B2B Marketing Agency UK
A B2B marketing agency sells to businesses on your behalf — building demand, brand and pipeline against a buying committee rather than a consumer. This guide compares eleven UK-headquartered B2B marketing agencies, and shows how to pick between them.
Every agency below is a real, trading, UK-based firm taken from our own directory. Where an agency publishes its fees, we quote them. Where it does not, we say so rather than estimate.
What a B2B marketing agency actually does
A B2B marketing agency builds demand among other businesses. That sounds like a small distinction from a consumer agency; in practice it changes almost everything about how the work is built.
The buying unit is a committee, not a person. The purchase cycle runs in quarters or years, not minutes. The addressable market is small enough to name — often a few thousand accounts rather than a few million households.
And the audience is mostly not buying. Prof. John Dawes of the Ehrenberg-Bass Institute, writing for the LinkedIn B2B Institute in 2021, framed it as a rule of thumb rather than a measurement: in most categories the large majority of business buyers — he uses 95% as a round number — are out of market in any given quarter, simply because purchase cycles run to years. Dawes is explicit that "the 95% figure is not meant to be a precise rule". Treat it as a reason to build brand as well as capture demand, not as a statistic to put on a slide.
The practical consequence: a B2B marketing agency is judged on pipeline influenced over quarters, not clicks bought this month.
Start from the brief, not the list
Almost every "best B2B marketing agency" list is ordered as though one agency could be best for everyone. None of them are.
A 400-person enterprise ABM group and a 30-person industrial specialist are not competing for the same brief. Picking well means deciding what the work actually is first, then reading the list through that filter.
Answer four questions and the shortlist narrows itself.
What a B2B marketing agency costs
Gartner's 2026 CMO Spend Survey — 401 marketing leaders across North America, the UK and Europe, fielded January to March 2026 — puts average marketing budgets at 7.8% of company revenue. Note the scope before you use that number: it is all-industry, not B2B-only, and skews to companies above $1bn revenue.
How that budget splits matters more than its size. The IPA's work with Les Binet and Peter Field found an optimum of 60:40 brand building to activation in The Long and the Short of It (2013), refined to 62:38 in Effectiveness in Context (2018). Most B2B teams run closer to 20:80 and wonder why demand keeps costing more.
Set a monthly retainer and a split below and see what each buys over a year.
Eleven UK B2B marketing agencies
Eleven real, UK-headquartered B2B marketing agencies from the GTM Quest directory. This is not a ranking — each is strong at something different, which is the whole point of the filter. GTM Quest appears last, marked as the publisher of this guide.
Filter by what you need, the sector you sell into, and the size of team you want to work with.
Agency, in-house, or fractional
An agency is not the only answer, and the honest version of this page says so.
The IPA Agency Census 2025, published 11 February 2026, counted 24,963 people across IPA member agencies — down 6.8% year on year, with creative agencies down 14.3% and under-25s down 19.2%. The agency market is contracting, and some of that capability has moved client-side.
Which of the three fits depends on whether you are buying capability you will keep, or capacity you need now.
PECR, UK GDPR and who you may email
UK B2B marketing runs under the Privacy and Electronic Communications Regulations, and the rules turn on what kind of subscriber you are contacting — not on whether the address looks like a work address.
The ICO's business-to-business marketing guidance is direct about it: "The PECR rule on direct marketing by electronic mail does not apply to corporate subscribers." But it is equally direct that "sole traders and some partnerships are treated by PECR as individual subscribers" — and UK GDPR still applies to the named humans at a corporate body either way.
Ask any agency this before you sign. Check a recipient type below.
Eight things to check before you sign
By the time you are choosing between two agencies, the pitch decks look the same. These are the checks that separate them.
Score a specific agency against the eight. It is not a ranking of the eleven above — it is a way of interrogating whichever one you are actually about to hire.
Anything advertised to you has to be evidenced, too: the CAP Code requires that "marketing communications must not materially mislead or be likely to do so", and B2B marketing additionally sits under the Business Protection from Misleading Marketing Regulations 2008.
