Company lists · Data refreshed September 2026

Top 25 Healthcare SEO agencies worldwide

Name: Healthcare SEO agencies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 9,567 companies tracked

RevenueBase identified 9,567 healthcare SEO agencies worldwide as of September 2026 and tracks 53,500 professional contacts across them, including 8,833 with verified work emails. The United States is the largest market and London the largest hub.

This list covers healthcare SEO agencies 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 28, 2026. Country and city lists for healthcare SEO agencies 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 28, 2026 86% judged on-target in blind review

9,567Companies

53,500Contacts tracked

8,833Verified emails

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The 25 largest healthcare SEO agencies worldwide

Ranked by team size

Top 25 of 9,567 healthcare SEO agencies worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to healthcare SEO agencies: 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	Area 23	Partial evidence	New York, United StatesHQ checked Sep 28, 2026	1,001-5,000	958 contacts →
	Partial evidence “AREA 23, part of Omnicom Health, is a full-service agency focused on pushing creativity and invention in healthcare marketing to new heights.” Source: RevenueBase Database · checked Sep 28, 2026
2	SEO INC	Partial evidence	Carlsbad, CA, United StatesHQ checked Sep 28, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 28, 2026
3	Publicis Health Media	Partial evidence	Philadelphia, PA, United StatesHQ checked Sep 28, 2026	501-1,000	747 contacts →
	Partial evidence “PHM is the leading health media agency in the US, built for the modern healthcare experience.” Source: RevenueBase Database · checked Sep 28, 2026
4	KPL Tech Solution Pvt. LTD	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 28, 2026	201-500	390 contacts →
	Indirect evidence “Do you want to see your business on heights?” Source: RevenueBase Database · checked Sep 28, 2026
5	Boostability	Partial evidence	Lehi, UT, United StatesHQ checked Sep 28, 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 28, 2026
6	Coalition Technologies	Partial evidence	Los Angeles, CA, United StatesHQ checked Sep 28, 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 28, 2026
7	Unlock Health	Partial evidence	Nashville, TN, United StatesHQ checked Sep 28, 2026	201-500	305 contacts →
	Partial evidence “Unlock Health is a full-service marketing communications agency that helps healthcare organizations make authentic connections with patients and communities.” Source: RevenueBase Database · checked Sep 28, 2026
8	Futur Digital	Indirect evidence	Boulogne-billancourt, FranceHQ checked Sep 28, 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 28, 2026
9	Prosites	Indirect evidence	Murrieta, CA, United StatesHQ checked Sep 28, 2026	201-500	159 contacts →
	Indirect evidence “In a digital world, you need a digital partner.” Source: RevenueBase Database · checked Sep 28, 2026
10	Harrison Star	Partial evidence	New York, NY, United StatesHQ checked Sep 28, 2026	201-500	159 contacts →
	Partial evidence “Harrison and Star is a full-service, global healthcare marketing agency, combining show-stopping creative, strategic savvy, and deep scientific expertise.” Source: RevenueBase Database · checked Sep 28, 2026
11	POD Marketing INC	Indirect evidence	Calgary, AB, CanadaHQ checked Sep 28, 2026	51-200	147 contacts →
	Indirect evidence “POD Marketing is the parent company of four specialized verticals: Marketing4ECPs (eye care), CITIZEN (senior living marketing), SmileShop Dental Marketing, and Cleinman…” Source: RevenueBase Database · checked Sep 28, 2026
12	Propeller	Indirect evidence	Summit, NJ, United StatesHQ checked Sep 28, 2026	51-200	146 contacts →
	Indirect evidence “Making Innovation a Reality.” Source: RevenueBase Database · checked Sep 28, 2026
13	Liveseo	Partial evidence	Maringá, BrazilHQ checked Sep 28, 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 28, 2026
14	Culthealth, An Indegene Company	Indirect evidence	New York, NY, United StatesHQ checked Sep 28, 2026	51-200	138 contacts →
	Indirect evidence “2024 Manny Gold Winner 2023 "Agency on the Rise" Manny Award Winner 2023 Creative Floor Award Winner 2023 Best Consumer TV/Radio Manny Finalist (Ozempic) 2023 Best Launch Campaign…” Source: RevenueBase Database · checked Sep 28, 2026
15	Imatrix	Indirect evidence	United StatesHQ checked Sep 28, 2026	51-200	138 contacts →
	Indirect evidence “iMatrix is the leader in advanced website and digital marketing solutions for small to medium-sized, health and wellness practices.” Source: RevenueBase Database · checked Sep 28, 2026
