Tool • Email & automation
Turn email ideas into stronger subject lines in seconds. Add your topic, choose a goal and generate multiple subject line options you can A/B test across campaigns and automations.
The AI subject line generator is included with Stratboost. Connect it to Ella, your templates and workflows so every send fits into a bigger lifecycle strategy.
Stratboost • AI subject line generator
Use one email idea to generate multiple subject lines, then track which styles perform best over time inside Ella.
How it works
You don’t need fancy copy formulas. Give the generator a bit of context about the email, and it turns that into clear, testable subject lines that match your brand.
Inside Stratboost, the subject line generator can pull from your offers and audience stored in Stratmind so each variation stays aligned with your positioning.
See it in action
Here are a few sample sets for different types of emails. Each one balances clarity with curiosity and finishes the job in the inbox instead of relying on clickbait.
Input: “Launch email for new summer collection, focus on light fabrics and everyday wear.”
1) Your new summer uniform just dropped ☀️
2) Light, breathable & made for real days out
3) The pieces you’ll actually wear all season
4) Meet the summer collection (before it sells out)
5) New arrivals for warm days & late nights
Input: “Weekly email with 3 content tips for online coaches, friendly but direct tone.”
1) 3 content tweaks for more clients this month
2) Stop posting daily. Do this instead.
3) The content plan I wish I had when I started
4) Before you post again, read this email
5) One small change = better leads from your content
Input: “Case study email about client going from 3 to 27 calls per month, confident tone.”
1) How we took this agency from 3 to 27 calls a month
2) The 30-day pipeline fix that changed everything
3) From “no calls” to a full calendar (real story)
4) What happened when we rebuilt this funnel
5) Want 27 calls a month? Start here.
Simple rules that work
Part of your full email system
On its own, this is a fast way to write subject lines. Inside Stratboost, it becomes part of a full email and lifecycle system powered by Ella and Stratmind.
Quick questions
You can copy the example structures from this page into any email platform. Inside Stratboost, the generator sits next to Ella and AI Email Writer so you can draft, test and track everything in one system.
Yes. The tool takes in your niche, audience and offer details, then adapts the language. You can use it for ecommerce, SaaS, coaching, agencies, local businesses and more.
You can tell the generator how direct or soft you want to be — for example “soft, educational”, “bold launch” or “plain-text founder update”. It will adjust style and intensity to match.
No. You can also use it to write subject lines for full sequences, like welcome flows, launch campaigns, win-back automations and evergreen nurture emails.
Build the full email stack
Use these templates to structure the body of your emails and flows, then layer subject lines on top.
Use these prompts to brief the generator with stronger angles before you create subject lines.
Put your subject lines inside full customer journeys so every open leads to a clear next step.
✨ Built for founders, creators, ecommerce brands and agencies
Stop guessing your subject lines. Turn each email idea into multiple options, test what works and build an email system that compounds over time instead of relying on one-off campaigns.
Create your Stratboost account →Start with your next newsletter, then roll the same system out across launches, flows and automated journeys.