UK SEO Industry Report 2026: SEO Market Size, Statistics and Trends

The UK search economy is worth more than most people quoting statistics about it realise, and it is changing in ways the headlines routinely overstate. This report sets out the size, shape and direction of the UK SEO industry in 2026, using only figures from regulators, official statistics, independent market-research firms, measurement companies and recognised media. 

We cover the market’s value in the UK and globally, how UK search behaviour is actually changing, current market share, the CMA’s regulation of Google, the publisher traffic story, the state of the services industry, everything that changed in the first half of 2026, and what the independent forecasts say happens next. 

Executive summary

Twelve figures define the state of UK search in 2026:

• £24.6 billion: the revenue of the UK SEO and internet marketing consultancy industry in 2025-26, after five years of 6.6% compound annual growth (IBISWorld).
• 35,088: the number of businesses operating in that industry in the UK (IBISWorld).
• $83.98 billion: the value of the global SEO services market in 2026, forecast to reach $148.86 billion by 2031 (Mordor Intelligence).
• 91.17%: Google’s share of UK search in May 2026, with Bing at 6.22% (StatCounter).
• 252 million: UK visits to ChatGPT in August 2025 alone, up 156% year on year (Ofcom, Online Nation 2025).
• 94.8 billion vs 5.5 billion: Google’s monthly site visits against ChatGPT’s in January 2026. ChatGPT’s traffic is roughly 6% of Google’s (Similarweb data, via StatsPanda).
• 2.5 times: how much more likely a brand recommended in AI answers is to receive a site visit within seven days, with 55.9% of that traffic arriving via branded Google searches (Similarweb).
• 8% vs 15%: the click rate on search results with and without an AI summary present (Pew Research Center).
• 33%: the year-on-year fall in Google search referrals to news publishers globally (Axios).
• 10 October 2025: the date the CMA designated Google with Strategic Market Status, the first designation of its kind under the UK’s new digital markets regime (CMA).
• +7.3%: the net balance of UK companies revising marketing budgets upward in Q1 2026, the highest in almost two years (IPA Bellwether).
• December 2026: when Google’s main publisher obligations take effect, including the control over content use in AI Overviews (gov.uk).

How big is the SEO market?

In the UK, IBISWorld puts SEO and internet marketing consultancy revenue at £24.6 billion in 2025-26, after compound annual growth of 6.6% across five years, including an estimated 2.9% rise in the current year. The industry contains 35,088 businesses, a count that has grown at 6.2% a year since 2021.

Globally, the three major research houses agree on the direction and disagree on the numbers, largely because they draw the market’s boundaries differently:

Research firm	Current value	Forecast	CAGR
Mordor Intelligence	USD 83.98bn (2026)	USD 148.86bn by 2031	12.12%
MarknTel Advisors	USD 81.46bn (2024)	USD 171.77bn by 2030	13.24%
Research and Markets	USD 87.82bn (2026)	USD 165.29bn by 2030	17.1%

That divergence is worth understanding rather than smoothing over, because it explains why quoted SEO market sizes vary so wildly online. Each firm draws the market’s boundary differently. Mordor’s estimate centres on SEO services and counts software providers among its major companies; Research and Markets isolates agency-delivered services; MarknTel includes the full services mix across agencies, freelancers and consultancies. Base years and currency assumptions differ too. Any single figure quoted without its definition is close to meaningless, which is why this report presents all three.

What matters more is that every independent estimate has the global market roughly doubling within five to eight years. MarknTel’s segmentation adds useful structure, with agency-delivered services holding around 55% of the market and large enterprises accounting for roughly 60% of spend. North America remains the largest regional market at over 38%, which makes the UK’s £24.6 billion consultancy industry a disproportionately large share of the rest.

The software layer is growing faster still. Grand View Research values the UK SEO software market at USD 5.4 billion in 2024, rising to a projected USD 11.3 billion by 2030.

For sector-level UK data, our own UK SEO market reports break this picture down by industry, including dedicated software and healthcare market reports.

