Zenni Optical | Criteo Success Story

Zenni scales efficiently with +38% ROAS using Criteo’s full-funnel display solution

+38% ROAS above target in H1 2025

Validated incremental acquisition through geo holdout test

Challenge

Navigating growth while protecting performance

Founded in 2003, Zenni Optical pioneered online eyewear with stylish, affordable glasses delivered directly to consumers. Its mission to make eyewear accessible helped it grow into a trusted brand for millions worldwide.

As online shopping surged during the pandemic, Zenni scaled rapidly and launched an in-house digital marketing team. To keep momentum strong, they needed a partner who could help them achieve three key goals:

Expand efficiently across digital channels
Serve highly personalized ads to diverse audiences
Hit performance targets, especially on ROAS

Zenni sought a display partner with access to premium inventory, strong AI capabilities, and the flexibility to adapt to their evolving strategy.

Solution

Building a personalized, agile full-funnel strategy

Zenni partnered with Criteo to build a full-funnel display approach designed to convert casual browsers into loyal customers.

Leveraging Zenni’s first-party data and Criteo’s commerce insights, the team launched dynamic ad campaigns tailored to shopper intent. Smart filtering and product prioritization ensured that spend focused only on what mattered most to each audience segment.

Criteo provided the flexibility to quickly pivot strategies without compromising on efficiency. From seasonal campaigns to geo-focused activations, Zenni relied on Criteo to move fast and stay profitable.

Results

Driving efficient growth with measurable impact

In the first half of 2025, Zenni’s partnership with Criteo delivered +38% ROAS above target, validating the effectiveness of their personalized display strategy. A geo-based holdout test confirmed that new customer acquisition was incremental, helping Zenni scale without sacrificing efficiency.

The team also valued Criteo’s agility: from activating new channels to supporting seasonal surges, Criteo’s technology and service teams helped Zenni stay ahead of shopper demand.