Top 10 B2B Marketing Agency London

London offers a wealth of B2B marketing agencies—from AI-powered outreach to SaaS and tech-focused strategies. In the heart of the UK’s capital, London is a powerhouse for B2B marketing innovation. Ranking the "best" B2B marketing agency depends on your company's specific goals and priorities.

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London is blessed with a few top-performing B2B marketing agencies, let's look at them in more detail.

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Top 10

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1. B2B-AI
2. Edelman
3. Torpedo Group
4. Twogether
5. Gripped
6.  The Marketing Practice
7.  Fox Agency
8. Cremarc
9. Transmission
10. Digital Litmus

Our Top 10 B2B Marketing Agencies

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1. B2B-AI

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Pioneers of automated outreach solutions, blending B2B email marketing, LinkedIn automation, and real-time trigger campaigns to secure high-quality meetings with decision-makers. They also offer detailed performance analytics to optimise B2B marketing campaigns continuously.

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Year Founded: 2024

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Team Size: ~ 7 employees (listed as 2–9)

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Key Services:

• Automated Email Campaigns: Personalised sequences at scale
• LinkedIn Automation: Targeted connection requests and InMails
• Trigger Campaigns: Outreach triggered by prospect actions

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Unique Strengths:

• Seamless integration of industry-leading tools
• High deliverability architecture with SMTP management
• Data-driven personalisation for improved response rates

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Industries Served: B2B, Fintech, SaaS, SEO, Marketing, Tech, Software.

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Case Studies:

• LinkedIn Outreach Campaign (2025): Ran a B2B LinkedIn outreach for a technology services client, achieving a ~50% connection acceptance rate and booking 20+ meetings in 22 days.
• Investment Firm Email Strategy (2024): For a UK financial-services investment firm, built a combined email/LinkedIn campaign that helped the client close 7 new deals and build a prospect list of 6,500, boosting overall ROI.

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2. Edelman

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A globally renowned communications and B2B marketing firm with deep expertise in B2B brand strategy and stakeholder engagement. Their integrated campaigns leverage proprietary research and digital innovation to build trust and drive business impact.

Year Founded: 1952

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Team Size: ~ 6,400 employees worldwide

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Key Services:

• Brand and reputation strategy
• Content development and thought leadership
• Digital marketing and social media programmes
• Media relations and PR
• Stakeholder mapping and engagement

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Unique Strengths:

• Extensive global network with local market insight
• Proprietary Edelman Trust Barometer research for data-driven decision-making

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Industries Served: Finance, Sports, Consumer, Healthcare, Tech.

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Case Studies:

• LEGO ‘Ralph’ Chatbot: Developed Ralph, a Facebook Messenger chatbot to help LEGO customers find perfect gifts, making the gift-buying experience interactive and fun.
• ASICS Virtual Summit: Created a virtual-reality product launch (“Virtual Innovation Summit”) for ASICS, generating 234 media articles across 19 countries and a media reach of 2.2 billion.

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3. Torpedo Group

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Award-winning specialists in humanising complex B2B marketing products through immersive digital experiences and virtual brand tours. Their virtual brand tours have achieved a 30% increase in engagement rates.

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Year Founded: 2003

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Team Size: ~ 100 (listed on LinkedIn as 51–200 employees)

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Key Services:

• Account-based marketing (ABM)
• UX design & website usability
• Brand communications & digital experiences
• Virtual brand tours

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Unique Strengths:

• A blend of strategic thinking with cutting-edge tech
• Tailored solutions for advanced technology and industrial sectors

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Industries Served: B2B, Manufacturing, Tech, SaaS, Fintech.

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Case Studies:

• SD Worx ‘HARRI’ Campaign (HR/Payroll): Launched a multi-channel AI/robotics campaign for HR solutions provider SD Worx. The spoof “HARRI” robot campaign went viral, garnering 800k video views and a 32% increase in brand awareness.
  
