Top 9 Influencer Marketing Agencies in London in 2026

Founded in London in 2015, The Goat Agency is one of the most recognized influencer agencies in the British market. In 2023, WPP acquired it and merged it with INCA (GroupM Nexus), giving it global infrastructure. In 2026, it has 650 staff across 37 markets and 6 continents, with its proprietary IBEX platform (AI-powered discovery and data analytics drawn from 10 years of campaigns).

It guarantees deliverables upfront: before a campaign starts, the client knows exactly what they will get. Clients: Unilever, NIVEA, Dell, Audi, Pernod Ricard, Mars, Wayfair, UEFA, Ford, IBM, NatWest, Tesco.

Its annual "Unfiltered" report on creator trends is a reference resource for the UK industry.

Clark Influence ranks second in the London ranking for a precise reason: it is the best option for brands managing their influencer campaigns simultaneously in France and the UK and seeking cross-border creative consistency.

Its Paris office (122 rue Amelot, Paris 11th), its North American roots (Montreal and Austin) and its portfolio of international clients (Adidas, NIVEA, Spotify, Airbnb) demonstrate proven cross-border capability. Its compliance with the French 2023 law on partnership transparency is directly applicable to UK ASA rules.

For brands that want to avoid fragmentation (one agency in France, another in the UK) in favor of a unified social strategy, Clark Influence is the natural partner from Paris.

Founded in London in 2014 by Ed East, Billion Dollar Boy is the most awarded influencer agency of 2025-2026: Ad Age A-List Social Media/Influencer Agency of the Year 2026, Adweek Social Media Agency of the Year 2025, Cannes Lions, Eurobest, Webby Awards. Its Creator Instinct philosophy produces campaigns co-created with creators, not simply distributed by them.

In May 2026, BDB launched regional Social Hubs to anchor its local presence in key markets. Its EZY platform manages the campaign production chain. Clients: L'Oréal, PepsiCo, Heineken, Versace, Burberry, Nintendo, Amazon, EA Games.

Brainlabs is a full-service digital agency founded in London in 2012 by Daniel Gilbert. In 2022, it acquired Fanbytes, a TikTok Gen Z specialist founded in 2017 by Timothy Armoo. This combination produces a rare offering: Fanbytes' native TikTok expertise (Bytesights, a platform of 3 million influencers) plus Brainlabs' media, data and paid power.

In 2024, Brainlabs won the Google Agency Excellence Award for Creative Coverage in EMEA. Clients: Warner Music Group, Boohoo, Estée Lauder, HM Government, H&M, Nike, Samsung, Deliveroo.

Buttermilk is a "community-first" London agency founded in London, with 129 staff across three offices (London, Miami, Dubai). It creates influencer campaigns centered on authentic storytelling and long-term partnerships with creators, with access to 270,000 creators worldwide.

Its average engagement rate of 8% (versus a 2% industry average) on its campaigns is its strongest argument. It excels in luxury and fashion: Dior, Prada, Armani Beauty, Boots, Deliveroo, Primark.

Founded in 2016 in London, Seen Connects is a cultural influencer agency recognized for its "archetypal alignment" approach: it aligns a brand's deep values with creators who share the same values, producing authentic, lasting collaborations. Clients: eBay, Nike, John Lewis.

Its "Always-On Network" service offers continuous influence support, suited to brands seeking a permanent presence rather than one-off campaigns.

Founded in London in 2017, Digital Voices is an influencer agency specializing in high-ROI campaigns. It was named Influencer Marketing Agency of the Year 2022 and claims a performance, not vanity, positioning. It expanded with offices in New York and Costa Rica, before being acquired by PMG in January 2026.

Clients: Unilever, Yoplait, Adobe.

Founded in London in 2017, an agency selected by TikTok since 2018 for its launch in Western Europe. Its performance guarantee (no payment if KPIs are not met) is a rare model in the London market. 500 million impressions delivered. Clients: Adidas, L'Oréal, Samsung.

A creator economy pioneer founded in London in 2016, merged with Sixteenth in 2024. 160 countries. Clients: Adidas, Nike, Samsung, Spotify. Its "creator economy" model aligns the interests of creators and brands in long-term partnerships.