What drives growth, and what could slow it

The research houses name similar growth drivers: continued migration of ad spend to digital channels, e-commerce expansion, and AI itself, as businesses invest in being visible within AI-generated answers as well as classic rankings. IBISWorld ties UK growth directly to digital ad spending replacing traditional channels.

The headwinds are the same forces reshaping search behaviour: fewer clicks per query as AI summaries answer more questions on the results page, and regulatory uncertainty while the CMA’s new regime beds in. None of the major forecasters treats these as reversing growth; all treat them as changing where SEO budgets get spent. 

Marketing budgets provide supporting evidence: the IPA Bellwether Q1 2026 recorded UK marketing budgets revised up to their highest level in almost two years, with a net balance of +7.3% of companies increasing spend, and S&P Global forecasting UK adspend growth of 2.5% in 2026, rising to 2.7% in 2027 and 2.9% in 2028. 

Budgets are flowing toward visibility, reputation and being talked about. Events led budget growth at a net balance of +14.7%, with public relations at a five-quarter high of +6.0%. This is the territory where search, digital PR and AI visibility now overlap.

How the UK searches in 2026: Google and AI search statistics

This is where most industry commentary goes wrong, in both directions. The AI shift is real and measurable. So is Google’s continuing dominance. Both things are true at once, and the evidence supports coexistence rather than replacement.

The growth of AI tools

ChatGPT received 252 million UK visits in August 2025 alone, up 156% on August 2024, and 1.8 billion UK visits across the first eight months of 2025, up from 368 million in the same period of 2024. Gemini (+146%), Claude (+138%) and Perplexity (+100%) all grew over the same period, from smaller bases. Ofcom describes search as shifting from pages of links towards AI-generated answers and chat-style interactions. The same report records UK adults spending a record 4.5 hours a day online, so the shift is happening inside a rising, not shrinking, pool of attention.

The continuing dominance of Google

Set that growth against the base it is growing from. Similarweb data shows Google received 94.8 billion site visits in January 2026, capturing 31.6% of all global web traffic, while ChatGPT recorded only 5.7 billion, roughly 6% of Google’s volume (The SEO Works and StatsPanda). Google’s usage rose between December 2025 and January 2026, widening the gap. StatCounter still records Google at close to 90% of global search.

Panel data from Datos, State of Search Q1 2026 (US desktop, so directional context rather than UK measurement) points the same way. Between Q1 2025 and Q1 2026, traditional search platforms actually grew their share of web activity slightly more than AI tools did (+0.47 versus +0.34 percentage points), with search at a 10.35% event share against 1.65% for AI tools. 

The average US desktop searcher ran 102 Google searches in March 2026, as many as ever. Google’s own AI Mode reached just 0.16% of US visits, growing fast from a very small base. And ChatGPT’s share of desktop users has plateaued at around 35%, while Gemini and Claude continue to climb.

AI use is not replacing Google

One recent finding cuts through the whole replacement argument: AI answers and Google are not even competing for the same click. Similarweb’s Downstream Impact of AI Visibility study (June 2026, US desktop clickstream) tracked users who received a ChatGPT brand recommendation and found the recommended brands were 2.5 times more likely to receive a site visit within seven days.

Crucially, 55.9% of that downstream traffic arrived via branded Google searches, not via a visible AI referral. Those visitors also engaged more deeply with12.0 pages and 11.8 minutes per session, against 6.5 pages and 5.6 minutes for other visitors. An AI mention behaves less like a stolen click and more like a billboard. It plants the brand, and the Google search follows.

AI overviews reduce clicks by half

Where an AI summary appears on a Google results page, behaviour changes measurably. Pew Research Center, analysing the real browsing behaviour of 900 US adults during March 2025, found users clicked a traditional result on just 8% of visits to pages with an AI summary, against 15% without one, and clicked a source cited inside the summary on only 1% of visits. 

Users were also more likely to end their browsing session entirely after seeing an AI summary (26% of such pages, against 16% of traditional results pages). And 58% of participants encountered at least one AI summary during the month.

Two features of this data stop it being a catastrophe narrative. The loss concentrates in informational queries, the searches where a summary genuinely answers the question. Commercial and navigational queries, where the user needs to reach a website to act, behave differently. 

