A/B Testing

Test different subject lines to optimize your open rates.

What is A/B Testing?

A/B testing (also called split testing) lets you compare two subject lines to see which performs better. DailyDraft sends each version to a portion of your list, then sends the winner to everyone else.

How It Works

1. Create variants - Write 2 different subject lines
2. Test group - Each variant goes to 15% of subscribers
3. Wait period - System waits 2-4 hours for results
4. Winner selected - Higher open rate wins
5. Full send - Winner goes to remaining 70%

Setting Up an A/B Test

1. Open your issue for editing
2. Click "A/B Test Subject"
3. Enter your primary subject line (Version A)
4. Enter alternative subject line (Version B)
5. Click "Send with A/B Test"

AI-Powered Subject Lines

Let AI generate subject line variations:

1. Click the ✨ AI button next to the subject field
2. AI generates multiple variations
3. Select your favorites for testing

A/B Test Settings

Viewing Results

After the test completes, see results in your issue analytics:

• Open rate for each variant
• Which version won
• Statistical significance
• Final send metrics

Best Practices

Good A/B Test Ideas

• Length - Short vs. detailed subject
• Personalization - With name vs. without
• Urgency - Time-sensitive vs. evergreen
• Question vs. Statement
• Emoji vs. No Emoji

Minimum List Size

A/B testing works best with 1,000+ subscribers. Smaller lists may not have statistically significant results.