How to Check a Marketing Agency's References: The Call Playbook

The Reference Call: Your Last Line of Defense

You have shortlisted three agencies. Their case studies look polished. Their proposals promise results. Their reviews seem stellar. But here is the problem: over 60% of agencies hold a perfect 5.0 rating, which makes star scores nearly useless for differentiation. Knowing how to check a marketing agency's references the call playbook way gives you an edge that surface-level vetting cannot provide.

Reference calls are the closest you will get to a preview of your own experience. Former clients have no incentive to sugarcoat. They have lived through the onboarding chaos, the missed deadlines, and the invoice surprises. Or they have experienced seamless collaboration, proactive strategy, and measurable growth. A structured call uncovers which version you are about to sign up for.

This playbook covers who to call, what to ask, how to interpret answers, and the red flags that should end your consideration immediately.

Why Star Ratings Alone Are Not Enough

Rating inflation is real. When more than half of all agencies display perfect scores, you cannot rely on aggregate numbers to separate excellent partners from mediocre ones. Reviews also tend to skew toward clients who had either exceptional or terrible experiences, missing the crucial middle ground where most engagements actually land.

A reference call fills the gap. You control the questions. You hear tone, hesitation, and enthusiasm in real time. You can probe on specifics that matter to your situation, whether that is handling a product launch, managing seasonal ad spend fluctuations, or integrating with your internal analytics stack.

Before you browse the directory to build your shortlist, commit to calling references for every finalist. Skip this step and you are gambling with your budget and your timeline.

Who to Request as a Reference

Agencies will hand you their happiest clients by default. That is expected. Your job is to steer them toward references that actually mirror your situation.

• Similar budget range: An agency that excels with $500K monthly ad spend may neglect a $15K account. Ask for references at your investment level.
• Comparable industry or complexity: If you sell regulated products, talk to someone who navigated compliance with that agency. If you are in ecommerce, find a reference who scaled paid campaigns during a major sale event.
• Tenure alignment: Request at least one reference who worked with the agency for over 12 months. Long-term clients reveal how partnerships evolve once the honeymoon period ends.
• A churned client: This request often gets declined, but when an agency agrees, it signals confidence. Ask why the engagement ended and whether the parting was professional.

With 47,000+ verified agencies in the Pick an Agency index, you have options. Do not settle for references that cannot speak to your specific needs.

How to Check a Marketing Agency's References: The Call Playbook Framework

Structure your call around four pillars: results, communication, problem resolution, and commercials. Each pillar exposes a different dimension of the working relationship.

Pillar 1: Results

Start with outcomes. You want to understand whether the agency delivered what it promised, and how those results compared to expectations set during the sales process.

1. "What specific KPIs did the agency commit to, and did they hit them?" Listen for concrete numbers. Vague answers like "they did good work" suggest the client never had clear targets, which may reflect the agency's lack of rigor.
2. "How long did it take to see measurable progress?" Agencies often oversell speed. A reference who says results took six months when the pitch promised 90 days tells you something important.
3. "Did the results sustain after the initial wins, or did performance plateau?" Some agencies front-load quick wins to lock in renewals, then coast. Long-term references reveal this pattern.

Pillar 2: Communication

Execution matters less if you cannot get updates, feedback loops are slow, or the team disappears between meetings.

1. "How often did you communicate, and through which channels?" Compare the answer to what the agency told you during the pitch. Discrepancies signal overpromising.
2. "Who was your day-to-day contact, and were they the same people you met in the sales process?" The bait-and-switch, where senior strategists pitch but junior staff execute, is a common complaint. References expose this quickly.
3. "How responsive were they when you needed something urgently?" Ask for a specific example. A reference who recalls a crisis where the agency stepped up tells you more than a generic "they were responsive."

Pillar 3: Problem Resolution

Every engagement hits bumps. What separates great agencies from average ones is how they handle friction.

1. "Can you describe a time something went wrong? How did the agency respond?" If the reference cannot recall a single issue, they may not have been deeply involved. Real partnerships include disagreements.
2. "Did you ever feel like the agency was hiding bad news or delaying difficult conversations?" Agencies that bury underperformance until renewal time are a liability. Transparency under pressure matters.
3. "Would you say the agency took ownership of mistakes, or did they deflect?" Accountability is non-negotiable. References who describe blame-shifting should make you pause.

Pillar 4: Commercials

Money questions feel awkward but save you from invoice shock later.

