About MarGen · GEO + AEO Agency · UK

We Engineer AI Visibility.

MarGen is a UK-based Generative Engine Optimisation agency. We build the authority infrastructure that makes AI systems — ChatGPT, Perplexity, Google AI Overviews, Claude — cite and recommend your brand when buyers search.

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Our Story

From Growth Partner
to GEO Pioneer.

MarGen started as a B2B growth partner helping technology companies scale revenue. We built sales pipelines, ran outbound campaigns, and drove leads for SaaS and IT businesses across the UK.

Then we watched the ground shift. AI-generated answers started appearing above search results. Buyers began asking ChatGPT for recommendations before visiting a single website. The companies we'd built pipelines for were invisible in the one place their buyers now looked first.

So we rebuilt everything. We studied how AI models discover, evaluate, and cite brands. We reverse-engineered the signals that determine who gets recommended and who gets ignored. And we built a methodology — the Synaptic Authority Engine — specifically designed to engineer AI citation authority.

Today, MarGen is a specialist GEO and AEO agency. We serve B2B SaaS, financial services, legal, healthcare, and premium e-commerce brands that refuse to be invisible to generative AI.

Leeroy Powell - CEO, MarGen
Leeroy Powell
Founder & CEO

Former growth partner who scaled 17+ tech companies before recognising that AI search was fundamentally changing how buyers discover and choose vendors. Built the Synaptic Authority Engine to solve the problem no traditional agency was addressing.

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What We Believe

The Principles Behind
Everything We Do.

01
AI Is the New Front Door
Over 65% of B2B buyers now use AI tools before visiting a vendor website. If you're not in the AI answer, you're not in the conversation. We build the presence that puts you there.
02
Authority Can't Be Faked
AI models don't rank pages — they evaluate trust signals across the entire web. Real authority comes from consistent entity signals, earned citations, and genuine expertise. We engineer all three.
03
GEO and SEO Are Complementary
70%+ of AI-cited URLs already rank on Google page one. Strong SEO is the foundation GEO builds on. We don't replace your SEO — we extend it into the AI layer where your buyers are moving.
04
Measurement or It Didn't Happen
We track citation frequency, brand mention share, and AI recommendation rate across every major platform. If we can't prove the impact, we change the approach until we can.
05
Industry Context Matters
A regulated financial services firm needs a fundamentally different GEO approach than a Series B SaaS startup. We built vertical-specific playbooks because generic doesn't work.
06
Transparency Over Everything
We publish our methodology. We share our frameworks in our blog. We show you exactly what we're doing and why. The best clients are informed clients.
MarGen in Numbers

Built on Results.

5
Verticals served — B2B SaaS, Financial Services, Legal, Healthcare, E-commerce
6
Steps in the Synaptic Authority Engine — our proprietary GEO methodology
4–8w
Typical time to first measurable AI citation improvements
UK
Based in the UK, serving ambitious brands nationally and internationally
Work With Us

See What AI Says
About Your Brand.

Our free AI Visibility Audit shows you exactly where you appear — and where competitors appear instead — across ChatGPT, Perplexity, Google AI Overviews, and Claude.

Get Your Free AI Visibility Score →