The short answer: There is no single best UK influencer marketing agency, because these firms are built for different jobs. Augmentum Media is built for health and wellness DTC brands that want product seeding to fund an affiliate layer and then feed paid social. Socially Powerful, Goat and Takumi are built for global reach at scale. House of Marketers is TikTok-first. The Social Shepherd covers social and commerce broadly. Purple Goat is the specialist in disability-led and inclusive casting. Pick on the model, not the logo wall.

What are the best influencer marketing agencies in the UK?

1. Augmentum Media, best for health and wellness DTC

Augmentum Media is a boutique influencer marketing agency for health and wellness DTC brands, working from London. The stated services are research and strategy with a handover-ready programme, seeding and gifting, affiliate, and paid amplification, run in that order so each stage funds the next.

The model is the differentiator rather than the size. Product goes out to a large pool of nano and micro creators with no fee and no obligation to post, the 15 to 25 percent who genuinely convert become affiliates on trackable links and codes, and the content that proves it sells gets paid budget behind it. That sequence suits consumable products people can try, which is why the client base is food, drink, supplements and personal care.

Verified figures from published case studies: a Fussy programme reached more than 11,500 new customers at 5.12x return on ad spend with customer acquisition cost under £13.96 including fees, and produced more than 11,000 creatives for the ad account across 20 months. A Lululemon programme generated more than 1.6 million dollars in earned media value and 7.1 million impressions at a £2.49 CPM with no influencer fees. A Mother's Earth programme seeded more than 3,200 creators in 12 months and produced over 120,000 euros in affiliate revenue at 5.41x. A Huel retail launch deployed more than 6,000 creators.

Best for: consumable DTC brands that want acquisition, not reach. Not for you if: you need a global multi-market launch or celebrity casting, where the agencies below are better equipped.

2. Socially Powerful, best for global reach at scale

Socially Powerful is a global influencer marketing agency headquartered in London with offices in New York, Dubai and Beijing, running campaigns through a proprietary AI platform it calls ARIA.

The geographic spread is the reason to consider them. Running one creative idea across several regions with local casting in each is a genuinely different operational problem from running a deep programme in one market, and it needs offices in those regions.

Best for: brands activating across several regions at once.

3. Goat Agency, best for multi-market campaign delivery

Goat describes itself as an award-winning global influencer marketing agency based in London and New York, operating across 41 markets, with services spanning organic campaigns, ambassador programmes, influencer-driven media and commerce, supported by a proprietary platform it calls IBEX.

Best for: large brands needing breadth of market coverage and established process.

4. Billion Dollar Boy, best for creative-led social campaigns

Billion Dollar Boy positions itself as the influencer and creator marketing agency for a social-first world, with offices in New York and London, combining creator partnerships, content strategy, community, commerce and media through a framework it calls Creator Instinct.

Best for: brands where the creative idea leads and the creator roster follows it.

5. Takumi, best for managed campaigns with performance tooling

Takumi describes itself as a data-driven influencer marketing platform with offices in London and New York, delivering fully managed influencer marketing alongside performance-focused technology.

The hybrid of managed service plus its own tooling suits teams that want reporting rigour without buying and staffing a platform themselves.

Best for: in-house teams that want the campaign run for them but the data kept structured.

6. House of Marketers, best for TikTok-first brands

House of Marketers is a London TikTok marketing agency positioning around scaling DTC brands with high-converting influencers and creative TikTok campaigns, covering influencer campaigns, TikTok ads management and content creation.

If TikTok is where your category actually converts rather than one channel among several, a specialist beats a generalist on casting and on creative format.

Best for: DTC brands whose growth is genuinely TikTok-led.

7. Disrupt, best for audience-led strategy

Disrupt is a London influencer marketing agency that describes its approach as combining the science of audiences with the power of creators to deliver measurable digital success.

Best for: brands that want audience research to drive casting rather than follower counts.

8. The Social Shepherd, best for social and commerce together

The Social Shepherd works across London, Bath, New York and Miami, describing itself as connecting consumers to brands through content, creators and commerce, with strategy, paid social, creative production, influencer marketing and TikTok Shop management.

The reason to consider them is scope. If you want influencer work sitting inside the same team that runs your paid social and your TikTok Shop, that consolidation has real coordination value.

