Companies that use OpenSend

Source: Analysis of tech stacks from 1,312 companies that use OpenSend

I noticed something striking about OpenSend users: they're almost exclusively e-commerce companies running sophisticated direct-to-consumer operations on Shopify. The presence of Klaviyo in 810 companies, combined with Attentive and tools like Triple Whale and Rebuy Engine, tells me these are brands that have moved beyond basic online retail into advanced customer lifecycle management and revenue optimization.

The pairing of Klaviyo and Attentive is particularly revealing because it shows these companies are running coordinated campaigns across email and SMS channels. They're not just sending promotional blasts. They're building segmented, personalized customer journeys. When I see Gorgias appearing 117 times more often, it confirms these brands are handling significant customer service volume, which typically means they've reached meaningful scale. Triple Whale's presence suggests they're data-obsessed, constantly monitoring metrics like customer acquisition cost and lifetime value. And Rebuy Engine, appearing 158 times more likely, shows they're focused on increasing average order value through smart product recommendations and upselling.

The full stack reveals marketing-led growth companies that have reached a certain maturity threshold. They're past the startup phase where founders handle everything manually. These businesses generate enough volume to justify specialized tools for different functions, from customer support to analytics to retention marketing. The Heatmap correlation, though found in fewer companies, suggests many are still actively optimizing their conversion funnels and testing different approaches.

Source: Analysis of Linkedin bios of 1,312 companies that use OpenSend

I noticed that OpenSend's typical customer is a direct-to-consumer brand selling physical products, primarily in retail, apparel, beauty, wellness, and lifestyle categories. These aren't software companies or B2B services. They're making things people wear, consume, or use in their daily lives: skincare products, clothing, jewelry, supplements, home goods, and specialty food items. Many operate exclusively or primarily online, though some have physical retail presences too.

The companies span a range from emerging to established, but most sit in that growth zone between scrappy startup and corporate enterprise. I see employee counts mostly between 10 and 200 people, with many in the 11-50 range. Funding stages vary widely, from bootstrapped to Series B, but very few are at late-stage funding rounds. They're past the garage phase but still building, still defining their market position.