Last 3 Months: With vs Without MailTail
Aggregate performance across all campaigns over a 3-month period
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 55% | 71% | +29% |
| Click Rate | 0.7% | 0.8% | +11% |
WINNERMAILTAIL
All case studies
100 Thieves drops, pulled into Primary.
The gaming lifestyle brand increased campaign revenue by 85% and more than doubled click rates with MailTail.
- GamingLifestyle & Apparel
- Esports& Content Creation
- StreetwearLimited Drops
Gaming & streetwear
Campaign Revenue Lift (Dropout Collection)
Click Rate Lift (Dropout Collection)+118%
Open Rate Lift (3-Month Avg)+29%
Klaviyo campaign data, last 3 months baseline comparison + individual campaign tests
Limited drops lost in the Promotions tab
100 Thieves runs limited-edition apparel drops that sell out fast. But their emails were landing in Gmail's Promotions tab, meaning fans missed drop announcements and lookbook campaigns that drive immediate purchases.
- 55%Baseline open rate
- 0.7%Baseline click rate
- LowCampaign revenue per email
Primary inbox placement for every drop
MailTail generates unique code for each merchant that Gmail can't pattern-match as promotional. 100 Thieves integrated in minutes and immediately saw their emails landing in Primary.
- Every merchant gets unique code variations
- No detectable patterns across domains
- Works alongside existing email fundamentals
- Set up with you within 12 hours
The time slips.
Consistent improvements across every campaign type. Real Klaviyo data.
3-Month Baseline Comparison
Aggregate data
Dropout Collection Lookbook
Campaign revenue test
Dropout Collection A/B Test
Head-to-head campaign revenue comparison on a key product launch
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 62% | 77% | +24% |
| Click Rate | 2.4% | 5.3% | +118% |
| Campaign Revenue | — | — | +85% |
WINNERMAILTAIL
Individual Campaign Tests
Campaign-level
In-Person Activation Campaign
Event-driven campaign comparing with and without MailTail
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 60% | 69% | +15% |
| Click Rate | 0.6% | 1.4% | +112% |
WINNERMAILTAIL
Lookbook Campaign
Product lookbook email comparing with and without MailTail
| Metric | Control | MailTail | Lift |
|---|---|---|---|
| Open Rate | 58% | 72% | +25% |
| Click Rate | 0.7% | 0.8% | +24% |
WINNERMAILTAIL
How it was measured.
All data from Klaviyo campaign analytics. Baseline comparison covers the last 3 months of campaign data. Individual campaign tests compare similar sends with and without MailTail. Results may vary based on industry, list quality, and email practices.
The bottom line.
Consistent improvements across every campaign type tested
- Open Rate Lift Range+15-29%
- Peak Click Rate Lift+118%
- Campaign Revenue Lift+85%
The Dropout Collection test showed the clearest impact: MailTail nearly doubled click rate and drove 85% more campaign revenue per delivered email.
Race your own list next.
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