Top Content Marketing and Thought Leadership Agencies in the UK (2025)
In today’s B2B marketing landscape, content is king — but not all content is created equal. The UK is home to a thriving ecosystem of specialist content marketing and thought leadership agencies that help brands tell compelling stories, drive engagement, and position themselves as industry leaders.
As part of the B2B Marketing UK Agencies Benchmarking Report 2025, agencies were asked to identify their core service specialisms. This list ranks those that selected content marketing and thought leadership — including copywriting, storytelling, video, and editing — among their top three services, sorted by UK Gross Income (GI).
Here are the top players in the field:
Edelman
UK GI: £76.6m | Headcount: 621
A global powerhouse in strategic communications, Edelman leads the UK market for content marketing and thought leadership. Their work spans high-end storytelling, executive thought leadership, and multimedia campaigns.
dentsu B2B
UK GI: £39.9m | Headcount: 276
Dentsu B2B leverages its network strength with deep expertise in digital, creative, and content marketing for complex B2B environments.
McCann Enterprise
UK GI: £12.8m | Headcount: 71
Renowned for blending creativity with business insight, McCann Enterprise produces standout content strategies that drive brand growth.
Fox Agency
UK GI: £8.5m | Headcount: 61
With a strong focus on tech and B2B industries, Fox Agency delivers high-impact campaigns built around thought leadership.
Nelson Bostock
UK GI: £7.8m | Headcount: 65
Part of the Unlimited Group, Nelson Bostock is known for integrating PR and content marketing to build trust and visibility.
Barrett Dixon Bell Ltd (BDB)
UK GI: £7.1m | Headcount: 58
BDB specialises in complex B2B sectors, particularly in science, engineering, and industrial markets — bringing niche expertise to their content work.
The SEO Works
UK GI: £6.6m | Headcount: 81
This award-winning agency combines SEO with content marketing, ensuring that great stories are not just created but also found.
Publicis Pro
UK GI: £6m | Headcount: 51
A key player in integrated marketing, Publicis Pro helps brands turn insights into powerful, audience-driven content.
CCGroup
UK GI: £5.7m | Headcount: 33
CCGroup blends PR, analyst relations, and content marketing with a strong focus on tech sectors such as telecoms and fintech.
Gilroy
UK GI: £5.4m | Headcount: 40
Known for blending creativity with data, Gilroy builds thought leadership platforms that deliver measurable business results.
Fight or Flight
(£5.2m) – A creative agency with bold storytelling at its heart.
Man Bites Dog
(£4.8m) – Strategic thought leadership for professional services and knowledge economy brands.
Luxid Group UK Ltd
(£4.4m) – Specialists in performance-driven content marketing.
Page & Page
(£4.1m) – Experts in content that moves minds in healthcare and life sciences.
The Think Tank
(£4m) – Multi-award-winning B2B agency with a flair for content creation.
The challenge
Asendia is a global leader in e-commerce and logistics solutions, helping retailers expand internationally.
Having partnered with The Think Tank for over 12 years, they tasked us with developing a brand strategy for 2024 to boost awareness, generate leads and cement their position in the e-commerce space. The campaign needed to gain traction across Asendia’s key markets, including the USA, UK and Nordics, as well as APAC, Germany, Italy and Spain, ensuring an integrated yet locally relevant approach.
The solution
We developed a multi-faceted strategy to position Asendia at the heart of the global e-commerce conversation and in front of key retail decision-makers. Central to this was Global Retail Voices, a campaign celebrating industry leaders shaping the sector across areas such as sustainability, technology and innovation. To ensure local relevance, it was also segmented by retail category and region.
Following extensive research, we identified 50 influential retail figures from an initial list of 200 and reached out for their approval and engagement. The final selection was showcased in an eBook, featuring expert commentary from industry spokespeople, supported by a range of blog and social content. Each leader received digital assets, including badges and banners, to share their inclusion across online channels.
The campaign launched in two phases, using LinkedIn Thought Leader and Lead Generation ads, Google Display, Google Retargeting, targeted emails, organic content and PR. Together, these elements boosted brand visibility, encouraged engagement with industry leaders and delivered marketing-qualified leads.
The results
The Global Retail Voices campaign was a resounding success, driving significant awareness within the global retail community and, crucially, among C-suite decision-makers. It demonstrated our ability to create impact on an international scale.
By combining Google Display, LinkedIn Sponsored Posts, PR, organic social and direct marketing, we delivered outstanding results:
2,117 eBook downloads
58 articles
5.9m impressions across 7 regions
22,324 clicks
33% LinkedIn Follower growth
This comprehensive, multi-channel approach not only boosted awareness for Asendia but also underscored the brand’s position as a forward-thinking leader in e-commerce and logistics. Generating significant buzz across multiple regions, our client was delighted with the campaign.
Why It Matters
Hiring the right content marketing and thought leadership agency can help businesses:
✅ Build brand authority
✅ Engage target audiences
✅ Support lead generation
✅ Drive SEO and discoverability
✅ Enhance executive reputation
As companies face increasing demand to educate buyers and influence industry conversations, these agencies are providing the expertise to meet those goals.
Final Thoughts
The UK’s content marketing and thought leadership scene is vibrant and growing — from global giants like Edelman to niche players like Man Bites Dog. Whether you’re a scale-up looking to establish credibility or a blue-chip enterprise seeking new narratives, this list offers an excellent starting point.