Slumber
+249% YoY email growth after a full BACK overhaul
The goal
Slumber needed modern email design, stronger retention, and a fix for growing deliverability issues that were quietly taxing performance.
Modern design, fixed deliverability, and retention systems that turned email into a predictable, scalable profit engine.
BACK in action
Redesigned email experience for clarity and performance while restoring inbox trust.
7-step testing system lifted site opt-ins from 12–17% to 16–26%.
Behavior-based flows and segmented offers increased first-time customer revenue by 41.7%.
Automations around key LTV windows grew retention rate 32% YoY and accelerated repeat purchase.
Email before & after
“Transparent Digital Agency has helped unlock efficiencies and growth through their expertise in email marketing.”