SEO Used by UK B2B Companies: Market Share (2026)

Updated June 2026

Detected SEO usage across 38,618 of 112,345 trading UK B2B companies, with Yoast SEO at 78.6% of detectable systems.

Among 112,345 trading UK B2B companies, 38,618 have a detectable SEO system. The market is concentrated: Yoast SEO accounts for 78.6% (30,348), followed by RankMath SEO at 11.2% (4,316) and All in One SEO at 8.6% (3,324).

Company size does not change the leader. Yoast SEO is first in Under 10 employees with 79.0% of 25,484 companies, in 10–50 employees with 78.0% of 11,549 companies, and in Over 50 employees with 76.9% of 1,585 companies.

Behind the three largest systems, the tail is small. The SEO Framework has 1.4% (543), SEOmatic 0.9% (352), Google XML Sitemaps 0.2% (95), SEOPlatform.io 0.2% (70), and Spotzer 0.1% (37).

38,618

B2B with detected SEO

Of 112,345 UK B2B

34.4%

Detection rate

2026

Systems detected

In this category

78.6%

Leader share

Yoast SEO

UK B2B SEO market share

Spotzer

Share of the 38,618 UK B2B with a detectable system. As of June 2026.

SEO compared

System	UK B2B	Share	Median headcount	London share	Typical profile
Yoast SEO	30,348	78.6%	6	18.2%	6-person users, 78.6% share
RankMath SEO	4,316	11.2%	7	17.2%	7-person users, 11.2% share
All in One SEO	3,324	8.6%	6	19.8%	6-person users, 8.6% share
The SEO Framework	543	1.4%	6	20.1%	6-person users, 1.4% share
SEOmatic	352	0.9%	6	23.9%	6-person users, 0.9% share
Google XML Sitemaps	95	0.2%	6	10.5%	6-person users, 0.2% share
SEOPlatform.io	70	0.2%	8	11.4%	8-person users, 0.2% share
Spotzer	37	0.1%	—	—	Buy these companies as a spreadsheet →

Systems detected below the page threshold appear with counts only; their full lists are available in the Firmbase app.

Market leader by size

The leading SEO system shifts with company size: among UK B2B with under 10 employees, Yoast SEO leads at 79% of the 25,484 with a detectable system; among UK B2B with 10–50 employees, Yoast SEO leads at 78% of the 11,549 with a detectable system; and among UK B2B with over 50 employees, Yoast SEO leads at 76.9% of the 1,585 with a detectable system.

Under 10 employees

Yoast SEO

79% of band

Under 10 employees is the largest detected band, with 25,484 companies. Yoast SEO accounts for 79.0%, leaving the remaining share to RankMath SEO, All in One SEO and smaller systems.

10–50 employees

Yoast SEO

78% of band

10–50 employees contains 11,549 companies and has a similar shape to the smallest band. Yoast SEO holds 78.0%, with RankMath SEO and All in One SEO the main named alternatives overall.

Over 50 employees

Yoast SEO

76.9% of band

Over 50 employees is smaller at 1,585 companies, and Yoast SEO still leads with 76.9%. The lower leader share leaves more room for the other named systems, although no rival is identified as the band leader.

How SEO usage is detected

Methodology

Company data

Detected companies are joined to UK Companies House records and XBRL accounts data. Revenue and headcount figures come from the most recent filed accounts; where the company has not filed, values are estimated using a model trained on filed history and peer benchmarks and are labelled as estimates.

Detection

Firmbase crawls the public website of actively-trading UK companies and fingerprints the technologies present: tracking scripts, embedded forms, chat widgets, CMS markers and similar signatures. A company is included in this list when one or more of the technology's signatures are found on its site; closely-related variants of the same product are grouped under one name. Detection covers what is visible on the public web — a company using the technology purely internally, with no website footprint, will not appear. Counts are therefore a conservative floor, not a ceiling.

Freshness

Websites are re-crawled on a rolling basis and the underlying company data is refreshed from Companies House continuously; filings appear within days of submission. The list and its statistics are regenerated when the detected cohort moves meaningfully. You can see the last-updated timestamp near the top of the page.

Sources

All product names are trademarks of their respective owners. Firmbase is not affiliated with, sponsored by, or endorsed by any trademark owner.

UK B2B by SEO

B2B Companies Using Yoast SEO in the UK B2B Companies Using RankMath SEO in the UK B2B Companies Using All in One SEO in the UK B2B Companies Using The SEO Framework in the UK B2B Companies Using SEOmatic in the UK B2B Companies Using Google XML Sitemaps in the UK B2B Companies Using SEOPlatform.io in the UK

Related directories

CMS Used by UK B2B Companies: Market Share (2026)Most-Used SEO by UK Companies (2026)Analytics Used by UK B2B Companies: Market Share (2026)Security Used by UK B2B Companies: Market Share (2026)Page builders Used by UK B2B Companies: Market Share (2026)B2B in the UK

Frequently asked questions

What is the most-used SEO among UK B2B companies?

Yoast SEO is the most-detected SEO among UK B2B companies, with 78.6% share (30,348 of 38,618 companies with a detectable system), ahead of RankMath SEO (11.2%) and All in One SEO (8.6%).

How many UK B2B companies have a detectable SEO?

38,618 of 112,345 actively-trading UK B2B companies (34.4%) have a SEO detectable from their public website. The remainder either run systems with no public web footprint or none at all, so detected share figures are a conservative floor.

What is a SEO?

An SEO system manages the search-facing parts of a company website, such as page metadata, sitemaps, indexation controls and on-page optimisation settings. For UK B2B companies, its job is to help service, product and content pages be understood by search engines and maintained without editing every page by hand.

How is SEO usage detected?

Firmbase crawls the public website of every actively-trading company in this scope and fingerprints the technologies present — scripts, widgets, booking and checkout flows. A company is attributed to a system when that system's signatures are found; systems with no public web footprint are not attributable, which is why every share figure on this page means share of companies with a detectable system.

Which has more UK B2B companies, Yoast SEO or RankMath SEO?

Yoast SEO: 30,348 detected companies versus 4,316 for RankMath SEO, of the 38,618 UK B2B companies with a detectable SEO.

What is the best SEO for UK B2B companies?

Observed usage counts are reported here rather than recommendations. Yoast SEO is the usage leader in all three size bands: 79.0% of 25,484 companies under 10 employees, 78.0% of 11,549 companies with 10–50 employees, and 76.9% of 1,585 companies over 50 employees. Across all 38,618 detected companies, the next largest systems are RankMath SEO at 11.2% (4,316) and All in One SEO at 8.6% (3,324).

Buy all 38,618 companies as a spreadsheet.

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