Your virtual
email marketer

Test your email content with AI to predict results in seconds. No more A/B testing or guessing what works!

Get Started Free
Screenshot of Envelope App

How Superlines content AI works

1. Type your content and campaign info

2. Watch how Superlines predicts the outcome

Screenshot of Envelope App

Skip A/B testing.

Superlines boosts email marketing performance and removes content headaches by using machine learning to pretest your content in seconds.

Screenshot of Envelope App

Instant content testing

Know which subject line, preheader, and copytext will get the most opens and clicks.

Campaign result predictions

Optimize your content already when planning a campaign by predicting conversions and revenue.

Automated copywriting

Superlines automatically writes and pretests new subject line and preheader ideas.

Supercharge your email sales with AI today.

Start increasing your open rate and CTR% now.

Get Started Free


Get in touch

Don't hesitate to contact useif you have more questions, ideas, feedback or just want to grab a coffee!

© 2021 Grew Oy. All rights reserved.

Privacy Policy