SEO Agency London

We're what you've been searching for.

Visibility. Leads. Growth. Done.

More leads. More revenue. More visibility on the search engines that matter — backed by 15 years of proof and search engine optimisation campaigns for brands like BBC, Microsoft, and Salesforce.

GoogleGoogle Partner 15+ Years' Experience

Trusted by teams at

BBC Microsoft BMW T-Mobile Commvault Honda Unilever KPMG HomeViews Politico Whitehall Training Caffia Coffee Group WooRank Insider Ocushield Infonetica Rezcontrol
Technical SEO
Content & On-Page SEO
Link Building
Digital PR
Local SEO
AI SEO / GEO
Ecommerce SEO
Google Ads
PPC Management
Technical SEO
Content & On-Page SEO
AI SEO / GEO
Link Building
Local SEO

SuperSize Digital is a London-based SEO and AI search optimisation agency specialising in organic growth for B2B, SaaS, healthcare, legal, fintech, AI, and ecommerce businesses. Founded in 2016 by Stephen Tasker, who led SEO campaigns for BBC, Microsoft, Salesforce, and HomeViews (acquired by Rightmove for £8M), we deliver search engine optimisation strategies that generate leads and revenue — not vanity metrics. Based at 399-405 Oxford Street, Mayfair, London.

1M+ Leads Generated
£50M+ Revenue Influenced
15+ Years Experience
B2B Industry Specialists
Stephen Tasker - Founder, SuperSize Digital

Founded in 2016 by Stephen Tasker — I've spent 15+ years in the trenches of search marketing, running campaigns for brands like BBC, Microsoft, Salesforce, and Honda. I was the SEO lead who built HomeViews' organic channel from zero to 2M+ visitors, which helped Rightmove acquire them for £8M. That hands-on experience — not just strategy decks — is what shapes every campaign we take on.

ChatGPT Claude AI Perplexity AI

Why Do So Many SEO Agencies Fail to Deliver Results?

You've probably been here before. An SEO company promises you page one rankings, sends you monthly reports packed with impressions and domain authority scores, and six months later you still can't point to a single new customer that came from organic search.

Too many businesses are locked into digital marketing contracts that sound impressive on paper but deliver nothing in the real world. Rankings that don't convert. Traffic that doesn't buy.

What Should a Good SEO Agency Actually Deliver?

Meanwhile, your competitor is outranking you for the exact terms your customers are searching — and you can't work out why.

The best SEO results come from agencies that obsess over outcomes, not activity. That's exactly why we do things differently.

Our Process

How SuperSize Digital Delivers Results

A continuous cycle of strategy, execution, and optimisation — not a one-off project that gathers dust.

1

Establish Goals

Define commercial objectives — leads, revenue targets, and growth KPIs that matter to your business.

2

Audit & Assess

Deep-dive into your site, competitors, and market landscape to identify the biggest opportunities.

3

Strategy & Roadmap

A prioritised action plan built around your goals — technical, content, links, and paid channels.

4

Execute & Optimise

We implement changes, launch campaigns, and continuously refine based on real performance data.

5

Test & Adjust

Split-test landing pages, ad copy, and content. Double down on what converts, cut what doesn't.

6

Report & Scale

Monthly reporting on leads and revenue. Then we scale winning strategies and restart the cycle.

Start Your Growth Cycle
Proven Results

What Results Has SuperSize Digital Achieved for Clients?

Numbers don't lie. Here are three examples of what happens when an experienced SEO agency focuses on the metrics that actually matter to your business.

B2B SEO Case Study
+83%
Organic Traffic Growth
169 Top 10 Rankings
17 Page 1 Terms
12mo Turnaround
SEO Case Study

Caffia Coffee Group

A year-long decline in organic visibility after the search landscape shifted towards ecommerce-dominant results. Caffia needed a strategy to reclaim commercial visibility.

  • Reversed 12-month traffic decline
  • 169 keywords ranked in top 10 positions
  • 17 high-value commercial terms on page 1
  • B2B lead generation restored and grown
Read Full Case Study
PropTech / Startup
2M+
Annual Organic Visitors Built
£8M Acquisition
0→2M Visitors
#1 Channel
Featured Case Study

HomeViews

A startup with zero organic presence needed to build an entire acquisition channel from scratch in one of the UK's most competitive verticals — property reviews.

