Company lists · Data refreshed September 2026

Top 25 SEO and content optimization software companies worldwide

Name: SEO and content optimization software companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 12,112 companies tracked

RevenueBase identified 12,112 SEO and content optimization software companies worldwide as of September 2026 and tracks 96,824 professional contacts across them, including 8,486 with verified work emails. The United States is the largest market and London the largest hub.

This list covers SEO and content optimization software companies 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 and content optimization software companies 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

12,112Companies

96,824Contacts tracked

8,486Verified emails

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The 25 largest SEO and content optimization software companies worldwide

Ranked by team size

Top 25 of 12,112 SEO and content optimization software companies worldwide, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to SEO and content optimization software companies: 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 29, 2026	n/a	825 contacts →
	Partial evidence “Since its inception in 1997, SEO Inc.” Source: RevenueBase Database · checked Sep 29, 2026
2	Wildnet Technologies	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 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 29, 2026
3	Conductor	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	201-500	589 contacts →
	Partial evidence “At Conductor, we’re on a mission to help companies realize the full potential of their AI search presence and translate their wisdom into content that helps people.” Source: RevenueBase Database · checked Sep 29, 2026
4	Clickout Media	Strong evidence	Naxxar, MaltaHQ checked Sep 29, 2026	201-500	463 contacts →
	Strong 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 29, 2026
5	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
6	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
7	MOZ	Strong evidence	Vancouver, BC, CanadaHQ checked Sep 29, 2026	51-200	219 contacts →
	Strong evidence “Marketing Analytics Software for SEO, Links, and Brand • A Vibrant Online Marketing Community • Resources for Learning Inbound Marketing Moz develops inbound marketing software…” Source: RevenueBase Database · checked Sep 29, 2026
8	Whitepress	Strong evidence	Bielsko-biała, PolandHQ checked Sep 29, 2026	201-500	209 contacts →
	Strong evidence “WhitePress® supports SEO and content marketing activities by providing an automated platform that allows you to publish articles in thousands of portals worldwide.” Source: RevenueBase Database · checked Sep 29, 2026
9	auroin.com	Partial evidence	New York, NY, United StatesHQ checked Sep 29, 2026	51-200	183 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 29, 2026
10	Ahrefs	Indirect evidence	SingaporeHQ checked Sep 29, 2026	51-200	174 contacts →
	Indirect evidence “Ahrefs is the marketing platform built to keep your brand discoverable across search, AI, and the web.” Source: RevenueBase Database · checked Sep 29, 2026
11	Brightlocal	Strong evidence	Brighton And Hove, United KingdomHQ checked Sep 29, 2026	51-200	173 contacts →
	Strong evidence “BrightLocal offers local SEO software and services that help businesses get found, chosen, and trusted in their local area.” Source: RevenueBase Database · checked Sep 29, 2026
12	WP SEO AI	Indirect evidence	Amsterdam, NetherlandsHQ checked Sep 29, 2026	51-200	166 contacts →
	Indirect evidence “Even before AI-powered Search and platforms like ChatGPT or Perplexity started reshaping how people search, we anticipated the shift in user behaviour.” Source: RevenueBase Database · checked Sep 29, 2026
13	Liveseo	Strong evidence	Maringá, BrazilHQ checked Sep 29, 2026	51-200	141 contacts →
	Strong 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
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	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
16	Activant Solutions PVT Ltd, Jaipur	Indirect evidence	Jaipur, IndiaHQ checked Sep 29, 2026	51-200	125 contacts →
	Indirect evidence “With more than 15 years in business and a highly experienced and professional team of more than 100 team members; Activant Solutions Private Limited, founded in 2005 by the…” Source: RevenueBase Database · checked Sep 29, 2026
17	Search Engine Journal	Strong evidence	Boca Raton, FL, United StatesHQ checked Sep 29, 2026	11-50	122 contacts →
	Strong evidence “We are SEO professionals, content writers, and marketers, just like you.” Source: RevenueBase Database · checked Sep 29, 2026
18	SEOP	Strong evidence	Irvine, CA, United StatesHQ checked Sep 29, 2026	51-200	121 contacts →
	Strong 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
19	Leavecode Technologies	Indirect evidence	Bijnor, IndiaHQ checked Sep 29, 2026	51-200	118 contacts →
	Indirect evidence “Leave Code offers you the best digital marketing services for your products and services.” Source: RevenueBase Database · checked Sep 29, 2026
20	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
21	CGS Infotech Solutions	Indirect evidence	Tampa, FL, United StatesHQ checked Sep 29, 2026	501-1,000	115 contacts →
	Indirect evidence “CGS Infotech is a global Information Technology & Media company serving over thousand customers in 40 countries since 1995.” Source: RevenueBase Database · checked Sep 29, 2026
22	compose.ly	Strong evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	115 contacts →
	Strong evidence “Compose.ly is a content marketing and seo agency that helps brands like WebMD, Calendly, Money.com, TED, and Get Your Guide turn organic content into measurable growth across…” Source: RevenueBase Database · checked Sep 29, 2026
23	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
24	Growthx AI	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 29, 2026	51-200	111 contacts →
	Indirect evidence “The first sales call now happens inside an AI answer.” Source: RevenueBase Database · checked Sep 29, 2026
25	Studiohawk	Partial evidence	Melbourne, AustraliaHQ checked Sep 29, 2026	51-200	111 contacts →
	Partial evidence “StudioHawk is Australia’s #1 dedicated SEO & AI Search agency.” 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 and content optimization software companies. 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 and content optimization software companies.
Partial evidence: Its own public description names part of SEO and content optimization software companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SEO and content optimization software companies. 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 12,112 SEO and content optimization software companies worldwide

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SEO and content optimization software companies worldwide at a glance

As of Sep 29, 2026

8.8%Verified-email coverage

8.0Average contacts per company

1-10Median size (employees)

2.1%Largest-city concentration · London

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

8,856

11-50

2,623

51-200

469

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 SEO and content optimization software companies, 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 and content optimization software companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “SEO and content optimization software companies”. 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 and content optimization software companies), 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 and content optimization software companies, 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, 8,486 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 and content optimization software companies by location

48 lists · largest first

Every SEO and content optimization software companies 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 and content optimization software companies, 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 and content optimization software companies are there worldwide?

RevenueBase identified 12,112 SEO and content optimization software companies 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 SEO and content optimization software companies?

The United States leads with 2,387 companies, followed by India (1,377) and the United Kingdom (804). Every SEO and content optimization software companies list by country and city is linked on this page.

Which city has the most SEO and content optimization software companies?

London leads with 254 headquartered companies, followed by New Delhi (121) and New York (112).

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 8,486 verified decision-maker contacts tracked across these 12,112 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.