Hi {{first_name}},
Most [[industry]] teams handle [[problem]] by [[common approach]]. [[Case study company]] tried something different: [[brief description of the approach using your product]]. The result was [[specific outcome with numbers]].
I can send the full write-up, but the short version: the shift that mattered most was [[one key insight]].
If [[prospect company]] is thinking about this problem, I'd like to compare notes. Would a call be useful?
[[Your name]], [[your company]]