back to tools
Subject Line A/B Tester
Simulate subscriber psychology to predict your winner.
VARIANT A
0 chars
Tip: 30–50 chars often performs best on mobile
VS
VARIANT B
0 chars
Tip: Try a question or negative framing here
Run A/B Simulation ⚡
Analyzing psychological triggers...
— SIMULATION COMPLETE —
VARIANT A
Predicted Open Rate
SCORE BREAKDOWN
VARIANT B
Predicted Open Rate
SCORE BREAKDOWN
🧠 PSYCHOLOGICAL ANALYSIS
← Run Another Test
RECENT TESTS
Clear history