B2B Marketing Agency - London, UK

B2B marketing agency in London for science-led companies

Senior B2B marketers for life science, biotech, healthcare, and technology organisations across London and the UK. We build marketing programmes that generate qualified pipeline, shorten sales cycles, and deliver measurable commercial results.

Trusted by leading B2B companies

MicrosoftSciLeadsBio-RadInstemSophia Genetics
London, UK

B2B marketing built for the London market

London is Europe's leading life science and biotech hub. The Francis Crick Institute, one of Europe's largest biomedical research facilities, sits alongside world-class research at King's College London, Imperial College London, and UCL. The Knowledge Quarter in King's Cross and the emerging White City Innovation District are attracting global life science and technology talent. GSK, Vertex Pharmaceuticals, BenevolentAI, Isomorphic Labs, and hundreds of other B2B companies are fighting for the attention of the same sophisticated buyers. Your marketing needs to be sharper than the competition.

Where science meets strategy. We help London-area B2B companies cut through the noise with marketing programs that reach the right buyers and build qualified pipeline.

1,500+
London life science companies
40+
London research institutions
N/A
London annual VC funding
N/A
London industry workforce

Key companies in London

GSKVertex PharmaceuticalsAutolusBenevolentAIIsomorphic LabsMeiraGTx

Research institutions

Francis Crick InstituteKing's College LondonImperial College LondonUCLWellcome Trust
Your Team

Real people. Real expertise. No runaround.

At Marzipan, the strategists on the pitch are the same people running your campaigns. We are a focused team of senior B2B marketers with deep experience in life science, biotech, SaaS, and professional services. No layers of account management stand between you and the people doing the work.

We are also refreshingly easy to work with. Straight talking, fast responses, and a genuine commitment to helping our clients succeed.

Learn more about the team
Joe Chamberlain

Joe Chamberlain

Head of Digital Marketing

Paul Wright

Paul Wright

Head of Operations & Automation

Thomas Thornton

Thomas Thornton

Head of Advertising, Data & Analytics

What We Deliver

Full-service B2B marketing for London companies

Everything your marketing team needs, delivered by senior specialists who understand your industry and your buyers.

Proven Results

Real results for B2B clients

Numbers from our work with B2B and life science organizations.

6.6x
ROI on paid media
83%
Decrease in cost per lead
$5M+
Client revenue generated
+100%
Pipeline growth
Our Work

Case studies from B2B clients

Why Marzipan

A B2B marketing partner that gets it

London has hundreds of marketing agencies, but very few that truly understand B2B. We have spent years working with life science, medtech, technology, and professional services organisations, building programmes that generate real commercial outcomes rather than vanity metrics.

We are deliberately small. That means your team knows your business inside out, responds quickly, and cares about your results as much as you do. You will never be handed off to someone who does not know your product.

Pure B2B focus

We only work with B2B organisations. From King's Cross biotech to Shoreditch SaaS, we understand the multi-stakeholder buying processes and technical audiences that characterise the London market.

Experienced team

Every person on your account is a senior B2B marketer. No graduates learning on your budget, no outsourced execution. Experienced strategists who take full ownership of your programme.

Commercial outcomes

We measure everything against pipeline and revenue. Our programmes are built to generate qualified opportunities, and our reporting proves it to your leadership team every month.

Working with Marzipan was a turning point for our digital strategy. The new site is fast, scalable, and delivers qualified leads every week.

Mike Thurogood

VP Marketing, Instem

How visible is your brand in AI search?

Our free AEO Audit analyzes your brand across ChatGPT, Perplexity, and Google AI Overviews. Get a full report on your AI visibility, technical readiness, and competitive positioning in under two minutes.

Run Your Free AEO Audit
Choosing an Agency

What to look for in a London B2B marketing agency

The London market has no shortage of agencies that call themselves B2B specialists. Here is how to tell the real ones from the generalists.

Look for industry experience

The best B2B agencies have direct experience in your sector. Whether you are in technology, manufacturing, professional services, or life science, your agency should understand your buyers, your sales cycle, and the competitive dynamics of your market. Ask for case studies in your industry, not just testimonials from unrelated clients.

Ask who does the work

One of the most common complaints about agencies is the bait-and-switch: senior people show up for the pitch, then you get handed off to juniors. Ask specifically who will be on your account, what their experience level is, and whether the people in the pitch meeting are the same people doing the day-to-day work.

Demand measurement from day one

A good B2B agency does not just run campaigns and send reports. They build the infrastructure to connect marketing activity to pipeline and revenue. That means CRM integration, lead scoring, attribution modeling, and dashboards your leadership team can actually use. If they cannot show you cost per opportunity, walk away.