1. "Did the final costs align with the original proposal, or were there unexpected charges?" Scope creep happens, but ethical agencies flag it early. Surprise bills at month-end indicate poor account management.
2. "Did you feel you received fair value for what you paid?" This subjective question often prompts the most candid answers. Listen for hesitation.
3. "If you were starting over with the same budget, would you hire them again?" A direct yes or no cuts through politeness. Follow up with "why?" regardless of the answer.

Using this playbook for how to check a marketing agency's references the call playbook style ensures you cover every critical dimension without meandering through small talk.

Interpreting Answers: What to Listen For

The substance of answers matters, but so does delivery. Pay attention to these signals during the call.

• Enthusiasm vs. obligation: References who sound like they are reading a script may have been coached. Genuine advocates volunteer specifics without prompting.
• Recency of detail: Can the reference recall names, timelines, and metrics? Fuzzy recollections suggest the engagement was forgettable, which is not a compliment.
• Unprompted caveats: "They were great, but..." is often more valuable than unqualified praise. Lean into those caveats with follow-up questions.
• Willingness to continue the conversation: A reference who offers to take another call or share documents is a strong positive signal. Rushed, defensive references raise concerns.

Red Flags That Should End Your Consideration

Some answers are disqualifying. Walk away if you hear:

• "They stopped responding after we signed." Post-sale neglect is a structural problem, not a one-off.
• "We never really understood what they were doing." Opacity suggests either incompetence or intentional obfuscation.
• "The results were fine, but we felt nickel-and-dimed." Constant upsells erode trust and blow budgets.
• "I would not recommend them to a friend." This direct statement, especially from a reference the agency provided, is a five-alarm warning.

Remember, half of all agencies were founded after 2015, with a massive surge between 2020 and 2024. Many lack the operational maturity to deliver consistent experiences. Reference calls help you separate the seasoned operators from the underprepared newcomers.

Special Considerations by Agency Type

Tailor your questions based on the service you are hiring for.

If you are evaluating PPC management agencies, ask references about ROAS trends over time, how the agency handled platform policy changes, and whether they proactively tested new campaign types.

For SEO engagements, probe on timelines to ranking improvements, how the agency adapted to algorithm updates, and whether they built assets you retained after the contract ended.

For brand or creative work, focus on the feedback loop, revision limits, and whether the agency pushed back on requests that would have weakened the work.

Data from Pick an Agency shows that 85% of agencies offer three or fewer services, which means most are specialists. Match your questions to their claimed expertise.

How Many References Are Enough?

Three is the minimum. Five is ideal. Fewer than three creates sample-size problems. More than five yields diminishing returns unless you are evaluating a large-scale engagement.

Spread your calls across different reference profiles: one long-term, one similar budget, one similar industry. If patterns emerge across all three, you can trust them. If answers diverge wildly, dig deeper or add more calls.

Documenting Your Findings

Do not rely on memory. Use a simple scoring sheet during each call:

Pillar	Key Takeaway	Score (1-5)
Results
Communication
Problem Resolution
Commercials

After all calls, compare scores across finalists. The agency with the highest average score, combined with the fewest red flags, is your frontrunner.

For a deeper look at what to ask during agency pitches themselves, see our guide on questions to ask a marketing agency before signing.

The Final Step Before Signing

Reference calls are powerful but not infallible. Combine them with contract review, a pilot project if possible, and clear exit terms. When you apply how to check a marketing agency's references the call playbook method alongside these safeguards, you dramatically reduce the odds of a costly mismatch.

If you are still building your shortlist or want to compare verified agencies across specialties, use our free matching tool to get recommendations from over 47,000 vetted partners. The search takes two minutes, and the match is tailored to your budget, industry, and goals.

FAQ

How many reference calls should I make before hiring an agency?

Plan for at least three calls, ideally five. This gives you enough data points to identify patterns while remaining manageable within your selection timeline. Prioritize references with budgets and industries similar to yours.

What if an agency refuses to provide references?

Treat refusal as a red flag. Established agencies with satisfied clients have no reason to block reference calls. If an agency claims confidentiality, ask them to seek permission or provide anonymized case studies with contact options.

Should I trust only the references the agency provides?

Agency-provided references are a starting point, not a complete picture. Supplement them by checking third-party review platforms, asking your network for unfiltered opinions, and requesting references from churned or former clients when possible.

How long should a reference call last?

Aim for 15 to 20 minutes. This is long enough to cover results, communication, problem resolution, and commercials without overburdening the reference. Prepare your questions in advance to respect their time.