What do you use for marketing automation?

Hey Indie Hackers,

We are looking for a tool to implement a marketing automation pipeline in Mailbrew.

Some examples:

• send welcome email after user signs up
• send an email asking for unsubscribe reason if user cancels his subscription

We want something with a visual email editor, that let's you also visualize flow and conditions to send emails.

An issue we had with Mixpanel, that we are using right now, is that we couldn't set a delay to send the message after an event is logged.

Does something like this exist?