Case Study: Haverhill Jewelry cuts spam 90% and unlocks $52k in 30 days with Customers.ai

Haverhill Jewelry cuts spam 90% and adds $52k in 30 days with Customers.ai

Haverhill Jewelry, a direct-to-consumer jewelry brand, was experiencing a significant decline in its email performance by early 2025. The challenge was an influx of inaccurate data from a legacy website visitor ID tool, which led to a surge in spam complaints and a damaged domain reputation, causing their email platform, Klaviyo, to throttle their sends. This toxic data was quietly poisoning their marketing flows and softening revenue.

The solution was a data detox implemented by Customers.ai. The vendor replaced the legacy tool with its own service for accurate identity resolution, rebuilt segments with verified contacts, and suppressed inactive profiles. The results were dramatic: a 90% drop in spam complaints and $52,500 in incremental flow revenue within 30 days. Customers.ai also delivered 4.3x more revenue per identified user compared to the previous tool.

Haverhill Jewelry