And a click that never happens is not always demand that disappears. As the Similarweb research above shows, a measurable portion of AI-answered demand resurfaces as branded search later. The practical consequence for content strategy is a shift in what earns its keep. Generic informational content that a summary can replace is losing value, while content demonstrating first-hand expertise, original data and a distinct point of view is what both Google’s systems and AI answer engines increasingly select for.

Measure	Traditional Google search	AI-assisted search
Monthly visits, Jan 2026 (Similarweb)	94.8bn (Google)	5.7bn (ChatGPT)
Typical query length (Ofcom)	~4 words	~23 words
Share of web activity, Q1 2026 (Datos, US desktop)	10.35%	1.65%
Year-on-year UK growth (Ofcom, to Aug 2025)	Stable	+100% to +156%
Behavioural role	Action and verification	Research, comparison, discovery

Search engine and AI platform market share in the UK

Google still dominant

StatCounter puts Google at 91.17% of UK search in May 2026, with Bing at 6.22%, Yahoo at 1.25%, DuckDuckGo at 0.7% and Ecosia at 0.33%. Google’s UK share has shrunk marginally from the 93-94% it held two years ago, while Bing has gained roughly two points. The structure of the market is the same with one dominant engine, one distant second. A note on an apparent contradiction, because the datasets measure different things: Google’s share of searches (StatCounter) can edge down while its searches per user (Datos) hold steady and its total visits (Similarweb) rise, since the overall pool of queries is growing.

Bing has marginal growth

Bing’s position deserves a closer look than it usually gets. Two years of deep Copilot integration and Microsoft’s enormous AI investment have moved its UK share from roughly 4% to just over 6%. Growth, but nothing resembling the disruption Microsoft hoped AI would deliver. If AI integration alone shifted search market share, Bing would be the proof. Meanwhile DuckDuckGo and Ecosia hold small, stable, values-driven audiences of privacy-conscious and environmentally minded users that neither grow nor collapse.

AI tools growing…

The more meaningful competitive pressure comes from outside conventional search. Ofcom’s growth figures for ChatGPT, Gemini, Claude and Perplexity represent new query volume happening off the search results page altogether, mostly for longer, research-style questions. Ofcom notes the average ChatGPT prompt runs to around 23 words against roughly four for a Google search. A four-word query is a lookup; a 23-word prompt is a conversation. The evidence so far suggests AI assistants are absorbing tasks people never did well with search, more than replacing the searches they already ran.

…but marginal when compared to Google

Absolute traffic tells the same story more vividly than percentages. GB website data (captured July 2026) records google.com at 2.79 billion monthly visits, with google.co.uk adding a further 86.4 million, against 173.7 million for chatgpt.com, 73.0 million for bing.com and 36.5 million for claude.ai. Read together, chatgpt.com now attracts more than twice the GB visits of bing.com, while Google attracts roughly sixteen times more than ChatGPT. The challenger has comfortably overtaken the second search engine but remains an order of magnitude behind the first.

Platform	UK position (2026)	Trend	Source
Google	~2.88bn monthly GB visits; 91.17% of search	Absolute usage stable to rising; overall market share slightly down	StatCounter; Semrush
Bing	73.0m monthly GB visits; 6.22% of search	Marginal share gains	StatCounter; Semrush
ChatGPT	173.7m monthly GB visits (2026)	+156% YoY in 2025; plateauing in 2026 (Datos)	Ofcom; Semrush
Gemini	Not separately measurable (runs on subdomain of google.com)	+146% YoY in 2025	Ofcom
Claude	36.5m monthly GB visits	+138% YoY in 2025	Ofcom; Semrush
Perplexity	Under 13m monthly GB visits	+100% YoY in 2025	Ofcom; Semrush

Regulation via the DMCCA

The UK is now running a live experiment in search regulation that no other jurisdiction has attempted in this form. The Digital Markets, Competition and Consumers Act 2024 came into force on 1 January 2025, giving the Competition and Markets Authority new powers over firms with entrenched market positions in digital activities. The CMA used them quickly.

