Preact captures all the user data, and predicts whether they will upgrade or churn. You can then act based on that information, and reach out to the user.
Head of Growth Marketing (former) - Mention
1%Stacklist Startups Are Using Preact
Preact is customer success solution that helps software companies maximize their revenue by reducing churn and increasing upsells.
Visit the website: http://www.preact.com/