Best Subject Line is an online app you can use for score your email subject lines to help boost your open rates.

We use an advanced algorithm to measure the word count, words used, and overall sentiment to generate a score that captures your subject line. We also provide suggestions based on how it can be improved.

Yes! We’ve seen great results with our clients in terms of improved open rates. But like always we recommend testing various subject lines to see what tone resonates with your audience.

When you create an account you can store all your previously tested subject lines and you’ll have access to great reports about the average score, overall sentiment, and may other insights to help make you a great email marketer.