If you need one discipline, not all of them
"B2B marketing agency" covers five or six trades that happen to share a label. If you already know which one you need, these go deeper than this page can.
The eleven UK B2B marketing agencies in full
Each agency below has been selected for its track record with UK-based businesses. Ordered alphabetically, not ranked.
Gilroy
Location: Basingstoke, with a London office · Founded: 1974 · Headcount: 48 · Fees: Not published
A full-funnel B2B growth agency uniting sales and marketing through an account-based approach, combining creative, data, MarTech and media. Recognised by B2B Marketing as a top-10 ABM team and a top-30 UK agency, and winner of Silver for Best Use of Creative at the B2B Marketing Awards 2025 for its Thales campaign.
Services: Account-based marketing · B2B media · Demand generation · Creative · Content marketing · Brand activation · Deal-based marketing · MarTech implementation
Gripped
Location: London · Founded: 2017 · Headcount: 11–50 · Fees: from £5,000/month for focused channel work; £8,000–£12,000/month full-service demand generation
A B2B digital marketing agency for SaaS and technology companies from Series A through growth stage, working with founders executing go-to-market, marketing leaders filling skill gaps, and VCs growing SaaS investments. The only agency on this list that publishes a rate card.
Services: Demand generation · Lead generation · Account-based marketing · Content marketing · SEO · Paid media · Inbound · Marketing automation
Lesniak Swann
Location: Stoke-on-Trent, with a Manchester office · Founded: 2002 · Headcount: 30 · Fees: Not published
A B2B agency for brands in complex or highly technical sectors — telecoms, engineering, construction and manufacturing. Named to the inaugural IPA Beacon List as one of only 25 UK agencies recognised for high growth. Acquired HubSpot Platinum partner Don't be Shy in 2024.
Services: Marketing strategy · Advertising · Brand design · Digital · PR · Content · PPC and media · Marketing automation
Napier
Location: Chichester, with London and San Francisco Bay Area offices · Founded: 1984 · Fees: Not published
A PR-led, full-service B2B technology agency and a pan-European specialist in electronics, IT and industrial technology. A member of Eurocom Worldwide, and a regular in the PR Week Top 40 Technology Consultancies.
Services: Technology PR · Media relations · Analyst relations · Content · Account-based marketing · Corporate and internal communications
Radish
Location: London · Founded: 2013 · Fees: Not published
An ABM and brand agency for global B2B brands, founded by Lorna Charlish and Renaye Edwards and now part of the Selbey Anderson group. Won B2B Marketing Agency of the Year at the 2021 B2B Marketing Awards.
Services: Account-based marketing · Brand strategy · ABM account selection · Creative campaigns · Content strategy · Sales enablement · Video
Six & Flow
Location: Manchester, with London and Toronto offices · Founded: 2015 · Fees: £6,000–£15,000/month (directory estimate, not a published rate card)
A go-to-market and revenue operations agency built on HubSpot — the first UK HubSpot Elite Solutions Partner outside London, and one of a small number in EMEA with that designation. Strongest where the brief is as much systems as campaigns.
Services: HubSpot architecture and implementation · Revenue operations · GTM technology · Marketing–sales alignment · Lead lifecycle · Attribution reporting
Strategic ABM
Location: United Kingdom · Fees: Not published
An ABM-only agency working exclusively with B2B technology brands, running one-to-one, one-to-few and one-to-many programmes and building in-house ABM capability through training rather than only executing campaigns.
Services: Account-based marketing · ABM strategy and training · One-to-one, one-to-few and one-to-many ABM · Sales–marketing alignment
The Marketing Practice
Location: Oxfordshire, with London, Munich, Denver and Sydney offices · Founded: 2002 · Headcount: 400 · Fees: Not published
The second-largest B2B agency group globally and the market leader in technology marketing, founded by former IT marketing director Clive McNamara and grown through acquisitions including Omobono, 90octane, Campaign Stars and Rombii. Clients include AWS, ServiceNow, Microsoft, Salesforce, HPE, Palo Alto Networks and SAP.
