"Google holds 91.5% of UK search, and online sales are 28% of UK retail. We compared the 10 best SEO agencies in the UK on specialty, pricing, and verifiable proof — including ecommerce, local, and technical specialists. Yes, we are on the list, disclosed."
Key Takeaways
- 1Our researched top 10: FactoryJet (disclosed self-inclusion), Brainlabs, Croud, Builtvisible, NOVOS, Rise at Seven, Screaming Frog, Blue Array, The SEO Works, and Add People — every entry verified on its own website on 06/11/2026.
- 2Segment fit is the most important filter: enterprise (Brainlabs, Croud, Builtvisible), ecommerce (NOVOS, Rise at Seven, FactoryJet), technical (Screaming Frog, Blue Array), SME/local (The SEO Works, Add People).
- 3SEO cost in UK runs £500–£20,000+/month: local £500–£1,200, SME £1,500–£3,000, mid-market £2,500–£5,000, enterprise £5,000+ (Whitehat SEO 2026 pricing guide). 78% of UK providers bill via monthly retainer.
- 4UK SEO pricing has risen 15–30% since 2024, driven largely by AI-search scope expansion — always ask whether AI search is included or an add-on.
- 5Google still holds 91.47% of UK search (StatCounter, April 2026) and online sales are 28% of UK retail (ONS Q1 2026) — and the content that ranks in Google is the same content ChatGPT and AI Overviews cite.
- 6Almost no UK agency publishes pricing. Demand one case study with revenue numbers, one named account lead, and the price in writing before committing.
The short answer
The best SEO agency in the UK depends on your segment. For SMBs and ecommerce brands that want published pricing with AI-search coverage included, it's FactoryJet (yes — our list, fully disclosed below). For enterprise integrated media, Brainlabs. For ecommerce-only specialism, NOVOS. For technical depth, Screaming Frog. For SME budgets, Add People.
The UK context makes agency choice unusually consequential in 2026: Google still holds 91.47% of UK search (StatCounter, April 2026), online sales are 28% of all UK retail (ONS, Q1 2026) — and UK SEO pricing has risen 15–30% since 2024 as AI-search work expands scope (Whitehat SEO 2026 pricing guide). Picking wrong is more expensive than it used to be.
We verified every agency below on its own website on 06/11/2026. No pay-to-play, no invented review scores, and self-stated claims are labeled as such. Disclosure: FactoryJet appears on its own list. The current page-one for this query is roughly half directories (Clutch, Semrush, SEO.com) and half agencies ranking themselves — transparent self-inclusion with a checkable methodology is the established pattern, and we follow it openly.
Top 10 SEO agencies in UK — comparison table
| # | Agency | HQ | Specialty | Published pricing | Best for |
|---|---|---|---|---|---|
| 1 | FactoryJet (us) | Serving UK remotely | SEO + AI search in one retainer; engineering-led | Yes — fixed retainers, month-to-month | SMBs & ecommerce wanting build + SEO together |
| 2 | Brainlabs | London | Integrated media; "AI Visibility"; Cortex AI platform | No | Mid-market to enterprise |
| 3 | Croud | London + Shrewsbury | Global media + data; 2,900-specialist Croudie Network | No | International scaling brands |
| 4 | Builtvisible | London | Organic-only: SEO, content, digital PR (Brave Bison group) | No | Brands wanting a pure organic specialist |
| 5 | NOVOS | London | Ecommerce SEO exclusively; 100+ migrations | No (free SEO calculator) | DTC/Shopify/headless stores |
| 6 | Rise at Seven | Manchester + London | Creative SEO, digital PR, social search | No | Consumer/retail brands |
| 7 | Screaming Frog | Henley-on-Thames | Technical SEO; makers of the SEO Spider | No (tool pricing public) | Technical, data-driven teams |
| 8 | Blue Array | Reading + London | SEO-only consultancy; GEO; B Corp | No | In-house teams needing consultancy |
| 9 | The SEO Works | Sheffield + Leeds + London | Full-stack organic for SMEs; free review | No | UK SMEs and mid-market |
| 10 | Add People | Altrincham | SME-native SEO, local SEO, ecommerce SEO | Partial — entry from £89/mo | Small and local businesses |
Two of ten publish meaningful pricing. As with AI SEO, opacity is the norm — use it as a negotiating filter.
The 10 best SEO agencies in the UK, reviewed
1. FactoryJet — best for SMBs and ecommerce (disclosure: this is us)
We're an engineering company that does SEO, not a marketing company that resells it. Every retainer covers classic Google SEO and AI search — ChatGPT, Perplexity, Claude, Gemini, and AI Overviews — reported per engine, monthly. Sites we build ship at 100/100 Lighthouse, and the same engineers run technical SEO, so audit findings actually get implemented.
Why we rank ourselves first for SMBs: published fixed pricing, month-to-month terms, and one team for build plus SEO — the implementation gap that kills most agency relationships doesn't exist. Where competitors beat us: enterprise media integration (Brainlabs, Croud) and ecommerce migrations at massive scale (NOVOS). See our UK coverage →
2. Brainlabs — best enterprise integrated media
London-based, independent, founder-led. SEO and "AI Visibility" sit alongside paid media and measurement (MMM, incrementality), with AI agents running on its Cortex platform — powered by Hippocampus, a proprietary repository of 2,500+ logged experiments. Strong Retail & Ecommerce practice.
