Tim Waring

Tim Waring

Founder of Eves & Gray London

"Most brands brag about 3–4X ROAS on their campaigns. With Zefir, we consistently see 18–20X ROAS on WhatsApp. It’s become one of our highest-return marketing channels."

Eves & Gray London partnered with Zefir to scale revenue through high-performing WhatsApp campaigns integrated directly with their WooCommerce store. By combining structured promotional campaigns, advanced customer segmentation, and clear revenue attribution using UTMs and Zefir’s tracking system, the brand transformed WhatsApp into a predictable, high-ROI sales channel.

The result was consistent 18–20X ROAS on WhatsApp campaigns, significantly outperforming traditional digital marketing benchmarks and providing full visibility into campaign performance and revenue contribution.


About the brand


Eves & Gray London is a UK-based footwear brand known for premium shoes designed for comfort, style, and everyday wear. With a growing customer base and strong brand demand, the team wanted a more direct and profitable way to reach customers beyond email and paid ads.

While traditional channels delivered results, engagement was becoming less predictable and campaign performance was harder to track at a granular level. Eves & Gray London needed a channel that offered:

  • Higher engagement

  • Clear revenue attribution

  • Faster campaign execution

  • Stronger ROI

That’s when they implemented Zefir’s WhatsApp marketing platform.


1. WooCommerce Integration & Attribution Setup


Zefir was integrated directly with Eves & Gray London’s WooCommerce store, enabling seamless access to:

  • Order data

  • Customer behaviour

  • Purchase history

  • Cart activity


Every WhatsApp campaign was tracked using:

  • UTM parameters

  • Zefir’s proprietary attribution tags


This ensured each sale could be accurately linked back to the exact campaign, message, and audience segment.

For the first time, Eves & Gray London team had clear visibility into WhatsApp-driven revenue.


2. Campaign Strategy

Eves & Gray London used WhatsApp for:

  • New collection launches

  • Limited-time promotions

  • Stock announcements

  • Seasonal campaigns

  • VIP customer offers


Each campaign was:

  • Sent to segmented UK customer audiences

  • Fully compliant with UK messaging regulations

  • Timed for maximum engagement

  • Tracked with revenue attribution


Messages were short, direct, and conversion-focused — designed to drive immediate action.


3. Measurable Business Impact


With Zefir, Eves & Gray London achieved:

  • 18X ROAS on WhatsApp campaigns

  • Strong revenue attribution through UTMs + Zefir tags

  • Higher engagement compared to email

  • Faster campaign execution

  • Clear performance reporting

  • Scalable UK customer communication


WhatsApp became a core revenue channel, not just a support or notification tool.


Why Zefir Worked


Zefir provided Eves & Gray London with:

  • WhatsApp Business API access

  • WooCommerce integration

  • Campaign automation tools

  • Audience segmentation

  • Revenue attribution tracking

  • Centralised campaign management

Everything was managed from one platform, allowing the team to focus on strategy instead of manual execution.

A High-ROI Growth Channel for UK eCommerce


With Zefir, Eves & Gray London turned WhatsApp into a high-return marketing channel that consistently outperformed traditional benchmarks.

Instead of relying solely on email and paid ads, the brand now runs:

  • Revenue-driven WhatsApp campaigns

  • Fully tracked promotions

  • UK-focused customer engagement

  • Data-backed optimisation


The result is a scalable, predictable, and highly profitable messaging strategy.

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