The single highest-trust artifact in agency new business — and the one most firms underbuild.
"Show me the numbers."
Three words. The most common reaction agency teams hear when the case study slide arrives — and the moment most credentials presentations falter.
A specific, named, numbered case study does the work a credentials deck pretends to. It's the single highest-trust element in any pitch. Most firms underinvest in building them — then wonder why pitches built on three shallow stories don't close.
Here's what makes one believable. And how to build them.
The 7-Element Template
A credible case study has seven elements. Miss one and the proof weakens. The strongest case studies are deep on all seven.
| Element | What it includes | Why buyers need it |
|---|---|---|
| 1. The client | Named brand. Permission secured in writing. | Anonymous case studies are discounted by default. |
| 2. The starting point | Where the brand was when the firm engaged. Visibility, position, perception. | Buyers need a baseline to evaluate the result. |
| 3. The challenge | Specific. Not "increase awareness." The actual problem, in the client's words. | Generic challenges produce generic proof. Specificity creates credibility. |
| 4. The strategy | What the firm did — and what they chose not to do. The decisions. | Buyers want to see judgment, not just activity. |
| 5. The numbers | Named outlets. Coverage volume. Share-of-voice movement. Sales lift where attributable. | Buyers anchor on numbers. Vague claims get discounted. |
| 6. The timeline | Month-by-month if possible. What happened in week one vs. month six. | Buyers want to know if results are realistic in their window. |
| 7. The client quote | One sentence from someone named at the client — ideally the most senior contact. | A named, attributable quote is the highest-trust signal a case study has. |
Most firms have case studies strong on three of these and silent on the rest. The silence is what buyers register. Build them complete — or don't include them.
The Named Client Problem
If the client isn't named, the case study carries half the weight. Buyers know that. They discount anonymous case studies by default — assuming, often correctly, that the results aren't quite as defensible as the firm is claiming.
How to get permission:
- Ask at the right moment. After a strong result, before a renewal, when the client is happy.
- Make it easy. Draft the case study yourself. Send a polished version to review.
- Offer reciprocity. Public credit, a trade press feature, a co-authored panel.
- Build it into the contract. New engagements should include a case study clause — usable after a defined window, with client review.
When You Can't Name the Client
Some clients won't permit attribution — public companies in quiet periods, crisis assignments, regulated industries. The case study can still work, with discipline:
- Be specific about everything else. "A Fortune 100 financial services firm" is more credible than "a major client."
- Name the situation in detail. If the client can't be named, the situation specifics should be sharper, not vaguer.
- Bring numbers. Anonymous case studies with strong, specific numbers beat named ones with vague claims.
- Offer to walk through privately. "We can discuss the named case in a follow-up under NDA." Buyers respect that.
What the Buyer Is Asking Themselves
The case study slide isn't a place where the buyer is reading — it's where they're testing. The questions running in their head while the slide is up:
- Could I have hired this firm and gotten this result? Or did this only work because of unrepeatable circumstances?
- Will the firm replicate this for me? Or was the named team different from the team I'd be assigned?
- Are these numbers real? Vague claims trigger the suspicion that defensible numbers don't exist.
- Did the client ask the firm to leave anything out? Awkward silences in the story are noticed.
- What happened next? Is the firm still working with this client? If not — why not?
Case studies that anticipate these questions — naming the team that worked on it, citing numbers with methodology, providing context about the timeline and aftermath — close business that polished case studies don't.
The Numbers That Matter
Numbers without context are just numbers. Strong case studies tie numbers to the business outcome the buyer cares about.
What to include:
- Named outlets. "Featured in The Wall Street Journal, Forbes, and Bloomberg" beats "47 placements across tier-one media."
- Share of voice movement. Vs. named competitors. Before and after. Methodology disclosed.
- Sentiment movement. Tied to a measurement framework, not asserted.
- Business outcomes. Sales lift, pipeline impact, recruiting impact — where attributable. Don't overclaim.
- Timeline anchors. "Within 90 days" or "over 12 months" frames realistic expectations.
What to leave out:
- Vague reach figures — "reached 2.4 billion impressions" means nothing.
- Awards won by the campaign — buyers care about the client's outcome, not the firm's recognition.
- Unattributed sales lift — claiming PR drove a 40% revenue increase when six other variables were in play kills credibility.
The Client Quote — Most Underused Signal
A named, attributable client quote is the single highest-trust element a case study can contain. Most firms either skip it or use a generic "great to work with" line.
How to get a strong one:
- Draft it for them. Send a proposed quote. They'll edit. They almost never write from scratch.
- Make it specific. Not "they did a great job." Something like "they identified the analyst conversation we were missing, and rebuilt the visibility strategy around it."
- Name the title clearly. CMO, Head of Communications, CEO. Title matters more than length.
- Get it in writing. The reference becomes a durable asset.
Building a Case Study Library
Most firms have one or two strong case studies and a long tail of weak ones. The strongest firms have 8–12 deep, named, complete studies — tagged by use case (crisis, launch, repositioning, executive visibility, IPO), refreshed annually, available in multiple formats. The library compounds. Every engagement adds to it.
Buyers don't believe claims. They believe specifics. The case study is the most direct path to belief — and the firms that invest in building them well close more business than the firms that don't.
The case study lives inside the credentials deck, gets tested inside the RFP response, and gets discussed inside the chemistry meeting. See the full new business cluster.
