Influencer marketing platform vs agency: which is better? (2026)

Brands measure influencer marketing ROI by comparing campaign costs with the value generated through engagement, traffic, and sales. Marketers typically track metrics such as earned media value (EMV), engagement rate, conversions, and cost per acquisition (CPA) to evaluate performance.

Yes. In the UK, the ASA and CMA oversee influencer marketing. Ads must be clearly disclosed with #ad, #gifted, Paid Partnership, or a similar label to avoid penalties.

Earned media value (EMV) is an estimate of how much the reach, impressions, and engagements generated by a campaign would have cost to generate through other digital marketing channels.

Instagram is the most popular influencer marketing platform in the UK, chosen by 92% of brands and agencies, according to Kolsquare’s State of Influencer Marketing Report. TikTok, YouTube, and LinkedIn are also popular choices.

Influencer marketing budgets continue to grow in 2026, with brands now allocating between 20% and 30% of their total marketing spend to creator collaborations and up to 50% among digital-first brands. This growth reflects a shift from one-off sponsorships to full-funnel strategies combining awareness, engagement, and conversion.

Average fees vary widely depending on the platform, creator tier, and campaign scope. While Instagram remains a key driver for brand visibility, TikTok dominates short-form engagement and YouTube commands higher investments due to long-form storytelling and production value. However, the era of fixed “price-per-post” grids is over. Pricing now depends on objectives, deliverables, and metrics, whether that’s EMV, affiliate sales, or UGC production.

Pricing models also differ: some creators charge flat fees, others link compensation to performance. Industry and region also influence costs. Beauty, fashion, and luxury often command higher rates than tech or B2B sectors, and fees in France or the UK are generally above Southern European averages.

2026’s influencer marketing is closer to media investment than PR spend. Campaigns that combine organic content, paid amplification, and creative storytelling deliver stronger returns, but also require bigger budgets and greater precision in planning.

As influence becomes more professionalised, costs reflect not only visibility but also the discipline, creativity, and trust that creators bring to sustained brand growth.

Learn more insights from Kolsquare’s latest Influencer Marketing Budget Report.

Influencer marketing is a type of social media marketing where companies collaborate with people who have significant (typically above 5,000 followers) accounts.

The first step is selecting influencers with audiences that align with your target demographic and campaign goals. Then, you encourage or pay the creator to post content featuring your brand.

Influencers promote products or services in many ways, including:

• Sponsored posts: This is a fixed-fee approach. You pay influencers upfront to create content featuring your product or service. For compliance, posts must be tagged clearly, such as #ad or #sponsored. This tactic is collaborative, formal, and controlled.
• Affiliate marketing: This is pay-by-commission influencer marketing. Here, influencers share unique referral links or discount codes. When a consumer makes a purchase that links back to the influencer, they are paid a percentage of the sale price. This approach is popular for e-commerce brands that need to pindown ROI. It is also a growing tactic as more marketers' budgets tighten.
• Product reviews and gifting: Not all influencer marketing is expensive. This tactic encourages influencers to test and review products. These reviews build trust and provide social proof. They're also great for product launches. Sometimes, these reviews are organic, and influencers simply promote a product they love. Others may result from brands running gifting campaigns.
• Giveaways and contests: What better way to get audiences involved than offering the chance to win a freebie? Influencers host giveaways, encouraging followers to like, share, or tag friends for a chance to win prizes. This boosts engagement, expands reach, and can lead to user-generated content.
• Pre-launch content: Give influencers early access to products or services, and they can create content to build anticipation before an official launch. This creates hype and exclusivity.
• Brand ambassadorships: Long-term collaborations build value. When influencers consistently promote a brand's products or services, the audience believes the recommendation. Yes, ambassadorships cost more, and you need to be more hands-on. But get it right, and this is one of the most beneficial tactics. Over time, you gain more credibility and trust with the influencer's audience.
• Co-creating products: Work with influencers to develop exclusive products. These often limited-edition items create hype with followers and can easily sell out.

Put simply, influencer marketing is a form of social media marketing where brands collaborate with popular individuals to promote products or services.

Brands find these influencers appealing because they have established credibility and a loyal following within specific niches, such as fashion, beauty, fitness, or gaming.

Influencer marketing remains highly effective in 2026, but brands can no longer rely on basic campaigns to gain traction. Brands must recognise that targeted and considered influencer marketing campaigns will outperform those that overfocus on superficial metrics like follower counts and reach.

The particular influencers that brands choose matter. Brands need to conduct deep research into the influencer's content, their audiences on different social media platforms, and other relevant data. New tactics like working with influencers in different niches yet similar content styles are also emerging. For example, a beauty brand may work with an Instagram artist to gain visibility with a new audience.

Brands are increasing their investments in content marketing, dedicating significant portions of their budgets to influencer-driven content creation. However, marketers must be vigilant, as influencer fraud remains a challenge, with fake followers and bots undermining the effectiveness of campaigns. Successful influencer campaigns today rely on forming genuine brand-creator partnerships that go beyond one-off collaborations.

Instagram continues to dominate, with Instagram Reels driving engagement and the majority of Instagram users interacting with influencer content. Despite Instagram's domination, YouTube, Facebook, and TikTok remain key players. Many brands hoping to connect with Gen Z through IM still opt for TikTok due to its young demographics. Brands seeking broader reach often adopt multi-platform strategies, incorporating Instagram, Facebook, TikTok, and YouTube into their campaigns simultaneously to maximise engagement.

While IM still influences purchase decisions, the content must be strategic and authentic. Half of marketers now prefer working with smaller creators who foster genuine connections with their followers, rather than relying on traditional celebrity influencers.

The growth in the creator economy means influencers have greater capabilities and tools at their disposal, enabling them to produce more professional content. In 2026, influencer marketing remains an effective way for brands to engage their audience.

Brands can contact agencies to handle their campaigns or use an influencer platform to support in-house strategies.

Agencies offer more support, but they come at a higher cost. Platforms are a more cost-effective alternative that maintains creative control. 

In addition, for brands that work successfully with an agency for influencer marketing, investing in the Kolsquare influencer platform offers the flexibility of a two-pronged strategy that could see ongoing campaigns run in-house, while leaving large, one-off campaigns that combine traditional marketing elements to the agency.