Writing great subject lines can feel like a guessing game. That's why we built AI subject line suggestions to help you find the right words faster. This tool looks at your email content and generates subject lines designed to grab attention and boost open rates.
With AI-powered subject line suggestions, you can focus on creating great content while Kit helps you find the perfect words to get it opened.
How it works
The best part about our AI subject line tool is how simple it is to use. First, write your email content. This gives our AI the context it needs to create relevant suggestions. When you're ready, click the "Generate subject lines" button above the subject line field, and you'll see five suggestions based on the email content you've written.
Click on the you like most or use them as inspiration for your own perfect subject line. If you don't like the suggested subject lines, use refresh button to generate more suggestions.
For creators on any of our paid plans, you've got unlimited access to use the AI subject tool as many times as you'd like.
If you're on our Free plan, you can explore this feature five times to see how it fits your workflow. Each time you generate a set of five suggestions, that counts as one of your five uses.
For instance, if you generate suggestions for today's email, then refresh for new ones, you've used it twice. Once you've experienced the value and used your five turns, you can upgrade to a paid plan for unlimited access.
Make it work with A/B testing
Already using A/B testing for your subject lines? Our AI suggestions work seamlessly with our A/B subject line test feature. Click on two of the AI-generated subject lines that you like, followed by the button "Use subjects", and we will automatically turn on the A/B test for you.
Over time, you'll learn what combinations drive the highest open rates for your audience.
Getting the most from AI suggestions
The secret to success with AI subject lines is treating them as a collaborative tool rather than a magic solution. Write your email content first—this gives the AI the context it needs to generate relevant suggestions. Don't be afraid to generate multiple sets of suggestions to explore different angles, and remember that you can always modify the suggestions to better match your voice.
Remember, this tool isn't here to replace your creativity — it's here to keep your creative flow uninterrupted. Think of these suggestions as a starting point. Sometimes they'll be perfect as is, and other times they'll spark an idea that leads to something even better. The goal is to help you find the right words faster, so you can focus on what you do best: creating amazing content for your audience.