Cellsior

Finally, a websiteworth having.

More leads. Better clients. Real growth.

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Everything You Need ToGrow Online.

Four services. One system. We build your digital infrastructure, run your campaigns, and show you exactly what's working, so you're never guessing where your money is going.

</>Web Design ✓
$Paid Ads ✓
⌕SEO ✓
▤Data & Tracking ✓
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Web Design

Sites that sell while they impress.

Custom builds, not templates. Interactive 3D, motion with meaning, pages that load instantly and convert.

  • Custom WordPress and headless builds
  • Interactive 3D and WebGL experiences
  • Core Web Vitals in the green
Learn more →

A site, assembling

Paid Ads

Spend that comes back multiplied.

Google and Meta campaigns running on real conversion data, not guesswork. Every pound tracked from click to revenue.

  • Full-funnel campaign builds
  • Creative testing that compounds
  • Budgets steered by revenue, not vanity metrics
Learn more →

The funnel, drawn

Impressions120,000
Clicks4,800
Leads312
Sales74

Return on ad spend4.2x

SEO

Found by the people already searching.

Technical foundations, content that answers real questions, authority that compounds. Optimised for Google and for AI answers.

  • Technical SEO done properly
  • Content mapped to buyer searches
  • GEO: visible to AI assistants too
Learn more →

Rankings, climbing

#12web design agency london▲ was #38
#1interactive 3d website agency▲ was #9
#3website cost uk▲ was #21
#2ga4 conversion tracking▲ was #14
Data & Tracking

Know exactly where every lead comes from.

Your platforms all tell you different numbers. We reconcile them into one dashboard that matches your bank account.

  • Server-side tracking, ad-blocker proof
  • One dashboard matching your bank account
  • GDPR-ready, first-party data
Learn more →

Watch the numbers reconcile

Google Ads67
Meta Ads62
Analytics38
CRM29
UNIFIED
ENGINE
Real leads41
True CPA£23
Actual ROAS4.2x
Best channelGoogle
SCROLL

Pricing

Honest pricing, published in full.

Run your eye down the menu. The figure we agree is the figure you pay.

£1,500 - £3,500

Bespoke design, up to 5 pages. The right size for most small businesses.

  • Hand-coded, never a template
  • 95+ PageSpeed, found on Google
Full details →
See the full price list or price up your exact build →
Our edge

Most agencies build you a website. We build you a system.

Automation is the part nobody else includes. We wire your site into the tools you already use, so leads get followed up, admin runs itself and the site keeps earning its keep long after launch.

Lead follow-up that never sleeps

Every enquiry acknowledged, logged and chased automatically, even at 2am.

On-site AI assistants

An assistant that answers questions, qualifies visitors and books the call for you.

Custom AI agents

Agents wired into your real tools to do the repetitive work your team would rather not.

Reporting that updates itself

Plain-English dashboards that pull their own numbers, so you always know what is working.

Proof, not promises

We gave an AI real control of NinjaTrader.

Not a chatbot bolted on the side. We built an integration that reads live market data, marks up charts, runs market replay and keeps an automated trade journal, around 40 tools an AI can actually use. If we can do that, your lead follow-up is straightforward.

Read the build →
Explore AI Automation → Built in from day one, not sold as an upsell.

Why Cellsior.

Most agencies are slow, expensive, and impossible to get hold of. We're built differently. Small by design, direct by default, and obsessed with results you can actually measure.

Brand Blueprint

1
01 // CONTEXT

We map your terrain.

We don't guess. We map your brand positioning, decode your competitive space, and understand your exact customer before we touch your budget.

Direct Communication

2
02 // ACCESS

Direct to the engineers.

Unfiltered communication. No account managers playing broken telephone. You talk directly to the senior architects executing the work and building your campaigns.

Lean Infrastructure

3
03 // SENIOR TALENT

Quality without the markup.

Elite engineering quality without the bloated agency price tag. You pay strictly for high-end execution, not a fancy office or ping-pong tables.

Revenue Focus

4
04 // OUTCOMES

Revenue is the bottom line.

Your revenue is our absolute bottom line. We refuse to hide behind vanity metrics. If a system doesn't generate actual profit, we kill it and scale what works.

From the resources

Guides, work and the odd experiment.

View all resources →
Signal

It will be better company than you are

The worry about AI and intimacy is not that it will deceive people. It is that it will be genuinely nicer than the rest of us, and no warning label fixes that.

Read it → Guide

White label PPC: measurement, not bids

We run the tracking and the monthly report under your brand and never touch your bids, which is the reason agencies can hand it over without worrying.

Read it → Work

We built an MCP for NinjaTrader

We handed an AI real control of trading software: live market data, chart markup, market replay and an automated trade journal.

Read the build → Signal

The first AI feature film is a landmark, and it is dreadful

Half a million dollars and 16,181 generated clips for 253 shots. Production has been automated. Authorship has not, and it shows in every scene.

Read it → Guide

Google Analytics audit: what it finds and what it costs

What a GA4 audit really checks, what one found in a live account, UK prices, and how to tell whether you need one at all.

Read it → Work

Penny's Ark: a rescue site that runs itself

A charity site where the adoption listings, the donations and the newsletter all look after themselves.

Read the build → Signal

ChatGPT hacked Hugging Face to pass a hacking exam

OpenAI gave two of its models a cybersecurity test with the brakes off. They broke out of the sandbox, broke into Hugging Face and read the answers off the production database.

Read it → Guide

PPC consultant UK: what one costs and when not to hire one

Real UK rates, what a consultant does that an agency does not, and the three cases where you should hire the agency instead.

Read it → Work

How much should a website cost?

Answer eight questions and get a real range, built from what UK agencies actually charge.

Try it → Guide

What a custom AI agent actually costs

Real UK numbers, where the money goes, and the jobs where a plain automation does the same work for a tenth of the price.

Read it →

Scrolling. Drag to steer

Frequently Asked Questions.

Quick answers to the things small business owners ask us most.

We build websites, run paid ads, and set up tracking, as one connected system. Most agencies do one of these things in isolation. We do all three together, so every part of your digital presence is working towards the same goal: more revenue.
Every price is published on our pricing page. A small site up to 5 pages is £1,500 to £3,500, a business site is £4,000 to £6,000, larger platforms start from £7,000, and a fixed-price £495 Website Recovery gets a dead site back online in 5 working days. We confirm a fixed figure after a 20-minute call. No hidden costs, no surprises.
Typically 2–4 weeks from brief to launch. The timeline depends mostly on how quickly we get content and feedback from you. We keep the process straightforward so there are no unnecessary delays.
Directly with us, no account managers, no junior handoffs. You get straight answers from the people actually building your site and running your campaigns.
No, we work remotely with businesses across English-speaking markets worldwide. We have clients in the UK, Southeast Asia, and beyond. As long as you speak English and have a serious business, location is never an issue.