Most case studies don't sell
The typical agency case study is a montage: "We worked with Acme. We did SEO. They saw great results." It's forgettable, and it doesn't help close future deals.
The case study that closes follows a specific narrative structure — Problem → Solution → Outcome — with metrics, specific tactics, and a quotable moment.
The 5-part structure
1. The headline (one sentence)
Specific outcome with a number.
"How we grew Acme's organic traffic 312% in 8 months — and tripled their qualified inbound leads."
Not: "Helping Acme with SEO."
2. The problem (2-3 sentences)
Specific, quantified, with a "why now" moment.
"Acme was losing organic traffic to three direct competitors who had outranked them on commercial-intent keywords. By Q2 2025, organic-driven leads were down 40% YoY, and CMO Jane Smith was facing a board mandate to fix it before the next funding round."
3. The solution (3-5 sentences)
Specific tactics, not service categories.
"We ran a comprehensive content audit, identifying 47 underperforming pages. Then we restructured the site architecture around three pillar topics, produced 24 new long-form articles targeting bottom-funnel keywords, and earned 18 high-authority backlinks via digital PR. We also rebuilt their internal linking strategy and shipped technical SEO fixes (Core Web Vitals, schema, hreflang)."
4. The outcome (3 specific metrics)
Numbers, not adjectives.
- Organic traffic: +312% in 8 months (28K → 115K monthly visitors) - Qualified inbound leads: 3.1× (44 → 137 per month) - Top-3 ranking keywords: 7 → 89 (commercial-intent terms)
5. The quote (1-2 sentences from the client)
Specific, in their voice, unbranded.
"By month 4 we were ranking on 23 new keywords I didn't think we could compete on. By month 8 we replaced our paid search spend with organic. The board stopped asking about lead-gen." — Jane Smith, CMO
What to never include
Avoid:
- Generic claims ("dramatic growth") — replace with numbers
- Stock photos of laptops — looks like every other case study
- "Strategy + Implementation" as the only solution description
- Year-old metrics — keep the case study fresh
How to make case studies do work
Three places to use case studies for compounding effect:
- In proposals — auto-match by industry. AgencyPitch's AI does this — finds the most relevant case study from your library based on the prospect's industry + service.
- On your site — dedicated /case-studies page, plus excerpt callouts on service pages.
- In follow-up emails — when a prospect goes quiet, sending a relevant case study often re-opens the conversation.
Build your case study library
The agencies winning at proposals have 5-15 case studies in rotation, organized by industry + service. The AI auto-matches the right one to each new proposal.