  
• Autodesk Website Redesign (Construction Software): Redesigned Autodesk’s BIM 360 website, resulting in a 72% increase in leads and a 132% return on investment within three months.

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4. Twogether

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A forward-thinking agency harnessing AI and analytics to optimise demand generation and sales enablement for tech companies. Their predictive analytics models help B2B marketing and anticipate customer needs before they arise.

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Year Founded: 2014

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Team Size: ~ 300 (LinkedIn lists 201–500 employees)

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Key Services:

• Demand generation & pipeline building
• Account-based marketing (ABM)
• Sales enablement & channel engagement
• Analytics optimisation

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Unique Strengths:

• AI-driven insights for informed campaign performance
• Focus on measurable ROI and scalable growth

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Industries Served: SaaS, IT, AI.

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Case Studies:

• ServiceNow Concierge Campaign: Ran a partner-focused campaign for ServiceNow (“Concierge Service”), achieving 75% of target partners registered in just two months.
  
  
• “The Safe Place” (Cybersecurity/IoT): Delivered a campaign called “The Safe Place” (market-facing cybersecurity initiative) that hit 128% of its lead generation target.

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5. The Marketing Practice

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Global B2B specialists delivering full-funnel growth strategies by combining data, technology, and creativity. They consistently rank in the top 5 of B2B marketing satisfaction surveys.

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Year Founded: 2002

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Team Size: ~ 300–400 (LinkedIn shows 201–500 employees)

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Key Services:

• Brand-to-demand marketing
• Pipeline generation
• Account-based insights
• Marketing effectiveness improvement

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Unique Strengths:

• Integrated teams for long-term partnerships
• Deep expertise in proving marketing impact on growth

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Industries Served: B2B, Tech, Telecommunications, Enterprise.

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Case Studies:

• Forcepoint “Clarity” Campaign (Cybersecurity): An ABM and digital campaign for security software leader Forcepoint. In six months, click-through rates jumped 73% (display ads 120% above benchmark) and the campaign generated a $82M sales pipeline at a 75× return on ad spend.
  
  
• Mitsubishi Chemical Rebranding (Industrial): Developed a new B2B brand identity for Mitsubishi Chemical Group’s Advanced Materials division to bring emotion to a fact-driven market. This involved creating a compelling brand story for aerospace, automotive, and renewable-energy materials sectors.

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6. Gripped

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Gripped ignites demand through strategic content marketing and inbound lead generation focused on SaaS and tech, with a dedicated in-house research team that stays ahead of SaaS market trends with B2B Marketing.

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Year Founded: 2017

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Team Size: ~ 40 (LinkedIn: 11–50 employees)

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Key Services:

• Digital sales & marketing strategy
• Content marketing & SEO/PPC
• Website design & development
• Sales enablement

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Unique Strengths:

• Tailored approach addressing specific business challenges
• Strong emphasis on content-driven inbound marketing

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Industries Served: SaaS, B2B, Tech, Software.

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Case Studies:

• BalckDot (OSINT Software): Demand-generation program for a cybersecurity OSINT platform. Over the engagement, Gripped’s multi-channel marketing delivered a £2.1M sales pipeline.
  
  
• Nexstor (Managed IT Services): Paid-media campaign for an IT service provider. With only a £20k ad budget, the campaign returned £2M in sales.

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7. Fox Agency

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An integrated firm partnering with ambitious tech brands to deliver creative strategies, global PR, and experiential marketing. They have won multiple awards for their innovative experiential marketing campaigns and B2B marketing approach.

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Year Founded: 2001

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Team Size: ~ 100 (LinkedIn: 51–200 employees)

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Key Services:

• Brand strategy & identity development
• Digital marketing & content creation
• Global PR & motion/video production
• Events & experiential marketing

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Unique Strengths:

• Full-service capabilities across the marketing spectrum
• Big-idea thinking backed by strategic execution

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Industries Served: B2B Tech, SaaS, Fintech, IT/Cloud, IoT, Automotive.