16	Pacific Communications	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 2026	201-500	133 contacts →
	Partial evidence “For over a quarter century, PACIFIC has been the West Coast beacon for excellence in healthcare marketing and communications.” Source: RevenueBase Database · checked Sep 28, 2026
17	Cardinal Digital Marketing	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 28, 2026	51-200	130 contacts →
	Indirect evidence “Flip your competition the bird, with Cardinal.” Source: RevenueBase Database · checked Sep 28, 2026
18	Marketing Edge Group	Indirect evidence	Hightstown, NJ, United StatesHQ checked Sep 28, 2026	11-50	130 contacts →
	Indirect evidence “the forefront of medical marketing with a backbone in technology MEG is a full-service marketing agency with deep technical and strategic expertise, providing enterprise-grade…” Source: RevenueBase Database · checked Sep 28, 2026
19	Semalt	Partial evidence	Kyiv, UkraineHQ checked Sep 28, 2026	51-200	127 contacts →
	Partial evidence “Semalt is a results-driven, technology-inspired SEO company.” Source: RevenueBase Database · checked Sep 28, 2026
20	Liveworld	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 28, 2026	51-200	126 contacts →
	Indirect evidence “LiveWorld is a Human-Led, AI-Powered intelligence systems company.” Source: RevenueBase Database · checked Sep 28, 2026
21	SEOP	Partial evidence	Irvine, CA, United StatesHQ checked Sep 28, 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 28, 2026
22	Local Splash	Partial evidence	Fountain Valley, CA, United StatesHQ checked Sep 28, 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 28, 2026
23	Hennessey Digital	Partial evidence	North Hollywood, CA, United StatesHQ checked Sep 28, 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 28, 2026
24	Studiohawk	Partial evidence	Melbourne, AustraliaHQ checked Sep 28, 2026	51-200	111 contacts →
	Partial evidence “StudioHawk is Australia’s #1 dedicated SEO & AI Search agency.” Source: RevenueBase Database · checked Sep 28, 2026
25	Grizzly NEW Marketing	Partial evidence	Breda, NetherlandsHQ checked Sep 28, 2026	51-200	109 contacts →
	Partial evidence “Grizzly New Marketing is een gespecialiseerd SEO marketingbureau in Nederland (Breda en Rotterdam), België (Antwerpen-Berchem) en de Verenigde Staten (New York).” Source: RevenueBase Database · checked Sep 28, 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: healthcare SEO agencies. 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 healthcare SEO agencies.
Partial evidence: Its own public description names part of healthcare SEO agencies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name healthcare SEO agencies. 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 9,567 healthcare SEO agencies worldwide

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Healthcare SEO agencies worldwide at a glance

As of Sep 28, 2026

16.5%Verified-email coverage

5.6Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · London

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

7,062

11-50

2,081

51-200

319

201-500

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 healthcare SEO agencies, 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 healthcare SEO agencies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “healthcare SEO agencies”. 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 healthcare SEO agencies), 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 healthcare SEO agencies, 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, 8,833 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 28, 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.

Healthcare SEO agencies by location

40 lists · largest first

Every Healthcare SEO agencies 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 healthcare SEO agencies, 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 healthcare SEO agencies are there worldwide?

RevenueBase identified 9,567 healthcare SEO agencies 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?

Area 23, headquartered in York, tops this list with the largest team on record.

Which country has the most healthcare SEO agencies?

The United States leads with 2,601 companies, followed by India (903) and the United Kingdom (609). Every healthcare SEO agencies list by country and city is linked on this page.

Which city has the most healthcare SEO agencies?

London leads with 180 headquartered companies, followed by New York (99) and Los Angeles (72).

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 8,833 verified decision-maker contacts tracked across these 9,567 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 28, 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.