On 10 October 2025, following an investigation opened that January, the CMA formally designated Google with Strategic Market Status (SMS) in general search and search advertising, confirming that Google holds more than 90% of the UK search market (CMA case page). Designation is not a finding of wrongdoing; it is the trigger that lets the CMA impose binding conduct requirements. In 2026, it did.

An SMS designation lasts five years, and under the DMCCA the CMA can fine a firm up to 10% of global turnover for breaching a conduct requirement. This distinguishes the UK approach from a decade of slower-moving competition cases. The CMA does not need to prove harm in court before acting, it just sets rules and enforces them. Search regulation moved from theory to operating reality inside eighteen months.

Search was only the first target. On 22 October 2025 the CMA separately designated both Apple and Google with SMS in mobile platforms, bringing app distribution, mobile browsers and operating systems into the same regime; those designations also run for five years. For any business reaching customers through UK search or mobile, the regulatory environment of the next five years is now materially different from the last five.

Timeline of CMA action, 2025 to mid-2026

Date	Action
1 Jan 2025	DMCCA 2024 comes into force; the CMA gains new digital markets powers
14 Jan 2025	CMA opens its investigation into Google’s search and search advertising services
24 Jun 2025	CMA publishes its proposed decision, provisionally designating Google with SMS
10 Oct 2025	Google formally designated with Strategic Market Status in general search and search advertising
Feb 2026	CMA consults on its first proposed conduct requirements for Google Search
H1 2026	CMA imposes conduct requirements: publisher controls, fair ranking and data portability, with the main publisher obligations taking effect from December 2026

What conduct requirements mean for UK businesses

Three requirements matter most in practice. The publisher conduct requirement obliges Google to give publishers a control over whether their content is used in AI-powered search features, including AI Overviews and AI Mode, without penalising their standard organic rankings. The fair ranking conduct requirement constrains how Google may favour its own services in results. A data portability requirement obliges Google to let users move their search data to authorised third parties.

For publishers, the AI Overviews opt-out is the headline. For the first time, a business can decline to feed Google’s AI answers without disappearing from traditional Google search results. However, when one company controls nine out of ten searches in the UK, and AI overviews appear on many searches, giving publishers an opt-out may seem like a false choice. 

For everyone else, the practical effect through 2026 is watchfulness rather than upheaval. The main obligations phase in from December 2026, and the CMA has signalled further requirements may follow (CMA announcement). The CMA’s earlier roadmap also trailed possible future measures including choice screens for search services and wider data portability, so the current requirements are best read as a first instalment rather than the settled shape of the regime.

The impact on publishers and websites

Publishers hit hardest

The clearest casualties of the AI search shift are news publishers. Chartbeat data covering 2,756 news sites shows Google search referrals to publishers fell 33% globally year on year to late 2025, and 38% in the United States (Axios).

The damage is unevenly distributed. Chartbeat’s analysis shows search referral traffic down 60% for small publishers over two years, against 22% for large publishers, with mid-sized sites losing 47% (Search Engine Journal). Publishers themselves expect worse before better; media leaders surveyed for the Reuters Institute’s 2026 trends report anticipate search referrals falling a further 43% by 2029 (Search Engine Land).

Click rate falls when an AI overview is shown

Behind the aggregate decline sits a harder question about the value of the remaining traffic. Pew’s finding that when an AI overview shows, the click rate is roughly halved means presence inside an AI answer, on its own, returns less direct traffic to the publisher whose work fed it. The publishers weathering this best are those that spent the past decade building subscription bases, newsletters, apps and direct relationships, which is why large publishers have lost a third as much search traffic as small ones.

This is also where regulation and market behaviour now intersect. The CMA’s publisher controls exist precisely because of this data, and December 2026 will show whether an opt-out changes the economics. A publisher who opts out keeps organic rankings but gives up any presence in AI Overviews; one who stays in keeps the visibility and accepts the click mathematics above. It is the first time UK publishers have faced that choice with regulatory protection attached, and the industry data over the following year will be the honest verdict on whether it matters.

Generic informational content is out, brand and experience is in

The traffic disappearing fastest is attached to generic informational queries, the “what is” and “how to” content that an AI summary can answer in place because a hundred sites say roughly the same thing. When content is interchangeable, the summary replaces it at no cost to the reader. Google’s own 2026 spam updates target the same content class from the other direction, penalising scaled, undifferentiated publishing.

