Why optimizing your open rates is essential on Klaviyo
Email marketing remains one of the most profitable channels, generating an average of $42 for every dollar invested. But to take full advantage of it, your emails still need to be opened.
With an average open rate of 18 to 20% in e-commerce, there is considerable room for improvement. A low open rate not only impacts your conversions but also your sender reputation, risking your messages being sent to spam.
Klaviyo, a leader in marketing automation for e-commerce, offers automated flows that often generate 30 to 40% of email revenue. But without a good open rate, their potential is lost.
In this guide, discover 4 proven strategies to boost your open rates and maximize your marketing impact with Klaviyo.
Strategy 1: Precise segmentation and targeting of your Klaviyo flows
How to configure high-performing flow filters
- Filter by email engagement: Exclude unengaged contacts for 30-60 days to protect your reputation.
- Klaviyo example: Profile properties > Email activity > Has not opened an email in the last 30 days
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Target based on website behavior:
- Viewed a product but did not purchase
- Added an item to the cart but did not complete the purchase
- Purchased recently but did not leave a review
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Segment by customer value (RFM):
- VIP customers: Exclusive offers and early access
- Dormant customers: Re-engagement with a special offer
- New buyers: Loyalty emails
Leveraging conditional splits in your flows
- If a customer opens an email but does not buy → Send a different follow-up
- If a customer clicks on an offer but does not buy → Offer a promo code
Expected impact: +15 to 25% increase in open rate.
Strategy 2: Subject line optimization for maximum impact
How to write an irresistible subject line?
- Short and impactful: “New collection in stock – Limited offer”
- Advanced personalization: “Sarah, your exclusive offer expires tonight”
- Create urgency and curiosity:“Only 12 hours left to enjoy this offer”
A/B testing to find the best formula
- In Klaviyo, perform an A/B test on several email subject lines to see which generates the most opens.
Expected impact: 5 to 10% increase in open rates.
Strategy 3: Optimized timing and frequency for maximum engagement
When to send your emails to maximize opens?
- Analyze your Klaviyo data:Go to Analytics > Engagement and look for peaks in opens.
- Adapt sending to time zones:In Flow Settings > Timezone, enable “Recipient’s Local Timezone”.
Estimated impact: +5 to 10% improvement in open rate.
Tests on the day and time of sending
- Tuesday and Thursday at 10 AM: Best general performance
- Sunday evening at 8 PM: Good results for newsletters
Optimize email frequency
- Abandoned cart: 1 hour after > 24 hours > 48 hours
- Welcome: Immediate > 2 days after > 7 days after
- Re-engagement: 30 days of inactivity > 60 days > 90 days
Expected impact: +10 to 20% improvement in open rate.
Strategy 4: Improve deliverability to avoid spam
- Authenticate your Sending Domain: SPF, DKIM, and DMARC in Klaviyo.
- Clean your Contact List: Remove inactive emails and use a double opt-in.
- Use Reliable Sender Addresses: “[Brand Name] Customer Service”
Discover another article on strategies to adopt to increase your open rate here.
Summary table of performance improvements
| Strategy | Potential gain in open rate |
|---|---|
| Advanced segmentation | +15 to 25% |
| Subject line optimization | +5 to 10% |
| Optimized timing and frequency | +10 to 20% |
| Improved deliverability | +5 to 15% |
Conclusion
Optimizing your open rates is an ongoing effort. Each improvement contributes to increasing engagement and sales.
5 Immediate Actions to Implement:
- Audit your flows for better segmentation
- Test 3 new subject lines this week
- Analyze the best sending time on Klaviyo
- Check your deliverability with SPF/DKIM/DMARC
- Create an open rate tracking dashboard
Put these strategies into action and watch your open rates grow in 2026.
