Sophie Laurent·
60 email subject lines, ranked by predicted open rate
Produces 50+ email subject lines across 10 proven formulas with open rate predictions and A/B test pairs.
Email Subject Line Generator (50+ Variations)
Generate 60 email subject lines for {{campaign_type}} promoting {{product_name}} to {{target_audience}}. EMAIL CONTENT SUMMARY: {{email_content}}. DESIRED OUTCOME: {{desired_outcome}}. TONE: {{tone}}. Create 6 variations for each of these 10 formulas: (1) CURIORITY GAP: The truth about... / What [authority] knows... (2) URGENCY/SCARCITY: Countdown, limited spots, deadline-driven. (3) HOW-TO PROMISE: How to [result] in [timeframe]. (4) QUESTION: Open-ended questions that trigger curiosity. (5) LIST/NUMBER: [X] ways to... / The top [X]... (6) PERSONAL/STORY: First-person narrative hooks. (7) DIRECT BENEFIT: Clear outcome-driven lines. (8) CONTROVERSIAL/CONTRARIAN: Challenge common beliefs. (9) EXCLUSIVE/INSIDER: For [audience] only / Inside: [benefit]. (10) EMOTIONAL TRIGGER: Fear, excitement, relief, or FOMO-driven. For EACH subject line, include: Character count, Preview text suggestion (pairing), Predicted performance tier (High/Medium/Low), Best use case (welcome, promo, nurture, re-engagement), and Emojis suggestions if appropriate. Also provide: 10 RE: and FWD: style subject lines for follow-ups, 5 plain-text friendly subject lines that look personal, and 5 from the CEO authority subject lines. Flag any that might trigger spam filters.
Ergebnisse
60 subject lines across 10 formulas. Top performers per formula, with predicted tier:
| Subject | Formula | Chars | Tier |
|---------|---------|-------|------|
| The truth about your messy prompt doc | Curiosity | 38 | High |
| Last day for lifetime access ⏳ | Urgency | 30 | High |
| How to stop retyping prompts in 30 sec | How-To | 39 | High |
| Still copy-pasting from a Google Doc? | Question | 37 | High |
| 7 prompts every developer should save | List | 38 | Med |
| I lost my best prompt. Never again. | Story | 35 | High |
| Your prompts, one shortcut away | Benefit | 31 | Med |
| Your prompt library is the wrong tool | Contrarian | 37 | Med |
| For heavy AI users only | Exclusive | 24 | Med |
| Don't lose another great prompt | Emotional | 31 | High |
**Spam-filter flags:** avoid "FREE!!!" in caps and excess emoji. The ⏳ above is safe (single, contextual).
**Best openers to A/B first:** the Curiosity and Question lines — both lead with the reader's pain, not the product.
Modell: Claude Sonnet 4
14 Likes7 SavesScore: 9
1 Kommentar
Jake Thompson·
I'd A/B test variant 2 against 4, both are strong.