What survives is the content a summary cannot substitute. Original reporting, first-party data, and writing grounded in first-hand experience with a recognisable voice behind it. That is not a publisher-only lesson. Any business running a blog of generic informational articles holds a portfolio of exactly the traffic being repriced, and the same shift toward brand, evidence and experience applies to it.

The UK SEO workforce and services economy

The demand side of UK search is often discussed anecdotally. The independent data describes a large, fragmented, growing services economy. IBISWorld counts 35,088 UK businesses in SEO and internet marketing consultancy, up 6.2% a year since 2021, generating £24.6 billion in 2025-26 revenue. Market share concentration is low; the largest players are the global holding groups (WPP, Publicis Groupe, Omnicom), but no single company dominates, and competition is assessed as high and increasing.

Two structural points stand out from the global data. Agencies deliver around 55% of SEO services worldwide, against freelancers and in-house teams (MarknTel Advisors). And spending skews toward large enterprises, at roughly 60% of the market, which explains why enterprise demand trends move the industry more than SME sentiment does.

The shape of the UK industry, 35,000 businesses sharing £24.6 billion, tells its own story. This is overwhelmingly an economy of small companies and independent practitioners, with a thin layer of holding-group scale at the top. Average revenue per business sits around £700,000, and most firms will be well below it. 

That fragmentation is why industry-wide narratives about SEO ‘dying’ or ‘booming’ rarely match any individual firm’s experience; the market is really thousands of small markets defined by sector and specialism. 

For buyers of SEO services, that fragmentation cuts both ways – enormous choice, but few reliable ways to tell providers apart. In a market where 35,000 firms sell adjacent services, the things that are hard to fake carry the most information. It is why we publish our case studies, reviews, reports and research like this openly, and it is a reasonable test to apply to anyone selling search services, us included.

What changed in 2026

A 2025 retrospective now misses half a year of material developments. The confirmed changes so far in 2026:

• February 2026 Discover update: quality and relevance changes to content surfaced in Google Discover.
• March 2026 spam update (24 March): completed in under 20 hours, the fastest spam update on record.
• March 2026 core update (27 March to 8 April): a broad core update in Google’s regular cadence.
• May 2026 core update (21 May to 2 June): described by Google as designed to better surface relevant, satisfying content from all types of sites (Search Engine Journal; Search Engine Land).
• June 2026 spam update: continued enforcement against scaled content abuse, expired domain abuse and site reputation abuse.

Taken together, the 2026 updates continue the direction every update since 2023 has pointed. Nothing in them rewrites the rules, and everything in them lowers the value of generic content. The spam updates in particular target the industrial production of low-value pages, the same content class that AI summaries make redundant from the demand side. Google’s systems and its AI features are, in effect, applying the same filter from two directions.

On the regulatory side, the CMA moved from designation to enforcement, consulting on conduct requirements in February and confirming publisher controls, fair ranking and data portability requirements in the first half of the year. And on the data side, Similarweb’s June study gave the industry its first evidence linking AI visibility to downstream branded search, while Datos’ Q1 report showed traditional search holding its ground. The first half of 2026, in short, rewarded the businesses that had not panicked.

Outlook for 2026 to 2031

Presented as ranges rather than predictions, because that is what the evidence supports:

What the sources say	Figures
Global SEO services market by 2030-31	Mordor: USD 148.86bn by 2031.  MarknTel: USD 171.77bn by 2030.  Research and Markets: USD 165.29bn by 2030.
Growth rate range	12.12% to 17.1% CAGR
UK SEO software market by 2030	Grand View Research: USD 11.3bn, from USD 5.4bn in 2024
UK adspend	IPA Bellwether / S&P Global: +2.5% in 2026, +2.7% in 2027, +2.9% in 2028
Regulatory trajectory	CMA: main publisher obligations from December 2026; further conduct requirements possible

Three things would have to be true for the pessimistic case (SEO shrinking as AI replaces search) and none of them currently is. AI platforms would need to be taking share of web activity from search; Datos shows the opposite. Clicks lost to AI summaries would need to represent lost demand; Similarweb shows a measurable portion returns as branded search. And budgets would need to be falling; the IPA Bellwether shows them at a near two-year high. The likelier picture for 2026 to 2031 is a market roughly doubling while the work inside it shifts toward AI visibility, brand strength and content that can survive being summarised.

