Understanding digital behavior, or designing customer experiences, these London-based agencies collectively represent the pinnacle of UK market research capability.
1. Kantar Group
Founded: 1992 (as WPP’s insights arm)
CEO: Chris Jansen; UK Senior Partner: Simon Bailey
HQ: London
Overview: One of the largest UK-founded research firms, Kantar evolved from WPP subsidiaries TNS, Millward Brown, and more into a unified global powerhouse with 30,000 employees across 90 countries.
Specialisms: Advertising effectiveness, consumer and shopper behavior, brand strategy, media measurement, public opinion tracking.
Notable Projects: Major studies on media consumption, brand equity diagnostics, and behavior panels across global markets.
2. Vision One
Established: 2010s; based in London
Awards: The Drum’s Best Market Research Agency (2020 & 2021)
Overview: An award-winning boutique agency praised for its client-focused B2B research.
Vision One supports sectors including housing, public services, healthcare, and charities.
Services: Quantitative surveys, qualitative interviews, customer insights, segmentation and strategy modeling.
Feedback: Clients highlight excellent communication, clarity around findings, and above-average value projects typically cost £10K–£50K.
3. Brandspeak – Brand & Customer Research
Founded: 2004
Location: London (plus Bristol, Birmingham)
Key People: Jeremy and Lauren lead research teams in London
Specialisms: B2B & B2C research, ethnography, neuromarketing, customer experience, brand tracking, and food & drink sector research.
Why They Stand Out: Known for combining deep qualitative insight with atlantic-level strategic thinking. Supported by strong account management and honored for responsiveness.
4. B2B International (London Office)
Founder Location: Manchester HQ; full-service London team
Office Address: 10 Triton Street, London NW1 3BF (near Euston)
Key People: Tom Percival (Business Development Director), Louise Coy (Research Director)
Focus: Pure B2B research for corporate, industrial, and public sector clients. They’ve supported over 850 major brands globally.
Signature Capabilities: Branding research, pricing strategy, product innovation testing, and global client benchmarking.
Choosing the Right Agency: A Quick Guide
For enterprise-scale, strategic research or syndicated data: Kantar Group
For trusted B2B insight with professional front-end service: Vision One or B2B International
For rich qualitative storytelling, brand strategy, and segmentation: Brandspeak
For digital usability and user journey insight: Kantar Group
For agile consumers metrics and fast turnaround surveys: Vision One
Industry Legacy and Trust
Many of these firms are part of the Market Research Society (MRS) established in London in 1946 to advance professional standards in the field. Kantar, Vision One, B2B International, and Brandspeak all play active roles in this community, maintaining credibility and compliance standards.