Check for strategic depth

Execution is important, but strategy is what separates a vendor from a partner. Your agency should be able to challenge your thinking, bring new ideas to the table, and connect your marketing activity to your broader commercial goals. If every conversation is about tactics and deliverables, you are paying for hands, not heads.

Why B2B marketing is different

B2B buying decisions involve multiple stakeholders, longer evaluation periods, and higher deal values than consumer purchases. That changes everything about how marketing should work. Your content needs to educate and build trust over weeks or months, not generate impulse clicks. Your campaigns need to reach specific job titles at specific companies, not broad demographics. And your measurement needs to track the full journey from first touch to closed deal, not just form fills.

Most marketing agencies were built for B2C or light-touch B2B. They know how to drive traffic and generate leads, but they struggle with the nuance of complex sales cycles, multi-stakeholder buying committees, and content that needs to pass muster with technical audiences. That is the gap a specialist B2B agency fills.

The London business landscape

London is at the forefront of Europe's life science and technology innovation. The Knowledge Quarter around King's Cross combines the Francis Crick Institute (1,500 researchers), the Alan Turing Institute, UCL, and the Wellcome Trust to create one of the world's most concentrated research ecosystems. Meanwhile, the White City Innovation District (2,500 square metres of life science incubator space) and the East London Life Sciences Super Cluster are attracting global biotech, medtech, and SaaS companies.

That concentration creates both opportunity and competition. The decision-makers you are trying to reach in the London area are constantly targeted by your competitors. Standing out requires marketing that demonstrates genuine understanding of their challenges, and an agency that can execute at a level that matches the sophistication of the market.

How we work with London-area companies

We work as an extension of your marketing team. That means regular check-ins, shared project management tools, and transparent reporting on everything we do. Most client relationships start with a discovery call where we learn about your market, your goals, and the challenges your team is facing. From there, we build a tailored strategy and execute against it month by month.

We are not a local London agency. We are a specialist B2B marketing agency that works with clients across the UK and internationally, with particular depth in life science, healthcare, and technology. But we know the London market well, we understand the local business ecosystem, and we have a strong track record of delivering results for companies in the area.

Industries we serve in London

Life Science & BiotechHealthcare & MedtechB2B TechnologySaaS & SoftwareProfessional ServicesManufacturing & Industrial

Channels we manage

  • SEO & content marketing
  • Google Ads & paid search
  • LinkedIn advertising
  • Email automation & nurture
  • Marketing operations & CRM
  • Website design & conversion

Let's start a conversation

Book a 30-minute discovery call. No pressure, no pitch deck. We will talk through your goals, your market, and whether we are the right agency to help.

FAQs

Common questions about B2B marketing in London

What does a B2B marketing agency do differently than a general marketing agency?

A B2B marketing agency focuses on selling to businesses rather than consumers. That means longer sales cycles, multiple stakeholders, higher deal values, and content that needs to educate and build trust over time. For industries like life science and biotech, it also means understanding regulatory constraints, technical buyer personas, and complex procurement processes. A generalist agency simply will not have this depth of knowledge.

Why should I hire a B2B marketing agency instead of building an in-house team?

Building an in-house team that covers strategy, SEO, PPC, content, email automation, and analytics is expensive and time-consuming. A specialist B2B agency gives you access to senior-level expertise across all of these disciplines from day one, without the overhead of recruiting, training, and managing a full department. Most of our clients work with us alongside a lean internal team, where we handle execution and they focus on product marketing and stakeholder alignment.

How do you measure the ROI of B2B marketing?

We track metrics across the full funnel. At the top, we measure organic rankings, traffic, and brand visibility. In the middle, we look at content engagement, email performance, and lead quality. At the bottom, we track marketing qualified leads, sales pipeline contribution, and cost per opportunity. Everything connects back to your CRM so you can see exactly which marketing activities are driving revenue.

Do you work with companies outside of London?

Yes. Whilst we work with a number of companies in the London area, we serve B2B and life science clients across the United Kingdom and internationally. Our team operates as a seamless extension of your marketing department regardless of where you are based.

What industries do you specialise in?

We specialise in B2B marketing for life science, biotech, pharmaceutical, medtech, and healthcare companies. We also work with B2B SaaS and professional services organisations. Our deepest expertise is in industries where the buyer is technical, the sales cycle is long, and credibility is everything.

How long does it take to see results from B2B marketing?

Paid channels like Google Ads and LinkedIn can generate qualified leads within the first 30 to 60 days. SEO and content marketing typically take three to six months to build meaningful organic visibility, though the compounding returns make it one of the highest-ROI channels over time. We set realistic timelines during our discovery process and report progress against them monthly.