Company lists · Data refreshed September 2026
Top 25 SEO tool vendors worldwide
RevenueBase identified 3,784 SEO tool vendors worldwide as of September 2026 and tracks 58,085 professional contacts across them, including 4,195 with verified work emails. The United States is the largest market and London the largest hub.
This list covers SEO tool vendors 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 22, 2026. Country and city lists for SEO tool vendors 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.
The 25 largest SEO tool vendors worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 2,234 contacts → | ||||
Indirect evidence “Semrush, An Adobe Company, is the leading digital brand visibility platform, empowering marketers to command their online presence and create measurable impact.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 589 contacts → | ||||
Indirect 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 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 219 contacts → | ||||
Partial 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 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 134 contacts → | ||||
Partial 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 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 127 contacts → | ||||
Partial evidence “Semalt is a results-driven, technology-inspired SEO company.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 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 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 118 contacts → | ||||
Indirect evidence “Leave Code offers you the best digital marketing services for your products and services.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 108 contacts → | ||||
Partial evidence “En nuestra agencia SEO en Barcelona somos unos apasionados del posicionamiento web.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 106 contacts → | ||||
Partial evidence “awoo Intelligence AI AI SEO AI SEO AI AI Marketing PlatformAI GEOGenerative Engine Optimization AI awoo AI AI Agent IDC Fashion EC Awards Plug and Play Japan SparkLabs Taiwan awoo…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 105 contacts → | ||||
Partial evidence “SEOmoz is the world’s most popular provider of SEO software.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 98 contacts → | ||||
Partial evidence “Dịch vụ Seo của Công ty GTV SEO giúp các doanh nghiệp không chỉ có thêm nhiều khách hàng và lợi nhuận hàng tháng mà còn giúp cho các doanh nghiệp xây dựng thương hiệu và chỗ đứng…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 89 contacts → | ||||
Partial evidence “SeoProfy is your strategic SEO and AI visibility partner for organic and AI visibility that brings real ROI.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 88 contacts → | ||||
Indirect evidence “Who are we?” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 79 contacts → | ||||
Indirect evidence “Serpstat is the go-to platform to speed up search marketing goals achievement.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 77 contacts → | ||||
Indirect evidence “At MediaVision, we believe there's potential hidden in every search.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 74 contacts → | ||||
Partial evidence “Agreed Technologies utilizes top marketing tools to get you results.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 72 contacts → | ||||
Partial evidence “Why SEO Serious is an organic marketing agency.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 72 contacts → | ||||
Indirect evidence “SEOValley is one of the most trusted and fastest growing interactive marketing companies serving small to medium size companies worldwide.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 70 contacts → | ||||
Partial evidence “As an expert Digital Marketing, SEO and Web Design Company, we put your business first, exactly where it should be.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 69 contacts → | ||||
Partial evidence “seoClarity is an enterprise search intelligence platform that merges SEO and AI search optimization to keep global brands visible across a fragmented search landscape.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
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 tool vendors. 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 tool vendors.
- Partial evidence
- Its own public description names part of SEO tool vendors, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name SEO tool vendors. 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 3,784 SEO tool vendors worldwide
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SEO tool vendors worldwide at a glance
As of Sep 22, 2026Companies by employee count
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 tool vendors, 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 tool vendors are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “SEO tool vendors”. 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 tool vendors), 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 tool vendors, 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, 4,195 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 22, 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 tool vendors by location
12 lists · largest firstEvery SEO tool vendors list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- SEO tool vendors based in the United States823
- SEO tool vendors based in India354
- SEO tool vendors based in the United Kingdom216
- SEO tool vendors based in France168
- SEO tool vendors based in Germany113
- SEO tool vendors based in Canada89
- SEO tool vendors based in Australia78
- SEO tool vendors based in the Netherlands75
- SEO tool vendors based in Spain70
- SEO tool vendors based in Poland58
- SEO tool vendors based in Italy34
- SEO tool vendors based in Israel33
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 tool vendors, 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 tool vendors are there worldwide?
RevenueBase identified 3,784 SEO tool vendors 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?
Semrush, headquartered in Boston, tops this list with the largest team on record.
Which country has the most SEO tool vendors?
The United States leads with 823 companies, followed by India (354) and the United Kingdom (216). Every SEO tool vendors list by country and city is linked on this page.
Which city has the most SEO tool vendors?
London leads with 73 headquartered companies, followed by New York (44) and Paris (41).
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 4,195 verified decision-maker contacts tracked across these 3,784 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 22, 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.