How to Choose an Influencer Marketing Agency: 10 Questions to Ask

Every influencer marketing agency pitch sounds roughly the same. Same logos in the case studies, same buzzwords about "authentic partnerships," same dashboards screenshotted at flattering angles. After the third deck, they start to blur — and brands end up picking the agency with the best chemistry instead of the one most likely to actually move the business.

Here are ten questions that cut through the polish. None of them require technical fluency to ask. All of them surface real differences between agencies that look identical on paper.

1. "Walk me through the last campaign you ran in our category that didn't work. What happened, and what did you change?"

The single most useful question in any agency selection. Every good agency has lost campaigns. The bad ones either pretend they haven't, or describe a "loss" so trivial it's clearly invented for the moment.

What you want to hear: a real story with real specifics — what the brief was, what they cast, what underperformed, and the concrete change they made in the next campaign. What you don't want to hear: "We've never really had a campaign that didn't work."

2. "How do you build your creator roster, and how often do you remove creators from it?"

Most agencies will say they have a "vetted roster of 10,000+ creators." The follow-up matters more than the number.

Ask how creators get added (referral, application, scrape from third-party tools), how they get vetted (manual review, performance history, audience-authenticity check), and — critically — how they get removed. Rosters that only grow are databases. Rosters that get pruned for underperformance are operating assets.

3. "What does your reporting look like — can I see a real recent report with the brand name redacted?"

A real deliverable tells you more than any pitch slide. Look for:

Per-creator performance, not just totals. Clear definitions of how each metric is measured (especially "views" and "engagement"). Honest commentary about what underperformed, not just a victory lap. A read on what to do differently next time.

Agencies that hesitate to share a real example, or that send back a single-page summary heavy on impressions and light on dollars, are telling you what their reporting culture is.

4. "How do you measure conversion when the campaign isn't using affiliate codes?"

Anyone can attribute revenue with a discount code. The agencies worth hiring have a credible answer for the harder case: upper-funnel work, premium brands without codes, B2B, multi-touch journeys.

Acceptable answers include: incremental lift studies, post-purchase surveys, geo-holdout testing, branded search lift, sessions-to-conversion modeling. Unacceptable answer: "We mostly look at engagement." Engagement is not conversion. An agency that conflates them will spend your budget that way.

5. "How do you decide when to recommend whitelisting, and how do you price it into the deal?"

If the agency can't explain whitelisting cleanly, in plain English, with a default framework for when to use it and how to negotiate fees, they're missing the most important paid-leverage tool in the category. (For context on what good looks like here, see [our whitelisting deep-dive](/blog/what-is-influencer-whitelisting).)

The right answer covers: when whitelisting is worth it (and when it isn't), how they recommend setting fees, whether usage rights are negotiated upfront or retrofitted, and how they coordinate between organic posting and paid amplification. If they describe whitelisting as "an add-on we sometimes do," they don't run it as a core capability.

6. "Who actually does the work on our account, day to day?"

You're not buying the founder who pitched you. You're buying the team that will execute. Ask explicitly: who is the account lead, who manages creators, who reviews content, who pulls reporting? What's their experience? How many other accounts do they handle in parallel?

A senior pitch with a junior delivery team is the most common agency pattern, and the most common source of "the agency we hired isn't who we thought we were getting" complaints a year in. Surface the real org chart now.

7. "What's your contracting model with creators — and can I see a sample creator contract?"

Boring-sounding question, big practical implications. You want to know:

Are creators on direct contracts with the agency, or with your brand? Who owns the content rights, for how long, and across what channels? What happens if a creator's behavior off-platform creates a brand-safety issue? Who handles disputes, late deliverables, and revisions?

Agencies that operate on handshake deals and shared Google Docs are agencies whose problems will eventually become yours.

8. "How do you handle disclosure and compliance, especially for FTC, ASA, and platform rules?"

Compliance is unglamorous and non-negotiable. Ask how creators are briefed on disclosure language, whether the agency reviews posts for proper #ad / "Paid partnership" tagging before they go live, and how they handle platform-specific rules (TikTok's Branded Content Toggle, Meta's Branded Content tools, YouTube's paid promotion disclosure).

An agency that shrugs at this is an agency that's going to put your brand in front of a regulator at some point. The fines are small; the press is large.

9. "What's your minimum engagement, and what does your fee structure actually look like?"

Get specific. Is there a monthly retainer? A management fee as a percentage of media or creator spend? Per-campaign project fees? A blended model?

The numbers matter less than how transparently they're presented. Agencies that won't put pricing in writing until contracts are signed are agencies whose pricing is designed to expand over time. Agencies that can hand you a clean fee table on the second call have the operational discipline you want.

A reasonable benchmark for full-service influencer marketing: 15–25% of creator and media spend as the management fee, plus a strategic retainer for ongoing work, with clear add-ons for paid amplification and production. Anything dramatically lower usually means hidden margin somewhere; anything dramatically higher should come with proof of why.

10. "What's one thing you'd push back on if we hired you tomorrow?"

The best agencies have a point of view. They've seen enough brands make the same mistakes that they'll tell you when you're about to make one — even when the brief asks them not to.

What you want to hear: a thoughtful, specific challenge to something you've already said in the process — your category assumptions, your creator wishlist, your KPIs, your timing. What you don't want to hear: "Nothing, we love your strategy."

An agency that won't push back during the sales process won't push back during the engagement either. You'll get exactly what you ask for, which is rarely the same as what you need.

A few patterns to watch for

Across all ten questions, three patterns separate the agencies worth hiring from the rest:

Specificity over fluency. The good ones answer with real numbers, real campaigns, real names. The rest answer with frameworks and adjectives.

Honesty about limits. The good ones tell you what they're not for ("we don't do affiliate-heavy DTC well — go to X for that"). The rest claim to be excellent at everything.

A real operating model behind the pitch. The good ones can show you the system: how rosters are built, how briefs are written, how reports are generated, who does what. The rest sell talent and improvise execution.

The takeaway

The best influencer marketing agency for your brand isn't the one with the slickest deck or the most famous logos. It's the one that answers these ten questions with specifics, admits what they're not good at, and pushes back on the parts of your brief that won't survive contact with the market.

Run the process. Ask the questions. The right answer becomes obvious — usually around question four.