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How Sima Lifted Engagement by a Third — Self-Served, From the First Week

+33.6%

Click-through rate

(up to +206% in best campaign)

+10.5%

Open rate

(up to +22% in best campaign)

Background

Underoutfit is one of the fastest-growing direct-to-consumer apparel brands in the U.S., focused on comfortable, confidence-building essentials for women. With a highly engaged customer base and a sophisticated lifecycle marketing program, email is one of the company's most important revenue channels.

Like many leading ecommerce brands, Underoutfit had already invested heavily in segmentation and testing. Yet the team faced a familiar gap: while everyone talks about AI-powered efficiency, very few solutions deliver measurable revenue growth.

Approach

Sima onboarded itself. Eikona connected to the existing stack in minutes — no migration, no new workflow to learn — and from the first week every send became a dynamic campaign, exploring many messages and angles at once, steered by reinforcement learning and measured against a randomized control. Running in minutes, not meetings: self-served end to end, with no onboarding project and no new headcount — the existing calendar simply kept shipping, while Eikona's Adaptive Marketing Engine handles the testing, shifting traffic toward winners in real time as the team reads the results. Insights on tap: creative analytics rank every variation by performance, so the team sees at a glance which messages and angles win, and Ike, Eikona's analytics bot, answers plain-language questions about what worked and why — the kind of insight that used to require an analyst. Deliverability, earned: replacing one-size-fits-all blasts with AI-led, relevant communication lifted deliverability substantially — providers reward messages people actually engage with — and better deliverability compounds every other gain, more opens, more clicks, and a stronger sender reputation with each campaign.

01

Adaptive Campaigns, Not Blasts

Business Challenge

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Lift engagement measurably — opens and clicks proven against a randomized control.

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Get always-on testing and clear insights without adding headcount or tools.

Blue circle with a check mark inside signifying confirmation or success.

Increase deliverability, so every win actually gets seen.

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Within weeks, Eikona helped us scale subject-line testing and quickly understand what works through Ike, its analytics assistant. I believe this is the future of email and retention marketing. The team is highly responsive and continually improves the product — I can't wait to see what they build next.

Katia Koginsky

Brand Marketing Director, Sima

Key Takeaways

Adaptive, AI-native testing isn't reserved for enterprise teams — a lean brand plugged Eikona in and turned every send into a measured, repeatable engagement win.

01

Enterprise Results, Self-Served

(up to +206% in best campaign)

02

Measured, Not Guessed

Every engagement gain was proven against a randomized control and reported with 95% confidence intervals.

03

Deliverability, Earned

AI-led, relevant communication is what providers reward: deliverability rose substantially as a by-product of better sends.

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