Maximize Open Rates: Klaviyo Send-Time Optimizer Workflow

Stop guessing when to send your Klaviyo email campaigns. This automated n8n workflow analyzes your past 90 days of campaign performance data to identify the optimal send times for each audience segment, delivering actionable insights directly to your inbox every Monday morning.

What this workflow does

Every Monday at 8 AM, the workflow automatically pulls all sent email campaigns from your Klaviyo account for the past 90 days. It fetches open rates and click rates for each campaign, then intelligently groups the results by audience segment and send hour. Time slots with at least 3 campaigns are ranked by average open rate performance, ensuring statistically meaningful recommendations.

You'll receive a beautifully formatted HTML report via Gmail showing your best-performing send times, broken down per audience segment, complete with medal icons highlighting your top 3 performing time slots. No more manual data analysis or spreadsheet wrestling—just clear, actionable send-time optimization insights.

Use cases

• Email marketing teams looking to boost open rates through data-driven send time optimization
• E-commerce businesses wanting to maximize campaign performance across different customer segments
• Marketing agencies managing multiple Klaviyo accounts and needing regular performance insights
• SaaS operators seeking to automate their email marketing analytics and reporting workflows

Technical details

Built with proven n8n nodes including HTTP Request for Klaviyo API integration, Code nodes for data processing and ranking logic, Gmail nodes for report delivery and error notifications, and Set nodes for data transformation. The workflow includes error handling triggers and configuration options to customize the lookback window and minimum campaign thresholds.

Setup takes just minutes: add your Klaviyo API key, connect your Gmail account, update recipient email addresses, and activate. The workflow runs automatically every Monday or can be triggered manually anytime from your n8n canvas.