  • Built organic channel from zero to 2M+ annual visitors
  • Became the primary acquisition channel for the business
  • Directly contributed to Rightmove's £8M acquisition
  • Stephen Tasker was the SEO lead on this project
Read Full Case Study
London Cardiovascular Clinic Healthcare SEO
1,307%
Increase in Patient Enquiries
51/mo Enquiries
#1 Local Rank
169 5★ Reviews
Healthcare Case Study

London Cardiovascular Clinic

A specialist cardiology practice competing against NHS trusts and major hospital groups for highly competitive medical search terms in London.

  • 1,307% increase in SEO-driven patient enquiries
  • Ranked #1 locally for key cardiology terms
  • Outranked NHS trusts and major hospital groups
  • Sustainable long-term organic growth delivered
Read Full Case Study

Want results like these? Let's talk.

View All Case Studies Book a Free Strategy Call
Client Testimonials

What Our Clients Say

"SuperSize Digital transformed our organic presence. Within 12 months we went from barely ranking to dominating page one for our most competitive commercial terms. The leads speak for themselves."
JR
James Richardson Marketing Director, B2B SaaS Company
Why SuperSize

Why Choose SuperSize as Your SEO Agency in London?

There are hundreds of SEO agencies in London. Here's why businesses choose us — and stay.

Google Partner

Certified agency with £2.5M+ in managed ad spend across Google, Bing, Meta, and LinkedIn.

Senior-Led

No junior handoffs. The strategist building your roadmap is the same person executing and reporting.

Revenue-Focused

We report on leads and pipeline, not impressions. If it doesn't generate business, we don't celebrate it.

15+ Years

Every algorithm update since Panda, navigated. BBC, Microsoft, Salesforce — experience that compounds.

AI-Ready

Optimised for ChatGPT, Perplexity, and Gemini citations. Your brand visible where search is heading.

London HQ, Global Reach

Based at 399-405 Oxford Street, Mayfair. Campaigns delivered across the UK and internationally.

Frequently Asked Questions About SEO Services

SEO investment in London typically ranges from £500 to £5,000+ per month depending on the competitiveness of your market, the current state of your website, and your growth goals. We don't believe in one-size-fits-all pricing — every business has different needs. We'll give you a clear, transparent quote after your free audit so you know exactly what you're investing in and why.

Meaningful results typically take 3 to 6 months. SEO is not a quick fix — it's a compounding investment. Early wins like technical fixes and quick-win content can show movement within weeks, but the kind of sustained organic growth that transforms your business takes consistent effort. Any SEO consultant or agency promising page one rankings in 30 days is either lying or using tactics that'll get your site penalised.

Absolutely. While we're based in London with an office in Mayfair, we work with businesses across the UK and internationally. Our SEO strategies work regardless of geography — whether you need local SEO for a single location, national coverage, or international campaigns.

Search engine optimisation (SEO) builds your organic visibility over time — you earn your rankings through great content, technical excellence, and authority. PPC (pay-per-click) puts you at the top of search results immediately, but you pay for every click. The smartest digital marketing strategies use both: PPC for immediate visibility while SEO compounds in the background. We offer both services.

Leads first. Revenue second. Rankings third. Too many SEO agencies celebrate ranking improvements while their clients see no commercial impact. We track everything — rankings, traffic, conversions — but we report on what matters: how many enquiries did your organic channel generate this month, and what's the trend?

No. And you should be wary of any SEO company that does. Google's algorithm considers hundreds of factors, and no agency controls all of them. What we can tell you is that our track record speaks for itself — 15+ years of consistent results across competitive markets. We don't guarantee positions. We guarantee the quality of work, the transparency of reporting, and a relentless focus on your commercial goals.

Yes — and your first one is free. Our SEO audit covers your technical foundation, content gaps, competitor positioning, and backlink profile. It's not a generic automated report — it's a manual review by a senior strategist. You'll walk away knowing exactly where you stand and what to fix first, whether you work with us or not.

We've delivered results across B2B, SaaS, ecommerce, healthcare, PropTech, and professional services. Our client history includes everything from enterprise brands like BBC and Microsoft to scaling startups like HomeViews. The common thread: businesses that need digital marketing to drive measurable commercial growth.

View Our Case Studies

See how we've delivered measurable growth for businesses across the UK — from startups to household names.

See Results

Meet the Team

Senior-led strategy from people who've delivered for BBC, Microsoft, and Salesforce. Get to know us.

About Us
Latest Insights

SEO Insights & Strategies

Practical advice from 15+ years of running SEO campaigns for businesses that need results, not theory.