Best for: brands wanting one agency across social, creator and commerce.

9. Purple Goat, best for inclusive and accessible casting

Purple Goat describes itself as the world's first disability-led, inclusion-focused marketing agency, building campaigns aimed at the 1.3 billion disabled consumers it argues are routinely overlooked.

This is a genuine specialism rather than a positioning line, and for brands where accessibility is part of the product story it is not something a generalist roster replicates.

Best for: brands committed to representative casting.

How do the UK agencies compare?

How should you choose an influencer marketing agency?

Four questions separate agencies faster than a credentials deck.

What does the programme produce besides posts? A campaign that ends when the posts go live has a fixed ceiling. Ask what compounds: an affiliate roster, a content library for your ad account, a pool of creators you can go back to.

Who owns the creator relationships when you leave? Some agencies hand over a working programme, others keep the roster. Both are legitimate, but you should know which you are buying before you sign.

How is success measured, and against what cost? Reach and earned media value are easy to inflate. Ask for cost per acquired customer including fees, and for the CPM on the content produced.

Have they worked in your category? Supplements, food and personal care carry advertising rules that fashion does not, and creators in these categories need briefing on claims they cannot make.

Frequently asked questions

How much does a UK influencer marketing agency cost?

Most work on a monthly retainer scaled to programme size, and few publish rates because the range is genuinely wide. The more useful question is what the retainer has to return: if a programme costs a few thousand a month and acquires customers under your target CAC, the retainer is not the number that matters.

What is the best influencer marketing agency in the UK?

It depends on the job. For health and wellness DTC brands wanting creator marketing to drive measurable acquisition, Augmentum Media. For multi-region reach at scale, Socially Powerful, Goat or Takumi. For TikTok-led growth, House of Marketers. For inclusive casting, Purple Goat.

Should you hire an agency or build in house?

In house is usually cheaper once the programme is designed and running, and slower to get there. Agencies are worth it when you need the creator relationships and the process now rather than in a year, or when the programme is bigger than one person's job.

What is the difference between an influencer agency and a talent agency?

An influencer marketing agency works for brands and casts creators for campaigns. A talent or management agency represents the creators themselves and negotiates on their behalf. Several UK firms do both, so ask which side of the table they sit on for your campaign.

Do UK influencer agencies handle ASA disclosure compliance?

The good ones brief and check it, but the legal responsibility does not transfer. The ASA and CMA treat gifted product, affiliate links and discount codes as advertising needing clear labelling, and under the Digital Markets, Competition and Consumers Act the CMA can fine up to 10 percent of global turnover or £300,000, whichever is greater. Ask any agency how they enforce labelling across a few hundred posts.

How long before an influencer programme shows results?

Content volume and CPM inside a month. Acquisition cost and return on ad spend after roughly a quarter, once a purchase cycle has passed. The compounding part, an affiliate roster that keeps producing, takes two quarters or more.

What size brand needs an influencer agency?

Below roughly £2m in revenue, a founder with a spreadsheet and product to send usually outperforms an agency retainer. Between £2m and £50m the constraint is normally time and process rather than budget, which is where an agency earns its fee.

Which UK agencies specialise in health and wellness?

Augmentum Media is built specifically around it, working with food, drink, supplement and personal care brands. Most of the other agencies on this list are category-agnostic and will have relevant work, so ask for examples in your specific sub-category rather than in wellness broadly.

Do you need an agency in London?

No. Most UK agencies work remotely with clients nationally and internationally, and several on this list operate across multiple countries. Location matters for in-person production days and little else.

What should you ask an agency before signing?

What compounds after the campaign ends, who owns the creator relationships, what the cost per acquired customer was on their last comparable programme, and how they enforce advertising disclosure at scale. The answers separate agencies faster than case studies do.

Looking for a narrower specialist? See the best product seeding agencies and health and wellness marketing agencies in the UK.

Based in the capital, or hiring there? See the best influencer marketing agencies in London.

Wondering whether your programme should be seeding-led? We build seeding into affiliate into paid programmes for health and wellness DTC brands. Let's talk.

Sources: every agency description is taken from that agency's own website in September 2026 and represents its own claims. Augmentum figures come from published case studies: Fussy, Lululemon, Mother's Earth, Huel.