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Agency Rankings · Updated August 2026

The 10 Best Marketing Agencies in UK

Compare the top marketing agencies in United Kingdom for 2026 — ranked by client reviews, pricing, campaign results, and verified clients

1,000+ agencies evaluated 6 scoring factors 15,000+ client reviews analyzed
What the score bar shows
Client reviews 25% Verified clients 20% Campaign results 15% Pricing transparency 10% Team size and seniority 10%
★ Best Overall
1
Definition

Definition

London, England · Founded 2008 · 50–249 people · hypeandhoney.com ↗

Definition crafts brand strategy, creative and film-led content and integrated marketing to align purpose and experience for corporate and consumer clients such as HSBC and Merlin Entertainments.

Avg. rating 4.9 (25 reviews) Named clients 20 Published case studies 16 Min. budget published
98IC Score / 100
2
Impression

Impression

Nottingham, England · Founded 2012 · 50–249 people · impressiondigital.com ↗

Impression applies experimentation-led performance marketing across SEO, paid media, digital PR, strategy, digital experience and creative, serving travel and retail brands such as Wizz Air and Clarins.

Avg. rating 4.9 (73 reviews) Named clients 13 Published case studies 12 Min. budget published
96IC Score / 100
3
NOVOS

NOVOS

London, England · Founded 2018 · 10–49 people · thisisnovos.com ↗

NOVOS is an eCommerce discovery agency combining SEO, paid media and AI-driven visibility, embedding senior strategists into teams to grow consumer brands like The Body Shop and Osprey.

Avg. rating 5 (36 reviews) Named clients 20 Published case studies 14 Min. budget published
96IC Score / 100

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4
Candidsky

Candidsky

Manchester, England · Founded 2006 · 10–49 people · candidsky.com ↗

Candidsky is a Manchester-based, performance-focused agency delivering SEO and paid-media campaigns to boost brand visibility for clients such as Citation Group and Yamaha Music Group.

Avg. rating 5 (26 reviews) Named clients 18 Published case studies 10 Min. budget published
96IC Score / 100
5
The One Off

The One Off

Derbyshire, England · Founded 2003 · 50–249 people · theoneoff.com ↗

The One Off is an integrated creative agency delivering advertising, branding, communications, digital and interior architecture for consumer brands and retailers, including Nike and Samsung.

Avg. rating 4.5 (24 reviews) Named clients 20 Published case studies 18 Min. budget published
96IC Score / 100
6
RevWise

RevWise

Colchester, England · Founded 2023 · 50–249 people · revwise.com ↗

RevWise specialises in affiliate programme management and TikTok Shop services for ecommerce and DTC brands, running partner recruitment, commission optimisation and shop setup, including Vitl.

Avg. rating 5 (25 reviews) Named clients 19 Published case studies 19 Min. budget published
95IC Score / 100
7
M3.agency

M3.agency

Birmingham, England · Founded 1999 · 50–249 people · m3.agency ↗

M3.agency delivers bespoke digital marketing—SEO, PPC, paid social and content—for consumer and corporate brands, working with clients such as Disney and Aston Villa Football Club.

Avg. rating 5 (21 reviews) Named clients 20 Published case studies 17 Min. budget published
95IC Score / 100
8
OOB

OOB

London, England · Founded 2018 · 10–49 people · ourownbrand.co ↗

OOB crafts social-led strategy and scroll-stopping content for consumer brands, specialising in TikTok and culture-driven campaigns for clients such as Ann Summers and Natural Cycles.

Avg. rating 5 (58 reviews) Named clients 20 Published case studies 30 Min. budget published
95IC Score / 100
9
MADX Digital

MADX Digital

London, England · Founded 2020 · 10–49 people · madx.digital ↗

MADX Digital specializes in AI-driven search and SEO for B2B SaaS, using technical SEO, content strategy and link acquisition to convert organic visibility into demos and recurring revenue. Clients include MoonPay and Veed.

Avg. rating 4.9 (29 reviews) Named clients 20 Published case studies 13 Min. budget published
95IC Score / 100
10
Noise Media Group

Noise Media Group

London, England · Founded 2018 · 10–49 people · noisemediagroup.co.uk ↗

Noise Media Group is a social-first marketing agency combining paid and organic social, creative content and full-funnel performance strategies to scale DTC brands like Just Eat and Davines.

Avg. rating 4.8 (18 reviews) Named clients 20 Published case studies 13 Min. budget published
95IC Score / 100

How we score agencies

Every agency gets an IC Score out of 100, built from seven weighted factors. All inputs come from publicly available information — review platforms, the agencies' own websites. Scores are refreshed monthly.

25%

Client reviews

Average rating across major review platforms, adjusted for review volume so 5 reviews can't beat 300.

20%

Verified clients

Named clients and brand logos we could verify against public sources.

15%

Campaign track record

Published case studies with concrete, checkable results.

10%

Pricing transparency

Published pricing, minimum budgets, or rate ranges score higher than "contact us."

20%

Niche specialization

Share of public work and case studies in this specific niche.

10%

Team & stability

Years in operation and team size, from public company information.

Scores reflect publicly available information as of August 2026 and are opinions based on the methodology above, not statements of fact about service quality.

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