Company lists · Data refreshed September 2026

Top 25 Sem consulting firms worldwide

RevenueBase identified 31,613 sem consulting firms worldwide as of September 2026 and tracks 178,663 professional contacts across them, including 25,117 with verified work emails. The United States is the largest market and London the largest hub.

This list covers sem consulting 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 29, 2026. Country and city lists for sem consulting 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 29, 2026 86% judged on-target in blind review
31,613Companies
178,663Contacts tracked
25,117Verified emails
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The 25 largest sem consulting firms worldwide

Ranked by team size
Top 25 of 31,613 sem consulting firms worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to sem consulting 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceMelbourne, AustraliaHQ checked Sep 29, 2026n/a6,896 contacts →

Indirect evidence

“The way people search is changing.”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceCarlsbad, CA, United StatesHQ checked Sep 29, 2026n/a825 contacts →

Indirect evidence

“Since its inception in 1997, SEO Inc.”

Source: RevenueBase Database · checked Sep 29, 2026
3Indirect evidenceNew Delhi, IndiaHQ checked Sep 29, 2026201-500543 contacts →

Indirect evidence

“Techmagnate is a leading, award-winning digital marketing agency.”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceMumbai, IndiaHQ checked Sep 29, 2026201-500428 contacts →

Indirect evidence

“Within a short span, eBrandz has seen enormous growth.”

Source: RevenueBase Database · checked Sep 29, 2026
5Indirect evidenceMiddletown, DE, United StatesHQ checked Sep 29, 2026201-500390 contacts →

Indirect evidence

“Do you want to see your business on heights?”

Source: RevenueBase Database · checked Sep 29, 2026
6Indirect evidenceBuffalo, NY, United StatesHQ checked Sep 29, 2026501-1,000383 contacts →

Indirect evidence

“LocalEdge, a Hearst Media Services Company, offers a full suite of online advertising products and services for any size business and budget across the country.”

Source: RevenueBase Database · checked Sep 29, 2026
7Indirect evidenceCrows Nest, United StatesHQ checked Sep 29, 202651-200345 contacts →

Indirect evidence

“Online Marketing Gurus (OMG) is an award-winning Leading Digital Marketing Agency, with locations in Australia, USA, UAE & Singapore.”

Source: RevenueBase Database · checked Sep 29, 2026
8Indirect evidenceMelbourne, United StatesHQ checked Sep 29, 2026201-500332 contacts →

Indirect evidence

“When it comes to Digital Marketing, it’s the First Page, or it’s nothing.”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidenceLehi, UT, United StatesHQ checked Sep 29, 2026201-500326 contacts →

Indirect 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
10Indirect evidenceJaipur, IndiaHQ checked Sep 29, 2026201-500281 contacts →

Indirect evidence

“Most businesses don't struggle because they lack effort.”

Source: RevenueBase Database · checked Sep 29, 2026
11Indirect evidenceNoida, IndiaHQ checked Sep 29, 2026501-1,000259 contacts →

Indirect evidence

“AdsRole is a results-driven digital marketing company that helps businesses grow through smart advertising and proven growth strategies.”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceCalicut, IndiaHQ checked Sep 29, 202651-200257 contacts →

Indirect evidence

“Acodez is a leading web design and online marketing agency based in India, renowned for our exceptional services and accolades.”

Source: RevenueBase Database · checked Sep 29, 2026
13Indirect evidenceAkron, OH, United StatesHQ checked Sep 29, 2026201-500254 contacts →

Indirect evidence

“At OuterBox, we believe growth is oxygen.”

Source: RevenueBase Database · checked Sep 29, 2026
14Indirect evidenceToronto, ON, CanadaHQ checked Sep 29, 202651-200233 contacts →

Indirect evidence

“If your business isn't generating consistent leads online, the problem usually is your digital presence.”

Source: RevenueBase Database · checked Sep 29, 2026
15Indirect evidenceDallas, TX, United StatesHQ checked Sep 29, 202651-200232 contacts →

Indirect evidence

“Website: Thrive is a full-service digital marketing agency headquartered in Arlington, Texas.”

