
50 Cold Email Subject Lines That Actually Get Opened (2024)
After testing millions of cold emails, I've distilled 50 cold email subject lines that consistently outperform. The average open rate is 20-25%, but personalized subject lines push past 40%. These 50 lines are organized by category — curiosity, pain point, social proof, follow-up, and breakup — with open rate benchmarks and A/B testing tips.





