300% growth in email revenue — for a premium automotive tech brand that barely used it.

The client

Premium automotive technology with an untapped retention channel

Stinger develops premium automotive electronics — infotainment systems, audio equipment, lighting, and safety cameras — designed to enhance safety, connectivity, and entertainment in vehicles. A brand known for quality and innovation, with customers who buy on trust and repeat when the product delivers.

Those customers represented a substantial retention opportunity. The email channel wasn't capturing it.

The challenge

A list that wasn't performing — and deliverability that was getting worse

Stinger's email programme had problems at every level. Open rates were low. Spam complaints were climbing. Campaign revenue wasn't moving the needle. The flows weren't optimised to drive repeat purchases. And SMS — a natural complement for their audience — was barely being used.

Fixing email for a brand like this requires more than better subject lines. It requires rebuilding the list health, the segmentation, the content strategy, and the technical infrastructure underneath all of it.

The strategy

Deliverability first. Revenue second. Retention third.

Fixing the foundation — deliverability and targeting

We worked through content and targeting refinements to improve deliverability. Getting emails to the inbox is the prerequisite for everything else. With cleaner sending practices and better list hygiene, open rates stopped declining and began climbing — eventually to 139% year-over-year growth.

Optimising flows for revenue contribution

Automated flows — welcome, post-purchase, win-back, browse abandonment — were rebuilt with Stinger's buyer in mind. The goal was to increase the share of total revenue that email owned, not just to drive individual campaign clicks. Email went from a minor supporting channel to a primary revenue driver.

SMS as a retention complement

We launched SMS tooling alongside the email programme, using it for time-sensitive moments — product launches, promotions, restocks. The combination of email and SMS created multiple touchpoints across the customer journey without overwhelming any single channel.

The results

Email became a channel worth owning

The transformation of Stinger's email programme demonstrates what happens when retention is treated as a strategy, not an afterthought. Better deliverability meant more emails landed. Better content meant more of them opened. Better flows meant more of those opens converted.

• 300% growth in the percentage of total revenue attributed to email year-over-year
• 139% increase in campaign open rates year-over-year
• 19% reduction in spam complaints — improved sender reputation throughout
• SMS launched and integrated as a complementary retention channel
• Email moved from a minor channel to a substantial revenue contributor
• Stronger customer engagement with fewer deliverability issues across the board