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Case Studies:

• BearingPoint (Consulting): Developed the “Power of the Possible” campaign for management consultancy BearingPoint, boosting its brand presence and demand in the US market (case details on their site).
  
  
• Cadence (Semiconductors): Launched Cadence’s embedded software product, generating awareness and dozens of qualified leads through targeted content and events. (Note: Fox Agency’s site highlights similar B2B tech campaigns.)

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8. Cremarc

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Tech-sector specialists delivering strategic, creative, and data-driven B2B marketing solutions to maximise ROI. They prioritise client collaboration through regular strategy workshops and feedback sessions.

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Year Founded: 2012

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Team Size: ~ 20 (LinkedIn: 11–50 employees)

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Key Services:

• Strategy, branding & proposition development
• Digital marketing & ABM
• Marketing technology integration
• Content marketing

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Unique Strengths:

• Exclusive focus on technology clients
• Combines creativity with rigorous data analysis

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Industries Served: Software, SaaS, Cybersecurity, Fintech, IoT, B2B.

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Case Studies:

• Uniserve (IT Security): SEO campaign for Uniserve led to a 114.29% increase in sales quotes generated.
  
  
• Plentific (PropTech): Content-led demand-generation for rental-market software provider Plentific exceeded lead targets by 152%.

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9. Transmission

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Transmission is a strategic B2B marketing agency specialising in data-driven campaigns and thought leadership content. Their integrated approach ensures alignment between brand messaging and sales objectives, resulting in consistent pipeline growth.

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Year Founded: 

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Team Size: ~ 300 (LinkedIn: 201–500 employees)

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Key Services:

• Strategic marketing consultancy & campaign planning
• Thought leadership content development
• Digital advertising & programmatic media
• Account-based marketing & nurturing
• Analytics & performance reporting

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Unique Strengths:

• Strong expertise in technology and professional services sectors
• Proven ability to align marketing and sales through data insights

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Industries Served: Software, Hardware, Cloud, Cybersecurity, Transaction, Telecommunications.

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Case Studies:

• Windows 11 Pro Launch (Microsoft): Multi-channel go-to-market for Windows 11’s Copilot AI feature, driving awareness and demand for the OS upgrade.
  
  
• HP Wolf Security (Cybersecurity): Created the brand launch for HP’s new Wolf Security line – an “internationally awarded” B2B branding campaign

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10. Digital Litmus

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A Platinum HubSpot partner, Digital Litmus specialises in connected sales, marketing, and RevOps to accelerate B2B growth. They provide ongoing training and support to ensure clients maximise their HubSpot investments and B2B marketing opportunities.

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Year Founded: 2015

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Team Size: ~ 20 (LinkedIn: 11–50 employees)

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Key Services:

• Inbound marketing & paid campaigns
• SEO & content marketing
• HubSpot implementations & RevOps
• Website design & optimisation
• Sales enablement

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Unique Strengths:

• Seamless integration of HubSpot tools
• Holistic approach to RevOps for measurable ROI

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Industries Served: B2B, Tech, SaaS, Marketing Software.

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Case Studies:

• Spektrix (Ticketing/CRM SaaS): ABM-driven demand generation. Digital Litmus’s “Fusion” campaign engaged 48% of target accounts and created £540K of new pipeline.
  
  
• GeoSlam (3D Geospatial): Deployed chatbots and conversational marketing for geospatial tech firm GeoSlam, generating multiple millions in an influential pipeline (as noted by GeoSlam’s CMO).

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Choosing the Best B2B Marketing Agencies in London UK

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Selecting the right B2B marketing agency in London can transform your outreach and accelerate growth—whether you need advanced AI-driven email marketing, comprehensive B2B marketing services, or specialised marketing consultancy. This curated list of the best marketing agencies in London highlights their unique strengths, service offerings, and industry expertise. Use this guide to compare and contrast leading firms, and align your business objectives with the agency that offers the most relevant combination of strategy, technology, and creative execution for your next growth initiative.

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