To choose an influencer marketing agency, test them on 5 things before signing: how they vet creators, how they verify audiences are real, who owns the content, how they measure results beyond reach, and what their fee actually pays for. The 12 questions below expose each one on a single sales call.

Here's the scene this article is built for. You're a founder on a Zoom with an agency's head of partnerships. The deck was slick, the case studies had big numbers, and now there are 15 minutes left for your questions. What you ask in those 15 minutes determines whether you buy a growth engine or an expensive middleman.

The industry has a wide quality range. Some firms operate mostly as intermediaries between you and the same creator databases you could subscribe to yourself, while the real ones carry opinions, process, and skin in the game. The question worth settling on that call is which kind you're talking to, and these 12 settle it.

The 12 questions to ask an influencer marketing agency

1. How do you vet creators before they reach my shortlist?

A good answer describes a multi-step filter: performance history, content quality review, past brand deals checked, and a human watching the creator's actual content before you ever see the name. A bad answer leans on database search ("we have access to 10 million creators"), because access is a commodity and judgment is the product you're paying for.

2. How do you verify a creator's audience is real and in my market?

A good answer names specifics: engagement authenticity tools, follower geography and demographic breakdowns, comment quality review, and a stated policy for rejecting creators with suspicious growth spikes. A bad answer is "we check engagement rates," with nothing behind it. Engagement rate alone gets gamed by pods and bots, so if the vetting stops there, ask what would catch a padded audience before your budget reaches it.

3. What's your brand safety screening process?

A good answer covers a lookback on the creator's content history, keyword and controversy screening, and a contractual morals clause with a defined removal path. A bad answer treats this as an edge case ("we've never had an issue"). Issues are normal at volume in this industry, so a useful follow-up is: tell me about one and what changed after.

4. Who owns the content, and what usage rights come standard?

A good answer states plainly what's included: organic usage terms, the paid amplification window, whitelisting terms, and what renewal costs when the license runs out. A bad answer gets vague until after signing, which is how brands end up with a top-performing ad they must stop running in 90 days or re-license at triple the price.

5. How do you measure success beyond reach and impressions?

A good answer connects creator work to business outcomes: tracked links, promo codes, post-purchase surveys, branded search lift, and cohort revenue. When we ran creator campaigns for Vitruvian, a single TikTok pulled 8.8M views and the account built 164K+ followers; in the same stretch, Vitruvian raised a $15M Series A. A bad answer is a reach report with a big cumulative-impressions number and no line to revenue.

6. What does your pricing model actually pay for?

A good answer breaks the fee apart: strategy, creator fees, production, paid amplification, and management, each visible. Ask directly what markup applies to creator rates; the pros answer without flinching. A bad answer wraps everything into one retainer and gets defensive about the split. When that happens, keep asking until you can see where the margin sits; you're entitled to know what the fee pays for.

7. Have you run campaigns in my category?

A good answer includes named work, and just as importantly, category scar tissue: in health and wellness, that means fluency in FTC disclosure rules and platform restrictions on health claims. A bad answer is "our process works in any vertical." Process transfers; claim-compliance knowledge and creator relationships don't, and you'd be funding their education.

8. Who negotiates creator contracts, and what's in them?

A good answer: the agency negotiates on your paper or theirs, and the contract covers deliverables, revision rounds, exclusivity, disclosure compliance, and a kill fee. A bad answer treats contracts as the creator's problem or handles deals over DMs. Handshake deals work great until a creator ghosts mid-campaign with your product and your deposit.

9. What happens when a post underperforms or a creator goes off-script?

A good answer has a playbook: make-good posts, reallocation of remaining budget toward what's working, and a named person who calls you within 24 hours. A bad answer is optimism ("that rarely happens"). Some percentage of creator content always underperforms; the difference between agencies is whether that's absorbed by process or by your budget.

