Does open rate predict email revenue? We measured 4,191 campaigns.

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Blossom Ecom has managed 150+ ecommerce brands since 2019, with $110M+ in attributed email revenue, 1.6B+ emails sent, 31x average client ROI and a 51% average open rate. The study below uses a counted subset of that work: the 10 brands with full Klaviyo history. It is not Blossom's total.

Blossom's dataset: 4,191 shipped email campaigns across 10 DTC brands, 167,402,920 recipients and $9,700,034 in Klaviyo-attributed campaign revenue, Nov 2019 – Sep 2026.

What did the 4,191 campaigns show?

Within each brand, we ranked campaigns by open rate and by revenue per recipient, then took the median across brands. Nine brands had at least 30 campaigns, which gave 4,185 campaigns in the analysis.

• Open rate: the median within-brand link to revenue per recipient was weak. Across brands it ranged from negative to positive.
• Click rate: the median link was clearly stronger, and it was positive on all 9 brands.
• Why within brand: the largest brand supplies 30% of the campaigns. Pooling would let one account's scale pass for a cross-brand pattern.

Revenue here is Klaviyo-attributed campaign revenue. Attributed revenue is not incremental revenue. Flow revenue is not part of this analysis.

What should you measure instead of open rate?

Grade campaigns on click rate and revenue per recipient, and compare each send against your own recent campaigns.

When an A/B test splits, with one arm winning opens and the other winning clicks, back the click winner. Use open rate as a deliverability check only. Klaviyo's 2026 benchmarks treat inbox placement, bounce, spam complaint and unsubscribe rates as the health checks to run before scaling sends.

What does Blossom cost and guarantee?

Blossom runs full-service Klaviyo programs for $2,000–$5,000/month, month-to-month, with no long-term contracts. The guarantee is +20% attributed Klaviyo revenue within 90 days, or we work free until it is achieved, in writing. We take 4 new partner brands per month. See pricing.

Who should you hire?

• Do it yourself if you send only a few campaigns a month and have no flow gaps. Switching your reporting from opens to clicks and revenue per recipient costs nothing.
• Hire a freelancer if you only need campaign design or copy and can run strategy and testing in-house.
• Hire Blossom if you want flows, campaigns, segmentation and testing run together, with a written guarantee. Start with the free 5-area Klaviyo audit, delivered in 3–5 business days.

Talk to Blossom about your Klaviyo program