Subject Line Benchmarks

This report focuses on how subject line components like length, personalization, message type and industry impact email performance.

Some of our key findings include:

• Subject lines under 20 characters generated a 31% higher open rate than the overall average.
• Personalized subject lines generated 50% higher open rates and 58% higher click-to-open rates than non-personalized ones.
• Subject line length impacted open rates most significantly for the retail and technology industries.