3. Croud — best for international scale
London and Shrewsbury, plus New York, Atlanta, and Dubai. Croud's model is unique: 600+ in-house staff supplemented by the "Croudie Network" of 2,900+ on-demand specialists across 118 markets. If you're scaling into multiple countries and want SEO under one roof with paid and data, this is the pick.
4. Builtvisible — best pure organic specialist
London, organic-only: SEO, content, digital PR. Acquired by listed digital group Brave Bison in March 2025 — it now operates as the group's organic performance arm. Publishes serious case studies, including 1,156% ROI for GLL, the UK's largest leisure social enterprise.
5. NOVOS — best ecommerce SEO agency
London-based (Spitalfields) and ecommerce-exclusive: Shopify, headless, replatforming and migration SEO (100+ ecommerce migrations), plus GEO/AI search. Clients include Adidas, Lush, Bloom & Wild, and Ruggable. States it is the first employee-owned ecommerce growth agency in the UK. If you run a store and want a specialist, start here.
6. Rise at Seven — best creative SEO and digital PR
Manchester and London (plus New York). Search-first content marketing: creative campaigns, digital PR, social search (TikTok/YouTube SEO), and AI/LLM search. Clients include JD Sports, PrettyLittleThing, and Revolution Beauty. Its 79-awards figure is self-stated — but the campaign work is publicly visible and widely imitated.
7. Screaming Frog — best technical SEO
Henley-on-Thames. The team behind the SEO Spider and Log File Analyser — the tools most other agencies on this list use daily. Agency services span technical SEO, PPC, link building, and AI search optimisation, with a five-year winning streak at the UK Search Awards. For crawl-heavy, log-file-deep technical work, nobody is better positioned.
8. Blue Array — best SEO-only consultancy
Reading HQ with a London office. Organic-search-only: SEO, GEO, digital PR, audits, plus its trademarked "Consulgency®" model and an "Ignite" package for startups. B Corp certified; founder Simon Schnieders authors the In-House SEO book series. Clients include Zoopla, RAC, and the Post Office.
9. The SEO Works — best for UK SMEs
Sheffield HQ, offices in London and Leeds, 80+ specialists, employee-owned, established 2009. Full-stack organic — SEO, local SEO, technical, AI SEO/GEO, digital PR — with published AI-search case numbers (+287% AI Overview citations and +121% ChatGPT referrals for DHL). The free website review is a genuinely low-risk entry point.
10. Add People — best for small and local businesses
Altrincham, Greater Manchester. Built for SMEs: 250+ staff, 2,000+ five-star Trustpilot reviews, Google Premier Partner, with dedicated local SEO and ecommerce SEO services and entry products from £89/month. The most accessible starting point on this list for a small local business.
How much does SEO cost in UK?
| Tier | Monthly cost | Notes |
|---|---|---|
| Local / startup | £500–£1,200 | Local SEO, single-location businesses |
| Growing SME | £1,500–£3,000 | Where "meaningful work" starts (~£1,500/mo) |
| Mid-market / B2B | £2,500–£5,000 | National competition, content programs |
| Enterprise | £5,000–£20,000+ | Multi-market, multi-domain |
One-off work: audits £500–£7,500; migrations £1,000–£15,000. Hourly: £40–£100 freelance, £70–£300 agency. 78% of UK providers bill monthly retainers, and prices are up 15–30% since 2024 — driven largely by AI-search scope (AEO/GEO adds 20–50% to traditional scope per the same guide). If you are comparing quotes, ask explicitly whether AI search is included or an add-on; that single question explains most price gaps. (Source: Whitehat SEO, SEO Packages & Pricing UK 2026.)
How to choose — segment first, then proof
The single most important filter is segment fit: an enterprise media shop will under-serve a 10-person SME (you'll get the B-team), and an SME shop will drown inside a multi-market enterprise brief. Decide your segment from the table above before comparing anything else. Then apply two proof tests: ask for one case study with revenue numbers (not traffic graphs — revenue), and ask who, by name, will run your account and how much senior time you get monthly. Finally, get the price in writing before any discovery call eats your calendar; the agencies that resist are telling you something.
Methodology
Every agency was verified on its own website on 06/11/2026: service pages, office addresses, ownership status, and at least one differentiator checkable at the source. Self-stated claims (awards counts, client tallies) are labeled. We noted Builtvisible's 2025 acquisition by Brave Bison rather than describing it as independent. FactoryJet's inclusion is disclosed self-placement — consistent with how this SERP actually works, where roughly half of page one is agencies and directories ranking themselves. Nobody paid to appear.
Sources: StatCounter UK search share (April 2026); ONS internet sales series J4MC (April 2026 release); Whitehat SEO Packages & Pricing UK 2026; Microsoft Clarity AI traffic report; agency pages verified 06/11/2026.
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Bhavesh Barot
Founder & CEO
Founder & CEO of FactoryJet — web design and e-commerce agency serving 500+ US, UK, and UAE businesses since 1999. Expert in small business website strategy, Shopify development, and Core Web Vitals optimization.