Services: Account-based marketing · Demand generation · Brand development · Strategic planning · Media and channel marketing · Digital experiences
The Think Tank
Location: Holborn, London · Fees: Not published
A fully integrated B2B marketing, PR and digital agency, and by its own count the most awarded UK agency of 2023/2024 with 64 nominations and 19 wins, including Marketing Agency of the Year 2023. Sector strength in manufacturing, materials, financial and professional services, renewables, aviation and logistics.
Services: B2B marketing strategy · Press and media relations · Digital · Content · Brand · Website design · Video · LinkedIn and ABM campaigns
Transmission
Location: London · Founded: 2013 · Fees: Not published
The world's largest independent B2B marketing agency, founded in London by Chris Bagnall, acquired by Bain Capital Tech Opportunities in 2021, and itself the acquirer of Earnest in 2025. Serves enterprise technology, finance and professional services globally.
Services: B2B strategy · Go-to-market planning · Creative · Demand generation · Account-based marketing · Marketing technology · Content · Brand positioning
Velo B2B
Location: London SE1 · Founded: 2010 · Fees: Not published
A specialist B2B agency working with clients targeting niches in technology, industrial and professional services, producing websites built around original photography, video and copy. Clients include Troup Bywaters + Anders and the Cisco Lifecycle Advantage programme.
Services: Niche B2B marketing · Account-based marketing · Brand strategy · Website design · Sales enablement · Photography and video · Email
GTM Quest Publisher of this guide
Location: London · Founded: 2024 · Fees: £5,000–£15,000/month
We publish this directory, so we list ourselves last and label it. GTM Quest builds four-channel go-to-market systems for B2B SaaS and technology companies — LinkedIn, content, intent and outbound — with an explicit handover option so the system stays with your team.
Also frequently shortlisted
These UK B2B agencies appear on most comparable lists, including earlier versions of this page, but are not currently in the GTM Quest directory and so are not in the filter above: Velocity Partners (London, B2B content marketing), Alan Agency (London, B2B creative and brand), Ledger Bennett (Milton Keynes, demand generation), MOI Global (London, B2B campaigns) and Fifty Five and Five (London, Microsoft partner marketing).
Two corrections to earlier versions of this guide. Earnest was previously listed here as an independent agency; it was acquired by Transmission in 2025 and is no longer separately bookable. Cognism and Squiz were also previously listed; Cognism is a B2B sales-intelligence data platform and Squiz is a digital experience platform vendor, and neither is a marketing agency. They have been removed.
How to choose a B2B marketing agency in the UK
Weigh sector focus, channel mix and whether the team executes campaigns or only advises. Match that against your budget and target accounts before you shortlist.
Evaluation criteria
| Factor | Questions to ask |
|---|---|
| Industry expertise | Do they understand your market? |
| Service fit | Do their capabilities match your needs? |
| Team quality | Who will actually work on your account? |
| Process maturity | How do they manage projects and communication? |
| Measurement approach | How do they prove ROI? |
Agency models
UK agencies operate various models:
- Full-service agencies: end-to-end marketing support
- Specialist agencies: deep expertise in specific areas
- Demand generation agencies: focus on pipeline and revenue
- Creative agencies: brand and campaign development
- Technology agencies: MarTech implementation and optimisation
- Membership marketing agencies: subscription and recurring revenue growth specialists
Budget considerations
UK agency pricing varies significantly. These are ranges observed across the UK market by GTM Quest, not published rate cards — only one of the eleven agencies above publishes its fees.
| Service level | Monthly retainer range |
|---|---|
| Project work | £5,000–£20,000 per project |
| Tactical support | £5,000–£15,000/month |
| Strategic partnership | £15,000–£40,000/month |
| Enterprise programmes | £40,000+/month |
Key B2B marketing services
Demand generation
UK agencies excel at demand generation for:
- Technology companies entering European markets
- SaaS businesses scaling across EMEA
- Professional services firms building pipeline
- Financial services marketing within regulations
Prefer a named-account approach?
