The premium diaper bag brand drove up to +233% revenue lift per campaign and more than doubled click rates with Mailtail.
Klaviyo A/B test data, March 2026 — head-to-head sends with vs. without Mailtail
Restocks and Launches Stuck in Promotions
Mina Baie's most loyal customers were missing key restock alerts and Founder's Series launches because emails landed in Gmail's Promotions tab. With premium price points and limited inventory, every send that didn't reach Primary was lost revenue.
Primary Inbox Placement on Every Send
Mina Baie ran a series of 100% test-size A/B tests, sending the same email creative with and without Mailtail. The Mailtail variant won every test — statistically significant at 100% win probability — across opens, clicks, and revenue.
Campaign Results
Four head-to-head A/B tests across March 2026. Mailtail won every metric on every test.
Harlow Mini Vegan Restock
Flagship test · 169K sendsRestock alert to non-waitlisters. ~85K sends per variant, statistically significant.
Founder's Series — Jenna's Bag
Product launch · 173K sendsFounder-led product story. ~86K sends per variant, statistically significant.
Changing Kit Vegan Coco
Restock · 171K sendsRestock alert for the 4-Piece Changing Kit. ~85K sends per variant.
Judie Canvas
Product launchStatistically significant lift across opens and clicks. Revenue lift volatile due to small conversion sample.
The Bottom Line
Across four A/B tests in March 2026, Mailtail won every test on every metric.
On the Harlow Mini restock alone, Mailtail more than doubled click rate and tripled revenue compared to the same email without Mailtail — with 100% statistical significance reported by Klaviyo.
All data from Klaviyo A/B testing reports, March 2026. Each test compared the same email creative with and without Mailtail at 100% test size, with statistical significance reported by Klaviyo at 100% win probability. Revenue figures reflect Klaviyo's placed-order attribution. Results may vary based on industry, list quality, and email practices.