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Subject line A/B testing
1 creator use or recommend it
▲ 1 active in the last 90 days
1 recommend
Last discussed Oct 29, 2026
Testing multiple email subject lines on a sample of subscribers before sending the winner to the full list.
Recently discussed in
Want to Make Money With AI? Stop Just Chatting With It
Tyler Denk · Oct 29, 2026
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Tyler Denk
recommends
Used for: Improving newsletter open rates
Praised: Statistically significant open-rate gains; shorter subject lines perform better
vs: Two-word subject lines at 42% open rate vs. 37% for subject lines over five w...
"Every time that you post a newsletter, best practice is to test probably four different subject lines. I did that today... This is the one that won. It had 21% open rate. You can see the bottom one 17.9%. That 3% difference there at 130,000 subscr..."
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