Several agencies above offer account-based marketing as part of a broader service mix. If a named-account approach is your primary need rather than one channel among several, see our dedicated ABM agency UK guide — it covers ABM Light vs full ABM pricing, GDPR-compliant data practices, and a ranked shortlist of ABM-specialist UK agencies in far more depth than fits here.
Content marketing
B2B content services encompass:
- Thought leadership development
- Technical content creation
- Video and multimedia production
- Podcast strategy and production
- Distribution and amplification
Marketing technology
MarTech expertise covers:
- Platform selection and implementation
- HubSpot, Marketo and Pardot optimisation
- CRM integration and configuration
- Analytics and attribution setup
- Automation workflow development
Regional considerations
London hosts the largest concentration of B2B agencies, with access to global talent, proximity to enterprise headquarters, international client experience, and premium positioning and pricing. Outside London, agencies offer competitive pricing structures, strong local market knowledge, dedicated account attention and industry-specific expertise — five of the eleven above are headquartered outside London.
For context on the market these agencies operate in: the Advertising Association/WARC Expenditure Report put UK advertising investment at £46.7bn in 2025 and forecasts it passing £50bn for the first time in 2026, while the ONS counted 2.73 million VAT and/or PAYE-registered businesses in the UK as of March 2025 — the addressable market every one of these agencies is selling into.
Working with UK agencies
Engagement best practices
- Clear briefing and objective setting
- Regular communication and feedback
- Access to internal stakeholders
- Realistic timelines and expectations
- Shared success metrics
Common challenges
- Insufficient internal resources for collaboration
- Unclear ownership and decision rights
- Scope creep without budget adjustment
- Misaligned expectations on deliverables
- Inadequate performance measurement
Conclusion
Choosing the right B2B marketing agency is one of the most important decisions a UK business can make. The agencies listed above represent the best of British B2B marketing — each combining creativity with commercial focus. Evaluate potential partners on industry fit, capability match and cultural alignment to find the right B2B marketing agency for your growth objectives.
B2B marketing agency FAQ
Sources
Every figure on this page cites a named primary source. Where a widely quoted figure could not be traced to a live primary source, it has been left off rather than attributed loosely.
- Office for National Statistics, UK business: activity, size and location: 2025, 24 September 2025 — 2.73 million VAT/PAYE-registered UK businesses as of March 2025.
- IPA, Agency Census 2025, published 11 February 2026 — 24,963 people across IPA member agencies, down 6.8% year on year.
- IPA, "The next chapter for The Long and The Short of It", 13 September 2023 — Binet & Field's 60:40 brand-to-activation optimum (2013), refined to 62:38 in Effectiveness in Context (2018).
- Gartner, 2026 CMO Spend Survey, published 11 May 2026 — marketing budgets averaging 7.8% of company revenue; 401 respondents across North America, the UK and Europe, fielded January–March 2026.
- Gartner, "67% of B2B buyers prefer a rep-free experience", 9 March 2026 — survey of 646 B2B buyers fielded August–September 2025.
- Information Commissioner's Office, Business to business marketing, page dated 22 May 2025.
- The Privacy and Electronic Communications (EC Directive) Regulations 2003, reg. 22 — amended 5 February 2026 by the Data (Use and Access) Act 2025.
- Advertising Standards Authority / CAP, Misleading advertising — CAP Code rules 3.1 and 3.7, and the Business Protection from Misleading Marketing Regulations 2008.
- Advertising Association / WARC, Expenditure Report, updated 30 April 2026 — UK advertising investment of £46.7bn in 2025.
- Ehrenberg-Bass Institute, "The 95:5 rule", and Prof. John Dawes' own statement of the rule and its caveat, 2021.
- Companies House, Search the register — for verifying any UK agency's registration, accounts and officers.
Two figures deliberately omitted. The widely quoted "B2B buyers spend only 17% of their time with sales reps" and "6 to 10 decision makers per buying group" are both attributed to Gartner across the industry, but neither appears on any live Gartner page we could find — every trace is a third party citing Gartner. They have been left out rather than cited loosely, and the current, sourceable Gartner figure is used instead.
Not sure whether you need an agency, a consultant or a system your own team runs? That is the conversation we have on a first call.