10. How much of the work is done by the people on this call?

A good answer tells you exactly who runs your account day to day and lets you meet them before signing. A bad answer stays vague about day-to-day staffing while the senior team fronts the call. Ask directly who runs the account after signing, and meet them before you commit; it's a fair question, and how an agency handles it tells you plenty.

11. Can I talk to a client who's been with you 12+ months?

A good answer is a name and an intro within the week. Retention is the one metric an agency can't stage-manage: campaigns can be cherry-picked, but a client who re-signed twice is real evidence. A bad answer offers a written testimonial instead, or references only clients from 3 years ago.

12. What would make you turn down this engagement?

A good answer names real disqualifiers: budget below viable scale, a product they can't stand behind, timelines that force sloppy creator selection. Agencies with a genuine point of view turn down work that doesn't fit it. A bad answer is some version of "we can make anything work," which tells you the pipeline matters more than your outcome.

How should you score the answers?

Weight the questions by what they protect: measurement (question 5) and pricing transparency (question 6) protect your budget, while vetting and brand safety (questions 1 to 3) protect your brand. A miss on any of those 5 should end the conversation. The rest are tiebreakers between agencies that cleared the bar.

A practical scoring method for the call itself:

1. Take notes verbatim on questions 5 and 6
2. Mark any answer that dodged toward "trust us"
3. Ask the same 12 of every agency you're comparing
4. Compare answers side by side, in writing, within 48 hours
5. Check the reference before signing, always

If you're comparing candidates now, our ranked list of the top health and wellness influencer marketing agencies applies these exact criteria, including to us, and you can pressure-test any agency's answers against our services breakdown to see what full transparency looks like.

One question to ask yourself first

Before choosing an agency, confirm you need influencer marketing at all rather than just content. Influencer marketing buys distribution and borrowed trust; if your real bottleneck is footage for paid ads, UGC creators solve it at a fraction of the cost. Our breakdown of UGC vs influencer marketing walks through which problem you actually have.

Founders who skip this step routinely buy a $30K distribution campaign to solve a $3K content problem. Pressure-test the scope yourself before any sales call, because you're the one who knows which bottleneck you actually have.

If you want to see how we'd answer all 12, book a strategy call. Bring the list, ask them in order, and judge us by the same standard. We built our creator program on 200+ partnerships, and the answers hold up.

Frequently asked questions

What should I look for when hiring an influencer marketing agency?

Prioritize proof over polish: named case studies in your category, transparent pricing that separates fees from creator costs, real audience verification, defined usage rights, and measurement tied to revenue. A long-tenured client reference outweighs any deck slide they show you.

What are red flags in an influencer marketing agency?

The big ones: guaranteed follower or sales numbers, refusal to break down fees versus creator costs, reach-only reporting, no contracts with creators, and a senior team that disappears after signing. Any one of these is survivable; 2 or more means walk.

How much does an influencer marketing agency cost?

Managed programs tend to start around $5,000 to $10,000 monthly for mid-market brands, with creator fees on top (ranges we see across proposals and published rate cards, 1DS estimate). The number that matters more is the fee-to-creator-spend split, so make the agency show it.

How long should an influencer marketing contract run?

Start with a 90-day pilot with defined success metrics, then move to 6 or 12 months if it clears them. Creator programs need a quarter to show honest signal, but a first contract longer than 6 months shifts all the risk onto you.

Should I hire an agency or run influencer marketing in-house?

In-house works when you have a full-time person for outreach, contracts, and measurement, plus patience to build creator relationships from zero. An agency makes sense when speed matters or when their existing creator relationships and category knowledge would take you years to replicate.

Written by Sam Parham, Co-Founder at 1DS Collective. Sam translates platform trends into content engines for founders and e-commerce brands. Reviewed by John Hyland, Founder.

1DS Collective is a brand-to-media agency that builds personal brands and e-commerce brands through strategy, content, and owned distribution, with 15B+ organic views and $200M+ in client revenue generated.