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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.

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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.

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.

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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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