Source: RevenueBase Database · checked Sep 29, 2026
16Indirect evidenceМинск, BelarusHQ checked Sep 29, 202651-200231 contacts →

Indirect evidence

“ARTOX media – digital-агентство с офисами в Москве и Минске, предоставляющее полный комплекс услуг для успешного развития и продвижения вашего бизнеса в интернете.”

Source: RevenueBase Database · checked Sep 29, 2026
17Indirect evidenceKowloon, Hong KongHQ checked Sep 29, 2026201-500230 contacts →

Indirect evidence

“Established in 1996, AsiaPac Net Media Limited (AsiaPac) is a leading digital marketing agency that provides technology-driven digital marketing solutions to clients across the…”

Source: RevenueBase Database · checked Sep 29, 2026
18Indirect evidenceBangalore, IndiaHQ checked Sep 29, 202651-200229 contacts →

Indirect evidence

“We're Odigma, we're leading the way India does digital marketing.”

Source: RevenueBase Database · checked Sep 29, 2026
19Indirect evidenceMysore, IndiaHQ checked Sep 29, 2026201-500221 contacts →

Indirect evidence

“Dollarbird is an emerging leader of online media operations.”

Source: RevenueBase Database · checked Sep 29, 2026
20Indirect evidenceCesson-sévigné, FranceHQ checked Sep 29, 202651-200213 contacts →

Indirect evidence

“MEDIAVEILLE est une agence de conseil et de services de marketing online qui met en œuvre des stratégies de conquête et de fidélisation sur Internet.”

Source: RevenueBase Database · checked Sep 29, 2026
21Indirect evidenceSan Diego, CA, United StatesHQ checked Sep 29, 202651-200203 contacts →

Indirect evidence

“IMI (now REQ) is a full-service digital marketing agency focused on omnichannel strategies and results.”

Source: RevenueBase Database · checked Sep 29, 2026
22Indirect evidenceVienna, AustriaHQ checked Sep 29, 202651-200190 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 29, 2026
23Partial evidenceSeattle, WA, United StatesHQ checked Sep 29, 2026201-500188 contacts →

Partial evidence

“Hargis Engineers is a mechanical, electrical, telecommunications, security, energy consulting engineering, and commissioning firm.”

Source: RevenueBase Database · checked Sep 29, 2026
24Indirect evidenceKolkata, IndiaHQ checked Sep 29, 2026201-500187 contacts →

Indirect evidence

“TechShu is a work-first performance marketing agency in India, helping enterprises and high-growth brands drive measurable revenue through data-led digital marketing.”

Source: RevenueBase Database · checked Sep 29, 2026
25Indirect evidencePhoenix, AZ, United StatesHQ checked Sep 29, 202651-200184 contacts →

Indirect evidence

“BizIQ: Redefining Digital Marketing Excellence.”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 31,613 sem consulting firms worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 25,117 reachable decision-makers.

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Sem consulting firms worldwide at a glance

As of Sep 29, 2026
14.1%Verified-email coverage
5.7Average contacts per company
1-10Median size (employees)
1.7%Largest-city concentration · London
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
22,461
11-50
7,605
51-200
1,154
201-500
222
501-1,000
48
1,001-5,000
21
5,001-10,000
9
10001+
34

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 sem consulting 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 sem consulting firms are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “sem consulting 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 sem consulting 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 sem consulting 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, 25,117 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.

Sem consulting firms by location

129 lists · largest first

Every Sem consulting 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 sem consulting 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 sem consulting firms are there worldwide?

RevenueBase identified 31,613 sem consulting 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, headquartered in Melbourne, tops this list with the largest team on record.

Which country has the most sem consulting firms?

The United States leads with 6,818 companies, followed by India (5,317) and the United Kingdom (1,788). Every sem consulting firms list by country and city is linked on this page.

Which city has the most sem consulting firms?

London leads with 523 headquartered companies, followed by New Delhi (446) and Noida (345).

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 25,117 verified decision-maker contacts tracked across these 31,613 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.