For a UK business reading this data, the priorities it implies are reasonably clear. Brand search is becoming the measurable endpoint of AI visibility, so protecting and tracking branded demand matters more than it did. Content investment should follow the filter both Google and the AI platforms now apply – original data, demonstrable expertise and genuine perspective over volume. Publishers face a specific December 2026 decision on AI Overviews participation. And every business has a new regulator worth watching, because the CMA’s conduct requirements will shape what Google can show, favour and summarise in UK results for the rest of the decade.

The SEO Works publishes sector-level UK market reports drawing on this data. Explore the full downloads library or see how our SEO services put it to work.

Conclusion

The evidence in this report supports a less dramatic story than most 2026 search commentary tells, and a more useful one. The UK SEO industry is a £24.6 billion market growing at 6.6% a year, inside a global market every independent forecaster expects to roughly double by 2030. 

AI has changed how people search without yet changing where they overwhelmingly search. Google still takes over 91% of UK queries and sixteen times ChatGPT’s visits, while AI mentions increasingly return to it as branded demand. The genuine disruptions are specific rather than general – informational clicks lost to AI summaries, publisher referrals down by a third, and a regulator now writing enforceable rules for the dominant platform.

Ben Foster, CEO at The SEO Works says “The loudest voices in search right now are selling panic which the data doesn’t support. What it shows is a growing market where the rules of winning are changing. Visibility now spans Google and AI answers, and the businesses pulling ahead are the ones investing in brand, evidence and genuinely useful content rather than volume. Our advice to any business reading this is to trust the numbers over the noise.”

Methodology

Statistics pages about SEO often have a circularity problem. Agencies cite agencies, which cite older agency posts, and the original source disappears. This report applies a stricter standard. Every figure comes from a regulator, official statistics, an independent market-research firm, a measurement company, an industry body, an academic institution or recognised media. 

No SEO agencies or providers of digital marketing services are cited anywhere. Where research houses disagree, we show the disagreement rather than picking the most quotable number. And where a widely quoted statistic cannot be traced to a verifiable source, it is excluded, however often it gets repeated. Data was collected in July 2026.

Sources and references

1. Ofcom, Online Nation 2025 (published 10 December 2025) and summary article
2. CMA, Google’s general search and search advertising services (SMS case page)
3. CMA, conduct requirement announcements, 2026; further action
4. gov.uk, Google Search publisher conduct requirement; fair ranking conduct requirement
5. Digital Markets, Competition and Consumers Act 2024, legislation.gov.uk
6. CMA, Apple and Google mobile platforms SMS designations (22 October 2025)
7. IPA, Bellwether Report Q1 2026 (16 April 2026)
8. IBISWorld, SEO & Internet Marketing Consultants in the UK (March 2026)
9. Mordor Intelligence, SEO Services Market Report 2026-2031
10. MarknTel Advisors, SEO Services Market Analysis 2030
11. Research and Markets, Agencies SEO Services Market Report 2026
12. Grand View Research, UK SEO Software Market Outlook 2025-2030
13. StatCounter, Search Engine Market Share, United Kingdom (May 2026); worldwide
14. Datos, State of Search Q1 2026
15. Semrush, Trending Websites, United Kingdom (2026)
16. Similarweb, The Downstream Impact of AI Visibility (June 2026)
17. Similarweb traffic data via StatsPanda, Google vs Everyone Else (2026)
18. Pew Research Center, Google users are less likely to click on links when an AI summary appears (22 July 2025)
19. Axios, Small publishers hit hardest by search traffic declines (17 March 2026, Chartbeat data)
20. Search Engine Journal, Search referral traffic down 60% for small publishers
21. Search Engine Journal, Google Algorithm Update History; May 2026 core update
22. Search Engine Land, Google May 2026 core update rolling out now
    

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