Influencer Marketing AgencyInfluencer marketing with creatorsyour buyers already trust.

Sentinel is an influencer marketing agency for brands that want creators chosen for audience fit, clear disclosure on every paid post and honest reporting on what each partnership delivered. We plan creator work alongside press coverage and paid media as one campaign.

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WHAT YOU GET
A researched creator shortlist, briefs, disclosure checks and a live log of every post.
HOW IT'S PRICED
Retainers from $3,500 a month. Creator fees are agreed per partnership and logged as paid.
WE DON'T PROMISE
Reach, sales or viral posts. Audiences decide what they respond to.
The idea

A creator is worth paying when their audience would listen to them about you.

Follower counts are easy to compare and easy to inflate. What matters more is who follows a creator, how those people respond to recommendations, and whether your product fits the things the creator already talks about. A smaller cooking channel with home cooks in the comments can do more for a kitchen brand than a lifestyle account ten times its size.

Paid is fine. Hidden is not. The FTC’s Endorsement Guides, updated in June 2023, say a material connection between a brand and an endorser has to be disclosed clearly and conspicuously, and the FTC expects advertisers to monitor what their endorsers post. We build that into every brief, check every post before it counts, and label every creator partnership as paid in your coverage log.

Creator work also sits better next to earned coverage. A product review in a trade title, a podcast interview and a set of creator videos tell the same story from three angles, and buyers who meet you in more than one place tend to remember you.

What we run

Influencer marketing agency services, from shortlist to report

Every creator is judged on audience, relevance, credibility, positioning and the business goal behind the partnership.

Creator research

Shortlists built from audience location, age range, interests and comment quality, with the reasons each creator made the list.

Briefs creators can use

Clear briefs with the product facts, the claims you can and can’t make, deadlines and the disclosure wording you expect.

Disclosure and brand safety

Checks on past content before outreach, and a review of every post for clear paid labels before it goes in the report.

Outreach and negotiation

Personal pitches to creators and their managers, with fees, deliverables and usage terms agreed in writing before anything is made.

Podcasts and newsletters

Host-read sponsorships and guest spots on shows and newsletters whose readers and listeners match your buyers.

Measurement

Tracked links, discount codes, views, saves and comments gathered in one log, with every item labelled earned, placed or paid.

$32.55bn

More money is going to creators every year

Influencer Marketing Hub’s 2025 benchmark report estimates the influencer marketing industry at $32.55 billion in 2025, up from $24 billion in 2024. More spend means more competition for good creators and more sponsored posts in every feed, so we pick partners on audience fit before reach.

Source: Influencer Marketing Hub: Influencer Marketing Benchmark Report 2025
How a campaign runs

From audience to report in five steps

A first round of creator partnerships usually takes four to eight weeks from brief to the last post going live.

  1. AudienceWe agree who you need to reach, what you want them to do and which claims about your product are safe to make.
  2. ShortlistWe research creators across the platforms your buyers use and send you a shortlist with audience notes, past brand work and rough fee ranges.
  3. BriefYou approve the creators and the brief. We agree fees, deliverables, usage terms and disclosure wording with each one in writing.
  4. PublishCreators make the content in their own voice. We check each post for accuracy and clear paid labels, and flag anything that needs fixing.
  5. ReportEvery post goes into your live coverage log, labelled as paid, and we review results with you each month to decide who to work with again.
FAQ

Influencer Marketing Agency: common questions

What does an influencer marketing agency do?

An influencer marketing agency is a team that finds creators whose audiences match your buyers, agrees paid partnerships with them, briefs and checks the content, and reports on results. At Sentinel that work sits inside a wider media plan, so creator posts support your press coverage and paid media.

How do you choose creators?

Audience fit comes first: where followers live, what they care about and how they respond to recommendations. Then we look at content quality, past brand partnerships and brand safety. Follower count is the last thing we check.

How do you handle FTC disclosure?

Every brief includes the disclosure wording we expect, and we check each post for a clear paid label before it counts. FTC rules on endorsements apply to brands as well as creators, and regulated sectors such as health, finance and crypto have extra rules, so your own legal team should approve claims. Nothing here is legal advice.

Can you guarantee sales or reach?

No. We never guarantee reach, sales or results from any creator. We improve the odds by choosing creators carefully and briefing them well, and we report honestly on what each partnership delivered.

How much does it cost?

Our Digital PR retainers start at $3,500 a month for the Signal package and can include creator outreach. Creator fees vary by creator and format, are agreed with you before anything is booked, and are logged as paid. See our pricing page for packages.

Related services

Often paired with this service

Digital PR

Story-led campaigns that earn coverage in the publications your buyers read.

Explore digital pr

Planning a creator campaign?

Tell us who you want to reach and what you’re launching. We’ll tell you which kinds of creators fit and what a first round could look like.

Talk to Our Media Team
Talk to Our Media Team