitonia, CyprusHQ recorded Sep 21, 2026	501-1,000	126 contacts →
	Exact match “FIX - профессиональная компания, оказывающая полный спектр услуг в области интернет-маркетинга: разработка web-ресурсов и web-приложений, поисковая оптимизация и продвижение…” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
17	Search Engine Journal	Exact match	Boca Raton, FL, United StatesHQ recorded Sep 21, 2026	11-50	122 contacts →
	Exact match “We are SEO professionals, content writers, and marketers, just like you.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
18	SEOP	Exact match	Irvine, CA, United StatesHQ recorded Sep 21, 2026	51-200	121 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 · Sep 21, 2026 · View company records in RevenueBase
19	Leave Code Technologies Pvt. LTD	Exact match	Laxmi Nagar, IndiaHQ recorded Sep 21, 2026	11-50	120 contacts →
	Exact match “Leave Code offers you the best digital marketing services for your products and services.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
20	Local Splash	Exact match	Fountain Valley, CA, United StatesHQ recorded Sep 21, 2026	51-200	119 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 · Sep 21, 2026 · View company records in RevenueBase
21	Seobrothers	Exact match	Skanste, LatviaHQ recorded Sep 21, 2026	51-200	116 contacts →
	Exact match “SEOBROTHERS is a full-cycle SEO agency where search engine optimisation and digital marketing drive everything we do.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
22	Hennessey Digital	Exact match	North Hollywood, CA, United StatesHQ recorded Sep 21, 2026	51-200	115 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 · Sep 21, 2026 · View company records in RevenueBase
23	Studiohawk	Exact match	Melbourne, AustraliaHQ recorded Sep 21, 2026	51-200	111 contacts →
	Exact match “StudioHawk is Australia’s #1 dedicated SEO & AI Search agency.” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
24	Grizzly NEW Marketing	Exact match	Breda, NetherlandsHQ recorded Sep 21, 2026	51-200	109 contacts →
	Exact match “Grizzly New Marketing is een gespecialiseerd SEO marketingbureau in Nederland (Breda en Rotterdam), België (Antwerpen-Berchem) en de Verenigde Staten (New York).” Recorded in the RevenueBase company graph · Sep 21, 2026 · View company records in RevenueBase
25	Bigseo	Exact match	Barcelona, SpainHQ recorded Sep 21, 2026	51-200	108 contacts →
	Exact match “En nuestra agencia SEO en Barcelona somos unos apasionados del posicionamiento web.” Recorded in the RevenueBase company graph · Sep 21, 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 “SEO audit firms”. 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 15,773 SEO audit firms worldwide

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SEO audit firms worldwide at a glance

As of Sep 21, 2026

9.0%Verified-email coverage

7.4Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · London

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11,613

11-50

3,424

51-200

529

201-500

102

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

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.
Coverage: Every country. Country and city lists for SEO audit firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “SEO audit firms” 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. 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 10,387 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 September 21, 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.

SEO audit firms by location

62 lists · largest first

Every SEO audit 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 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 “SEO audit firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many SEO audit firms are there worldwide?

RevenueBase identified 15,773 company matches for SEO audit firms worldwide as of September 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?

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

Which country has the most SEO audit firms?

The United States leads with 3,456 companies, followed by India (1,738) and the United Kingdom (1,040). Every SEO audit firms list by country and city is linked on this page.

Which city has the most SEO audit firms?

London leads with 293 company records, followed by New Delhi (176) and New York (144).

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 10,387 professional contacts with verified work emails tracked across these 15,773 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 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 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.